1099 lines
46 KiB
C
1099 lines
46 KiB
C
/*
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* Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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/* ====== Tuning parameters ====== */
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#define ZSTDMT_NBTHREADS_MAX 200
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#define ZSTDMT_OVERLAPLOG_DEFAULT 6
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/* ====== Compiler specifics ====== */
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#if defined(_MSC_VER)
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# pragma warning(disable : 4204) /* disable: C4204: non-constant aggregate initializer */
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#endif
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/* ====== Dependencies ====== */
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#include <string.h> /* memcpy, memset */
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#include "pool.h" /* threadpool */
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#include "threading.h" /* mutex */
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#include "zstd_internal.h" /* MIN, ERROR, ZSTD_*, ZSTD_highbit32 */
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#include "zstdmt_compress.h"
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/* ====== Debug ====== */
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#if defined(ZSTD_DEBUG) && (ZSTD_DEBUG>=2)
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# include <stdio.h>
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# include <unistd.h>
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# include <sys/times.h>
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# define DEBUGLOGRAW(l, ...) if (l<=ZSTD_DEBUG) { fprintf(stderr, __VA_ARGS__); }
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# define DEBUG_PRINTHEX(l,p,n) { \
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unsigned debug_u; \
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for (debug_u=0; debug_u<(n); debug_u++) \
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DEBUGLOGRAW(l, "%02X ", ((const unsigned char*)(p))[debug_u]); \
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DEBUGLOGRAW(l, " \n"); \
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}
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static unsigned long long GetCurrentClockTimeMicroseconds(void)
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{
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static clock_t _ticksPerSecond = 0;
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if (_ticksPerSecond <= 0) _ticksPerSecond = sysconf(_SC_CLK_TCK);
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{ struct tms junk; clock_t newTicks = (clock_t) times(&junk);
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return ((((unsigned long long)newTicks)*(1000000))/_ticksPerSecond); }
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}
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#define MUTEX_WAIT_TIME_DLEVEL 6
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#define ZSTD_PTHREAD_MUTEX_LOCK(mutex) { \
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if (ZSTD_DEBUG >= MUTEX_WAIT_TIME_DLEVEL) { \
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unsigned long long const beforeTime = GetCurrentClockTimeMicroseconds(); \
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ZSTD_pthread_mutex_lock(mutex); \
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{ unsigned long long const afterTime = GetCurrentClockTimeMicroseconds(); \
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unsigned long long const elapsedTime = (afterTime-beforeTime); \
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if (elapsedTime > 1000) { /* or whatever threshold you like; I'm using 1 millisecond here */ \
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DEBUGLOG(MUTEX_WAIT_TIME_DLEVEL, "Thread took %llu microseconds to acquire mutex %s \n", \
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elapsedTime, #mutex); \
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} } \
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} else { \
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ZSTD_pthread_mutex_lock(mutex); \
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} \
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}
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#else
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# define ZSTD_PTHREAD_MUTEX_LOCK(m) ZSTD_pthread_mutex_lock(m)
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# define DEBUG_PRINTHEX(l,p,n) {}
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#endif
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/* ===== Buffer Pool ===== */
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/* a single Buffer Pool can be invoked from multiple threads in parallel */
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typedef struct buffer_s {
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void* start;
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size_t size;
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} buffer_t;
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static const buffer_t g_nullBuffer = { NULL, 0 };
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typedef struct ZSTDMT_bufferPool_s {
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ZSTD_pthread_mutex_t poolMutex;
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size_t bufferSize;
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unsigned totalBuffers;
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unsigned nbBuffers;
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ZSTD_customMem cMem;
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buffer_t bTable[1]; /* variable size */
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} ZSTDMT_bufferPool;
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static ZSTDMT_bufferPool* ZSTDMT_createBufferPool(unsigned nbThreads, ZSTD_customMem cMem)
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{
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unsigned const maxNbBuffers = 2*nbThreads + 3;
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ZSTDMT_bufferPool* const bufPool = (ZSTDMT_bufferPool*)ZSTD_calloc(
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sizeof(ZSTDMT_bufferPool) + (maxNbBuffers-1) * sizeof(buffer_t), cMem);
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if (bufPool==NULL) return NULL;
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if (ZSTD_pthread_mutex_init(&bufPool->poolMutex, NULL)) {
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ZSTD_free(bufPool, cMem);
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return NULL;
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}
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bufPool->bufferSize = 64 KB;
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bufPool->totalBuffers = maxNbBuffers;
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bufPool->nbBuffers = 0;
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bufPool->cMem = cMem;
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return bufPool;
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}
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static void ZSTDMT_freeBufferPool(ZSTDMT_bufferPool* bufPool)
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{
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unsigned u;
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DEBUGLOG(3, "ZSTDMT_freeBufferPool (address:%08X)", (U32)(size_t)bufPool);
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if (!bufPool) return; /* compatibility with free on NULL */
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for (u=0; u<bufPool->totalBuffers; u++) {
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DEBUGLOG(4, "free buffer %2u (address:%08X)", u, (U32)(size_t)bufPool->bTable[u].start);
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ZSTD_free(bufPool->bTable[u].start, bufPool->cMem);
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}
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ZSTD_pthread_mutex_destroy(&bufPool->poolMutex);
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ZSTD_free(bufPool, bufPool->cMem);
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}
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/* only works at initialization, not during compression */
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static size_t ZSTDMT_sizeof_bufferPool(ZSTDMT_bufferPool* bufPool)
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{
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size_t const poolSize = sizeof(*bufPool)
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+ (bufPool->totalBuffers - 1) * sizeof(buffer_t);
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unsigned u;
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size_t totalBufferSize = 0;
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ZSTD_pthread_mutex_lock(&bufPool->poolMutex);
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for (u=0; u<bufPool->totalBuffers; u++)
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totalBufferSize += bufPool->bTable[u].size;
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ZSTD_pthread_mutex_unlock(&bufPool->poolMutex);
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return poolSize + totalBufferSize;
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}
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static void ZSTDMT_setBufferSize(ZSTDMT_bufferPool* bufPool, size_t bSize)
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{
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bufPool->bufferSize = bSize;
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}
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/** ZSTDMT_getBuffer() :
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* assumption : bufPool must be valid */
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static buffer_t ZSTDMT_getBuffer(ZSTDMT_bufferPool* bufPool)
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{
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size_t const bSize = bufPool->bufferSize;
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DEBUGLOG(5, "ZSTDMT_getBuffer");
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ZSTD_pthread_mutex_lock(&bufPool->poolMutex);
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if (bufPool->nbBuffers) { /* try to use an existing buffer */
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buffer_t const buf = bufPool->bTable[--(bufPool->nbBuffers)];
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size_t const availBufferSize = buf.size;
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bufPool->bTable[bufPool->nbBuffers] = g_nullBuffer;
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if ((availBufferSize >= bSize) & (availBufferSize <= 10*bSize)) {
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/* large enough, but not too much */
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ZSTD_pthread_mutex_unlock(&bufPool->poolMutex);
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return buf;
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}
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/* size conditions not respected : scratch this buffer, create new one */
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DEBUGLOG(5, "existing buffer does not meet size conditions => freeing");
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ZSTD_free(buf.start, bufPool->cMem);
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}
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ZSTD_pthread_mutex_unlock(&bufPool->poolMutex);
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/* create new buffer */
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DEBUGLOG(5, "create a new buffer");
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{ buffer_t buffer;
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void* const start = ZSTD_malloc(bSize, bufPool->cMem);
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buffer.start = start; /* note : start can be NULL if malloc fails ! */
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buffer.size = (start==NULL) ? 0 : bSize;
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return buffer;
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}
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}
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/* store buffer for later re-use, up to pool capacity */
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static void ZSTDMT_releaseBuffer(ZSTDMT_bufferPool* bufPool, buffer_t buf)
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{
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if (buf.start == NULL) return; /* compatible with release on NULL */
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DEBUGLOG(5, "ZSTDMT_releaseBuffer");
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ZSTD_pthread_mutex_lock(&bufPool->poolMutex);
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if (bufPool->nbBuffers < bufPool->totalBuffers) {
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bufPool->bTable[bufPool->nbBuffers++] = buf; /* stored for later use */
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ZSTD_pthread_mutex_unlock(&bufPool->poolMutex);
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return;
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}
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ZSTD_pthread_mutex_unlock(&bufPool->poolMutex);
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/* Reached bufferPool capacity (should not happen) */
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DEBUGLOG(5, "buffer pool capacity reached => freeing ");
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ZSTD_free(buf.start, bufPool->cMem);
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}
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/* Sets parameters relevant to the compression job, initializing others to
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* default values. Notably, nbThreads should probably be zero. */
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static ZSTD_CCtx_params ZSTDMT_makeJobCCtxParams(ZSTD_CCtx_params const params)
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{
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ZSTD_CCtx_params jobParams;
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memset(&jobParams, 0, sizeof(jobParams));
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jobParams.cParams = params.cParams;
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jobParams.fParams = params.fParams;
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jobParams.compressionLevel = params.compressionLevel;
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jobParams.ldmParams = params.ldmParams;
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return jobParams;
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}
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/* ===== CCtx Pool ===== */
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/* a single CCtx Pool can be invoked from multiple threads in parallel */
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typedef struct {
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ZSTD_pthread_mutex_t poolMutex;
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unsigned totalCCtx;
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unsigned availCCtx;
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ZSTD_customMem cMem;
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ZSTD_CCtx* cctx[1]; /* variable size */
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} ZSTDMT_CCtxPool;
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/* note : all CCtx borrowed from the pool should be released back to the pool _before_ freeing the pool */
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static void ZSTDMT_freeCCtxPool(ZSTDMT_CCtxPool* pool)
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{
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unsigned u;
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for (u=0; u<pool->totalCCtx; u++)
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ZSTD_freeCCtx(pool->cctx[u]); /* note : compatible with free on NULL */
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ZSTD_pthread_mutex_destroy(&pool->poolMutex);
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ZSTD_free(pool, pool->cMem);
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}
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/* ZSTDMT_createCCtxPool() :
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* implies nbThreads >= 1 , checked by caller ZSTDMT_createCCtx() */
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static ZSTDMT_CCtxPool* ZSTDMT_createCCtxPool(unsigned nbThreads,
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ZSTD_customMem cMem)
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{
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ZSTDMT_CCtxPool* const cctxPool = (ZSTDMT_CCtxPool*) ZSTD_calloc(
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sizeof(ZSTDMT_CCtxPool) + (nbThreads-1)*sizeof(ZSTD_CCtx*), cMem);
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if (!cctxPool) return NULL;
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if (ZSTD_pthread_mutex_init(&cctxPool->poolMutex, NULL)) {
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ZSTD_free(cctxPool, cMem);
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return NULL;
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}
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cctxPool->cMem = cMem;
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cctxPool->totalCCtx = nbThreads;
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cctxPool->availCCtx = 1; /* at least one cctx for single-thread mode */
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cctxPool->cctx[0] = ZSTD_createCCtx_advanced(cMem);
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if (!cctxPool->cctx[0]) { ZSTDMT_freeCCtxPool(cctxPool); return NULL; }
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DEBUGLOG(3, "cctxPool created, with %u threads", nbThreads);
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return cctxPool;
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}
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/* only works during initialization phase, not during compression */
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static size_t ZSTDMT_sizeof_CCtxPool(ZSTDMT_CCtxPool* cctxPool)
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{
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ZSTD_pthread_mutex_lock(&cctxPool->poolMutex);
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{ unsigned const nbThreads = cctxPool->totalCCtx;
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size_t const poolSize = sizeof(*cctxPool)
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+ (nbThreads-1)*sizeof(ZSTD_CCtx*);
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unsigned u;
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size_t totalCCtxSize = 0;
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for (u=0; u<nbThreads; u++) {
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totalCCtxSize += ZSTD_sizeof_CCtx(cctxPool->cctx[u]);
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}
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ZSTD_pthread_mutex_unlock(&cctxPool->poolMutex);
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return poolSize + totalCCtxSize;
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}
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}
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static ZSTD_CCtx* ZSTDMT_getCCtx(ZSTDMT_CCtxPool* cctxPool)
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{
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DEBUGLOG(5, "ZSTDMT_getCCtx");
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ZSTD_pthread_mutex_lock(&cctxPool->poolMutex);
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if (cctxPool->availCCtx) {
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cctxPool->availCCtx--;
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{ ZSTD_CCtx* const cctx = cctxPool->cctx[cctxPool->availCCtx];
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ZSTD_pthread_mutex_unlock(&cctxPool->poolMutex);
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return cctx;
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} }
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ZSTD_pthread_mutex_unlock(&cctxPool->poolMutex);
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DEBUGLOG(5, "create one more CCtx");
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return ZSTD_createCCtx_advanced(cctxPool->cMem); /* note : can be NULL, when creation fails ! */
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}
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static void ZSTDMT_releaseCCtx(ZSTDMT_CCtxPool* pool, ZSTD_CCtx* cctx)
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{
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if (cctx==NULL) return; /* compatibility with release on NULL */
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ZSTD_pthread_mutex_lock(&pool->poolMutex);
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if (pool->availCCtx < pool->totalCCtx)
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pool->cctx[pool->availCCtx++] = cctx;
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else {
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/* pool overflow : should not happen, since totalCCtx==nbThreads */
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DEBUGLOG(5, "CCtx pool overflow : free cctx");
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ZSTD_freeCCtx(cctx);
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}
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ZSTD_pthread_mutex_unlock(&pool->poolMutex);
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}
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/* ===== Thread worker ===== */
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typedef struct {
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buffer_t src;
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const void* srcStart;
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size_t dictSize;
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size_t srcSize;
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buffer_t dstBuff;
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size_t cSize;
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size_t dstFlushed;
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unsigned firstChunk;
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unsigned lastChunk;
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unsigned jobCompleted;
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unsigned jobScanned;
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ZSTD_pthread_mutex_t* jobCompleted_mutex;
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ZSTD_pthread_cond_t* jobCompleted_cond;
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ZSTD_CCtx_params params;
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const ZSTD_CDict* cdict;
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ZSTDMT_CCtxPool* cctxPool;
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ZSTDMT_bufferPool* bufPool;
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unsigned long long fullFrameSize;
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} ZSTDMT_jobDescription;
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/* ZSTDMT_compressChunk() : POOL_function type */
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void ZSTDMT_compressChunk(void* jobDescription)
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{
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ZSTDMT_jobDescription* const job = (ZSTDMT_jobDescription*)jobDescription;
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ZSTD_CCtx* cctx = ZSTDMT_getCCtx(job->cctxPool);
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const void* const src = (const char*)job->srcStart + job->dictSize;
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buffer_t dstBuff = job->dstBuff;
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DEBUGLOG(5, "job (first:%u) (last:%u) : dictSize %u, srcSize %u",
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job->firstChunk, job->lastChunk, (U32)job->dictSize, (U32)job->srcSize);
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if (cctx==NULL) {
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job->cSize = ERROR(memory_allocation);
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goto _endJob;
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}
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if (dstBuff.start == NULL) {
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dstBuff = ZSTDMT_getBuffer(job->bufPool);
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if (dstBuff.start==NULL) {
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job->cSize = ERROR(memory_allocation);
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goto _endJob;
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}
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job->dstBuff = dstBuff;
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}
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if (job->cdict) { /* should only happen for first segment */
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size_t const initError = ZSTD_compressBegin_usingCDict_advanced(cctx, job->cdict, job->params.fParams, job->fullFrameSize);
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DEBUGLOG(5, "using CDict");
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if (ZSTD_isError(initError)) { job->cSize = initError; goto _endJob; }
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} else { /* srcStart points at reloaded section */
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if (!job->firstChunk) job->params.fParams.contentSizeFlag = 0; /* ensure no srcSize control */
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{ ZSTD_CCtx_params jobParams = job->params;
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size_t const forceWindowError =
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ZSTD_CCtxParam_setParameter(&jobParams, ZSTD_p_forceMaxWindow, !job->firstChunk);
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/* Force loading dictionary in "content-only" mode (no header analysis) */
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size_t const initError = ZSTD_compressBegin_advanced_internal(cctx, job->srcStart, job->dictSize, ZSTD_dm_rawContent, jobParams, job->fullFrameSize);
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if (ZSTD_isError(initError) || ZSTD_isError(forceWindowError)) {
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job->cSize = initError;
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goto _endJob;
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}
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} }
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if (!job->firstChunk) { /* flush and overwrite frame header when it's not first segment */
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size_t const hSize = ZSTD_compressContinue(cctx, dstBuff.start, dstBuff.size, src, 0);
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if (ZSTD_isError(hSize)) { job->cSize = hSize; goto _endJob; }
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ZSTD_invalidateRepCodes(cctx);
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}
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DEBUGLOG(5, "Compressing : ");
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DEBUG_PRINTHEX(4, job->srcStart, 12);
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job->cSize = (job->lastChunk) ?
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ZSTD_compressEnd (cctx, dstBuff.start, dstBuff.size, src, job->srcSize) :
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ZSTD_compressContinue(cctx, dstBuff.start, dstBuff.size, src, job->srcSize);
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DEBUGLOG(5, "compressed %u bytes into %u bytes (first:%u) (last:%u)",
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(unsigned)job->srcSize, (unsigned)job->cSize, job->firstChunk, job->lastChunk);
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DEBUGLOG(5, "dstBuff.size : %u ; => %s", (U32)dstBuff.size, ZSTD_getErrorName(job->cSize));
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_endJob:
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ZSTDMT_releaseCCtx(job->cctxPool, cctx);
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ZSTDMT_releaseBuffer(job->bufPool, job->src);
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job->src = g_nullBuffer; job->srcStart = NULL;
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ZSTD_PTHREAD_MUTEX_LOCK(job->jobCompleted_mutex);
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job->jobCompleted = 1;
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job->jobScanned = 0;
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ZSTD_pthread_cond_signal(job->jobCompleted_cond);
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ZSTD_pthread_mutex_unlock(job->jobCompleted_mutex);
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}
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/* ------------------------------------------ */
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/* ===== Multi-threaded compression ===== */
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/* ------------------------------------------ */
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typedef struct {
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buffer_t buffer;
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size_t filled;
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} inBuff_t;
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struct ZSTDMT_CCtx_s {
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POOL_ctx* factory;
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ZSTDMT_jobDescription* jobs;
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ZSTDMT_bufferPool* bufPool;
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ZSTDMT_CCtxPool* cctxPool;
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ZSTD_pthread_mutex_t jobCompleted_mutex;
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ZSTD_pthread_cond_t jobCompleted_cond;
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size_t targetSectionSize;
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size_t inBuffSize;
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size_t dictSize;
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size_t targetDictSize;
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inBuff_t inBuff;
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ZSTD_CCtx_params params;
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XXH64_state_t xxhState;
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unsigned jobIDMask;
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unsigned doneJobID;
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unsigned nextJobID;
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unsigned frameEnded;
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unsigned allJobsCompleted;
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unsigned long long frameContentSize;
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ZSTD_customMem cMem;
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ZSTD_CDict* cdictLocal;
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const ZSTD_CDict* cdict;
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};
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static ZSTDMT_jobDescription* ZSTDMT_allocJobsTable(U32* nbJobsPtr, ZSTD_customMem cMem)
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{
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U32 const nbJobsLog2 = ZSTD_highbit32(*nbJobsPtr) + 1;
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U32 const nbJobs = 1 << nbJobsLog2;
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*nbJobsPtr = nbJobs;
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return (ZSTDMT_jobDescription*) ZSTD_calloc(
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nbJobs * sizeof(ZSTDMT_jobDescription), cMem);
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}
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/* Internal only */
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size_t ZSTDMT_initializeCCtxParameters(ZSTD_CCtx_params* params, unsigned nbThreads)
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{
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params->nbThreads = nbThreads;
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params->overlapSizeLog = ZSTDMT_OVERLAPLOG_DEFAULT;
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params->jobSize = 0;
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return 0;
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}
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ZSTDMT_CCtx* ZSTDMT_createCCtx_advanced(unsigned nbThreads, ZSTD_customMem cMem)
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{
|
|
ZSTDMT_CCtx* mtctx;
|
|
U32 nbJobs = nbThreads + 2;
|
|
DEBUGLOG(3, "ZSTDMT_createCCtx_advanced");
|
|
|
|
if (nbThreads < 1) return NULL;
|
|
nbThreads = MIN(nbThreads , ZSTDMT_NBTHREADS_MAX);
|
|
if ((cMem.customAlloc!=NULL) ^ (cMem.customFree!=NULL))
|
|
/* invalid custom allocator */
|
|
return NULL;
|
|
|
|
mtctx = (ZSTDMT_CCtx*) ZSTD_calloc(sizeof(ZSTDMT_CCtx), cMem);
|
|
if (!mtctx) return NULL;
|
|
ZSTDMT_initializeCCtxParameters(&mtctx->params, nbThreads);
|
|
mtctx->cMem = cMem;
|
|
mtctx->allJobsCompleted = 1;
|
|
mtctx->factory = POOL_create_advanced(nbThreads, 0, cMem);
|
|
mtctx->jobs = ZSTDMT_allocJobsTable(&nbJobs, cMem);
|
|
mtctx->jobIDMask = nbJobs - 1;
|
|
mtctx->bufPool = ZSTDMT_createBufferPool(nbThreads, cMem);
|
|
mtctx->cctxPool = ZSTDMT_createCCtxPool(nbThreads, cMem);
|
|
if (!mtctx->factory | !mtctx->jobs | !mtctx->bufPool | !mtctx->cctxPool) {
|
|
ZSTDMT_freeCCtx(mtctx);
|
|
return NULL;
|
|
}
|
|
if (ZSTD_pthread_mutex_init(&mtctx->jobCompleted_mutex, NULL)) {
|
|
ZSTDMT_freeCCtx(mtctx);
|
|
return NULL;
|
|
}
|
|
if (ZSTD_pthread_cond_init(&mtctx->jobCompleted_cond, NULL)) {
|
|
ZSTDMT_freeCCtx(mtctx);
|
|
return NULL;
|
|
}
|
|
DEBUGLOG(3, "mt_cctx created, for %u threads", nbThreads);
|
|
return mtctx;
|
|
}
|
|
|
|
ZSTDMT_CCtx* ZSTDMT_createCCtx(unsigned nbThreads)
|
|
{
|
|
return ZSTDMT_createCCtx_advanced(nbThreads, ZSTD_defaultCMem);
|
|
}
|
|
|
|
/* ZSTDMT_releaseAllJobResources() :
|
|
* note : ensure all workers are killed first ! */
|
|
static void ZSTDMT_releaseAllJobResources(ZSTDMT_CCtx* mtctx)
|
|
{
|
|
unsigned jobID;
|
|
DEBUGLOG(3, "ZSTDMT_releaseAllJobResources");
|
|
for (jobID=0; jobID <= mtctx->jobIDMask; jobID++) {
|
|
DEBUGLOG(4, "job%02u: release dst address %08X", jobID, (U32)(size_t)mtctx->jobs[jobID].dstBuff.start);
|
|
ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->jobs[jobID].dstBuff);
|
|
mtctx->jobs[jobID].dstBuff = g_nullBuffer;
|
|
DEBUGLOG(4, "job%02u: release src address %08X", jobID, (U32)(size_t)mtctx->jobs[jobID].src.start);
|
|
ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->jobs[jobID].src);
|
|
mtctx->jobs[jobID].src = g_nullBuffer;
|
|
}
|
|
memset(mtctx->jobs, 0, (mtctx->jobIDMask+1)*sizeof(ZSTDMT_jobDescription));
|
|
DEBUGLOG(4, "input: release address %08X", (U32)(size_t)mtctx->inBuff.buffer.start);
|
|
ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->inBuff.buffer);
|
|
mtctx->inBuff.buffer = g_nullBuffer;
|
|
mtctx->allJobsCompleted = 1;
|
|
}
|
|
|
|
static void ZSTDMT_waitForAllJobsCompleted(ZSTDMT_CCtx* zcs)
|
|
{
|
|
DEBUGLOG(4, "ZSTDMT_waitForAllJobsCompleted");
|
|
while (zcs->doneJobID < zcs->nextJobID) {
|
|
unsigned const jobID = zcs->doneJobID & zcs->jobIDMask;
|
|
ZSTD_PTHREAD_MUTEX_LOCK(&zcs->jobCompleted_mutex);
|
|
while (zcs->jobs[jobID].jobCompleted==0) {
|
|
DEBUGLOG(5, "waiting for jobCompleted signal from chunk %u", zcs->doneJobID); /* we want to block when waiting for data to flush */
|
|
ZSTD_pthread_cond_wait(&zcs->jobCompleted_cond, &zcs->jobCompleted_mutex);
|
|
}
|
|
ZSTD_pthread_mutex_unlock(&zcs->jobCompleted_mutex);
|
|
zcs->doneJobID++;
|
|
}
|
|
}
|
|
|
|
size_t ZSTDMT_freeCCtx(ZSTDMT_CCtx* mtctx)
|
|
{
|
|
if (mtctx==NULL) return 0; /* compatible with free on NULL */
|
|
POOL_free(mtctx->factory); /* stop and free worker threads */
|
|
ZSTDMT_releaseAllJobResources(mtctx); /* release job resources into pools first */
|
|
ZSTD_free(mtctx->jobs, mtctx->cMem);
|
|
ZSTDMT_freeBufferPool(mtctx->bufPool);
|
|
ZSTDMT_freeCCtxPool(mtctx->cctxPool);
|
|
ZSTD_freeCDict(mtctx->cdictLocal);
|
|
ZSTD_pthread_mutex_destroy(&mtctx->jobCompleted_mutex);
|
|
ZSTD_pthread_cond_destroy(&mtctx->jobCompleted_cond);
|
|
ZSTD_free(mtctx, mtctx->cMem);
|
|
return 0;
|
|
}
|
|
|
|
size_t ZSTDMT_sizeof_CCtx(ZSTDMT_CCtx* mtctx)
|
|
{
|
|
if (mtctx == NULL) return 0; /* supports sizeof NULL */
|
|
return sizeof(*mtctx)
|
|
+ POOL_sizeof(mtctx->factory)
|
|
+ ZSTDMT_sizeof_bufferPool(mtctx->bufPool)
|
|
+ (mtctx->jobIDMask+1) * sizeof(ZSTDMT_jobDescription)
|
|
+ ZSTDMT_sizeof_CCtxPool(mtctx->cctxPool)
|
|
+ ZSTD_sizeof_CDict(mtctx->cdictLocal);
|
|
}
|
|
|
|
/* Internal only */
|
|
size_t ZSTDMT_CCtxParam_setMTCtxParameter(
|
|
ZSTD_CCtx_params* params, ZSTDMT_parameter parameter, unsigned value) {
|
|
switch(parameter)
|
|
{
|
|
case ZSTDMT_p_sectionSize :
|
|
params->jobSize = value;
|
|
return 0;
|
|
case ZSTDMT_p_overlapSectionLog :
|
|
DEBUGLOG(4, "ZSTDMT_p_overlapSectionLog : %u", value);
|
|
params->overlapSizeLog = (value >= 9) ? 9 : value;
|
|
return 0;
|
|
default :
|
|
return ERROR(parameter_unsupported);
|
|
}
|
|
}
|
|
|
|
size_t ZSTDMT_setMTCtxParameter(ZSTDMT_CCtx* mtctx, ZSTDMT_parameter parameter, unsigned value)
|
|
{
|
|
switch(parameter)
|
|
{
|
|
case ZSTDMT_p_sectionSize :
|
|
return ZSTDMT_CCtxParam_setMTCtxParameter(&mtctx->params, parameter, value);
|
|
case ZSTDMT_p_overlapSectionLog :
|
|
return ZSTDMT_CCtxParam_setMTCtxParameter(&mtctx->params, parameter, value);
|
|
default :
|
|
return ERROR(parameter_unsupported);
|
|
}
|
|
}
|
|
|
|
/* ------------------------------------------ */
|
|
/* ===== Multi-threaded compression ===== */
|
|
/* ------------------------------------------ */
|
|
|
|
static unsigned computeNbChunks(size_t srcSize, unsigned windowLog, unsigned nbThreads) {
|
|
size_t const chunkSizeTarget = (size_t)1 << (windowLog + 2);
|
|
size_t const chunkMaxSize = chunkSizeTarget << 2;
|
|
size_t const passSizeMax = chunkMaxSize * nbThreads;
|
|
unsigned const multiplier = (unsigned)(srcSize / passSizeMax) + 1;
|
|
unsigned const nbChunksLarge = multiplier * nbThreads;
|
|
unsigned const nbChunksMax = (unsigned)(srcSize / chunkSizeTarget) + 1;
|
|
unsigned const nbChunksSmall = MIN(nbChunksMax, nbThreads);
|
|
return (multiplier>1) ? nbChunksLarge : nbChunksSmall;
|
|
}
|
|
|
|
static size_t ZSTDMT_compress_advanced_internal(
|
|
ZSTDMT_CCtx* mtctx,
|
|
void* dst, size_t dstCapacity,
|
|
const void* src, size_t srcSize,
|
|
const ZSTD_CDict* cdict,
|
|
ZSTD_CCtx_params const params)
|
|
{
|
|
ZSTD_CCtx_params const jobParams = ZSTDMT_makeJobCCtxParams(params);
|
|
unsigned const overlapRLog = (params.overlapSizeLog>9) ? 0 : 9-params.overlapSizeLog;
|
|
size_t const overlapSize = (overlapRLog>=9) ? 0 : (size_t)1 << (params.cParams.windowLog - overlapRLog);
|
|
unsigned nbChunks = computeNbChunks(srcSize, params.cParams.windowLog, params.nbThreads);
|
|
size_t const proposedChunkSize = (srcSize + (nbChunks-1)) / nbChunks;
|
|
size_t const avgChunkSize = ((proposedChunkSize & 0x1FFFF) < 0x7FFF) ? proposedChunkSize + 0xFFFF : proposedChunkSize; /* avoid too small last block */
|
|
const char* const srcStart = (const char*)src;
|
|
size_t remainingSrcSize = srcSize;
|
|
unsigned const compressWithinDst = (dstCapacity >= ZSTD_compressBound(srcSize)) ? nbChunks : (unsigned)(dstCapacity / ZSTD_compressBound(avgChunkSize)); /* presumes avgChunkSize >= 256 KB, which should be the case */
|
|
size_t frameStartPos = 0, dstBufferPos = 0;
|
|
XXH64_state_t xxh64;
|
|
assert(jobParams.nbThreads == 0);
|
|
assert(mtctx->cctxPool->totalCCtx == params.nbThreads);
|
|
|
|
DEBUGLOG(4, "nbChunks : %2u (chunkSize : %u bytes) ", nbChunks, (U32)avgChunkSize);
|
|
if (nbChunks==1) { /* fallback to single-thread mode */
|
|
ZSTD_CCtx* const cctx = mtctx->cctxPool->cctx[0];
|
|
if (cdict) return ZSTD_compress_usingCDict_advanced(cctx, dst, dstCapacity, src, srcSize, cdict, jobParams.fParams);
|
|
return ZSTD_compress_advanced_internal(cctx, dst, dstCapacity, src, srcSize, NULL, 0, jobParams);
|
|
}
|
|
assert(avgChunkSize >= 256 KB); /* condition for ZSTD_compressBound(A) + ZSTD_compressBound(B) <= ZSTD_compressBound(A+B), which is required for compressWithinDst */
|
|
ZSTDMT_setBufferSize(mtctx->bufPool, ZSTD_compressBound(avgChunkSize) );
|
|
XXH64_reset(&xxh64, 0);
|
|
|
|
if (nbChunks > mtctx->jobIDMask+1) { /* enlarge job table */
|
|
U32 nbJobs = nbChunks;
|
|
ZSTD_free(mtctx->jobs, mtctx->cMem);
|
|
mtctx->jobIDMask = 0;
|
|
mtctx->jobs = ZSTDMT_allocJobsTable(&nbJobs, mtctx->cMem);
|
|
if (mtctx->jobs==NULL) return ERROR(memory_allocation);
|
|
mtctx->jobIDMask = nbJobs - 1;
|
|
}
|
|
|
|
{ unsigned u;
|
|
for (u=0; u<nbChunks; u++) {
|
|
size_t const chunkSize = MIN(remainingSrcSize, avgChunkSize);
|
|
size_t const dstBufferCapacity = ZSTD_compressBound(chunkSize);
|
|
buffer_t const dstAsBuffer = { (char*)dst + dstBufferPos, dstBufferCapacity };
|
|
buffer_t const dstBuffer = u < compressWithinDst ? dstAsBuffer : g_nullBuffer;
|
|
size_t dictSize = u ? overlapSize : 0;
|
|
|
|
mtctx->jobs[u].src = g_nullBuffer;
|
|
mtctx->jobs[u].srcStart = srcStart + frameStartPos - dictSize;
|
|
mtctx->jobs[u].dictSize = dictSize;
|
|
mtctx->jobs[u].srcSize = chunkSize;
|
|
mtctx->jobs[u].cdict = mtctx->nextJobID==0 ? cdict : NULL;
|
|
mtctx->jobs[u].fullFrameSize = srcSize;
|
|
mtctx->jobs[u].params = jobParams;
|
|
/* do not calculate checksum within sections, but write it in header for first section */
|
|
if (u!=0) mtctx->jobs[u].params.fParams.checksumFlag = 0;
|
|
mtctx->jobs[u].dstBuff = dstBuffer;
|
|
mtctx->jobs[u].cctxPool = mtctx->cctxPool;
|
|
mtctx->jobs[u].bufPool = mtctx->bufPool;
|
|
mtctx->jobs[u].firstChunk = (u==0);
|
|
mtctx->jobs[u].lastChunk = (u==nbChunks-1);
|
|
mtctx->jobs[u].jobCompleted = 0;
|
|
mtctx->jobs[u].jobCompleted_mutex = &mtctx->jobCompleted_mutex;
|
|
mtctx->jobs[u].jobCompleted_cond = &mtctx->jobCompleted_cond;
|
|
|
|
if (params.fParams.checksumFlag) {
|
|
XXH64_update(&xxh64, srcStart + frameStartPos, chunkSize);
|
|
}
|
|
|
|
DEBUGLOG(5, "posting job %u (%u bytes)", u, (U32)chunkSize);
|
|
DEBUG_PRINTHEX(6, mtctx->jobs[u].srcStart, 12);
|
|
POOL_add(mtctx->factory, ZSTDMT_compressChunk, &mtctx->jobs[u]);
|
|
|
|
frameStartPos += chunkSize;
|
|
dstBufferPos += dstBufferCapacity;
|
|
remainingSrcSize -= chunkSize;
|
|
} }
|
|
|
|
/* collect result */
|
|
{ size_t error = 0, dstPos = 0;
|
|
unsigned chunkID;
|
|
for (chunkID=0; chunkID<nbChunks; chunkID++) {
|
|
DEBUGLOG(5, "waiting for chunk %u ", chunkID);
|
|
ZSTD_PTHREAD_MUTEX_LOCK(&mtctx->jobCompleted_mutex);
|
|
while (mtctx->jobs[chunkID].jobCompleted==0) {
|
|
DEBUGLOG(5, "waiting for jobCompleted signal from chunk %u", chunkID);
|
|
ZSTD_pthread_cond_wait(&mtctx->jobCompleted_cond, &mtctx->jobCompleted_mutex);
|
|
}
|
|
ZSTD_pthread_mutex_unlock(&mtctx->jobCompleted_mutex);
|
|
DEBUGLOG(5, "ready to write chunk %u ", chunkID);
|
|
|
|
mtctx->jobs[chunkID].srcStart = NULL;
|
|
{ size_t const cSize = mtctx->jobs[chunkID].cSize;
|
|
if (ZSTD_isError(cSize)) error = cSize;
|
|
if ((!error) && (dstPos + cSize > dstCapacity)) error = ERROR(dstSize_tooSmall);
|
|
if (chunkID) { /* note : chunk 0 is written directly at dst, which is correct position */
|
|
if (!error)
|
|
memmove((char*)dst + dstPos, mtctx->jobs[chunkID].dstBuff.start, cSize); /* may overlap when chunk compressed within dst */
|
|
if (chunkID >= compressWithinDst) { /* chunk compressed into its own buffer, which must be released */
|
|
DEBUGLOG(5, "releasing buffer %u>=%u", chunkID, compressWithinDst);
|
|
ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->jobs[chunkID].dstBuff);
|
|
} }
|
|
mtctx->jobs[chunkID].dstBuff = g_nullBuffer;
|
|
dstPos += cSize ;
|
|
}
|
|
} /* for (chunkID=0; chunkID<nbChunks; chunkID++) */
|
|
|
|
DEBUGLOG(4, "checksumFlag : %u ", params.fParams.checksumFlag);
|
|
if (params.fParams.checksumFlag) {
|
|
U32 const checksum = (U32)XXH64_digest(&xxh64);
|
|
if (dstPos + 4 > dstCapacity) {
|
|
error = ERROR(dstSize_tooSmall);
|
|
} else {
|
|
DEBUGLOG(4, "writing checksum : %08X \n", checksum);
|
|
MEM_writeLE32((char*)dst + dstPos, checksum);
|
|
dstPos += 4;
|
|
} }
|
|
|
|
if (!error) DEBUGLOG(4, "compressed size : %u ", (U32)dstPos);
|
|
return error ? error : dstPos;
|
|
}
|
|
}
|
|
|
|
size_t ZSTDMT_compress_advanced(ZSTDMT_CCtx* mtctx,
|
|
void* dst, size_t dstCapacity,
|
|
const void* src, size_t srcSize,
|
|
const ZSTD_CDict* cdict,
|
|
ZSTD_parameters const params,
|
|
unsigned overlapLog)
|
|
{
|
|
ZSTD_CCtx_params cctxParams = mtctx->params;
|
|
cctxParams.cParams = params.cParams;
|
|
cctxParams.fParams = params.fParams;
|
|
cctxParams.overlapSizeLog = overlapLog;
|
|
return ZSTDMT_compress_advanced_internal(mtctx,
|
|
dst, dstCapacity,
|
|
src, srcSize,
|
|
cdict, cctxParams);
|
|
}
|
|
|
|
|
|
size_t ZSTDMT_compressCCtx(ZSTDMT_CCtx* mtctx,
|
|
void* dst, size_t dstCapacity,
|
|
const void* src, size_t srcSize,
|
|
int compressionLevel)
|
|
{
|
|
U32 const overlapLog = (compressionLevel >= ZSTD_maxCLevel()) ? 9 : ZSTDMT_OVERLAPLOG_DEFAULT;
|
|
ZSTD_parameters params = ZSTD_getParams(compressionLevel, srcSize, 0);
|
|
params.fParams.contentSizeFlag = 1;
|
|
return ZSTDMT_compress_advanced(mtctx, dst, dstCapacity, src, srcSize, NULL, params, overlapLog);
|
|
}
|
|
|
|
|
|
/* ====================================== */
|
|
/* ======= Streaming API ======= */
|
|
/* ====================================== */
|
|
|
|
size_t ZSTDMT_initCStream_internal(
|
|
ZSTDMT_CCtx* zcs,
|
|
const void* dict, size_t dictSize, ZSTD_dictMode_e dictMode,
|
|
const ZSTD_CDict* cdict, ZSTD_CCtx_params params,
|
|
unsigned long long pledgedSrcSize)
|
|
{
|
|
DEBUGLOG(4, "ZSTDMT_initCStream_internal");
|
|
/* params are supposed to be fully validated at this point */
|
|
assert(!ZSTD_isError(ZSTD_checkCParams(params.cParams)));
|
|
assert(!((dict) && (cdict))); /* either dict or cdict, not both */
|
|
assert(zcs->cctxPool->totalCCtx == params.nbThreads);
|
|
|
|
if (params.nbThreads==1) {
|
|
ZSTD_CCtx_params const singleThreadParams = ZSTDMT_makeJobCCtxParams(params);
|
|
DEBUGLOG(4, "single thread mode");
|
|
assert(singleThreadParams.nbThreads == 0);
|
|
return ZSTD_initCStream_internal(zcs->cctxPool->cctx[0],
|
|
dict, dictSize, cdict,
|
|
singleThreadParams, pledgedSrcSize);
|
|
}
|
|
|
|
if (zcs->allJobsCompleted == 0) { /* previous compression not correctly finished */
|
|
ZSTDMT_waitForAllJobsCompleted(zcs);
|
|
ZSTDMT_releaseAllJobResources(zcs);
|
|
zcs->allJobsCompleted = 1;
|
|
}
|
|
|
|
zcs->params = params;
|
|
zcs->frameContentSize = pledgedSrcSize;
|
|
if (dict) {
|
|
DEBUGLOG(4,"cdictLocal: %08X", (U32)(size_t)zcs->cdictLocal);
|
|
ZSTD_freeCDict(zcs->cdictLocal);
|
|
zcs->cdictLocal = ZSTD_createCDict_advanced(dict, dictSize,
|
|
ZSTD_dlm_byCopy, dictMode, /* note : a loadPrefix becomes an internal CDict */
|
|
params.cParams, zcs->cMem);
|
|
zcs->cdict = zcs->cdictLocal;
|
|
if (zcs->cdictLocal == NULL) return ERROR(memory_allocation);
|
|
} else {
|
|
DEBUGLOG(4,"cdictLocal: %08X", (U32)(size_t)zcs->cdictLocal);
|
|
ZSTD_freeCDict(zcs->cdictLocal);
|
|
zcs->cdictLocal = NULL;
|
|
zcs->cdict = cdict;
|
|
}
|
|
|
|
zcs->targetDictSize = (params.overlapSizeLog==0) ? 0 : (size_t)1 << (params.cParams.windowLog - (9 - params.overlapSizeLog));
|
|
DEBUGLOG(4, "overlapLog : %u ", params.overlapSizeLog);
|
|
DEBUGLOG(4, "overlap Size : %u KB", (U32)(zcs->targetDictSize>>10));
|
|
zcs->targetSectionSize = params.jobSize ? params.jobSize : (size_t)1 << (params.cParams.windowLog + 2);
|
|
zcs->targetSectionSize = MAX(ZSTDMT_SECTION_SIZE_MIN, zcs->targetSectionSize);
|
|
zcs->targetSectionSize = MAX(zcs->targetDictSize, zcs->targetSectionSize);
|
|
DEBUGLOG(4, "Section Size : %u KB", (U32)(zcs->targetSectionSize>>10));
|
|
zcs->inBuffSize = zcs->targetDictSize + zcs->targetSectionSize;
|
|
ZSTDMT_setBufferSize(zcs->bufPool, MAX(zcs->inBuffSize, ZSTD_compressBound(zcs->targetSectionSize)) );
|
|
zcs->inBuff.buffer = g_nullBuffer;
|
|
zcs->dictSize = 0;
|
|
zcs->doneJobID = 0;
|
|
zcs->nextJobID = 0;
|
|
zcs->frameEnded = 0;
|
|
zcs->allJobsCompleted = 0;
|
|
if (params.fParams.checksumFlag) XXH64_reset(&zcs->xxhState, 0);
|
|
return 0;
|
|
}
|
|
|
|
size_t ZSTDMT_initCStream_advanced(ZSTDMT_CCtx* mtctx,
|
|
const void* dict, size_t dictSize,
|
|
ZSTD_parameters params,
|
|
unsigned long long pledgedSrcSize)
|
|
{
|
|
ZSTD_CCtx_params cctxParams = mtctx->params;
|
|
DEBUGLOG(5, "ZSTDMT_initCStream_advanced");
|
|
cctxParams.cParams = params.cParams;
|
|
cctxParams.fParams = params.fParams;
|
|
return ZSTDMT_initCStream_internal(mtctx, dict, dictSize, ZSTD_dm_auto, NULL,
|
|
cctxParams, pledgedSrcSize);
|
|
}
|
|
|
|
size_t ZSTDMT_initCStream_usingCDict(ZSTDMT_CCtx* mtctx,
|
|
const ZSTD_CDict* cdict,
|
|
ZSTD_frameParameters fParams,
|
|
unsigned long long pledgedSrcSize)
|
|
{
|
|
ZSTD_CCtx_params cctxParams = mtctx->params;
|
|
cctxParams.cParams = ZSTD_getCParamsFromCDict(cdict);
|
|
cctxParams.fParams = fParams;
|
|
if (cdict==NULL) return ERROR(dictionary_wrong); /* method incompatible with NULL cdict */
|
|
return ZSTDMT_initCStream_internal(mtctx, NULL, 0 /*dictSize*/, ZSTD_dm_auto, cdict,
|
|
cctxParams, pledgedSrcSize);
|
|
}
|
|
|
|
|
|
/* ZSTDMT_resetCStream() :
|
|
* pledgedSrcSize is optional and can be zero == unknown */
|
|
size_t ZSTDMT_resetCStream(ZSTDMT_CCtx* zcs, unsigned long long pledgedSrcSize)
|
|
{
|
|
if (zcs->params.nbThreads==1)
|
|
return ZSTD_resetCStream(zcs->cctxPool->cctx[0], pledgedSrcSize);
|
|
return ZSTDMT_initCStream_internal(zcs, NULL, 0, ZSTD_dm_auto, 0, zcs->params,
|
|
pledgedSrcSize);
|
|
}
|
|
|
|
size_t ZSTDMT_initCStream(ZSTDMT_CCtx* zcs, int compressionLevel) {
|
|
ZSTD_parameters const params = ZSTD_getParams(compressionLevel, 0, 0);
|
|
ZSTD_CCtx_params cctxParams = zcs->params;
|
|
cctxParams.cParams = params.cParams;
|
|
cctxParams.fParams = params.fParams;
|
|
return ZSTDMT_initCStream_internal(zcs, NULL, 0, ZSTD_dm_auto, NULL, cctxParams, 0);
|
|
}
|
|
|
|
|
|
static size_t ZSTDMT_createCompressionJob(ZSTDMT_CCtx* zcs, size_t srcSize, unsigned endFrame)
|
|
{
|
|
unsigned const jobID = zcs->nextJobID & zcs->jobIDMask;
|
|
|
|
DEBUGLOG(4, "preparing job %u to compress %u bytes with %u preload ",
|
|
zcs->nextJobID, (U32)srcSize, (U32)zcs->dictSize);
|
|
zcs->jobs[jobID].src = zcs->inBuff.buffer;
|
|
zcs->jobs[jobID].srcStart = zcs->inBuff.buffer.start;
|
|
zcs->jobs[jobID].srcSize = srcSize;
|
|
zcs->jobs[jobID].dictSize = zcs->dictSize;
|
|
assert(zcs->inBuff.filled >= srcSize + zcs->dictSize);
|
|
zcs->jobs[jobID].params = zcs->params;
|
|
/* do not calculate checksum within sections, but write it in header for first section */
|
|
if (zcs->nextJobID) zcs->jobs[jobID].params.fParams.checksumFlag = 0;
|
|
zcs->jobs[jobID].cdict = zcs->nextJobID==0 ? zcs->cdict : NULL;
|
|
zcs->jobs[jobID].fullFrameSize = zcs->frameContentSize;
|
|
zcs->jobs[jobID].dstBuff = g_nullBuffer;
|
|
zcs->jobs[jobID].cctxPool = zcs->cctxPool;
|
|
zcs->jobs[jobID].bufPool = zcs->bufPool;
|
|
zcs->jobs[jobID].firstChunk = (zcs->nextJobID==0);
|
|
zcs->jobs[jobID].lastChunk = endFrame;
|
|
zcs->jobs[jobID].jobCompleted = 0;
|
|
zcs->jobs[jobID].dstFlushed = 0;
|
|
zcs->jobs[jobID].jobCompleted_mutex = &zcs->jobCompleted_mutex;
|
|
zcs->jobs[jobID].jobCompleted_cond = &zcs->jobCompleted_cond;
|
|
|
|
if (zcs->params.fParams.checksumFlag)
|
|
XXH64_update(&zcs->xxhState, (const char*)zcs->inBuff.buffer.start + zcs->dictSize, srcSize);
|
|
|
|
/* get a new buffer for next input */
|
|
if (!endFrame) {
|
|
size_t const newDictSize = MIN(srcSize + zcs->dictSize, zcs->targetDictSize);
|
|
zcs->inBuff.buffer = ZSTDMT_getBuffer(zcs->bufPool);
|
|
if (zcs->inBuff.buffer.start == NULL) { /* not enough memory to allocate next input buffer */
|
|
zcs->jobs[jobID].jobCompleted = 1;
|
|
zcs->nextJobID++;
|
|
ZSTDMT_waitForAllJobsCompleted(zcs);
|
|
ZSTDMT_releaseAllJobResources(zcs);
|
|
return ERROR(memory_allocation);
|
|
}
|
|
zcs->inBuff.filled -= srcSize + zcs->dictSize - newDictSize;
|
|
memmove(zcs->inBuff.buffer.start,
|
|
(const char*)zcs->jobs[jobID].srcStart + zcs->dictSize + srcSize - newDictSize,
|
|
zcs->inBuff.filled);
|
|
zcs->dictSize = newDictSize;
|
|
} else { /* if (endFrame==1) */
|
|
zcs->inBuff.buffer = g_nullBuffer;
|
|
zcs->inBuff.filled = 0;
|
|
zcs->dictSize = 0;
|
|
zcs->frameEnded = 1;
|
|
if (zcs->nextJobID == 0) {
|
|
/* single chunk exception : checksum is calculated directly within worker thread */
|
|
zcs->params.fParams.checksumFlag = 0;
|
|
} }
|
|
|
|
DEBUGLOG(4, "posting job %u : %u bytes (end:%u) (note : doneJob = %u=>%u)",
|
|
zcs->nextJobID,
|
|
(U32)zcs->jobs[jobID].srcSize,
|
|
zcs->jobs[jobID].lastChunk,
|
|
zcs->doneJobID,
|
|
zcs->doneJobID & zcs->jobIDMask);
|
|
POOL_add(zcs->factory, ZSTDMT_compressChunk, &zcs->jobs[jobID]); /* this call is blocking when thread worker pool is exhausted */
|
|
zcs->nextJobID++;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* ZSTDMT_flushNextJob() :
|
|
* output : will be updated with amount of data flushed .
|
|
* blockToFlush : if >0, the function will block and wait if there is no data available to flush .
|
|
* @return : amount of data remaining within internal buffer, 1 if unknown but > 0, 0 if no more, or an error code */
|
|
static size_t ZSTDMT_flushNextJob(ZSTDMT_CCtx* zcs, ZSTD_outBuffer* output, unsigned blockToFlush)
|
|
{
|
|
unsigned const wJobID = zcs->doneJobID & zcs->jobIDMask;
|
|
if (zcs->doneJobID == zcs->nextJobID) return 0; /* all flushed ! */
|
|
ZSTD_PTHREAD_MUTEX_LOCK(&zcs->jobCompleted_mutex);
|
|
while (zcs->jobs[wJobID].jobCompleted==0) {
|
|
DEBUGLOG(5, "waiting for jobCompleted signal from job %u", zcs->doneJobID);
|
|
if (!blockToFlush) { ZSTD_pthread_mutex_unlock(&zcs->jobCompleted_mutex); return 0; } /* nothing ready to be flushed => skip */
|
|
ZSTD_pthread_cond_wait(&zcs->jobCompleted_cond, &zcs->jobCompleted_mutex); /* block when nothing available to flush */
|
|
}
|
|
ZSTD_pthread_mutex_unlock(&zcs->jobCompleted_mutex);
|
|
/* compression job completed : output can be flushed */
|
|
{ ZSTDMT_jobDescription job = zcs->jobs[wJobID];
|
|
if (!job.jobScanned) {
|
|
if (ZSTD_isError(job.cSize)) {
|
|
DEBUGLOG(5, "compression error detected ");
|
|
ZSTDMT_waitForAllJobsCompleted(zcs);
|
|
ZSTDMT_releaseAllJobResources(zcs);
|
|
return job.cSize;
|
|
}
|
|
DEBUGLOG(5, "zcs->params.fParams.checksumFlag : %u ", zcs->params.fParams.checksumFlag);
|
|
if (zcs->params.fParams.checksumFlag) {
|
|
if (zcs->frameEnded && (zcs->doneJobID+1 == zcs->nextJobID)) { /* write checksum at end of last section */
|
|
U32 const checksum = (U32)XXH64_digest(&zcs->xxhState);
|
|
DEBUGLOG(5, "writing checksum : %08X \n", checksum);
|
|
MEM_writeLE32((char*)job.dstBuff.start + job.cSize, checksum);
|
|
job.cSize += 4;
|
|
zcs->jobs[wJobID].cSize += 4;
|
|
} }
|
|
zcs->jobs[wJobID].jobScanned = 1;
|
|
}
|
|
{ size_t const toWrite = MIN(job.cSize - job.dstFlushed, output->size - output->pos);
|
|
DEBUGLOG(5, "Flushing %u bytes from job %u ", (U32)toWrite, zcs->doneJobID);
|
|
memcpy((char*)output->dst + output->pos, (const char*)job.dstBuff.start + job.dstFlushed, toWrite);
|
|
output->pos += toWrite;
|
|
job.dstFlushed += toWrite;
|
|
}
|
|
if (job.dstFlushed == job.cSize) { /* output buffer fully flushed => move to next one */
|
|
ZSTDMT_releaseBuffer(zcs->bufPool, job.dstBuff);
|
|
zcs->jobs[wJobID].dstBuff = g_nullBuffer;
|
|
zcs->jobs[wJobID].jobCompleted = 0;
|
|
zcs->doneJobID++;
|
|
} else {
|
|
zcs->jobs[wJobID].dstFlushed = job.dstFlushed;
|
|
}
|
|
/* return value : how many bytes left in buffer ; fake it to 1 if unknown but >0 */
|
|
if (job.cSize > job.dstFlushed) return (job.cSize - job.dstFlushed);
|
|
if (zcs->doneJobID < zcs->nextJobID) return 1; /* still some buffer to flush */
|
|
zcs->allJobsCompleted = zcs->frameEnded; /* frame completed and entirely flushed */
|
|
return 0; /* everything flushed */
|
|
} }
|
|
|
|
|
|
/** ZSTDMT_compressStream_generic() :
|
|
* internal use only - exposed to be invoked from zstd_compress.c
|
|
* assumption : output and input are valid (pos <= size)
|
|
* @return : minimum amount of data remaining to flush, 0 if none */
|
|
size_t ZSTDMT_compressStream_generic(ZSTDMT_CCtx* mtctx,
|
|
ZSTD_outBuffer* output,
|
|
ZSTD_inBuffer* input,
|
|
ZSTD_EndDirective endOp)
|
|
{
|
|
size_t const newJobThreshold = mtctx->dictSize + mtctx->targetSectionSize;
|
|
unsigned forwardInputProgress = 0;
|
|
assert(output->pos <= output->size);
|
|
assert(input->pos <= input->size);
|
|
if ((mtctx->frameEnded) && (endOp==ZSTD_e_continue)) {
|
|
/* current frame being ended. Only flush/end are allowed */
|
|
return ERROR(stage_wrong);
|
|
}
|
|
if (mtctx->params.nbThreads==1) { /* delegate to single-thread (synchronous) */
|
|
return ZSTD_compressStream_generic(mtctx->cctxPool->cctx[0], output, input, endOp);
|
|
}
|
|
|
|
/* single-pass shortcut (note : synchronous-mode) */
|
|
if ( (mtctx->nextJobID == 0) /* just started */
|
|
&& (mtctx->inBuff.filled == 0) /* nothing buffered */
|
|
&& (endOp == ZSTD_e_end) /* end order */
|
|
&& (output->size - output->pos >= ZSTD_compressBound(input->size - input->pos)) ) { /* enough room */
|
|
size_t const cSize = ZSTDMT_compress_advanced_internal(mtctx,
|
|
(char*)output->dst + output->pos, output->size - output->pos,
|
|
(const char*)input->src + input->pos, input->size - input->pos,
|
|
mtctx->cdict, mtctx->params);
|
|
if (ZSTD_isError(cSize)) return cSize;
|
|
input->pos = input->size;
|
|
output->pos += cSize;
|
|
ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->inBuff.buffer); /* was allocated in initStream */
|
|
mtctx->allJobsCompleted = 1;
|
|
mtctx->frameEnded = 1;
|
|
return 0;
|
|
}
|
|
|
|
/* fill input buffer */
|
|
if (input->size > input->pos) { /* support NULL input */
|
|
if (mtctx->inBuff.buffer.start == NULL) {
|
|
mtctx->inBuff.buffer = ZSTDMT_getBuffer(mtctx->bufPool); /* note : may fail, in which case, no forward input progress */
|
|
mtctx->inBuff.filled = 0;
|
|
}
|
|
if (mtctx->inBuff.buffer.start) {
|
|
size_t const toLoad = MIN(input->size - input->pos, mtctx->inBuffSize - mtctx->inBuff.filled);
|
|
DEBUGLOG(5, "inBuff:%08X; inBuffSize=%u; ToCopy=%u", (U32)(size_t)mtctx->inBuff.buffer.start, (U32)mtctx->inBuffSize, (U32)toLoad);
|
|
memcpy((char*)mtctx->inBuff.buffer.start + mtctx->inBuff.filled, (const char*)input->src + input->pos, toLoad);
|
|
input->pos += toLoad;
|
|
mtctx->inBuff.filled += toLoad;
|
|
forwardInputProgress = toLoad>0;
|
|
} }
|
|
|
|
if ( (mtctx->inBuff.filled >= newJobThreshold) /* filled enough : let's compress */
|
|
&& (mtctx->nextJobID <= mtctx->doneJobID + mtctx->jobIDMask) ) { /* avoid overwriting job round buffer */
|
|
CHECK_F( ZSTDMT_createCompressionJob(mtctx, mtctx->targetSectionSize, 0 /* endFrame */) );
|
|
}
|
|
|
|
/* check for potential compressed data ready to be flushed */
|
|
CHECK_F( ZSTDMT_flushNextJob(mtctx, output, !forwardInputProgress /* blockToFlush */) ); /* block if there was no forward input progress */
|
|
|
|
if (input->pos < input->size) /* input not consumed : do not flush yet */
|
|
endOp = ZSTD_e_continue;
|
|
|
|
switch(endOp)
|
|
{
|
|
case ZSTD_e_flush:
|
|
return ZSTDMT_flushStream(mtctx, output);
|
|
case ZSTD_e_end:
|
|
return ZSTDMT_endStream(mtctx, output);
|
|
case ZSTD_e_continue:
|
|
return 1;
|
|
default:
|
|
return ERROR(GENERIC); /* invalid endDirective */
|
|
}
|
|
}
|
|
|
|
|
|
size_t ZSTDMT_compressStream(ZSTDMT_CCtx* zcs, ZSTD_outBuffer* output, ZSTD_inBuffer* input)
|
|
{
|
|
CHECK_F( ZSTDMT_compressStream_generic(zcs, output, input, ZSTD_e_continue) );
|
|
|
|
/* recommended next input size : fill current input buffer */
|
|
return zcs->inBuffSize - zcs->inBuff.filled; /* note : could be zero when input buffer is fully filled and no more availability to create new job */
|
|
}
|
|
|
|
|
|
static size_t ZSTDMT_flushStream_internal(ZSTDMT_CCtx* zcs, ZSTD_outBuffer* output, unsigned endFrame)
|
|
{
|
|
size_t const srcSize = zcs->inBuff.filled - zcs->dictSize;
|
|
|
|
if ( ((srcSize > 0) || (endFrame && !zcs->frameEnded))
|
|
&& (zcs->nextJobID <= zcs->doneJobID + zcs->jobIDMask) ) {
|
|
CHECK_F( ZSTDMT_createCompressionJob(zcs, srcSize, endFrame) );
|
|
}
|
|
|
|
/* check if there is any data available to flush */
|
|
return ZSTDMT_flushNextJob(zcs, output, 1 /* blockToFlush */);
|
|
}
|
|
|
|
|
|
size_t ZSTDMT_flushStream(ZSTDMT_CCtx* zcs, ZSTD_outBuffer* output)
|
|
{
|
|
DEBUGLOG(5, "ZSTDMT_flushStream");
|
|
if (zcs->params.nbThreads==1)
|
|
return ZSTD_flushStream(zcs->cctxPool->cctx[0], output);
|
|
return ZSTDMT_flushStream_internal(zcs, output, 0 /* endFrame */);
|
|
}
|
|
|
|
size_t ZSTDMT_endStream(ZSTDMT_CCtx* zcs, ZSTD_outBuffer* output)
|
|
{
|
|
DEBUGLOG(4, "ZSTDMT_endStream");
|
|
if (zcs->params.nbThreads==1)
|
|
return ZSTD_endStream(zcs->cctxPool->cctx[0], output);
|
|
return ZSTDMT_flushStream_internal(zcs, output, 1 /* endFrame */);
|
|
}
|