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comparison: widget/cocoa/WidgetTraceEvent.mm
widget/cocoa/WidgetTraceEvent.mm
- changeset 2
- 7e26c7da4463
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| -1:000000000000 | 0:a5be48404510 |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include <Cocoa/Cocoa.h> | |
| 6 #include "CustomCocoaEvents.h" | |
| 7 #include <Foundation/NSAutoreleasePool.h> | |
| 8 #include <mozilla/CondVar.h> | |
| 9 #include <mozilla/Mutex.h> | |
| 10 #include "mozilla/WidgetTraceEvent.h" | |
| 11 | |
| 12 using mozilla::CondVar; | |
| 13 using mozilla::Mutex; | |
| 14 using mozilla::MutexAutoLock; | |
| 15 | |
| 16 namespace { | |
| 17 | |
| 18 Mutex* sMutex = NULL; | |
| 19 CondVar* sCondVar = NULL; | |
| 20 bool sTracerProcessed = false; | |
| 21 | |
| 22 } | |
| 23 | |
| 24 namespace mozilla { | |
| 25 | |
| 26 bool InitWidgetTracing() | |
| 27 { | |
| 28 sMutex = new Mutex("Event tracer thread mutex"); | |
| 29 sCondVar = new CondVar(*sMutex, "Event tracer thread condvar"); | |
| 30 return sMutex && sCondVar; | |
| 31 } | |
| 32 | |
| 33 void CleanUpWidgetTracing() | |
| 34 { | |
| 35 delete sMutex; | |
| 36 delete sCondVar; | |
| 37 sMutex = NULL; | |
| 38 sCondVar = NULL; | |
| 39 } | |
| 40 | |
| 41 // This function is called from the main (UI) thread. | |
| 42 void SignalTracerThread() | |
| 43 { | |
| 44 if (!sMutex || !sCondVar) | |
| 45 return; | |
| 46 MutexAutoLock lock(*sMutex); | |
| 47 if (!sTracerProcessed) { | |
| 48 sTracerProcessed = true; | |
| 49 sCondVar->Notify(); | |
| 50 } | |
| 51 } | |
| 52 | |
| 53 // This function is called from the background tracer thread. | |
| 54 bool FireAndWaitForTracerEvent() | |
| 55 { | |
| 56 NS_ABORT_IF_FALSE(sMutex && sCondVar, "Tracing not initialized!"); | |
| 57 NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init]; | |
| 58 MutexAutoLock lock(*sMutex); | |
| 59 if (sTracerProcessed) { | |
| 60 // Things are out of sync. This is likely because we're in | |
| 61 // the middle of shutting down. Just return false and hope the | |
| 62 // tracer thread is quitting anyway. | |
| 63 return false; | |
| 64 } | |
| 65 | |
| 66 // Post an application-defined event to the main thread's event queue | |
| 67 // and wait for it to get processed. | |
| 68 [NSApp postEvent:[NSEvent otherEventWithType:NSApplicationDefined | |
| 69 location:NSMakePoint(0,0) | |
| 70 modifierFlags:0 | |
| 71 timestamp:0 | |
| 72 windowNumber:0 | |
| 73 context:NULL | |
| 74 subtype:kEventSubtypeTrace | |
| 75 data1:0 | |
| 76 data2:0] | |
| 77 atStart:NO]; | |
| 78 while (!sTracerProcessed) | |
| 79 sCondVar->Wait(); | |
| 80 sTracerProcessed = false; | |
| 81 [pool release]; | |
| 82 return true; | |
| 83 } | |
| 84 | |
| 85 } // namespace mozilla |
