1 /* $OpenBSD: thread_private.h,v 1.18 2006/02/22 07:16:31 otto Exp $ */ 2 3 /* PUBLIC DOMAIN: No Rights Reserved. Marco S Hyman <marc@snafu.org> */ 4 5 #ifndef _THREAD_PRIVATE_H_ 6 #define _THREAD_PRIVATE_H_ 7 8 #include <pthread.h> 9 10 /* 11 * This file defines the thread library interface to libc. Thread 12 * libraries must implement the functions described here for proper 13 * inter-operation with libc. libc contains weak versions of the 14 * described functions for operation in a non-threaded environment. 15 */ 16 17 /* 18 * This variable is 0 until a second thread is created. 19 */ 20 extern int __isthreaded; 21 22 /* 23 * helper macro to make unique names in the thread namespace 24 */ 25 #define __THREAD_NAME(name) __CONCAT(_thread_tagname_,name) 26 27 struct __thread_private_tag_t { 28 pthread_mutex_t _private_lock; 29 pthread_key_t _private_key; 30 }; 31 32 #define _THREAD_PRIVATE_MUTEX(name) \ 33 static struct __thread_private_tag_t __THREAD_NAME(name) = { PTHREAD_MUTEX_INITIALIZER, -1 } 34 #define _THREAD_PRIVATE_MUTEX_LOCK(name) \ 35 pthread_mutex_lock( &__THREAD_NAME(name)._private_lock ) 36 #define _THREAD_PRIVATE_MUTEX_UNLOCK(name) \ 37 pthread_mutex_unlock( &__THREAD_NAME(name)._private_lock ) 38 39 void _thread_atexit_lock(void); 40 void _thread_atexit_unlock(void); 41 42 #define _ATEXIT_LOCK() do { \ 43 if (__isthreaded) \ 44 _thread_atexit_lock(); \ 45 } while (0) 46 #define _ATEXIT_UNLOCK() do { \ 47 if (__isthreaded) \ 48 _thread_atexit_unlock();\ 49 } while (0) 50 51 #endif /* _THREAD_PRIVATE_H_ */ 52