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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "once.h" | 5 #include "once.h" |
6 | 6 |
7 #ifdef _WIN32 | 7 #ifdef _WIN32 |
8 #include <windows.h> | 8 #include <windows.h> |
9 #else | 9 #else |
10 #include <sched.h> | 10 #include <sched.h> |
11 #endif | 11 #endif |
12 | 12 |
13 #include "atomicops.h" | 13 #include "atomicops.h" |
14 #include "checks.h" | |
15 | 14 |
16 namespace v8 { | 15 namespace v8 { |
17 namespace internal { | 16 namespace internal { |
18 | 17 |
19 void CallOnceImpl(OnceType* once, PointerArgFunction init_func, void* arg) { | 18 void CallOnceImpl(OnceType* once, PointerArgFunction init_func, void* arg) { |
20 AtomicWord state = Acquire_Load(once); | 19 AtomicWord state = Acquire_Load(once); |
21 // Fast path. The provided function was already executed. | 20 // Fast path. The provided function was already executed. |
22 if (state == ONCE_STATE_DONE) { | 21 if (state == ONCE_STATE_DONE) { |
23 return; | 22 return; |
24 } | 23 } |
(...skipping 20 matching lines...) Expand all Loading... |
45 ::Sleep(0); | 44 ::Sleep(0); |
46 #else | 45 #else |
47 sched_yield(); | 46 sched_yield(); |
48 #endif | 47 #endif |
49 state = Acquire_Load(once); | 48 state = Acquire_Load(once); |
50 } | 49 } |
51 } | 50 } |
52 } | 51 } |
53 | 52 |
54 } } // namespace v8::internal | 53 } } // namespace v8::internal |
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