gecko-dev/gfx/layers/ipc/FenceUtils.h
Ethan Lin 0e78b95a1c Bug 1155498 - Use FdObj to replace FenceHandle's android fence. r=sotaro
--HG--
extra : rebase_source : df49b5e482064e30338a19748371bb70550cdd13
2015-05-17 07:21:00 +02:00

85 lines
1.7 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* 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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef IPC_FencerUtils_h
#define IPC_FencerUtils_h
#include "ipc/IPCMessageUtils.h"
#include "nsRefPtr.h" // for nsRefPtr
namespace mozilla {
namespace layers {
class FenceHandle {
public:
class FdObj {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FdObj)
friend class FenceHandle;
public:
FdObj()
: mFd(-1) {}
explicit FdObj(int aFd)
: mFd(aFd) {}
int GetAndResetFd()
{
int fd = mFd;
mFd = -1;
return fd;
}
private:
virtual ~FdObj() {
if (mFd != -1) {
close(mFd);
}
}
int mFd;
};
FenceHandle();
explicit FenceHandle(FdObj* aFdObj);
bool operator==(const FenceHandle& aOther) const {
return mFence.get() == aOther.mFence.get();
}
bool IsValid() const
{
return (mFence->mFd != -1);
}
void Merge(const FenceHandle& aFenceHandle);
void TransferToAnotherFenceHandle(FenceHandle& aFenceHandle);
already_AddRefed<FdObj> GetAndResetFdObj();
already_AddRefed<FdObj> GetDupFdObj();
private:
nsRefPtr<FdObj> mFence;
};
} // namespace layers
} // namespace mozilla
namespace IPC {
template <>
struct ParamTraits<mozilla::layers::FenceHandle> {
typedef mozilla::layers::FenceHandle paramType;
static void Write(Message* aMsg, const paramType& aParam);
static bool Read(const Message* aMsg, void** aIter, paramType* aResult);
};
} // namespace IPC
#endif // IPC_FencerUtils_h