是指在多线程编程中,使用条件变量(Condition Variable)时出现死锁的情况。 条件变量是一种线程同步机制,用于线程之间的通信和协调。它允许一个线程等待另一个线程满足特定的条件后再继续执行。在Pthread库中,条件变量通常与互斥锁(Mutex)一起使用,以确保线程之间的互斥访问和同步。 当Pthread程序使用条件变量时,可能会...
A condition (short for ''condition variable'') is a synchronization device that allows threads to suspend execution and relinquish the processors until some predicate on shared data is satisfied. The basic operations on conditions are: signal the condition(when the predicate becomes true), and wait...
在Linux中,pthread(POSIX线程)可能会出现死锁的情况 互斥锁(Mutex):当两个或多个线程在访问共享资源时,需要使用互斥锁来确保同一时间只有一个线程可以访问该资源。如果一个线程持有一个互斥锁并试图获取另一个已经被其他线程持有的互斥锁,那么这个线程就会陷入死锁。 条件变量(Condition Variable):条件变量用于线程间的...
A condition variable can be statically initialized by assigningPTHREAD_COND_INITIALIZERin its definition, as follows: pthread_cond_t def_cond = PTHREAD_COND_INITIALIZER; A condition variable must be initialized (either by callingpthread_cond_init(), or statically) before it may be used in any ot...
条件变量 condition variable: 用于线程同步,通常一个普通变量搭配使用 2. pthread API 在线文档https://pubs.opengroup.org/onlinepubs/7908799/xsh/pthread.h.html 本地文档man 3 pthreat_create等 弄懂最常用的几个API可以解决不少问题了: #include<pthread.h> ...
Allows a thread to wait on a condition variable until satisfied or until a specified time occurs. pthread_cond_timedwait() is the same as pthread_cond_wait() except it returns an error if the absolute time, specified by abstime, satisfies one of these conditions: Passes before cond is si...
Linux下pthread线程同步主要有两种方法:信号量(semaphore)和条件变量(condition_variable),在生产者消费者的实例中,通常用到的是信号量来进行同步。本文采用条件变量的通知机制,实现类似信号量的功能,完成生产者消费者示例,并在最后贴出代码。另外pthread的信号量有二值信号量和计数信号量两种,第一种信号量只有0和1两...
Initializes the condition variable referenced by cond with attributes referenced by attr. If attr is NULL, the default condition variable attributes are used.Returned value If successful, pthread_cond_init() returns 0. If unsuccessful, pthread_cond_init() returns -1 and sets errno to one of th...
当条件变量被通知(通过 pthread_cond_signal 或 pthread_cond_broadcast)时,线程会被唤醒并重新获取互斥锁。 文章来源:[C++] 理解 C++ 多线程条件变量 pthread_cond_wait 使用 1. pthread_cond_wait The pthread_cond_wait() function atomically blocks the current thread waiting on the condition variable ...
A condition variable attribute object must be initialized prior to calling any of the pthread_condattr_setXXX functions. PARAMETERS attr Is the condition variable attribute object to be initialized. RETURN VALUES On success, pthread_condattr_init() returns 0. On error, one of the following ...