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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"
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
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