std::condition_variable 只可与 std::unique_lockstd::mutex 一同使用;此限制在一些平台上允许最大效率。 std::condition_variable_any 提供可与任何基本可锁定 (BasicLockable) 对象,例如 std::shared_lock 一同使用的条件变量。 condition_variable 容许 wait 、
std::condition_variable_any:可等待任何对象的条件变量,包括自定义的锁类型,自定义的锁类应提供lock()和unlock()方法。 两种条件变量都支持以下常用的方法: notify_one():唤醒等待这个条件变量的线程之一。 notify_all():唤醒等待这个条件变量的所有线程。 wait():阻塞当前线程,直到条件变量被唤醒。 wait_for()...
IgnoreDeletes = true; // Create the watcher s = kvStore_Watch(&w, kv, "foo.*", &o); // Check for error.. // Now get updates: while (some_condition) { kvEntry *e = NULL; // Wait for the next update for up to 5 seconds s = kvWatcher_Next(&e, w, 5000); // Do ...
pthread_cond_broadcast() — Broadcast a condition pthread_cond_destroy() — Destroy the condition variable object pthread_cond_init() — Initialize a condition variable pthread_cond_signal() — Signal a condition pthread_cond_timedwait() — Wait on a condition variable pthread_cond_wait(...
wait_for、wait_until)调用的线程直到使用(notify_one或notify_all)通知恢复为止。condition_variable是一个类,这个类既有构造也有析构函数,使用时需要构造对应的condition_variable对象,调用对象相应的函数来实现上面的功能。 类型 说明 condition_variable 构建对象 析构 删除 wait Wait until notified waitfor ...
Previously, some time values that were passed to the concurrency library would overflow, for example, condition_variable::wait_for(seconds::max()). Now fixed, the overflows changed behavior on a seemingly random 29-day cycle (when uint32_t milliseconds accepted by underlying Win32 APIs ...
For correct execution, the value oftin statement S3 is not, in general, the value ofton the final iteration of the loop. It is in fact the last iteration for which the condition C1 is true. Computing the final value oftis quite hard in the general cases. In cases like this the compile...
Type these functions as explicitlyREALif anIMPLICITstatement is in effect that types names starting with "r" to some other date type. sind(x),asind(x), ... takedegreesrather thanradians. See also:intro(3M) and theNumerical Computation Guide. ...
voidBackgroundWorkThreadProc(XTaskQueueHandlequeue){while(true) { {std::unique_lock<std::mutex> cvLock(g_workReadyMutex); g_workReadyConditionVariable.wait(cvLock, [] {returng_workReady; });if(g_stopBackgroundWork) {break; } g_workReady =false; }boolworkFound =false;do{ workFound =...
cb.pop_front();// 3 is removed.// Leaving only one element with value = 4.assert(cb[0] ==4); 2.1.4 多维数组 Boost.MultiArray Docs:http://boost.org/libs/multi_array Boost 前面已经介绍过。这是 Boost 的其中一个子库,提供了任意维的数组。