initial commit, 4.5 stable

drivers/windows/file_access_windows_pipe.cpp

@@ -0,0 +1,153 @@
+/**************************************************************************/
+/*  file_access_windows_pipe.cpp                                          */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifdef WINDOWS_ENABLED
+
+#include "file_access_windows_pipe.h"
+
+#include "core/os/os.h"
+#include "core/string/print_string.h"
+
+Error FileAccessWindowsPipe::open_existing(HANDLE p_rfd, HANDLE p_wfd, bool p_blocking) {
+	// Open pipe using handles created by CreatePipe(rfd, wfd, NULL, 4096) call in the OS.execute_with_pipe.
+	_close();
+
+	path_src = String();
+	ERR_FAIL_COND_V_MSG(fd[0] != nullptr || fd[1] != nullptr, ERR_ALREADY_IN_USE, "Pipe is already in use.");
+	fd[0] = p_rfd;
+	fd[1] = p_wfd;
+
+	if (!p_blocking) {
+		DWORD mode = PIPE_READMODE_BYTE | PIPE_NOWAIT;
+		SetNamedPipeHandleState(fd[0], &mode, nullptr, nullptr);
+		SetNamedPipeHandleState(fd[1], &mode, nullptr, nullptr);
+	}
+
+	last_error = OK;
+	return OK;
+}
+
+Error FileAccessWindowsPipe::open_internal(const String &p_path, int p_mode_flags) {
+	_close();
+
+	path_src = p_path;
+	ERR_FAIL_COND_V_MSG(fd[0] != nullptr || fd[1] != nullptr, ERR_ALREADY_IN_USE, "Pipe is already in use.");
+
+	path = String("\\\\.\\pipe\\LOCAL\\") + p_path.replace("pipe://", "").replace_char('/', '_');
+
+	HANDLE h = CreateFileW((LPCWSTR)path.utf16().get_data(), GENERIC_READ | GENERIC_WRITE, 0, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
+	if (h == INVALID_HANDLE_VALUE) {
+		h = CreateNamedPipeW((LPCWSTR)path.utf16().get_data(), PIPE_ACCESS_DUPLEX, PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_NOWAIT, 1, 4096, 4096, 0, nullptr);
+		if (h == INVALID_HANDLE_VALUE) {
+			last_error = ERR_FILE_CANT_OPEN;
+			return last_error;
+		}
+		ConnectNamedPipe(h, nullptr);
+	}
+	fd[0] = h;
+	fd[1] = h;
+
+	last_error = OK;
+	return OK;
+}
+
+void FileAccessWindowsPipe::_close() {
+	if (fd[0] == nullptr) {
+		return;
+	}
+	if (fd[1] != fd[0]) {
+		CloseHandle(fd[1]);
+	}
+	CloseHandle(fd[0]);
+	fd[0] = nullptr;
+	fd[1] = nullptr;
+}
+
+bool FileAccessWindowsPipe::is_open() const {
+	return (fd[0] != nullptr || fd[1] != nullptr);
+}
+
+String FileAccessWindowsPipe::get_path() const {
+	return path_src;
+}
+
+String FileAccessWindowsPipe::get_path_absolute() const {
+	return path_src;
+}
+
+uint64_t FileAccessWindowsPipe::get_length() const {
+	ERR_FAIL_COND_V_MSG(fd[0] == nullptr, -1, "Pipe must be opened before use.");
+
+	DWORD buf_rem = 0;
+	ERR_FAIL_COND_V(!PeekNamedPipe(fd[0], nullptr, 0, nullptr, &buf_rem, nullptr), 0);
+	return buf_rem;
+}
+
+uint64_t FileAccessWindowsPipe::get_buffer(uint8_t *p_dst, uint64_t p_length) const {
+	ERR_FAIL_COND_V_MSG(fd[0] == nullptr, -1, "Pipe must be opened before use.");
+	ERR_FAIL_COND_V(!p_dst && p_length > 0, -1);
+
+	DWORD read = 0;
+	if (!ReadFile(fd[0], p_dst, p_length, &read, nullptr) || read != p_length) {
+		last_error = ERR_FILE_CANT_READ;
+	} else {
+		last_error = OK;
+	}
+	return read;
+}
+
+Error FileAccessWindowsPipe::get_error() const {
+	return last_error;
+}
+
+bool FileAccessWindowsPipe::store_buffer(const uint8_t *p_src, uint64_t p_length) {
+	ERR_FAIL_COND_V_MSG(fd[1] == nullptr, false, "Pipe must be opened before use.");
+	ERR_FAIL_COND_V(!p_src && p_length > 0, false);
+
+	DWORD read = -1;
+	bool ok = WriteFile(fd[1], p_src, p_length, &read, nullptr);
+	if (!ok || read != p_length) {
+		last_error = ERR_FILE_CANT_WRITE;
+		return false;
+	} else {
+		last_error = OK;
+		return true;
+	}
+}
+
+void FileAccessWindowsPipe::close() {
+	_close();
+}
+
+FileAccessWindowsPipe::~FileAccessWindowsPipe() {
+	_close();
+}
+
+#endif // WINDOWS_ENABLED