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// 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"
#include "base/unguessable_token.h"
namespace base {
SharedMemoryHandle::SharedMemoryHandle() {}
SharedMemoryHandle::SharedMemoryHandle(HANDLE h,
size_t size,
const base::UnguessableToken& guid)
: handle_(h), guid_(guid), size_(size) {}
void SharedMemoryHandle::Close() const {
DCHECK(handle_ != nullptr);
::CloseHandle(handle_);
}
bool SharedMemoryHandle::IsValid() const {
return handle_ != nullptr;
}
SharedMemoryHandle SharedMemoryHandle::Duplicate() const {
HANDLE duped_handle;
ProcessHandle process = GetCurrentProcess();
BOOL success = ::DuplicateHandle(process, handle_, process, &duped_handle, 0,
FALSE, DUPLICATE_SAME_ACCESS);
if (!success)
return SharedMemoryHandle();
base::SharedMemoryHandle handle(duped_handle, GetSize(), GetGUID());
handle.SetOwnershipPassesToIPC(true);
return handle;
}
HANDLE SharedMemoryHandle::GetHandle() const {
return handle_;
}
void SharedMemoryHandle::SetOwnershipPassesToIPC(bool ownership_passes) {
ownership_passes_to_ipc_ = ownership_passes;
}
bool SharedMemoryHandle::OwnershipPassesToIPC() const {
return ownership_passes_to_ipc_;
}
} // namespace base
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