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/_pthreadtypes.h>
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.
44 extern int __isthreaded;
47 * Elf_Auxinfo *__elf_aux_vector, the pointer to the ELF aux vector
48 * provided by kernel. Either set for us by rtld, or found at runtime
49 * on stack for static binaries.
51 * Type is void to avoid polluting whole libc with ELF types.
53 extern void *__elf_aux_vector;
56 * libc should use libc_dlopen internally, which respects a global
57 * flag where loading of new shared objects can be restricted.
59 void *libc_dlopen(const char *, int);
64 void _rtld_error(const char *fmt, ...);
67 * File lock contention is difficult to diagnose without knowing
68 * where locks were set. Allow a debug library to be built which
69 * records the source file and line number of each lock call.
72 #define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__)
74 #define _FLOCKFILE(x) _flockfile(x)
78 * Macros for locking and unlocking FILEs. These test if the
79 * process is threaded to avoid locking when not required.
81 #define FLOCKFILE(fp) if (__isthreaded) _FLOCKFILE(fp)
82 #define FUNLOCKFILE(fp) if (__isthreaded) _funlockfile(fp)
85 extern struct _spinlock __stdio_thread_lock;
86 #define STDIO_THREAD_LOCK() \
89 _SPINLOCK(&__stdio_thread_lock); \
91 #define STDIO_THREAD_UNLOCK() \
94 _SPINUNLOCK(&__stdio_thread_lock); \
98 * Indexes into the pthread jump table.
100 * Warning! If you change this type, you must also change the threads
101 * libraries that reference it (libc_r, libpthread).
106 PJT_ATTR_GETDETACHSTATE,
107 PJT_ATTR_GETGUARDSIZE,
108 PJT_ATTR_GETINHERITSCHED,
109 PJT_ATTR_GETSCHEDPARAM,
110 PJT_ATTR_GETSCHEDPOLICY,
112 PJT_ATTR_GETSTACKADDR,
113 PJT_ATTR_GETSTACKSIZE,
115 PJT_ATTR_SETDETACHSTATE,
116 PJT_ATTR_SETGUARDSIZE,
117 PJT_ATTR_SETINHERITSCHED,
118 PJT_ATTR_SETSCHEDPARAM,
119 PJT_ATTR_SETSCHEDPOLICY,
121 PJT_ATTR_SETSTACKADDR,
122 PJT_ATTR_SETSTACKSIZE,
141 PJT_MUTEXATTR_DESTROY,
143 PJT_MUTEXATTR_SETTYPE,
153 PJT_RWLOCK_TRYRDLOCK,
154 PJT_RWLOCK_TRYWRLOCK,
164 PJT_CLEANUP_PUSH_IMP,
170 typedef int (*pthread_func_t)(void);
171 typedef pthread_func_t pthread_func_entry_t[2];
173 extern pthread_func_entry_t __thr_jtable[];
176 * yplib internal interfaces
179 int _yp_check(char **);
183 * Initialise TLS for static programs
185 void _init_tls(void);
188 * Provides pthread_once()-like functionality for both single-threaded
189 * and multi-threaded applications.
191 int _once(pthread_once_t *, void (*)(void));
194 * Set the TLS thread pointer
196 void _set_tp(void *tp);
199 * This is a pointer in the C run-time startup code. It is used
200 * by getprogname() and setprogname().
202 extern const char *__progname;
205 * This function is used by the threading libraries to notify malloc that a
208 void _malloc_thread_cleanup(void);
211 * These functions are used by the threading libraries in order to protect
212 * malloc across fork().
214 void _malloc_prefork(void);
215 void _malloc_postfork(void);
218 * Function to clean up streams, called from abort() and exit().
220 extern void (*__cleanup)(void);
223 * Get kern.osreldate to detect ABI revisions. Explicitly
224 * ignores value of $OSVERSION and caches result. Prototypes
225 * for the wrapped "new" pad-less syscalls are here for now.
227 extern int __getosreldate(void);
228 #include <sys/_types.h>
230 extern __off_t __sys_lseek(int, __off_t, int);
231 extern int __sys_ftruncate(int, __off_t);
232 extern int __sys_truncate(const char *, __off_t);
233 extern __ssize_t __sys_pread(int, void *, __size_t, __off_t);
234 extern __ssize_t __sys_pwrite(int, const void *, __size_t, __off_t);
235 extern void * __sys_mmap(void *, __size_t, int, int, int, __off_t);
238 extern __off_t __sys_freebsd6_lseek(int, int, __off_t, int);
239 extern int __sys_freebsd6_ftruncate(int, int, __off_t);
240 extern int __sys_freebsd6_truncate(const char *, int, __off_t);
241 extern __ssize_t __sys_freebsd6_pread(int, void *, __size_t, int, __off_t);
242 extern __ssize_t __sys_freebsd6_pwrite(int, const void *, __size_t, int, __off_t);
243 extern void * __sys_freebsd6_mmap(void *, __size_t, int, int, int, int, __off_t);
245 /* Without back-compat translation */
246 extern int __sys_fcntl(int, int, ...);
248 /* execve() with PATH processing to implement posix_spawnp() */
249 int _execvpe(const char *, char * const *, char * const *);
251 int _elf_aux_info(int aux, void *buf, int buflen);
253 int __elf_phdr_match_addr(struct dl_phdr_info *, void *);
254 void __init_elf_aux_vector(void);
256 void _pthread_cancel_enter(int);
257 void _pthread_cancel_leave(int);
259 #endif /* _LIBC_PRIVATE_H_ */