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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkAtomics.h" | 8 #include "SkAtomics.h" |
9 #include "SkEventTracer.h" | 9 #include "SkEventTracer.h" |
10 #include "SkLazyPtr.h" | 10 #include "SkLazyPtr.h" |
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40 }; | 40 }; |
41 | 41 |
42 // We prefer gUserTracer if it's been set, otherwise we fall back on gDefaultTra
cer. | 42 // We prefer gUserTracer if it's been set, otherwise we fall back on gDefaultTra
cer. |
43 static SkEventTracer* gUserTracer = nullptr; | 43 static SkEventTracer* gUserTracer = nullptr; |
44 SK_DECLARE_STATIC_LAZY_PTR(SkDefaultEventTracer, gDefaultTracer); | 44 SK_DECLARE_STATIC_LAZY_PTR(SkDefaultEventTracer, gDefaultTracer); |
45 | 45 |
46 void SkEventTracer::SetInstance(SkEventTracer* tracer) { | 46 void SkEventTracer::SetInstance(SkEventTracer* tracer) { |
47 SkASSERT(nullptr == sk_atomic_load(&gUserTracer, sk_memory_order_acquire)); | 47 SkASSERT(nullptr == sk_atomic_load(&gUserTracer, sk_memory_order_acquire)); |
48 sk_atomic_store(&gUserTracer, tracer, sk_memory_order_release); | 48 sk_atomic_store(&gUserTracer, tracer, sk_memory_order_release); |
49 // An atomic load during process shutdown is probably overkill, but safe ove
rkill. | 49 // An atomic load during process shutdown is probably overkill, but safe ove
rkill. |
50 atexit([](){ SkDELETE(sk_atomic_load(&gUserTracer, sk_memory_order_acquire))
; }); | 50 atexit([]() { delete sk_atomic_load(&gUserTracer, sk_memory_order_acquire);
}); |
51 } | 51 } |
52 | 52 |
53 SkEventTracer* SkEventTracer::GetInstance() { | 53 SkEventTracer* SkEventTracer::GetInstance() { |
54 if (SkEventTracer* tracer = sk_atomic_load(&gUserTracer, sk_memory_order_acq
uire)) { | 54 if (SkEventTracer* tracer = sk_atomic_load(&gUserTracer, sk_memory_order_acq
uire)) { |
55 return tracer; | 55 return tracer; |
56 } | 56 } |
57 return gDefaultTracer.get(); | 57 return gDefaultTracer.get(); |
58 } | 58 } |
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