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: head/lib/libc/include/libc_private.h 213153 2010-09-25 01:57:47Z davidxu $ 30 * 31 * Private definitions for libc, libc_r and libpthread. 32 * 33 */ 34 35 #ifndef _LIBC_PRIVATE_H_ 36 #define _LIBC_PRIVATE_H_ 37 38 #include <sys/_pthreadtypes.h> 39 40 /* 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. 44 */ 45 #ifndef __LIBC_ISTHREADED_DECLARED 46 #define __LIBC_ISTHREADED_DECLARED 47 extern int __isthreaded; 48 #endif 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 * Initialise TLS static programs 70 */ 71 int __get_errno_GS_offset(void); 72 void *__get_errno_GOT_ptr(void); 73 74 struct statfs; 75 struct statvfs; 76 77 /* 78 * yplib internal interfaces 79 */ 80 #ifdef YP 81 int _yp_check(char **); 82 #endif 83 84 /* 85 * This is a pointer in the C run-time startup code. It is used 86 * by getprogname() and setprogname(). 87 */ 88 extern const char *__progname; 89 90 /* 91 * Notify libc that thread is exiting and its TLS destructors can be called. 92 */ 93 void _thread_finalize(void); 94 95 /* 96 * Function to clean up streams, called from abort() and exit(). 97 */ 98 extern void (*__cleanup)(void); 99 100 /* execve() with PATH processing to implement posix_spawnp() */ 101 int _execvpe(const char *, char * const *, char * const *); 102 void _nmalloc_thr_init(void); 103 void _nmalloc_thr_prepfork(void); 104 void _nmalloc_thr_parentfork(void); 105 void _nmalloc_thr_childfork(void); 106 107 struct dl_phdr_info; 108 int __elf_phdr_match_addr(struct dl_phdr_info *, void *); 109 110 /* 111 * libc should use libc_dlopen internally, which respects a global 112 * flag where loading of new shared objects can be restricted. 113 */ 114 void *libc_dlopen(const char *, int); 115 116 /* 117 * For dynamic linker 118 */ 119 void _rtld_error(const char *fmt, ...); 120 121 /* 122 * Provides pthread_once()-like functionality for both single-threaded 123 * and multi-threaded applications 124 */ 125 int _once(pthread_once_t *, void (*)(void)); 126 127 #endif /* _LIBC_PRIVATE_H_ */ 128