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/* 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 "mozilla/WidgetTraceEvent.h"
#include "mozilla/StaticPtr.h"
#include "nsThreadUtils.h"
#include <mozilla/CondVar.h>
#include <mozilla/Mutex.h>
using mozilla::CondVar;
using mozilla::Mutex;
using mozilla::MutexAutoLock;
namespace mozilla {
class TracerRunnable : public Runnable {
public:
TracerRunnable() {
mTracerLock = new Mutex("TracerRunnable");
mTracerCondVar = new CondVar(*mTracerLock, "TracerRunnable");
mMainThread = do_GetMainThread();
}
~TracerRunnable() {
delete mTracerCondVar;
delete mTracerLock;
mTracerLock = nullptr;
mTracerCondVar = nullptr;
}
virtual nsresult Run() {
MutexAutoLock lock(*mTracerLock);
mHasRun = true;
mTracerCondVar->Notify();
return NS_OK;
}
bool Fire() {
if (!mTracerLock || !mTracerCondVar) {
return false;
}
MutexAutoLock lock(*mTracerLock);
mHasRun = false;
mMainThread->Dispatch(this, NS_DISPATCH_NORMAL);
while (!mHasRun) {
mTracerCondVar->Wait();
}
return true;
}
void Signal() {
MutexAutoLock lock(*mTracerLock);
mHasRun = true;
mTracerCondVar->Notify();
}
private:
Mutex* mTracerLock;
CondVar* mTracerCondVar;
bool mHasRun;
nsCOMPtr<nsIThread> mMainThread;
};
StaticRefPtr<TracerRunnable> sTracerRunnable;
bool InitWidgetTracing()
{
if (!sTracerRunnable) {
sTracerRunnable = new TracerRunnable();
}
return true;
}
void CleanUpWidgetTracing()
{
sTracerRunnable = nullptr;
}
bool FireAndWaitForTracerEvent()
{
if (sTracerRunnable) {
return sTracerRunnable->Fire();
}
return false;
}
void SignalTracerThread()
{
if (sTracerRunnable) {
return sTracerRunnable->Signal();
}
}
} // namespace mozilla
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