зеркало из https://github.com/mozilla/gecko-dev.git
98 строки
2.3 KiB
C++
98 строки
2.3 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_GonkNativeHandle_h
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#define IPC_GonkNativeHandle_h
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#ifdef MOZ_WIDGET_GONK
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#include <cutils/native_handle.h>
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#endif
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#include "mozilla/RefPtr.h" // for RefPtr
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#include "nsISupportsImpl.h"
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namespace mozilla {
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namespace layers {
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#ifdef MOZ_WIDGET_GONK
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// GonkNativeHandle wraps android's native_handle_t and is used to support
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// android's sideband stream.
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// The sideband stream is a device-specific mechanism for passing buffers
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// to hwcomposer. It is used to render TV streams and DRM protected streams.
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// The native_handle_t represents device-specific kernel objects on android.
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class GonkNativeHandle {
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public:
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class NhObj {
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(NhObj)
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friend class GonkNativeHandle;
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public:
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NhObj()
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: mHandle(nullptr) {}
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explicit NhObj(native_handle_t* aHandle)
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: mHandle(aHandle) {}
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native_handle_t* GetAndResetNativeHandle()
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{
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native_handle_t* handle = mHandle;
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mHandle = nullptr;
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return handle;
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}
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private:
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virtual ~NhObj() {
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if (mHandle) {
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native_handle_close(mHandle);
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native_handle_delete(mHandle);
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}
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}
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native_handle_t* mHandle;
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};
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GonkNativeHandle();
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explicit GonkNativeHandle(NhObj* aNhObj);
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bool operator==(const GonkNativeHandle& aOther) const {
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return mNhObj.get() == aOther.mNhObj.get();
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}
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bool IsValid() const
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{
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return mNhObj && mNhObj->mHandle;
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}
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void TransferToAnother(GonkNativeHandle& aHandle);
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already_AddRefed<NhObj> GetAndResetNhObj();
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already_AddRefed<NhObj> GetDupNhObj();
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static already_AddRefed<NhObj> CreateDupNhObj(native_handle_t* aHandle);
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// Return non owning handle.
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native_handle_t* GetRawNativeHandle() const
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{
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if (mNhObj) {
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return mNhObj->mHandle;
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}
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return nullptr;
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}
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private:
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RefPtr<NhObj> mNhObj;
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};
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#else
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struct GonkNativeHandle {
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bool operator==(const GonkNativeHandle&) const { return false; }
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};
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#endif
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} // namespace layers
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} // namespace mozilla
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#endif // IPC_GonkNativeHandle_h
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