1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "ppapi/native_client/src/trusted/plugin/temporary_file.h" 6 7#include "native_client/src/include/portability_io.h" 8#include "native_client/src/shared/platform/nacl_check.h" 9#include "native_client/src/trusted/service_runtime/include/sys/stat.h" 10 11#include "ppapi/cpp/core.h" 12#include "ppapi/cpp/instance.h" 13#include "ppapi/cpp/module.h" 14#include "ppapi/c/private/pp_file_handle.h" 15 16#include "ppapi/native_client/src/trusted/plugin/plugin.h" 17#include "ppapi/native_client/src/trusted/plugin/utility.h" 18 19namespace plugin { 20 21TempFile::TempFile(Plugin* plugin, PP_FileHandle handle) 22 : plugin_(plugin), 23 internal_handle_(handle) { } 24 25TempFile::~TempFile() { } 26 27int32_t TempFile::Open(bool writeable) { 28 if (internal_handle_ == PP_kInvalidFileHandle) 29 return PP_ERROR_FAILED; 30 31#if NACL_WINDOWS 32 HANDLE handle = internal_handle_; 33 34 //////// Now try the posix view. 35 int rdwr_flag = writeable ? _O_RDWR : _O_RDONLY; 36 int32_t posix_desc = _open_osfhandle(reinterpret_cast<intptr_t>(handle), 37 rdwr_flag | _O_BINARY 38 | _O_TEMPORARY | _O_SHORT_LIVED ); 39 40 // Close the Windows HANDLE if it can't be converted. 41 if (posix_desc == -1) { 42 PLUGIN_PRINTF(("TempFile::Open failed to convert HANDLE to posix\n")); 43 CloseHandle(handle); 44 } 45 int32_t fd = posix_desc; 46#else 47 int32_t fd = internal_handle_; 48#endif 49 50 if (fd < 0) 51 return PP_ERROR_FAILED; 52 53 // dup the fd to make allow making separate read and write wrappers. 54 int32_t read_fd = DUP(fd); 55 if (read_fd == NACL_NO_FILE_DESC) 56 return PP_ERROR_FAILED; 57 58 if (writeable) { 59 write_wrapper_.reset( 60 plugin_->wrapper_factory()->MakeFileDesc(fd, O_RDWR)); 61 } 62 63 read_wrapper_.reset( 64 plugin_->wrapper_factory()->MakeFileDesc(read_fd, O_RDONLY)); 65 return PP_OK; 66} 67 68bool TempFile::Reset() { 69 // Use the read_wrapper_ to reset the file pos. The write_wrapper_ is also 70 // backed by the same file, so it should also reset. 71 CHECK(read_wrapper_.get() != NULL); 72 nacl_off64_t newpos = read_wrapper_->Seek(0, SEEK_SET); 73 return newpos == 0; 74} 75 76PP_FileHandle TempFile::TakeFileHandle() { 77 PP_FileHandle to_return = internal_handle_; 78 internal_handle_ = PP_kInvalidFileHandle; 79 read_wrapper_.release(); 80 write_wrapper_.release(); 81 return to_return; 82} 83 84} // namespace plugin 85