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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#ifndef _include_gfx_ipc_FileHandleWrapper_h__
#define _include_gfx_ipc_FileHandleWrapper_h__
#include "mozilla/UniquePtrExtensions.h"
#include "nsISupportsImpl.h"
namespace mozilla {
namespace ipc {
template <typename T>
struct IPDLParamTraits;
} // namespace ipc
namespace gfx {
//
// A class for sharing file handle or shared handle among multiple clients.
//
// The file handles or the shared handles consume system resources. The class
// could reduce the number of shared handles in a process.
//
class FileHandleWrapper {
friend struct mozilla::ipc::IPDLParamTraits<gfx::FileHandleWrapper*>;
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FileHandleWrapper);
explicit FileHandleWrapper(mozilla::UniqueFileHandle&& aHandle);
mozilla::detail::FileHandleType GetHandle();
mozilla::UniqueFileHandle ClonePlatformHandle();
protected:
~FileHandleWrapper();
const mozilla::UniqueFileHandle mHandle;
};
struct FenceInfo {
FenceInfo() = default;
FenceInfo(FileHandleWrapper* aFenceHandle, uint64_t aFenceValue)
: mFenceHandle(aFenceHandle), mFenceValue(aFenceValue) {}
bool operator==(const FenceInfo& aOther) const {
return mFenceHandle == aOther.mFenceHandle &&
mFenceValue == aOther.mFenceValue;
}
RefPtr<FileHandleWrapper> mFenceHandle;
uint64_t mFenceValue = 0;
};
} // namespace gfx
} // namespace mozilla
#endif // _include_gfx_ipc_FileHandleWrapper_h__