124 lines
2.8 KiB
C++
124 lines
2.8 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "SurfaceFlingerSynchro"
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <limits.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <utils/IPCThreadState.h>
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#include <utils/Log.h>
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#include <private/ui/SurfaceFlingerSynchro.h>
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namespace android {
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// ---------------------------------------------------------------------------
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SurfaceFlingerSynchro::Barrier::Barrier()
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: state(CLOSED) {
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}
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SurfaceFlingerSynchro::Barrier::~Barrier() {
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}
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void SurfaceFlingerSynchro::Barrier::open() {
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asm volatile ("":::"memory");
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Mutex::Autolock _l(lock);
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state = OPENED;
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cv.broadcast();
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}
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void SurfaceFlingerSynchro::Barrier::close() {
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Mutex::Autolock _l(lock);
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state = CLOSED;
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}
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void SurfaceFlingerSynchro::Barrier::waitAndClose()
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{
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Mutex::Autolock _l(lock);
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while (state == CLOSED) {
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// we're about to wait, flush the binder command buffer
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IPCThreadState::self()->flushCommands();
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cv.wait(lock);
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}
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state = CLOSED;
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}
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status_t SurfaceFlingerSynchro::Barrier::waitAndClose(nsecs_t timeout)
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{
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Mutex::Autolock _l(lock);
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while (state == CLOSED) {
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// we're about to wait, flush the binder command buffer
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IPCThreadState::self()->flushCommands();
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int err = cv.waitRelative(lock, timeout);
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if (err != 0)
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return err;
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}
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state = CLOSED;
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return NO_ERROR;
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}
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// ---------------------------------------------------------------------------
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SurfaceFlingerSynchro::SurfaceFlingerSynchro(const sp<ISurfaceComposer>& flinger)
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: mSurfaceComposer(flinger)
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{
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}
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SurfaceFlingerSynchro::SurfaceFlingerSynchro()
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{
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}
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SurfaceFlingerSynchro::~SurfaceFlingerSynchro()
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{
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}
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status_t SurfaceFlingerSynchro::signal()
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{
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mSurfaceComposer->signal();
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return NO_ERROR;
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}
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status_t SurfaceFlingerSynchro::wait()
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{
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mBarrier.waitAndClose();
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return NO_ERROR;
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}
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status_t SurfaceFlingerSynchro::wait(nsecs_t timeout)
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{
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if (timeout == 0)
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return SurfaceFlingerSynchro::wait();
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return mBarrier.waitAndClose(timeout);
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}
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void SurfaceFlingerSynchro::open()
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{
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mBarrier.open();
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}
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// ---------------------------------------------------------------------------
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}; // namespace android
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