WebSep 5, 2009 · In short, use of spin lock is correct if you garantee that your tasks will run on different CPU. Secondly, locking a mutex IS fast (as fast as spinlock) when is is unlocked. Mutexes locking (and unlocking) is slow (very slow) only if mutex is already locked. So, in your case, I suggest to use mutexes. Share. WebApr 12, 2024 · there doesn't seem to be an equivalent to spinlock in pthreads. Spinlocks are often considered a wrong tool in user-space because there is no way to disable thread preemption while the spinlock is held (unlike in kernel).
pthread_spin_lock.c - nptl/pthread_spin_lock.c - Glibc source code ...
Webpthread_spin_lock() may fail with the following errors: EDEADLOCK The system detected a deadlock condition. pthread_spin_trylock() fails with the following errors: EBUSY The spin … WebThe calling thread acquires the lock if it is not held by another thread. Otherwise, the thread does not return from the pthread_spin_lock() call until the lock becomes available. The results are undefined if the calling thread holds the lock at the time the call is made. pthread_spin_lock() Syntax int pthread_spin_lock(pthread_spinlock_t *lock); hach 2000 manual
PTHREAD_SPIN_LOCK - Linux手册页-之路教程 - OnITRoad
WebFor the subsequent attempts we use atomic_compare_and_exchange after we observe that the lock is not acquired. See also comment in pthread_spin_trylock. We use acquire MO to synchronize-with the release MO store in pthread_spin_unlock, and thus ensure that prior critical sections happen-before this critical section. Webint pthread_mutex_lock (pthread_mutex_t *mutex); // 调用该函数时,若互斥锁未加锁,则上锁,返回 0; // 若互斥锁已加锁,则函数直接返回失败,即 EBUSY。 int pthread_mutex_trylock (pthread_mutex_t *mutex); // 当线程试图获取一个已加锁的互斥量时,pthread_mutex_timedlock 互斥量 // 原语允许绑定线程阻塞时间。 即非阻塞加锁互斥量。 Web对已锁定的互斥对象上调用 pthread_mutex_lock() 的所有线程都将进入睡眠状态,这些睡眠的线程将“排队”访问这个互斥对象。 从上述可知,mutex会帮助我们锁定一段逻辑区域的访问 … hach 1720e light bulb