ef19414bd8
After a HWC set, each SurfaceFlinger Layer retrieves the release fence HWC returned and gives it to the layer's SurfaceTexture. The SurfaceTexture accumulates the fences into a merged fence until the next updateTexImage, then passes the merged fence to the BufferQueue in releaseBuffer. In a follow-on change, BufferQueue will return the fence along with the buffer slot in dequeueBuffer. For now, dequeueBuffer waits for the fence to signal before returning. The releaseFence default value for BufferQueue::releaseBuffer() is temporary to avoid transient build breaks with a multi-project checkin. It'll disappear in the next change. Change-Id: Iaa9a0d5775235585d9cbf453d3a64623d08013d9
96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
/*
|
|
* Copyright (C) 2012 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef ANDROID_FENCE_H
|
|
#define ANDROID_FENCE_H
|
|
|
|
#include <stdint.h>
|
|
#include <limits.h>
|
|
#include <sys/types.h>
|
|
|
|
#include <ui/ANativeObjectBase.h>
|
|
#include <ui/PixelFormat.h>
|
|
#include <ui/Rect.h>
|
|
#include <utils/Flattenable.h>
|
|
#include <utils/String8.h>
|
|
|
|
struct ANativeWindowBuffer;
|
|
|
|
namespace android {
|
|
|
|
// ===========================================================================
|
|
// Fence
|
|
// ===========================================================================
|
|
|
|
class Fence
|
|
: public LightRefBase<Fence>, public Flattenable
|
|
{
|
|
public:
|
|
static const sp<Fence> NO_FENCE;
|
|
|
|
// Construct a new Fence object with an invalid file descriptor. This
|
|
// should be done when the Fence object will be set up by unflattening
|
|
// serialized data.
|
|
Fence();
|
|
|
|
// Construct a new Fence object to manage a given fence file descriptor.
|
|
// When the new Fence object is destructed the file descriptor will be
|
|
// closed.
|
|
Fence(int fenceFd);
|
|
|
|
// wait waits for up to timeout milliseconds for the fence to signal. If
|
|
// the fence signals then NO_ERROR is returned. If the timeout expires
|
|
// before the fence signals then -ETIME is returned. A timeout of
|
|
// TIMEOUT_NEVER may be used to indicate that the call should wait
|
|
// indefinitely for the fence to signal.
|
|
int wait(unsigned int timeout);
|
|
|
|
// TIMEOUT_NEVER may be passed to the wait method to indicate that it
|
|
// should wait indefinitely for the fence to signal.
|
|
enum { TIMEOUT_NEVER = UINT_MAX };
|
|
|
|
// merge combines two Fence objects, creating a new Fence object that
|
|
// becomes signaled when both f1 and f2 are signaled (even if f1 or f2 is
|
|
// destroyed before it becomes signaled). The name argument specifies the
|
|
// human-readable name to associated with the new Fence object.
|
|
static sp<Fence> merge(const String8& name, const sp<Fence>& f1,
|
|
const sp<Fence>& f2);
|
|
|
|
// Flattenable interface
|
|
size_t getFlattenedSize() const;
|
|
size_t getFdCount() const;
|
|
status_t flatten(void* buffer, size_t size,
|
|
int fds[], size_t count) const;
|
|
status_t unflatten(void const* buffer, size_t size,
|
|
int fds[], size_t count);
|
|
|
|
private:
|
|
// Only allow instantiation using ref counting.
|
|
friend class LightRefBase<Fence>;
|
|
virtual ~Fence();
|
|
|
|
// Disallow copying
|
|
Fence(const Fence& rhs);
|
|
Fence& operator = (const Fence& rhs);
|
|
const Fence& operator = (const Fence& rhs) const;
|
|
|
|
int mFenceFd;
|
|
};
|
|
|
|
}; // namespace android
|
|
|
|
#endif // ANDROID_FENCE_H
|