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如何避免互斥锁阻塞？

[英]How to avoid mutex_lock from blocking?

原文 2013-05-28 07:34:36 8 1 c/ multithreading/ pthreads

I want to use threads with pthread in C. 我想在C中将线程与pthread一起使用。

One question I have about threads is why mutex lock does not block the execution when the whole application relays on one shared ressource? 关于线程的一个问题是，为什么当整个应用程序在一个共享资源上进行中继时，互斥锁不会阻止执行？

Bodo 博多

1 个解决方案

You want the pthread_mutex_trylock() function. 您需要pthread_mutex_trylock()函数。

The pthread_mutex_trylock() function shall be equivalent to pthread_mutex_lock(), except that if the mutex object referenced by mutex is currently locked (by any thread, including the current thread), the call shall return immediately. pthread_mutex_trylock（）函数应与pthread_mutex_lock（）等效，不同之处在于，如果当前由互斥锁引用的互斥对象被锁定（任何线程（包括当前线程）），则调用应立即返回。

Reference: https://computing.llnl.gov/tutorials/pthreads/man/pthread_mutex_trylock.txt 参考： https : //computing.llnl.gov/tutorials/pthreads/man/pthread_mutex_trylock.txt

C中互斥锁返回的顺序 - Order of mutex_lock return in C

线程互斥：mutex_lock 用 mutex_trylock 实现 - Thread mutual exclusion: mutex_lock implemented with mutex_trylock

pthread 和 mutex_lock 抛出分段核心转储 - pthread and mutex_lock throwing segmentation core dumped

在 glibc <= 2.23 中，为什么在 mutex_lock 宏中使用 `0;`？ - In glibc <= 2.23, why is `0;` used in mutex_lock macro?

严格使用 mutex_lock 和 mutex_unlock 在 2 个线程之间切换作为学术练习 - Strictly using mutex_lock & mutex_unlock to switch between 2 threads as an academic exercise

在这种特殊情况下，我应该使用spin_lock还是Mutex_lock吗？ - Should I use spin_lock or mutex_lock for this particular situation?

使用互斥锁，cond_wait的C pthread编程（计数质数） - C pthread programming(counting prime numbers) using mutex_lock, cond_wait

如何实现互斥锁（锁）的所有权？ - How is ownership of mutex (lock) implemented?

如何为一组pthread共享互斥锁？ - how to share a mutex lock for a group of pthreads ?

如何在本地使用互斥变量锁定线程？ - How to lock thread by using mutex variable locally?

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相关问题 C中互斥锁返回的顺序 - Order of mutex_lock return in C 线程互斥：mutex_lock 用 mutex_trylock 实现 - Thread mutual exclusion: mutex_lock implemented with mutex_trylock pthread 和 mutex_lock 抛出分段核心转储 - pthread and mutex_lock throwing segmentation core dumped 在 glibc <= 2.23 中，为什么在 mutex_lock 宏中使用 `0;`？ - In glibc <= 2.23, why is `0;` used in mutex_lock macro? 严格使用 mutex_lock 和 mutex_unlock 在 2 个线程之间切换作为学术练习 - Strictly using mutex_lock & mutex_unlock to switch between 2 threads as an academic exercise 在这种特殊情况下，我应该使用spin_lock还是Mutex_lock吗？ - Should I use spin_lock or mutex_lock for this particular situation? 使用互斥锁，cond_wait的C pthread编程（计数质数） - C pthread programming(counting prime numbers) using mutex_lock, cond_wait 如何实现互斥锁（锁）的所有权？ - How is ownership of mutex (lock) implemented? 如何为一组pthread共享互斥锁？ - how to share a mutex lock for a group of pthreads ? 如何在本地使用互斥变量锁定线程？ - How to lock thread by using mutex variable locally?

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