libpthread/linuxthreads/forward.c

   1 /* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <features.h>
  20 #include <stdlib.h>
  21 #include <dlfcn.h>
  22
  23 /* psm: keep this before internals.h */
  24 #if 0
  25 vda: here is why:
  26 headers contain libc_hidden_proto(foo).
  27 In libpthread/linuxthreads/sysdeps/pthread/bits/libc-lock.h
  28 adding libc_hidden_proto(foo) just before weak_extern (__pthread_initialize)
  29 will not warn:
  30     /* libc_hidden_proto(foo) */
  31     weak_extern (__pthread_initialize)
  32     /* libc_hidden_proto(foo) */
  33 but adding after will! Which is extremely strange -
  34 weak_extern expands into just "#pragma weak __pthread_initialize".
  35 TODO: determine whether it is a gcc bug or what
  36 (see gcc.gnu.org/PR36282).
  37 For now, just include all headers before internals.h
  38 (they are again included in internals.h - maybe remove them there later)
  39 #endif
  40
  41 #include <string.h>
  42 #include <limits.h>
  43 #include <setjmp.h>
  44 #include <signal.h>
  45 #include <unistd.h>
  46 #include <sys/types.h>
  47 #include <sys/wait.h>
  48 #include <sys/time.h>
  49
  50 #include "internals.h"
  51
  52 /* Pointers to the libc functions.  */
  53 struct pthread_functions __libc_pthread_functions attribute_hidden;
  54
  55
  56 # define FORWARD2(name, rettype, decl, params, defaction) \
  57 rettype                                                                       \
  58 name decl                                                                     \
  59 {                                                                             \
  60   if (__libc_pthread_functions.ptr_##name == NULL)                            \
  61     defaction;                                                                \
  62                                                                               \
  63   return __libc_pthread_functions.ptr_##name params;                          \
  64 }
  65
  66 # define FORWARD(name, decl, params, defretval) \
  67   FORWARD2 (name, int, decl, params, return defretval)
  68
  69 FORWARD (pthread_attr_destroy, (pthread_attr_t *attr), (attr), 0)
  70
  71 FORWARD (pthread_attr_init, (pthread_attr_t *attr), (attr), 0)
  72
  73 FORWARD (pthread_attr_getdetachstate,
  74          (const pthread_attr_t *attr, int *detachstate), (attr, detachstate),
  75          0)
  76 FORWARD (pthread_attr_setdetachstate, (pthread_attr_t *attr, int detachstate),
  77          (attr, detachstate), 0)
  78
  79 FORWARD (pthread_attr_getinheritsched,
  80          (const pthread_attr_t *attr, int *inherit), (attr, inherit), 0)
  81 FORWARD (pthread_attr_setinheritsched, (pthread_attr_t *attr, int inherit),
  82          (attr, inherit), 0)
  83
  84 FORWARD (pthread_attr_getschedparam,
  85          (const pthread_attr_t *attr, struct sched_param *param),
  86          (attr, param), 0)
  87 FORWARD (pthread_attr_setschedparam,
  88          (pthread_attr_t *attr, const struct sched_param *param),
  89          (attr, param), 0)
  90
  91 FORWARD (pthread_attr_getschedpolicy,
  92          (const pthread_attr_t *attr, int *policy), (attr, policy), 0)
  93 FORWARD (pthread_attr_setschedpolicy, (pthread_attr_t *attr, int policy),
  94          (attr, policy), 0)
  95
  96 FORWARD (pthread_attr_getscope,
  97          (const pthread_attr_t *attr, int *scope), (attr, scope), 0)
  98 FORWARD (pthread_attr_setscope, (pthread_attr_t *attr, int scope),
  99          (attr, scope), 0)
 100
 101
 102 FORWARD (pthread_condattr_destroy, (pthread_condattr_t *attr), (attr), 0)
 103 FORWARD (pthread_condattr_init, (pthread_condattr_t *attr), (attr), 0)
 104
 105
 106 FORWARD (pthread_cond_broadcast, (pthread_cond_t *cond), (cond), 0)
 107
 108 FORWARD (pthread_cond_destroy, (pthread_cond_t *cond), (cond), 0)
 109
 110 FORWARD (pthread_cond_init,
 111          (pthread_cond_t *cond, const pthread_condattr_t *cond_attr),
 112          (cond, cond_attr), 0)
 113
 114 FORWARD (pthread_cond_signal, (pthread_cond_t *cond), (cond), 0)
 115
 116 FORWARD (pthread_cond_wait, (pthread_cond_t *cond, pthread_mutex_t *mutex),
 117          (cond, mutex), 0)
 118
 119 FORWARD (pthread_cond_timedwait,
 120          (pthread_cond_t *cond, pthread_mutex_t *mutex,
 121           const struct timespec *abstime), (cond, mutex, abstime), 0)
 122
 123
 124 FORWARD (pthread_equal, (pthread_t thread1, pthread_t thread2),
 125          (thread1, thread2), 1)
 126
 127
 128 /* Use an alias to avoid warning, as pthread_exit is declared noreturn.  */
 129 FORWARD2 (__pthread_exit, void, (void *retval), (retval), exit (EXIT_SUCCESS))
 130 strong_alias (__pthread_exit, pthread_exit)
 131
 132
 133 FORWARD (pthread_getschedparam,
 134          (pthread_t target_thread, int *policy, struct sched_param *param),
 135          (target_thread, policy, param), 0)
 136 FORWARD (pthread_setschedparam,
 137          (pthread_t target_thread, int policy,
 138           const struct sched_param *param), (target_thread, policy, param), 0)
 139
 140
 141 FORWARD (pthread_mutex_destroy, (pthread_mutex_t *mutex), (mutex), 0)
 142
 143 FORWARD (pthread_mutex_init,
 144          (pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr),
 145          (mutex, mutexattr), 0)
 146 strong_alias(pthread_mutex_init, __pthread_mutex_init)
 147
 148 FORWARD (pthread_mutex_lock, (pthread_mutex_t *mutex), (mutex), 0)
 149 strong_alias(pthread_mutex_lock, __pthread_mutex_lock)
 150
 151 FORWARD (pthread_mutex_trylock, (pthread_mutex_t *mutex), (mutex), 0)
 152 strong_alias(pthread_mutex_trylock, __pthread_mutex_trylock)
 153
 154 FORWARD (pthread_mutex_unlock, (pthread_mutex_t *mutex), (mutex), 0)
 155 strong_alias(pthread_mutex_unlock, __pthread_mutex_unlock)
 156
 157 FORWARD2 (pthread_self, pthread_t, (void), (), return 0)
 158
 159
 160 FORWARD (pthread_setcancelstate, (int state, int *oldstate), (state, oldstate),
 161          0)
 162
 163 FORWARD (pthread_setcanceltype, (int type, int *oldtype), (type, oldtype), 0)
 164
 165 #if 0
 166 FORWARD2 (_pthread_cleanup_push, void, (struct _pthread_cleanup_buffer * buffer, void (*routine)(void *), void * arg), (buffer, routine, arg), return)
 167 #endif
 168 FORWARD2 (_pthread_cleanup_push_defer, void, (struct _pthread_cleanup_buffer * buffer, void (*routine)(void *), void * arg), (buffer, routine, arg), return)
 169
 170 #if 0
 171 FORWARD2 (_pthread_cleanup_pop, void, (struct _pthread_cleanup_buffer * buffer, int execute), (buffer, execute), return)
 172 #endif
 173 FORWARD2 (_pthread_cleanup_pop_restore, void, (struct _pthread_cleanup_buffer * buffer, int execute), (buffer, execute), return)