WebSep 7, 2024 · 当线程被创建时，会将所有的线程局部存储变量初始化为NULL，因此第一次使用此类变量前必须先调用pthread_getspecific ()函数来确认是否已经于对应的key相关 … WebApr 8, 2024 · pthread_key_t 数据类型用于创建线程特定数据的键，以便每个线程可以访问自己的私有数据。可以使用 pthread_key_create() 函数创建一个新的线程特定数据键，并使用 pthread_setspecific() 和 pthread_getspecific() 函数设置和获取线程特定数据。

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Web显而易见的是__thread比pthread线程特有存储的用法更简洁，并且从资料来看性能更优！ 但上面这两种API都是针对C语言的，所以__thread对C++的类并不支持（非POD），而自从C++11开始，C++也增加了自己的关键字thread_local用以支持线程本地存储，从而规避了__thread 不支持 ... WebThe pthread_key_create () function shall create a thread-specific data key visible to all threads in the process. Key values provided by pthread_key_create () are opaque objects used to locate thread-specific data. Although the same key value may be used by different threads, the values bound to the key by pthread_setspecific () are maintained ... greatest games on steam

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WebJul 21, 2015 · print pthread_getspecific(i) If you have access to the pthread_t of the thread, you can: print ((struct pthread*)pth)->specific[i/32][i%32] where i in the index you want and pth is the pthread_t. See nptl/pthread_getspecific.c in the glibc sources. To do this without calling a function, you need to find the struct pthread. WebJul 14, 2012 · 3. You need to specify the pthreads library after the mysql library that introduces the dependency. Link statements are parsed left to right, if you specify a library before the object which introduces the dependency, it will be … flipmart wordpress theme