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146 lines
3.5 KiB
146 lines
3.5 KiB
/*
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* Copyright (C) 2021 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_NDEBUG 0
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#define LOG_TAG "C2FenceFactory"
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#include <utils/Log.h>
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#include <C2FenceFactory.h>
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#include <C2SurfaceSyncObj.h>
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class C2Fence::Impl {
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public:
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virtual c2_status_t wait(c2_nsecs_t timeoutNs) = 0;
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virtual bool valid() const = 0;
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virtual bool ready() const = 0;
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virtual int fd() const = 0;
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virtual bool isHW() const = 0;
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virtual ~Impl() = default;
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Impl() = default;
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};
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c2_status_t C2Fence::wait(c2_nsecs_t timeoutNs) {
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if (mImpl) {
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return mImpl->wait(timeoutNs);
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}
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// null fence is always signalled.
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return C2_OK;
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}
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bool C2Fence::valid() const {
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if (mImpl) {
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return mImpl->valid();
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}
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// null fence is always valid.
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return true;
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}
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bool C2Fence::ready() const {
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if (mImpl) {
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return mImpl->ready();
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}
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// null fence is always signalled.
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return true;
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}
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int C2Fence::fd() const {
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if (mImpl) {
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return mImpl->fd();
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}
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// null fence does not have fd.
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return -1;
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}
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bool C2Fence::isHW() const {
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if (mImpl) {
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return mImpl->isHW();
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}
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return false;
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}
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/**
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* Fence implementation for C2BufferQueueBlockPool based block allocation.
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* The implementation supports all C2Fence interface except fd().
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*/
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class _C2FenceFactory::SurfaceFenceImpl: public C2Fence::Impl {
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public:
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virtual c2_status_t wait(c2_nsecs_t timeoutNs) {
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if (mPtr) {
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return mPtr->waitForChange(mWaitId, timeoutNs);
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}
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return C2_OK;
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}
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virtual bool valid() const {
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return mPtr;
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}
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virtual bool ready() const {
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uint32_t status;
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if (mPtr) {
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mPtr->lock();
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status = mPtr->getWaitIdLocked();
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mPtr->unlock();
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return status != mWaitId;
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}
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return true;
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}
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virtual int fd() const {
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// does not support fd, since this is shared mem and futex based
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return -1;
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}
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virtual bool isHW() const {
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return false;
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}
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virtual ~SurfaceFenceImpl() {};
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SurfaceFenceImpl(std::shared_ptr<C2SurfaceSyncMemory> syncMem, uint32_t waitId) :
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mSyncMem(syncMem),
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mPtr(syncMem ? syncMem->mem() : nullptr),
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mWaitId(syncMem ? waitId : 0) {}
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private:
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const std::shared_ptr<const C2SurfaceSyncMemory> mSyncMem; // This is for life-cycle guarantee
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C2SyncVariables *const mPtr;
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const uint32_t mWaitId;
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};
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C2Fence::C2Fence(std::shared_ptr<Impl> impl) : mImpl(impl) {}
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C2Fence _C2FenceFactory::CreateSurfaceFence(
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std::shared_ptr<C2SurfaceSyncMemory> syncMem,
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uint32_t waitId) {
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if (syncMem) {
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C2Fence::Impl *p
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= new _C2FenceFactory::SurfaceFenceImpl(syncMem, waitId);
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if (p->valid()) {
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return C2Fence(std::shared_ptr<C2Fence::Impl>(p));
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} else {
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delete p;
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}
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}
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return C2Fence();
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}
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