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. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 * 31 * Private definitions for libc, libc_r and libpthread. 32 * 33 */ 34 35 #ifndef _LIBC_PRIVATE_H_ 36 #define _LIBC_PRIVATE_H_ 37 #include <sys/_pthreadtypes.h> 38 39 /* 40 * This global flag is non-zero when a process has created one 41 * or more threads. It is used to avoid calling locking functions 42 * when they are not required. 43 */ 44 extern int __isthreaded; 45 46 /* 47 * libc should use libc_dlopen internally, which respects a global 48 * flag where loading of new shared objects can be restricted. 49 */ 50 void *libc_dlopen(const char *, int); 51 52 /* 53 * For dynamic linker. 54 */ 55 void _rtld_error(const char *fmt, ...); 56 57 /* 58 * File lock contention is difficult to diagnose without knowing 59 * where locks were set. Allow a debug library to be built which 60 * records the source file and line number of each lock call. 61 */ 62 #ifdef _FLOCK_DEBUG 63 #define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__) 64 #else 65 #define _FLOCKFILE(x) _flockfile(x) 66 #endif 67 68 /* 69 * Macros for locking and unlocking FILEs. These test if the 70 * process is threaded to avoid locking when not required. 71 */ 72 #define FLOCKFILE(fp) if (__isthreaded) _FLOCKFILE(fp) 73 #define FUNLOCKFILE(fp) if (__isthreaded) _funlockfile(fp) 74 75 /* 76 * Indexes into the pthread jump table. 77 * 78 * Warning! If you change this type, you must also change the threads 79 * libraries that reference it (libc_r, libpthread). 80 */ 81 typedef enum { 82 PJT_ATFORK, 83 PJT_ATTR_DESTROY, 84 PJT_ATTR_GETDETACHSTATE, 85 PJT_ATTR_GETGUARDSIZE, 86 PJT_ATTR_GETINHERITSCHED, 87 PJT_ATTR_GETSCHEDPARAM, 88 PJT_ATTR_GETSCHEDPOLICY, 89 PJT_ATTR_GETSCOPE, 90 PJT_ATTR_GETSTACKADDR, 91 PJT_ATTR_GETSTACKSIZE, 92 PJT_ATTR_INIT, 93 PJT_ATTR_SETDETACHSTATE, 94 PJT_ATTR_SETGUARDSIZE, 95 PJT_ATTR_SETINHERITSCHED, 96 PJT_ATTR_SETSCHEDPARAM, 97 PJT_ATTR_SETSCHEDPOLICY, 98 PJT_ATTR_SETSCOPE, 99 PJT_ATTR_SETSTACKADDR, 100 PJT_ATTR_SETSTACKSIZE, 101 PJT_CANCEL, 102 PJT_CLEANUP_POP, 103 PJT_CLEANUP_PUSH, 104 PJT_COND_BROADCAST, 105 PJT_COND_DESTROY, 106 PJT_COND_INIT, 107 PJT_COND_SIGNAL, 108 PJT_COND_TIMEDWAIT, 109 PJT_COND_WAIT, 110 PJT_DETACH, 111 PJT_EQUAL, 112 PJT_EXIT, 113 PJT_GETSPECIFIC, 114 PJT_JOIN, 115 PJT_KEY_CREATE, 116 PJT_KEY_DELETE, 117 PJT_KILL, 118 PJT_MAIN_NP, 119 PJT_MUTEXATTR_DESTROY, 120 PJT_MUTEXATTR_INIT, 121 PJT_MUTEXATTR_SETTYPE, 122 PJT_MUTEX_DESTROY, 123 PJT_MUTEX_INIT, 124 PJT_MUTEX_LOCK, 125 PJT_MUTEX_TRYLOCK, 126 PJT_MUTEX_UNLOCK, 127 PJT_ONCE, 128 PJT_RWLOCK_DESTROY, 129 PJT_RWLOCK_INIT, 130 PJT_RWLOCK_RDLOCK, 131 PJT_RWLOCK_TRYRDLOCK, 132 PJT_RWLOCK_TRYWRLOCK, 133 PJT_RWLOCK_UNLOCK, 134 PJT_RWLOCK_WRLOCK, 135 PJT_SELF, 136 PJT_SETCANCELSTATE, 137 PJT_SETCANCELTYPE, 138 PJT_SETSPECIFIC, 139 PJT_SIGMASK, 140 PJT_TESTCANCEL, 141 PJT_CLEANUP_POP_IMP, 142 PJT_CLEANUP_PUSH_IMP, 143 PJT_CANCEL_ENTER, 144 PJT_CANCEL_LEAVE, 145 PJT_MAX 146 } pjt_index_t; 147 148 typedef int (*pthread_func_t)(void); 149 typedef pthread_func_t pthread_func_entry_t[2]; 150 151 extern pthread_func_entry_t __thr_jtable[]; 152 153 /* 154 * yplib internal interfaces 155 */ 156 #ifdef YP 157 int _yp_check(char **); 158 #endif 159 160 /* 161 * Initialise TLS for static programs 162 */ 163 void _init_tls(void); 164 165 /* 166 * Provides pthread_once()-like functionality for both single-threaded 167 * and multi-threaded applications. 168 */ 169 int _once(pthread_once_t *, void (*)(void)); 170 171 /* 172 * Set the TLS thread pointer 173 */ 174 void _set_tp(void *tp); 175 176 /* 177 * This is a pointer in the C run-time startup code. It is used 178 * by getprogname() and setprogname(). 179 */ 180 extern const char *__progname; 181 182 /* 183 * This function is used by the threading libraries to notify malloc that a 184 * thread is exiting. 185 */ 186 void _malloc_thread_cleanup(void); 187 188 /* 189 * These functions are used by the threading libraries in order to protect 190 * malloc across fork(). 191 */ 192 void _malloc_prefork(void); 193 void _malloc_postfork(void); 194 195 /* 196 * Function to clean up streams, called from abort() and exit(). 197 */ 198 extern void (*__cleanup)(void); 199 200 /* 201 * Get kern.osreldate to detect ABI revisions. Explicitly 202 * ignores value of $OSVERSION and caches result. Prototypes 203 * for the wrapped "new" pad-less syscalls are here for now. 204 */ 205 extern int __getosreldate(void); 206 #include <sys/_types.h> 207 /* Without pad */ 208 extern __off_t __sys_lseek(int, __off_t, int); 209 extern int __sys_ftruncate(int, __off_t); 210 extern int __sys_truncate(const char *, __off_t); 211 extern __ssize_t __sys_pread(int, void *, __size_t, __off_t); 212 extern __ssize_t __sys_pwrite(int, const void *, __size_t, __off_t); 213 extern void * __sys_mmap(void *, __size_t, int, int, int, __off_t); 214 215 /* With pad */ 216 extern __off_t __sys_freebsd6_lseek(int, int, __off_t, int); 217 extern int __sys_freebsd6_ftruncate(int, int, __off_t); 218 extern int __sys_freebsd6_truncate(const char *, int, __off_t); 219 extern __ssize_t __sys_freebsd6_pread(int, void *, __size_t, int, __off_t); 220 extern __ssize_t __sys_freebsd6_pwrite(int, const void *, __size_t, int, __off_t); 221 extern void * __sys_freebsd6_mmap(void *, __size_t, int, int, int, int, __off_t); 222 223 /* Without back-compat translation */ 224 extern int __sys_fcntl(int, int, ...); 225 226 /* execve() with PATH processing to implement posix_spawnp() */ 227 int _execvpe(const char *, char * const *, char * const *); 228 229 int _elf_aux_info(int aux, void *buf, int buflen); 230 struct dl_phdr_info; 231 int __elf_phdr_match_addr(struct dl_phdr_info *, void *); 232 233 void _pthread_cancel_enter(int); 234 void _pthread_cancel_leave(int); 235 236 #endif /* _LIBC_PRIVATE_H_ */ 237