143 lines
5 KiB
C++
143 lines
5 KiB
C++
/**************************************************************************/
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/* file_access_windows_pipe.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#ifdef WINDOWS_ENABLED
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#include "file_access_windows_pipe.h"
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#include "core/os/os.h"
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#include "core/string/print_string.h"
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Error FileAccessWindowsPipe::open_existing(HANDLE p_rfd, HANDLE p_wfd, bool p_blocking) {
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// Open pipe using handles created by CreatePipe(rfd, wfd, NULL, 4096) call in the OS.execute_with_pipe.
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_close();
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path_src = String();
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ERR_FAIL_COND_V_MSG(fd[0] != 0 || fd[1] != 0, ERR_ALREADY_IN_USE, "Pipe is already in use.");
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fd[0] = p_rfd;
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fd[1] = p_wfd;
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if (!p_blocking) {
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DWORD mode = PIPE_READMODE_BYTE | PIPE_NOWAIT;
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SetNamedPipeHandleState(fd[0], &mode, nullptr, nullptr);
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SetNamedPipeHandleState(fd[1], &mode, nullptr, nullptr);
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}
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last_error = OK;
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return OK;
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}
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Error FileAccessWindowsPipe::open_internal(const String &p_path, int p_mode_flags) {
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_close();
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path_src = p_path;
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ERR_FAIL_COND_V_MSG(fd[0] != 0 || fd[1] != 0, ERR_ALREADY_IN_USE, "Pipe is already in use.");
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path = String("\\\\.\\pipe\\LOCAL\\") + p_path.replace("pipe://", "").replace("/", "_");
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HANDLE h = CreateFileW((LPCWSTR)path.utf16().get_data(), GENERIC_READ | GENERIC_WRITE, 0, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
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if (h == INVALID_HANDLE_VALUE) {
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h = CreateNamedPipeW((LPCWSTR)path.utf16().get_data(), PIPE_ACCESS_DUPLEX, PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_NOWAIT, 1, 4096, 4096, 0, nullptr);
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if (h == INVALID_HANDLE_VALUE) {
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last_error = ERR_FILE_CANT_OPEN;
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return last_error;
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}
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ConnectNamedPipe(h, NULL);
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}
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fd[0] = h;
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fd[1] = h;
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last_error = OK;
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return OK;
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}
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void FileAccessWindowsPipe::_close() {
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if (fd[0] == 0) {
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return;
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}
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if (fd[1] != fd[0]) {
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CloseHandle(fd[1]);
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}
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CloseHandle(fd[0]);
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fd[0] = 0;
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fd[1] = 0;
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}
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bool FileAccessWindowsPipe::is_open() const {
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return (fd[0] != 0 || fd[1] != 0);
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}
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String FileAccessWindowsPipe::get_path() const {
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return path_src;
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}
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String FileAccessWindowsPipe::get_path_absolute() const {
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return path_src;
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}
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uint64_t FileAccessWindowsPipe::get_buffer(uint8_t *p_dst, uint64_t p_length) const {
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ERR_FAIL_COND_V_MSG(fd[0] == 0, -1, "Pipe must be opened before use.");
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ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
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DWORD read = 0;
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if (!ReadFile(fd[0], p_dst, p_length, &read, nullptr) || read != p_length) {
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last_error = ERR_FILE_CANT_READ;
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} else {
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last_error = OK;
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}
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return read;
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}
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Error FileAccessWindowsPipe::get_error() const {
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return last_error;
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}
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void FileAccessWindowsPipe::store_buffer(const uint8_t *p_src, uint64_t p_length) {
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ERR_FAIL_COND_MSG(fd[1] == 0, "Pipe must be opened before use.");
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ERR_FAIL_COND(!p_src && p_length > 0);
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DWORD read = -1;
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bool ok = WriteFile(fd[1], p_src, p_length, &read, nullptr);
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if (!ok || read != p_length) {
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last_error = ERR_FILE_CANT_WRITE;
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} else {
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last_error = OK;
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}
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}
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void FileAccessWindowsPipe::close() {
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_close();
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}
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FileAccessWindowsPipe::~FileAccessWindowsPipe() {
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_close();
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}
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#endif // WINDOWS_ENABLED
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