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 <machine/types.h> 39 #include <sys/_pthreadtypes.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 #ifndef __LIBC_ISTHREADED_DECLARED 47 #define __LIBC_ISTHREADED_DECLARED 48 extern int __isthreaded; 49 #endif 50 51 /* 52 * File lock contention is difficult to diagnose without knowing 53 * where locks were set. Allow a debug library to be built which 54 * records the source file and line number of each lock call. 55 */ 56 #ifdef _FLOCK_DEBUG 57 #define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__) 58 #else 59 #define _FLOCKFILE(x) _flockfile(x) 60 #endif 61 62 /* 63 * Macros for locking and unlocking FILEs. These test if the 64 * process is threaded to avoid locking when not required. 65 */ 66 #define FLOCKFILE(fp) if (__isthreaded) _FLOCKFILE(fp) 67 #define FUNLOCKFILE(fp) if (__isthreaded) _funlockfile(fp) 68 69 /* 70 * Initialise TLS static programs 71 */ 72 int __get_errno_GS_offset(void); 73 void *__get_errno_GOT_ptr(void); 74 75 struct statfs; 76 struct statvfs; 77 78 /* 79 * yplib internal interfaces 80 */ 81 #ifdef YP 82 int _yp_check(char **); 83 #endif 84 85 /* 86 * This is a pointer in the C run-time startup code. It is used 87 * by getprogname() and setprogname(). 88 */ 89 extern const char *__progname; 90 91 /* 92 * Notify libc that thread is exiting and its TLS destructors can be called. 93 */ 94 void _thread_finalize(void); 95 96 /* 97 * Function to clean up streams, called from abort() and exit(). 98 */ 99 extern void (*__cleanup)(void); 100 101 /* execve() with PATH processing to implement posix_spawnp() */ 102 int _execvpe(const char *, char * const *, char * const *); 103 void _nmalloc_thr_init(void); 104 void _nmalloc_thr_prepfork(void); 105 void _nmalloc_thr_parentfork(void); 106 void _nmalloc_thr_childfork(void); 107 108 struct dl_phdr_info; 109 int __elf_phdr_match_addr(struct dl_phdr_info *, void *); 110 void __libc_distribute_static_tls(__size_t, void *, __size_t, __size_t); 111 __uintptr_t __libc_static_tls_base(__size_t); 112 113 /* 114 * libc should use libc_dlopen internally, which respects a global 115 * flag where loading of new shared objects can be restricted. 116 */ 117 void *libc_dlopen(const char *, int); 118 119 /* 120 * For dynamic linker 121 */ 122 void _rtld_error(const char *fmt, ...); 123 124 /* 125 * Provides pthread_once()-like functionality for both single-threaded 126 * and multi-threaded applications 127 */ 128 int _once(pthread_once_t *, void (*)(void)); 129 130 void __throw_constraint_handler_s(const char * restrict msg, int error); 131 132 #endif /* _LIBC_PRIVATE_H_ */ 133