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1 /* Copyright (c) 2009, Google Inc. | 1 /* Copyright (c) 2009, Google Inc. |
2 * All rights reserved. | 2 * All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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42 namespace internal { | 42 namespace internal { |
43 | 43 |
44 void SpinLockDelay(volatile Atomic32 *w, int32 value, int loop) { | 44 void SpinLockDelay(volatile Atomic32 *w, int32 value, int loop) { |
45 int save_errno = errno; | 45 int save_errno = errno; |
46 if (loop == 0) { | 46 if (loop == 0) { |
47 } else if (loop == 1) { | 47 } else if (loop == 1) { |
48 sched_yield(); | 48 sched_yield(); |
49 } else { | 49 } else { |
50 struct timespec tm; | 50 struct timespec tm; |
51 tm.tv_sec = 0; | 51 tm.tv_sec = 0; |
52 tm.tv_nsec = base::internal::SuggestedDelayNS(loop); | 52 tm.tv_nsec = 1000000; |
53 nanosleep(&tm, NULL); | 53 nanosleep(&tm, NULL); |
54 } | 54 } |
55 errno = save_errno; | 55 errno = save_errno; |
56 } | 56 } |
57 | 57 |
58 void SpinLockWake(volatile Atomic32 *w, bool all) { | 58 void SpinLockWake(volatile Atomic32 *w, bool all) { |
59 } | 59 } |
60 | 60 |
61 } // namespace internal | 61 } // namespace internal |
62 } // namespace base | 62 } // namespace base |
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