The Tor Browser / file comparison
comparison: js/src/vm/Monitor.h
js/src/vm/Monitor.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:c3d34fd3c2a9 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef vm_Monitor_h | |
| 8 #define vm_Monitor_h | |
| 9 | |
| 10 #ifdef JS_THREADSAFE | |
| 11 #include "mozilla/DebugOnly.h" | |
| 12 #endif | |
| 13 | |
| 14 #include <stddef.h> | |
| 15 | |
| 16 #include "jslock.h" | |
| 17 | |
| 18 #include "js/Utility.h" | |
| 19 | |
| 20 namespace js { | |
| 21 | |
| 22 // A base class used for types intended to be used in a parallel | |
| 23 // fashion, such as the workers in the |ThreadPool| class. Combines a | |
| 24 // lock and a condition variable. You can acquire the lock or signal | |
| 25 // the condition variable using the |AutoLockMonitor| type. | |
| 26 | |
| 27 class Monitor | |
| 28 { | |
| 29 protected: | |
| 30 friend class AutoLockMonitor; | |
| 31 friend class AutoUnlockMonitor; | |
| 32 | |
| 33 PRLock *lock_; | |
| 34 PRCondVar *condVar_; | |
| 35 | |
| 36 public: | |
| 37 Monitor() | |
| 38 : lock_(nullptr), | |
| 39 condVar_(nullptr) | |
| 40 { } | |
| 41 | |
| 42 ~Monitor() { | |
| 43 #ifdef JS_THREADSAFE | |
| 44 if (lock_) | |
| 45 PR_DestroyLock(lock_); | |
| 46 if (condVar_) | |
| 47 PR_DestroyCondVar(condVar_); | |
| 48 #endif | |
| 49 } | |
| 50 | |
| 51 bool init(); | |
| 52 }; | |
| 53 | |
| 54 class AutoLockMonitor | |
| 55 { | |
| 56 private: | |
| 57 #ifdef JS_THREADSAFE | |
| 58 Monitor &monitor; | |
| 59 #endif | |
| 60 | |
| 61 public: | |
| 62 AutoLockMonitor(Monitor &monitor) | |
| 63 #ifdef JS_THREADSAFE | |
| 64 : monitor(monitor) | |
| 65 { | |
| 66 PR_Lock(monitor.lock_); | |
| 67 } | |
| 68 #else | |
| 69 {} | |
| 70 #endif | |
| 71 | |
| 72 ~AutoLockMonitor() { | |
| 73 #ifdef JS_THREADSAFE | |
| 74 PR_Unlock(monitor.lock_); | |
| 75 #endif | |
| 76 } | |
| 77 | |
| 78 bool isFor(Monitor &other) const { | |
| 79 #ifdef JS_THREADSAFE | |
| 80 return monitor.lock_ == other.lock_; | |
| 81 #else | |
| 82 return true; | |
| 83 #endif | |
| 84 } | |
| 85 | |
| 86 void wait(PRCondVar *condVar) { | |
| 87 #ifdef JS_THREADSAFE | |
| 88 mozilla::DebugOnly<PRStatus> status = | |
| 89 PR_WaitCondVar(condVar, PR_INTERVAL_NO_TIMEOUT); | |
| 90 MOZ_ASSERT(status == PR_SUCCESS); | |
| 91 #endif | |
| 92 } | |
| 93 | |
| 94 void wait() { | |
| 95 #ifdef JS_THREADSAFE | |
| 96 wait(monitor.condVar_); | |
| 97 #endif | |
| 98 } | |
| 99 | |
| 100 void notify(PRCondVar *condVar) { | |
| 101 #ifdef JS_THREADSAFE | |
| 102 mozilla::DebugOnly<PRStatus> status = PR_NotifyCondVar(condVar); | |
| 103 MOZ_ASSERT(status == PR_SUCCESS); | |
| 104 #endif | |
| 105 } | |
| 106 | |
| 107 void notify() { | |
| 108 #ifdef JS_THREADSAFE | |
| 109 notify(monitor.condVar_); | |
| 110 #endif | |
| 111 } | |
| 112 | |
| 113 void notifyAll(PRCondVar *condVar) { | |
| 114 #ifdef JS_THREADSAFE | |
| 115 mozilla::DebugOnly<PRStatus> status = PR_NotifyAllCondVar(monitor.condVar_); | |
| 116 MOZ_ASSERT(status == PR_SUCCESS); | |
| 117 #endif | |
| 118 } | |
| 119 | |
| 120 void notifyAll() { | |
| 121 #ifdef JS_THREADSAFE | |
| 122 notifyAll(monitor.condVar_); | |
| 123 #endif | |
| 124 } | |
| 125 }; | |
| 126 | |
| 127 class AutoUnlockMonitor | |
| 128 { | |
| 129 private: | |
| 130 #ifdef JS_THREADSAFE | |
| 131 Monitor &monitor; | |
| 132 #endif | |
| 133 | |
| 134 public: | |
| 135 AutoUnlockMonitor(Monitor &monitor) | |
| 136 #ifdef JS_THREADSAFE | |
| 137 : monitor(monitor) | |
| 138 { | |
| 139 PR_Unlock(monitor.lock_); | |
| 140 } | |
| 141 #else | |
| 142 {} | |
| 143 #endif | |
| 144 | |
| 145 ~AutoUnlockMonitor() { | |
| 146 #ifdef JS_THREADSAFE | |
| 147 PR_Lock(monitor.lock_); | |
| 148 #endif | |
| 149 } | |
| 150 | |
| 151 bool isFor(Monitor &other) const { | |
| 152 #ifdef JS_THREADSAFE | |
| 153 return monitor.lock_ == other.lock_; | |
| 154 #else | |
| 155 return true; | |
| 156 #endif | |
| 157 } | |
| 158 }; | |
| 159 | |
| 160 } // namespace js | |
| 161 | |
| 162 #endif /* vm_Monitor_h */ |
