libc_private.h revision 122069 
1/*
2 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by John Birrell.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD: head/lib/libc/include/libc_private.h 122069 2003-11-04 19:49:56Z deischen $
33 *
34 * Private definitions for libc, libc_r and libpthread.
35 *
36 */
37
38#ifndef _LIBC_PRIVATE_H_
39#define _LIBC_PRIVATE_H_
40
41#include <spinlock.h>
42
43/*
44 * This global flag is non-zero when a process has created one
45 * or more threads. It is used to avoid calling locking functions
46 * when they are not required.
47 */
48extern int	__isthreaded;
49
50/*
51 * File lock contention is difficult to diagnose without knowing
52 * where locks were set. Allow a debug library to be built which
53 * records the source file and line number of each lock call.
54 */
55#ifdef	_FLOCK_DEBUG
56#define _FLOCKFILE(x)	_flockfile_debug(x, __FILE__, __LINE__)
57#else
58#define _FLOCKFILE(x)	_flockfile(x)
59#endif
60
61/*
62 * Macros for locking and unlocking FILEs. These test if the
63 * process is threaded to avoid locking when not required.
64 */
65#define	FLOCKFILE(fp)		if (__isthreaded) _FLOCKFILE(fp)
66#define	FUNLOCKFILE(fp)		if (__isthreaded) _funlockfile(fp)
67
68/*
69 * Indexes into the pthread jump table.
70 *
71 * Warning! If you change this type, you must also change the threads
72 * libraries that reference it (libc_r, libpthread).
73 */
74typedef enum {
75	PJT_COND_BROADCAST,
76	PJT_COND_DESTROY,
77	PJT_COND_INIT,
78	PJT_COND_SIGNAL,
79	PJT_COND_WAIT,
80	PJT_GETSPECIFIC,
81	PJT_KEY_CREATE,
82	PJT_KEY_DELETE,
83	PJT_MAIN_NP,
84	PJT_MUTEX_DESTROY,
85	PJT_MUTEX_INIT,
86	PJT_MUTEX_LOCK,
87	PJT_MUTEX_TRYLOCK,
88	PJT_MUTEX_UNLOCK,
89	PJT_MUTEXATTR_DESTROY,
90	PJT_MUTEXATTR_INIT,
91	PJT_MUTEXATTR_SETTYPE,
92	PJT_ONCE,
93	PJT_RWLOCK_DESTROY,
94	PJT_RWLOCK_INIT,
95	PJT_RWLOCK_RDLOCK,
96	PJT_RWLOCK_TRYRDLOCK,
97	PJT_RWLOCK_TRYWRLOCK,
98	PJT_RWLOCK_UNLOCK,
99	PJT_RWLOCK_WRLOCK,
100	PJT_SELF,
101	PJT_SETSPECIFIC,
102	PJT_SIGMASK,
103	PJT_MAX
104} pjt_index_t;
105
106typedef int (*pthread_func_t)(void);
107typedef pthread_func_t pthread_func_entry_t[2];
108
109extern pthread_func_entry_t __thr_jtable[];
110
111/*
112 * yplib internal interfaces
113 */
114#ifdef YP
115int _yp_check(char **);
116#endif
117
118
119/*
120 * This is a pointer in the C run-time startup code. It is used
121 * by getprogname() and setprogname().
122 */
123extern const char *__progname;
124
125/*
126 * This is the lock to make malloc() thread-safe.  It is externalized
127 * so that thread libraries can protect malloc across fork().
128 */
129extern spinlock_t *__malloc_lock;
130
131#endif /* _LIBC_PRIVATE_H_ */
132