2 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
31 * Private definitions for libc, libc_r and libpthread.
35 #ifndef _LIBC_PRIVATE_H_
36 #define _LIBC_PRIVATE_H_
37 #include <sys/_types.h>
38 #include <sys/_pthreadtypes.h>
41 * This global flag is non-zero when a process has created one
42 * or more threads. It is used to avoid calling locking functions
43 * when they are not required.
45 extern int __isthreaded;
48 * Elf_Auxinfo *__elf_aux_vector, the pointer to the ELF aux vector
49 * provided by kernel. Either set for us by rtld, or found at runtime
50 * on stack for static binaries.
52 * Type is void to avoid polluting whole libc with ELF types.
54 extern void *__elf_aux_vector;
57 * libc should use libc_dlopen internally, which respects a global
58 * flag where loading of new shared objects can be restricted.
60 void *libc_dlopen(const char *, int);
65 void _rtld_error(const char *fmt, ...);
68 * File lock contention is difficult to diagnose without knowing
69 * where locks were set. Allow a debug library to be built which
70 * records the source file and line number of each lock call.
73 #define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__)
75 #define _FLOCKFILE(x) _flockfile(x)
79 * Macros for locking and unlocking FILEs. These test if the
80 * process is threaded to avoid locking when not required.
82 #define FLOCKFILE(fp) if (__isthreaded) _FLOCKFILE(fp)
83 #define FUNLOCKFILE(fp) if (__isthreaded) _funlockfile(fp)
86 extern struct _spinlock __stdio_thread_lock;
87 #define STDIO_THREAD_LOCK() \
90 _SPINLOCK(&__stdio_thread_lock); \
92 #define STDIO_THREAD_UNLOCK() \
95 _SPINUNLOCK(&__stdio_thread_lock); \
99 * Indexes into the pthread jump table.
101 * Warning! If you change this type, you must also change the threads
102 * libraries that reference it (libc_r, libpthread).
107 PJT_ATTR_GETDETACHSTATE,
108 PJT_ATTR_GETGUARDSIZE,
109 PJT_ATTR_GETINHERITSCHED,
110 PJT_ATTR_GETSCHEDPARAM,
111 PJT_ATTR_GETSCHEDPOLICY,
113 PJT_ATTR_GETSTACKADDR,
114 PJT_ATTR_GETSTACKSIZE,
116 PJT_ATTR_SETDETACHSTATE,
117 PJT_ATTR_SETGUARDSIZE,
118 PJT_ATTR_SETINHERITSCHED,
119 PJT_ATTR_SETSCHEDPARAM,
120 PJT_ATTR_SETSCHEDPOLICY,
122 PJT_ATTR_SETSTACKADDR,
123 PJT_ATTR_SETSTACKSIZE,
142 PJT_MUTEXATTR_DESTROY,
144 PJT_MUTEXATTR_SETTYPE,
154 PJT_RWLOCK_TRYRDLOCK,
155 PJT_RWLOCK_TRYWRLOCK,
165 PJT_CLEANUP_PUSH_IMP,
171 typedef int (*pthread_func_t)(void);
172 typedef pthread_func_t pthread_func_entry_t[2];
174 extern pthread_func_entry_t __thr_jtable[];
177 * yplib internal interfaces
180 int _yp_check(char **);
184 * Initialise TLS for static programs
186 void _init_tls(void);
189 * Provides pthread_once()-like functionality for both single-threaded
190 * and multi-threaded applications.
192 int _once(pthread_once_t *, void (*)(void));
195 * Set the TLS thread pointer
197 void _set_tp(void *tp);
200 * This is a pointer in the C run-time startup code. It is used
201 * by getprogname() and setprogname().
203 extern const char *__progname;
206 * This function is used by the threading libraries to notify malloc that a
209 void _malloc_thread_cleanup(void);
212 * These functions are used by the threading libraries in order to protect
213 * malloc across fork().
215 void _malloc_prefork(void);
216 void _malloc_postfork(void);
219 * Function to clean up streams, called from abort() and exit().
221 extern void (*__cleanup)(void);
224 * Get kern.osreldate to detect ABI revisions. Explicitly
225 * ignores value of $OSVERSION and caches result. Prototypes
226 * for the wrapped "new" pad-less syscalls are here for now.
228 extern int __getosreldate(void);
229 #include <sys/_types.h>
231 extern __off_t __sys_lseek(int, __off_t, int);
232 extern int __sys_ftruncate(int, __off_t);
233 extern int __sys_truncate(const char *, __off_t);
234 extern __ssize_t __sys_pread(int, void *, __size_t, __off_t);
235 extern __ssize_t __sys_pwrite(int, const void *, __size_t, __off_t);
236 extern void * __sys_mmap(void *, __size_t, int, int, int, __off_t);
239 extern __off_t __sys_freebsd6_lseek(int, int, __off_t, int);
240 extern int __sys_freebsd6_ftruncate(int, int, __off_t);
241 extern int __sys_freebsd6_truncate(const char *, int, __off_t);
242 extern __ssize_t __sys_freebsd6_pread(int, void *, __size_t, int, __off_t);
243 extern __ssize_t __sys_freebsd6_pwrite(int, const void *, __size_t, int, __off_t);
244 extern void * __sys_freebsd6_mmap(void *, __size_t, int, int, int, int, __off_t);
246 /* Without back-compat translation */
247 extern int __sys_fcntl(int, int, ...);
252 int __sys_gettimeofday(struct timeval *, struct timezone *);
253 int __sys_clock_gettime(__clockid_t, struct timespec *ts);
255 /* execve() with PATH processing to implement posix_spawnp() */
256 int _execvpe(const char *, char * const *, char * const *);
258 int _elf_aux_info(int aux, void *buf, int buflen);
260 int __elf_phdr_match_addr(struct dl_phdr_info *, void *);
261 void __init_elf_aux_vector(void);
263 void _pthread_cancel_enter(int);
264 void _pthread_cancel_leave(int);
266 #endif /* _LIBC_PRIVATE_H_ */