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54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
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// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/memory/shared_memory_handle.h"
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#include "base/logging.h"
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#include "base/unguessable_token.h"
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namespace base {
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SharedMemoryHandle::SharedMemoryHandle() {}
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SharedMemoryHandle::SharedMemoryHandle(HANDLE h,
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size_t size,
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const base::UnguessableToken& guid)
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: handle_(h), guid_(guid), size_(size) {}
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void SharedMemoryHandle::Close() const {
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DCHECK(handle_ != nullptr);
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::CloseHandle(handle_);
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}
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bool SharedMemoryHandle::IsValid() const {
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return handle_ != nullptr;
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}
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SharedMemoryHandle SharedMemoryHandle::Duplicate() const {
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HANDLE duped_handle;
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ProcessHandle process = GetCurrentProcess();
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BOOL success = ::DuplicateHandle(process, handle_, process, &duped_handle, 0,
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FALSE, DUPLICATE_SAME_ACCESS);
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if (!success)
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return SharedMemoryHandle();
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base::SharedMemoryHandle handle(duped_handle, GetSize(), GetGUID());
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handle.SetOwnershipPassesToIPC(true);
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return handle;
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}
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HANDLE SharedMemoryHandle::GetHandle() const {
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return handle_;
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}
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void SharedMemoryHandle::SetOwnershipPassesToIPC(bool ownership_passes) {
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ownership_passes_to_ipc_ = ownership_passes;
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}
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bool SharedMemoryHandle::OwnershipPassesToIPC() const {
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return ownership_passes_to_ipc_;
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}
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} // namespace base
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