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 __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