mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-06 00:55:37 +00:00
58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "FlushableTaskQueue.h"
|
|
|
|
namespace mozilla {
|
|
|
|
void
|
|
FlushableTaskQueue::Flush()
|
|
{
|
|
MonitorAutoLock mon(mQueueMonitor);
|
|
AutoSetFlushing autoFlush(this);
|
|
FlushLocked();
|
|
AwaitIdleLocked();
|
|
}
|
|
|
|
nsresult
|
|
FlushableTaskQueue::FlushAndDispatch(already_AddRefed<nsIRunnable> aRunnable)
|
|
{
|
|
nsCOMPtr<nsIRunnable> r = aRunnable;
|
|
{
|
|
MonitorAutoLock mon(mQueueMonitor);
|
|
AutoSetFlushing autoFlush(this);
|
|
FlushLocked();
|
|
nsresult rv = DispatchLocked(/* passed by ref */r, IgnoreFlushing, AssertDispatchSuccess);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
AwaitIdleLocked();
|
|
}
|
|
// If the ownership of |r| is not transferred in DispatchLocked() due to
|
|
// dispatch failure, it will be deleted here outside the lock. We do so
|
|
// since the destructor of the runnable might access TaskQueue and result
|
|
// in deadlocks.
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
FlushableTaskQueue::FlushLocked()
|
|
{
|
|
// Make sure there are no tasks for this queue waiting in the caller's tail
|
|
// dispatcher.
|
|
MOZ_ASSERT_IF(AbstractThread::GetCurrent(),
|
|
!AbstractThread::GetCurrent()->TailDispatcher().HasTasksFor(this));
|
|
|
|
mQueueMonitor.AssertCurrentThreadOwns();
|
|
MOZ_ASSERT(mIsFlushing);
|
|
|
|
// Clear the tasks. If this strikes you as awful, stop using a
|
|
// FlushableTaskQueue.
|
|
while (!mTasks.empty()) {
|
|
mTasks.pop();
|
|
}
|
|
}
|
|
|
|
} // namespace mozilla
|