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      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 (at) snafu.org> */
      4 
      5 #ifndef _THREAD_PRIVATE_H_
      6 #define _THREAD_PRIVATE_H_
      7 
      8 #include <pthread.h>
      9 
     10 __BEGIN_DECLS
     11 
     12 /*
     13  * This file defines the thread library interface to libc.  Thread
     14  * libraries must implement the functions described here for proper
     15  * inter-operation with libc.   libc contains weak versions of the
     16  * described functions for operation in a non-threaded environment.
     17  */
     18 
     19 /*
     20  * helper macro to make unique names in the thread namespace
     21  */
     22 #define __THREAD_NAME(name)	__CONCAT(_thread_tagname_,name)
     23 
     24 struct __thread_private_tag_t {
     25     pthread_mutex_t    _private_lock;
     26     pthread_key_t      _private_key;
     27 };
     28 
     29 #define _THREAD_PRIVATE_MUTEX(name)  \
     30 	static struct __thread_private_tag_t  __THREAD_NAME(name) = { PTHREAD_MUTEX_INITIALIZER, -1 }
     31 #define _THREAD_PRIVATE_MUTEX_LOCK(name)  \
     32 	pthread_mutex_lock( &__THREAD_NAME(name)._private_lock )
     33 #define _THREAD_PRIVATE_MUTEX_UNLOCK(name) \
     34 	pthread_mutex_unlock( &__THREAD_NAME(name)._private_lock )
     35 
     36 /* Note that these aren't compatible with the usual OpenBSD ones which lazy-initialize! */
     37 #define _MUTEX_LOCK(l) pthread_mutex_lock((pthread_mutex_t*) l)
     38 #define _MUTEX_UNLOCK(l) pthread_mutex_unlock((pthread_mutex_t*) l)
     39 
     40 __LIBC_HIDDEN__ void  _thread_atexit_lock(void);
     41 __LIBC_HIDDEN__ void  _thread_atexit_unlock(void);
     42 
     43 #define _ATEXIT_LOCK() _thread_atexit_lock()
     44 #define _ATEXIT_UNLOCK() _thread_atexit_unlock()
     45 
     46 __LIBC_HIDDEN__ void    _thread_arc4_lock(void);
     47 __LIBC_HIDDEN__ void    _thread_arc4_unlock(void);
     48 
     49 #define _ARC4_LOCK() _thread_arc4_lock()
     50 #define _ARC4_UNLOCK() _thread_arc4_unlock()
     51 #define _ARC4_ATFORK(f) pthread_atfork(NULL, NULL, (f))
     52 
     53 __END_DECLS
     54 
     55 #endif /* _THREAD_PRIVATE_H_ */
     56