| // Copyright 2015 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 "base/memory/shared_memory_handle.h" |
| |
| #include "base/logging.h" |
| |
| namespace base { |
| |
| SharedMemoryHandle::SharedMemoryHandle() |
| : handle_(nullptr), pid_(kNullProcessId), ownership_passes_to_ipc_(false) {} |
| |
| SharedMemoryHandle::SharedMemoryHandle(HANDLE h, base::ProcessId pid) |
| : handle_(h), pid_(pid), ownership_passes_to_ipc_(false) {} |
| |
| SharedMemoryHandle::SharedMemoryHandle(const SharedMemoryHandle& handle) |
| : handle_(handle.handle_), |
| pid_(handle.pid_), |
| ownership_passes_to_ipc_(handle.ownership_passes_to_ipc_) {} |
| |
| SharedMemoryHandle& SharedMemoryHandle::operator=( |
| const SharedMemoryHandle& handle) { |
| if (this == &handle) |
| return *this; |
| |
| handle_ = handle.handle_; |
| pid_ = handle.pid_; |
| ownership_passes_to_ipc_ = handle.ownership_passes_to_ipc_; |
| return *this; |
| } |
| |
| bool SharedMemoryHandle::operator==(const SharedMemoryHandle& handle) const { |
| // Invalid handles are always equal. |
| if (!IsValid() && !handle.IsValid()) |
| return true; |
| |
| return handle_ == handle.handle_ && pid_ == handle.pid_; |
| } |
| |
| bool SharedMemoryHandle::operator!=(const SharedMemoryHandle& handle) const { |
| return !(*this == handle); |
| } |
| |
| void SharedMemoryHandle::Close() const { |
| DCHECK(handle_ != nullptr); |
| DCHECK(BelongsToCurrentProcess()); |
| ::CloseHandle(handle_); |
| } |
| |
| bool SharedMemoryHandle::IsValid() const { |
| return handle_ != nullptr; |
| } |
| |
| bool SharedMemoryHandle::BelongsToCurrentProcess() const { |
| return pid_ == base::GetCurrentProcId(); |
| } |
| |
| bool SharedMemoryHandle::NeedsBrokering() const { |
| return BelongsToCurrentProcess(); |
| } |
| |
| HANDLE SharedMemoryHandle::GetHandle() const { |
| return handle_; |
| } |
| |
| base::ProcessId SharedMemoryHandle::GetPID() const { |
| return pid_; |
| } |
| |
| void SharedMemoryHandle::SetOwnershipPassesToIPC(bool ownership_passes) { |
| ownership_passes_to_ipc_ = ownership_passes; |
| } |
| |
| bool SharedMemoryHandle::OwnershipPassesToIPC() const { |
| return ownership_passes_to_ipc_; |
| } |
| |
| } // namespace base |