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85 lines
1.7 KiB
C++
85 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=8 et :
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef IPC_FencerUtils_h
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#define IPC_FencerUtils_h
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#include "ipc/IPCMessageUtils.h"
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#include "nsRefPtr.h" // for nsRefPtr
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namespace mozilla {
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namespace layers {
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class FenceHandle {
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public:
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class FdObj {
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FdObj)
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friend class FenceHandle;
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public:
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FdObj()
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: mFd(-1) {}
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explicit FdObj(int aFd)
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: mFd(aFd) {}
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int GetAndResetFd()
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{
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int fd = mFd;
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mFd = -1;
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return fd;
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}
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private:
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virtual ~FdObj() {
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if (mFd != -1) {
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close(mFd);
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}
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}
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int mFd;
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};
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FenceHandle();
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explicit FenceHandle(FdObj* aFdObj);
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bool operator==(const FenceHandle& aOther) const {
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return mFence.get() == aOther.mFence.get();
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}
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bool IsValid() const
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{
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return (mFence->mFd != -1);
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}
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void Merge(const FenceHandle& aFenceHandle);
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void TransferToAnotherFenceHandle(FenceHandle& aFenceHandle);
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already_AddRefed<FdObj> GetAndResetFdObj();
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already_AddRefed<FdObj> GetDupFdObj();
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private:
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nsRefPtr<FdObj> mFence;
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};
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} // namespace layers
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} // namespace mozilla
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namespace IPC {
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template <>
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struct ParamTraits<mozilla::layers::FenceHandle> {
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typedef mozilla::layers::FenceHandle paramType;
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static void Write(Message* aMsg, const paramType& aParam);
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static bool Read(const Message* aMsg, void** aIter, paramType* aResult);
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};
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} // namespace IPC
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#endif // IPC_FencerUtils_h
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