86 lines
2.3 KiB
Plaintext
86 lines
2.3 KiB
Plaintext
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <Cocoa/Cocoa.h>
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#include "CustomCocoaEvents.h"
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#include <Foundation/NSAutoreleasePool.h>
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#include <mozilla/CondVar.h>
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#include <mozilla/Mutex.h>
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#include "mozilla/WidgetTraceEvent.h"
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using mozilla::CondVar;
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using mozilla::Mutex;
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using mozilla::MutexAutoLock;
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namespace {
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Mutex* sMutex = NULL;
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CondVar* sCondVar = NULL;
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bool sTracerProcessed = false;
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} // namespace
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namespace mozilla {
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bool InitWidgetTracing()
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{
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sMutex = new Mutex("Event tracer thread mutex");
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sCondVar = new CondVar(*sMutex, "Event tracer thread condvar");
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return sMutex && sCondVar;
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}
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void CleanUpWidgetTracing()
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{
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delete sMutex;
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delete sCondVar;
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sMutex = NULL;
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sCondVar = NULL;
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}
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// This function is called from the main (UI) thread.
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void SignalTracerThread()
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{
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if (!sMutex || !sCondVar)
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return;
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MutexAutoLock lock(*sMutex);
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if (!sTracerProcessed) {
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sTracerProcessed = true;
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sCondVar->Notify();
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}
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}
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// This function is called from the background tracer thread.
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bool FireAndWaitForTracerEvent()
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{
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MOZ_ASSERT(sMutex && sCondVar, "Tracing not initialized!");
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NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
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MutexAutoLock lock(*sMutex);
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if (sTracerProcessed) {
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// Things are out of sync. This is likely because we're in
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// the middle of shutting down. Just return false and hope the
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// tracer thread is quitting anyway.
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return false;
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}
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// Post an application-defined event to the main thread's event queue
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// and wait for it to get processed.
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[NSApp postEvent:[NSEvent otherEventWithType:NSApplicationDefined
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location:NSMakePoint(0,0)
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modifierFlags:0
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timestamp:0
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windowNumber:0
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context:NULL
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subtype:kEventSubtypeTrace
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data1:0
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data2:0]
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atStart:NO];
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while (!sTracerProcessed)
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sCondVar->Wait();
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sTracerProcessed = false;
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[pool release];
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return true;
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}
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} // namespace mozilla
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