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); Web可以使用 pthread_mutex_trylock() 函数。 这个函数和 pthread_mutex_lock() 用法一样，只不过当请求的锁正在被占用的时候， 不会进入阻塞状态，而是立刻返回，并返回一个错误代码 EBUSY，意思是说， 有其它线程正在使用这个锁。

pthread_spin_lock源码-掘金 - 稀土掘金

Webpthread_spin_lock源码技术、学习、经验文章掘金开发者社区搜索结果。掘金是一个帮助开发者成长的社区，pthread_spin_lock源码技术文章由稀土上聚集的技术大牛和极客共同 … Web虽然性能得到提升，但是我们希望着重说明，如果能够避免使用这个技术，即避免产生由于同步导致的数据传输，才是最佳方案。. 举例说明：如果一个任务可以并行化并且我们有64 … safety tech job description

POSIX threads - attempting lock on empty spinlock

Webそれ以外の場合、スレッドは、そのロックが使用可能になるまで pthread_spin_lock() 呼び出しから復帰しません。呼び出し時に、呼び出しスレッドがロックを保持している場合の結果は不定です。 pthread_spin_lock() の構文 int pthread_spin_lock(pthread_spinlock_t *lock); Web__pthread_spin_lock (pthread_spinlock_t *lock) 25 {26: int val = 0; 27: 28 /* We assume that the first try mostly will be successful, thus we use: 29: atomic_exchange if it is not … WebOct 4, 2012 · 58. The short answer is that a spinlock can be better when you plan to hold the lock for an extremely short interval (for example to do nothing but increment a counter), and contention is expected to be rare, but the operation is occurring often enough to be a potential performance bottleneck. The advantages of a spinlock over a mutex are: the year 1870