// Copyright (c) 2012 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "ppapi/native_client/src/trusted/plugin/temporary_file.h" #include "native_client/src/include/portability_io.h" #include "native_client/src/shared/platform/nacl_check.h" #include "native_client/src/trusted/service_runtime/include/sys/stat.h" #include "ppapi/cpp/core.h" #include "ppapi/cpp/instance.h" #include "ppapi/cpp/module.h" #include "ppapi/c/private/pp_file_handle.h" #include "ppapi/native_client/src/trusted/plugin/plugin.h" #include "ppapi/native_client/src/trusted/plugin/utility.h" namespace plugin { TempFile::TempFile(Plugin* plugin) : plugin_(plugin), internal_handle_(PP_kInvalidFileHandle) { } TempFile::~TempFile() { } int32_t TempFile::Open(bool writeable) { // TODO(teravest): Clean up this Open() behavior; this is really confusing as // written. if (internal_handle_ == PP_kInvalidFileHandle) { internal_handle_ = plugin_->nacl_interface()->CreateTemporaryFile(plugin_->pp_instance()); } if (internal_handle_ == PP_kInvalidFileHandle) { PLUGIN_PRINTF(("TempFile::Open failed w/ PP_kInvalidFileHandle\n")); return PP_ERROR_FAILED; } #if NACL_WINDOWS HANDLE handle = internal_handle_; //////// Now try the posix view. int rdwr_flag = writeable ? _O_RDWR : _O_RDONLY; int32_t posix_desc = _open_osfhandle(reinterpret_cast<intptr_t>(handle), rdwr_flag | _O_BINARY | _O_TEMPORARY | _O_SHORT_LIVED ); if (posix_desc == -1) { PLUGIN_PRINTF(("TempFile::Open failed to convert HANDLE to posix\n")); // Close the Windows HANDLE if it can't be converted. CloseHandle(handle); } int32_t fd = posix_desc; #else int32_t fd = internal_handle_; #endif if (fd < 0) { PLUGIN_PRINTF(("TempFile::Open failed\n")); return PP_ERROR_FAILED; } // dup the fd to make allow making separate read and write wrappers. int32_t read_fd = DUP(fd); if (read_fd == NACL_NO_FILE_DESC) { PLUGIN_PRINTF(("TempFile::Open DUP failed\n")); return PP_ERROR_FAILED; } if (writeable) { write_wrapper_.reset( plugin_->wrapper_factory()->MakeFileDesc(fd, O_RDWR)); } read_wrapper_.reset( plugin_->wrapper_factory()->MakeFileDesc(read_fd, O_RDONLY)); return PP_OK; } bool TempFile::Reset() { PLUGIN_PRINTF(("TempFile::Reset\n")); // Use the read_wrapper_ to reset the file pos. The write_wrapper_ is also // backed by the same file, so it should also reset. CHECK(read_wrapper_.get() != NULL); nacl_off64_t newpos = read_wrapper_->Seek(0, SEEK_SET); return newpos == 0; } PP_FileHandle TempFile::TakeFileHandle() { PP_FileHandle to_return = internal_handle_; internal_handle_ = PP_kInvalidFileHandle; read_wrapper_.release(); write_wrapper_.release(); return to_return; } } // namespace plugin