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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/task/thread_pool/pooled_sequenced_task_runner.h"
#include "base/message_loop/message_pump.h"
#include "base/sequence_token.h"
#include "base/task/default_delayed_task_handle_delegate.h"
namespace base::internal {
PooledSequencedTaskRunner::PooledSequencedTaskRunner(
const TaskTraits& traits,
PooledTaskRunnerDelegate* pooled_task_runner_delegate)
: pooled_task_runner_delegate_(pooled_task_runner_delegate),
sequence_(MakeRefCounted<Sequence>(traits,
this,
TaskSourceExecutionMode::kSequenced)) {
}
PooledSequencedTaskRunner::~PooledSequencedTaskRunner() = default;
bool PooledSequencedTaskRunner::PostDelayedTask(const Location& from_here,
OnceClosure closure,
TimeDelta delay) {
if (!PooledTaskRunnerDelegate::MatchesCurrentDelegate(
pooled_task_runner_delegate_)) {
return false;
}
Task task(from_here, std::move(closure), TimeTicks::Now(), delay,
MessagePump::GetLeewayIgnoringThreadOverride());
// Post the task as part of |sequence_|.
return pooled_task_runner_delegate_->PostTaskWithSequence(std::move(task),
sequence_);
}
bool PooledSequencedTaskRunner::PostDelayedTaskAt(
subtle::PostDelayedTaskPassKey,
const Location& from_here,
OnceClosure closure,
TimeTicks delayed_run_time,
subtle::DelayPolicy delay_policy) {
if (!PooledTaskRunnerDelegate::MatchesCurrentDelegate(
pooled_task_runner_delegate_)) {
return false;
}
Task task(from_here, std::move(closure), TimeTicks::Now(), delayed_run_time,
MessagePump::GetLeewayIgnoringThreadOverride(), delay_policy);
// Post the task as part of |sequence_|.
return pooled_task_runner_delegate_->PostTaskWithSequence(std::move(task),
sequence_);
}
bool PooledSequencedTaskRunner::PostNonNestableDelayedTask(
const Location& from_here,
OnceClosure closure,
TimeDelta delay) {
// Tasks are never nested within the thread pool.
return PostDelayedTask(from_here, std::move(closure), delay);
}
bool PooledSequencedTaskRunner::RunsTasksInCurrentSequence() const {
return sequence_->token() == SequenceToken::GetForCurrentThread();
}
void PooledSequencedTaskRunner::UpdatePriority(TaskPriority priority) {
pooled_task_runner_delegate_->UpdatePriority(sequence_, priority);
}
} // namespace base::internal
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