1 // Copyright 2022 The Chromium Authors 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_PLATFORM_SHARED_MEMORY_MAPPER_H_ 6 #define BASE_MEMORY_PLATFORM_SHARED_MEMORY_MAPPER_H_ 7 8 #include "base/base_export.h" 9 #include "base/memory/shared_memory_mapper.h" 10 11 namespace base { 12 13 // Default implementation of the SharedMemoryMapper interface. Implements the 14 // platform-specific logic for mapping shared memory regions into the virtual 15 // address space of the process. 16 class PlatformSharedMemoryMapper : public SharedMemoryMapper { 17 public: 18 absl::optional<span<uint8_t>> Map(subtle::PlatformSharedMemoryHandle handle, 19 bool write_allowed, 20 uint64_t offset, 21 size_t size) override; 22 23 void Unmap(span<uint8_t> mapping) override; 24 }; 25 26 } // namespace base 27 28 #endif // BASE_MEMORY_PLATFORM_SHARED_MEMORY_MAPPER_H_ 29