124 lines
2.8 KiB
C++
124 lines
2.8 KiB
C++
/*
|
|
* Copyright (C) 2008 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.
|
|
*/
|
|
|
|
#define LOG_TAG "SurfaceFlingerSynchro"
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <binder/IPCThreadState.h>
|
|
#include <utils/Log.h>
|
|
|
|
#include <private/ui/SurfaceFlingerSynchro.h>
|
|
|
|
namespace android {
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
SurfaceFlingerSynchro::Barrier::Barrier()
|
|
: state(CLOSED) {
|
|
}
|
|
|
|
SurfaceFlingerSynchro::Barrier::~Barrier() {
|
|
}
|
|
|
|
void SurfaceFlingerSynchro::Barrier::open() {
|
|
asm volatile ("":::"memory");
|
|
Mutex::Autolock _l(lock);
|
|
state = OPENED;
|
|
cv.broadcast();
|
|
}
|
|
|
|
void SurfaceFlingerSynchro::Barrier::close() {
|
|
Mutex::Autolock _l(lock);
|
|
state = CLOSED;
|
|
}
|
|
|
|
void SurfaceFlingerSynchro::Barrier::waitAndClose()
|
|
{
|
|
Mutex::Autolock _l(lock);
|
|
while (state == CLOSED) {
|
|
// we're about to wait, flush the binder command buffer
|
|
IPCThreadState::self()->flushCommands();
|
|
cv.wait(lock);
|
|
}
|
|
state = CLOSED;
|
|
}
|
|
|
|
status_t SurfaceFlingerSynchro::Barrier::waitAndClose(nsecs_t timeout)
|
|
{
|
|
Mutex::Autolock _l(lock);
|
|
while (state == CLOSED) {
|
|
// we're about to wait, flush the binder command buffer
|
|
IPCThreadState::self()->flushCommands();
|
|
int err = cv.waitRelative(lock, timeout);
|
|
if (err != 0)
|
|
return err;
|
|
}
|
|
state = CLOSED;
|
|
return NO_ERROR;
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
SurfaceFlingerSynchro::SurfaceFlingerSynchro(const sp<ISurfaceComposer>& flinger)
|
|
: mSurfaceComposer(flinger)
|
|
{
|
|
}
|
|
|
|
SurfaceFlingerSynchro::SurfaceFlingerSynchro()
|
|
{
|
|
}
|
|
|
|
SurfaceFlingerSynchro::~SurfaceFlingerSynchro()
|
|
{
|
|
}
|
|
|
|
status_t SurfaceFlingerSynchro::signal()
|
|
{
|
|
mSurfaceComposer->signal();
|
|
return NO_ERROR;
|
|
}
|
|
|
|
status_t SurfaceFlingerSynchro::wait()
|
|
{
|
|
mBarrier.waitAndClose();
|
|
return NO_ERROR;
|
|
}
|
|
|
|
status_t SurfaceFlingerSynchro::wait(nsecs_t timeout)
|
|
{
|
|
if (timeout == 0)
|
|
return SurfaceFlingerSynchro::wait();
|
|
return mBarrier.waitAndClose(timeout);
|
|
}
|
|
|
|
void SurfaceFlingerSynchro::open()
|
|
{
|
|
mBarrier.open();
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
}; // namespace android
|
|
|