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: src/lib/libc/include/libc_private.h,v 1.11 2003/11/05 18:17:30 deischen Exp $ 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 /* 42 * This global flag is non-zero when a process has created one 43 * or more threads. It is used to avoid calling locking functions 44 * when they are not required. 45 */ 46 extern int __isthreaded; 47 48 /* 49 * File lock contention is difficult to diagnose without knowing 50 * where locks were set. Allow a debug library to be built which 51 * records the source file and line number of each lock call. 52 */ 53 #ifdef _FLOCK_DEBUG 54 #define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__) 55 #else 56 #define _FLOCKFILE(x) _flockfile(x) 57 #endif 58 59 /* 60 * Macros for locking and unlocking FILEs. These test if the 61 * process is threaded to avoid locking when not required. 62 */ 63 #define FLOCKFILE(fp) if (__isthreaded) _FLOCKFILE(fp) 64 #define FUNLOCKFILE(fp) if (__isthreaded) _funlockfile(fp) 65 66 /* 67 * Indexes into the pthread jump table. 68 * 69 * Warning! If you change this type, you must also change the threads 70 * libraries that reference it (libc_r, libpthread). 71 */ 72 typedef enum { 73 PJT_COND_BROADCAST, 74 PJT_COND_DESTROY, 75 PJT_COND_INIT, 76 PJT_COND_SIGNAL, 77 PJT_COND_WAIT, 78 PJT_GETSPECIFIC, 79 PJT_KEY_CREATE, 80 PJT_KEY_DELETE, 81 PJT_MAIN_NP, 82 PJT_MUTEX_DESTROY, 83 PJT_MUTEX_INIT, 84 PJT_MUTEX_LOCK, 85 PJT_MUTEX_TRYLOCK, 86 PJT_MUTEX_UNLOCK, 87 PJT_MUTEXATTR_DESTROY, 88 PJT_MUTEXATTR_INIT, 89 PJT_MUTEXATTR_SETTYPE, 90 PJT_ONCE, 91 PJT_RWLOCK_DESTROY, 92 PJT_RWLOCK_INIT, 93 PJT_RWLOCK_RDLOCK, 94 PJT_RWLOCK_TRYRDLOCK, 95 PJT_RWLOCK_TRYWRLOCK, 96 PJT_RWLOCK_UNLOCK, 97 PJT_RWLOCK_WRLOCK, 98 PJT_SELF, 99 PJT_SETSPECIFIC, 100 PJT_SIGMASK, 101 PJT_MAX 102 } pjt_index_t; 103 104 typedef int (*pthread_func_t)(void); 105 typedef pthread_func_t pthread_func_entry_t[2]; 106 107 extern pthread_func_entry_t __thr_jtable[]; 108 109 /* 110 * yplib internal interfaces 111 */ 112 #ifdef YP 113 int _yp_check(char **); 114 #endif 115 116 117 /* 118 * This is a pointer in the C run-time startup code. It is used 119 * by getprogname() and setprogname(). 120 */ 121 extern const char *__progname; 122 123 /* 124 * This is the lock to make malloc() thread-safe. It is externalized 125 * so that thread libraries can protect malloc across fork(). 126 */ 127 extern struct _spinlock *__malloc_lock; 128 129 #endif /* _LIBC_PRIVATE_H_ */ 130