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PTHREAD_GETSPECIFIC(3) Library Functions Manual PTHREAD_GETSPECIFIC(3)

pthread_getspecific
get a thread-specific data value

#include <pthread.h>
void *
pthread_getspecific(pthread_key_t key);

The pthread_getspecific() function returns the value currently bound to the specified key on behalf of the calling thread.
The effect of calling pthread_getspecific() with a key value not obtained from pthread_key_create() or after key has been deleted with pthread_key_delete() is undefined.
pthread_getspecific() may be called from a thread-specific data destructor function.

The pthread_getspecific() function will return the thread-specific data value associated with the given key. If no thread-specific data value is associated with key, then the value NULL is returned.

None.

pthread_key_create(3), pthread_key_delete(3), pthread_setspecific(3)

pthread_getspecific() conforms to ISO/IEC 9945-1:1996 (“POSIX.1”).
June 5, 2013 OpenBSD-current