6100b4bd33
Release notes: - https://github.com/facebook/zstd/releases/tag/v1.5.3 - https://github.com/facebook/zstd/releases/tag/v1.5.4 - https://github.com/facebook/zstd/releases/tag/v1.5.5
113 lines
4.6 KiB
C++
113 lines
4.6 KiB
C++
/*
|
|
* Copyright (c) Meta Platforms, Inc. and affiliates.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under both the BSD-style license (found in the
|
|
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
|
|
* in the COPYING file in the root directory of this source tree).
|
|
* You may select, at your option, one of the above-listed licenses.
|
|
*/
|
|
|
|
#ifndef ZSTDMT_COMPRESS_H
|
|
#define ZSTDMT_COMPRESS_H
|
|
|
|
#if defined (__cplusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/* Note : This is an internal API.
|
|
* These APIs used to be exposed with ZSTDLIB_API,
|
|
* because it used to be the only way to invoke MT compression.
|
|
* Now, you must use ZSTD_compress2 and ZSTD_compressStream2() instead.
|
|
*
|
|
* This API requires ZSTD_MULTITHREAD to be defined during compilation,
|
|
* otherwise ZSTDMT_createCCtx*() will fail.
|
|
*/
|
|
|
|
/* === Dependencies === */
|
|
#include "../common/zstd_deps.h" /* size_t */
|
|
#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_parameters */
|
|
#include "../zstd.h" /* ZSTD_inBuffer, ZSTD_outBuffer, ZSTDLIB_API */
|
|
|
|
|
|
/* === Constants === */
|
|
#ifndef ZSTDMT_NBWORKERS_MAX /* a different value can be selected at compile time */
|
|
# define ZSTDMT_NBWORKERS_MAX ((sizeof(void*)==4) /*32-bit*/ ? 64 : 256)
|
|
#endif
|
|
#ifndef ZSTDMT_JOBSIZE_MIN /* a different value can be selected at compile time */
|
|
# define ZSTDMT_JOBSIZE_MIN (512 KB)
|
|
#endif
|
|
#define ZSTDMT_JOBLOG_MAX (MEM_32bits() ? 29 : 30)
|
|
#define ZSTDMT_JOBSIZE_MAX (MEM_32bits() ? (512 MB) : (1024 MB))
|
|
|
|
|
|
/* ========================================================
|
|
* === Private interface, for use by ZSTD_compress.c ===
|
|
* === Not exposed in libzstd. Never invoke directly ===
|
|
* ======================================================== */
|
|
|
|
/* === Memory management === */
|
|
typedef struct ZSTDMT_CCtx_s ZSTDMT_CCtx;
|
|
/* Requires ZSTD_MULTITHREAD to be defined during compilation, otherwise it will return NULL. */
|
|
ZSTDMT_CCtx* ZSTDMT_createCCtx_advanced(unsigned nbWorkers,
|
|
ZSTD_customMem cMem,
|
|
ZSTD_threadPool *pool);
|
|
size_t ZSTDMT_freeCCtx(ZSTDMT_CCtx* mtctx);
|
|
|
|
size_t ZSTDMT_sizeof_CCtx(ZSTDMT_CCtx* mtctx);
|
|
|
|
/* === Streaming functions === */
|
|
|
|
size_t ZSTDMT_nextInputSizeHint(const ZSTDMT_CCtx* mtctx);
|
|
|
|
/*! ZSTDMT_initCStream_internal() :
|
|
* Private use only. Init streaming operation.
|
|
* expects params to be valid.
|
|
* must receive dict, or cdict, or none, but not both.
|
|
* mtctx can be freshly constructed or reused from a prior compression.
|
|
* If mtctx is reused, memory allocations from the prior compression may not be freed,
|
|
* even if they are not needed for the current compression.
|
|
* @return : 0, or an error code */
|
|
size_t ZSTDMT_initCStream_internal(ZSTDMT_CCtx* mtctx,
|
|
const void* dict, size_t dictSize, ZSTD_dictContentType_e dictContentType,
|
|
const ZSTD_CDict* cdict,
|
|
ZSTD_CCtx_params params, unsigned long long pledgedSrcSize);
|
|
|
|
/*! ZSTDMT_compressStream_generic() :
|
|
* Combines ZSTDMT_compressStream() with optional ZSTDMT_flushStream() or ZSTDMT_endStream()
|
|
* depending on flush directive.
|
|
* @return : minimum amount of data still to be flushed
|
|
* 0 if fully flushed
|
|
* or an error code
|
|
* note : needs to be init using any ZSTD_initCStream*() variant */
|
|
size_t ZSTDMT_compressStream_generic(ZSTDMT_CCtx* mtctx,
|
|
ZSTD_outBuffer* output,
|
|
ZSTD_inBuffer* input,
|
|
ZSTD_EndDirective endOp);
|
|
|
|
/*! ZSTDMT_toFlushNow()
|
|
* Tell how many bytes are ready to be flushed immediately.
|
|
* Probe the oldest active job (not yet entirely flushed) and check its output buffer.
|
|
* If return 0, it means there is no active job,
|
|
* or, it means oldest job is still active, but everything produced has been flushed so far,
|
|
* therefore flushing is limited by speed of oldest job. */
|
|
size_t ZSTDMT_toFlushNow(ZSTDMT_CCtx* mtctx);
|
|
|
|
/*! ZSTDMT_updateCParams_whileCompressing() :
|
|
* Updates only a selected set of compression parameters, to remain compatible with current frame.
|
|
* New parameters will be applied to next compression job. */
|
|
void ZSTDMT_updateCParams_whileCompressing(ZSTDMT_CCtx* mtctx, const ZSTD_CCtx_params* cctxParams);
|
|
|
|
/*! ZSTDMT_getFrameProgression():
|
|
* tells how much data has been consumed (input) and produced (output) for current frame.
|
|
* able to count progression inside worker threads.
|
|
*/
|
|
ZSTD_frameProgression ZSTDMT_getFrameProgression(ZSTDMT_CCtx* mtctx);
|
|
|
|
|
|
#if defined (__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* ZSTDMT_COMPRESS_H */
|