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/*
* 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.
*/
#define LOG_TAG "Fence"
#define ATRACE_TAG ATRACE_TAG_GRAPHICS
//#define LOG_NDEBUG 0
#include <sync/sync.h>
#include <ui/Fence.h>
#include <unistd.h>
#include <utils/Log.h>
#include <utils/Trace.h>
namespace android {
const sp<Fence> Fence::NO_FENCE = sp<Fence>();
Fence::Fence() :
mFenceFd(-1) {
}
Fence::Fence(int fenceFd) :
mFenceFd(fenceFd) {
}
Fence::~Fence() {
if (mFenceFd != -1) {
close(mFenceFd);
}
}
int Fence::wait(unsigned int timeout) {
ATRACE_CALL();
if (mFenceFd == -1) {
return NO_ERROR;
}
return sync_wait(mFenceFd, timeout);
}
int Fence::waitForever(unsigned int warningTimeout, const char* logname) {
ATRACE_CALL();
if (mFenceFd == -1) {
return NO_ERROR;
}
int err = sync_wait(mFenceFd, warningTimeout);
if (err == -ETIME) {
ALOGE("%s: fence %d didn't signal in %u ms", logname, mFenceFd,
warningTimeout);
err = sync_wait(mFenceFd, TIMEOUT_NEVER);
}
return err;
}
sp<Fence> Fence::merge(const String8& name, const sp<Fence>& f1,
const sp<Fence>& f2) {
ATRACE_CALL();
int result = sync_merge(name.string(), f1->mFenceFd, f2->mFenceFd);
if (result == -1) {
status_t err = -errno;
ALOGE("merge: sync_merge(\"%s\", %d, %d) returned an error: %s (%d)",
name.string(), f1->mFenceFd, f2->mFenceFd,
strerror(-err), err);
return NO_FENCE;
}
return sp<Fence>(new Fence(result));
}
int Fence::dup() const {
if (mFenceFd == -1) {
return -1;
}
return ::dup(mFenceFd);
}
size_t Fence::getFlattenedSize() const {
return 0;
}
size_t Fence::getFdCount() const {
return 1;
}
status_t Fence::flatten(void* buffer, size_t size, int fds[],
size_t count) const {
if (size != 0 || count != 1) {
return BAD_VALUE;
}
fds[0] = mFenceFd;
return NO_ERROR;
}
status_t Fence::unflatten(void const* buffer, size_t size, int fds[],
size_t count) {
if (size != 0 || count != 1) {
return BAD_VALUE;
}
if (mFenceFd != -1) {
// Don't unflatten if we already have a valid fd.
return INVALID_OPERATION;
}
mFenceFd = fds[0];
return NO_ERROR;
}
} // namespace android
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