1 // Copyright 2016 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 #ifndef BASE_MEMORY_SHARED_MEMORY_HELPER_H_ 6 #define BASE_MEMORY_SHARED_MEMORY_HELPER_H_ 7 8 #include "base/memory/shared_memory.h" 9 #include "build/build_config.h" 10 11 #include <fcntl.h> 12 13 namespace base { 14 15 #if !defined(OS_ANDROID) 16 // Makes a temporary file, fdopens it, and then unlinks it. |fd| is populated 17 // with the opened fd. |readonly_fd| is populated with the opened fd if 18 // options.share_read_only is true. |path| is populated with the location of 19 // the file before it was unlinked. 20 // Returns false if there's an unhandled failure. 21 bool CreateAnonymousSharedMemory(const SharedMemoryCreateOptions& options, 22 ScopedFD* fd, 23 ScopedFD* readonly_fd, 24 FilePath* path); 25 26 // Takes the outputs of CreateAnonymousSharedMemory and maps them properly to 27 // |mapped_file| or |readonly_mapped_file|, depending on which one is populated. 28 bool PrepareMapFile(ScopedFD fd, 29 ScopedFD readonly_fd, 30 int* mapped_file, 31 int* readonly_mapped_file); 32 #endif // !defined(OS_ANDROID) 33 34 } // namespace base 35 36 #endif // BASE_MEMORY_SHARED_MEMORY_HELPER_H_ 37