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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/command_buffer/service/scheduler_sequence.h"
#include "base/task/single_thread_task_runner.h"
#include "gpu/command_buffer/service/scheduler.h"
#if DCHECK_IS_ON()
#include "third_party/abseil-cpp/absl/base/attributes.h"
#endif
namespace gpu {
namespace {
#if DCHECK_IS_ON()
ABSL_CONST_INIT thread_local bool schedule_task_disallowed = false;
#endif // DCHECK_IS_ON()
} // namespace
ScopedAllowScheduleGpuTask::~ScopedAllowScheduleGpuTask() = default;
ScopedAllowScheduleGpuTask::ScopedAllowScheduleGpuTask()
#if DCHECK_IS_ON()
: resetter_(&schedule_task_disallowed, false)
#endif // DCHECK_IS_ON()
{
}
// static
void SchedulerSequence::DefaultDisallowScheduleTaskOnCurrentThread() {
#if DCHECK_IS_ON()
schedule_task_disallowed = true;
#endif
}
SchedulerSequence::SchedulerSequence(
Scheduler* scheduler,
scoped_refptr<base::SingleThreadTaskRunner> task_runner,
bool target_thread_is_always_available)
: SingleTaskSequence(),
scheduler_(scheduler),
sequence_id_(scheduler->CreateSequence(SchedulingPriority::kHigh,
std::move(task_runner))),
target_thread_is_always_available_(target_thread_is_always_available) {}
// Note: this drops tasks not executed yet.
SchedulerSequence::~SchedulerSequence() {
scheduler_->DestroySequence(sequence_id_);
}
// SingleTaskSequence implementation.
SequenceId SchedulerSequence::GetSequenceId() {
return sequence_id_;
}
bool SchedulerSequence::ShouldYield() {
return scheduler_->ShouldYield(sequence_id_);
}
void SchedulerSequence::ScheduleTask(base::OnceClosure task,
std::vector<SyncToken> sync_token_fences,
ReportingCallback report_callback) {
// If your CL is failing this DCHECK, then that means you are probably calling
// ScheduleGpuTask at a point that cannot be supported by Android Webview.
// Consider using ScheduleOrRetainGpuTask which will delay (not reorder) the
// task in Android Webview until the next DrawAndSwap.
if (!target_thread_is_always_available_) {
#if DCHECK_IS_ON()
DCHECK(!schedule_task_disallowed)
<< "If your CL is failing this DCHECK, then that means you are "
"probably calling ScheduleGpuTask at a point that cannot be "
"supported by Android Webview. Consider using "
"ScheduleOrRetainGpuTask, which will delay (not reorder) the task "
"in Android Webview until the next DrawAndSwap.";
#endif
}
ScheduleOrRetainTask(std::move(task), std::move(sync_token_fences),
std::move(report_callback));
}
void SchedulerSequence::ScheduleOrRetainTask(
base::OnceClosure task,
std::vector<gpu::SyncToken> sync_token_fences,
ReportingCallback report_callback) {
scheduler_->ScheduleTask(Scheduler::Task(sequence_id_, std::move(task),
std::move(sync_token_fences),
std::move(report_callback)));
}
void SchedulerSequence::ContinueTask(base::OnceClosure task) {
scheduler_->ContinueTask(sequence_id_, std::move(task));
}
} // namespace gpu
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