nptl/forward.c

   1 /* Copyright (C) 2002, 2003, 2004 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <dlfcn.h>
  21 #include <pthreadP.h>
  22 #include <signal.h>
  23 #include <stdlib.h>
  24
  25 #include <shlib-compat.h>
  26 #include <atomic.h>
  27 #include <sysdep.h>
  28
  29
  30 /* Pointers to the libc functions.  */
  31 struct pthread_functions __libc_pthread_functions attribute_hidden;
  32
  33
  34 #define FORWARD2(name, rettype, decl, params, defaction) \
  35 rettype                                                                       \
  36 name decl                                                                     \
  37 {                                                                             \
  38   if (__libc_pthread_functions.ptr_##name == NULL)                            \
  39     defaction;                                                                \
  40                                                                               \
  41   return __libc_pthread_functions.ptr_##name params;                          \
  42 }
  43
  44 #define FORWARD(name, decl, params, defretval) \
  45   FORWARD2 (name, int, decl, params, return defretval)
  46
  47
  48 FORWARD (pthread_attr_destroy, (pthread_attr_t *attr), (attr), 0)
  49
  50 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_1)
  51 FORWARD (__pthread_attr_init_2_0, (pthread_attr_t *attr), (attr), 0)
  52 compat_symbol (libc, __pthread_attr_init_2_0, pthread_attr_init, GLIBC_2_0);
  53 #endif
  54
  55 FORWARD (__pthread_attr_init_2_1, (pthread_attr_t *attr), (attr), 0)
  56 versioned_symbol (libc, __pthread_attr_init_2_1, pthread_attr_init, GLIBC_2_1);
  57
  58 FORWARD (pthread_attr_getdetachstate,
  59          (const pthread_attr_t *attr, int *detachstate), (attr, detachstate),
  60          0)
  61 FORWARD (pthread_attr_setdetachstate, (pthread_attr_t *attr, int detachstate),
  62          (attr, detachstate), 0)
  63
  64 FORWARD (pthread_attr_getinheritsched,
  65          (const pthread_attr_t *attr, int *inherit), (attr, inherit), 0)
  66 FORWARD (pthread_attr_setinheritsched, (pthread_attr_t *attr, int inherit),
  67          (attr, inherit), 0)
  68
  69 FORWARD (pthread_attr_getschedparam,
  70          (const pthread_attr_t *attr, struct sched_param *param),
  71          (attr, param), 0)
  72 FORWARD (pthread_attr_setschedparam,
  73          (pthread_attr_t *attr, const struct sched_param *param),
  74          (attr, param), 0)
  75
  76 FORWARD (pthread_attr_getschedpolicy,
  77          (const pthread_attr_t *attr, int *policy), (attr, policy), 0)
  78 FORWARD (pthread_attr_setschedpolicy, (pthread_attr_t *attr, int policy),
  79          (attr, policy), 0)
  80
  81 FORWARD (pthread_attr_getscope,
  82          (const pthread_attr_t *attr, int *scope), (attr, scope), 0)
  83 FORWARD (pthread_attr_setscope, (pthread_attr_t *attr, int scope),
  84          (attr, scope), 0)
  85
  86
  87 FORWARD (pthread_condattr_destroy, (pthread_condattr_t *attr), (attr), 0)
  88 FORWARD (pthread_condattr_init, (pthread_condattr_t *attr), (attr), 0)
  89
  90 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
  91 FORWARD2 (__pthread_cond_broadcast_2_0, int attribute_compat_text_section,
  92           (pthread_cond_2_0_t *cond), (cond), return 0)
  93 compat_symbol (libc, __pthread_cond_broadcast_2_0, pthread_cond_broadcast,
  94                GLIBC_2_0);
  95 #endif
  96 FORWARD (__pthread_cond_broadcast, (pthread_cond_t *cond), (cond), 0)
  97 versioned_symbol (libc, __pthread_cond_broadcast, pthread_cond_broadcast,
  98                   GLIBC_2_3_2);
  99
 100 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 101 FORWARD2 (__pthread_cond_destroy_2_0, int attribute_compat_text_section,
 102           (pthread_cond_2_0_t *cond), (cond), return 0)
 103 compat_symbol (libc, __pthread_cond_destroy_2_0, pthread_cond_destroy,
 104                GLIBC_2_0);
 105 #endif
 106 FORWARD (__pthread_cond_destroy, (pthread_cond_t *cond), (cond), 0)
 107 versioned_symbol (libc, __pthread_cond_destroy, pthread_cond_destroy,
 108                   GLIBC_2_3_2);
 109
 110 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 111 FORWARD2 (__pthread_cond_init_2_0, int attribute_compat_text_section,
 112           (pthread_cond_2_0_t *cond, const pthread_condattr_t *cond_attr),
 113           (cond, cond_attr), return 0)
 114 compat_symbol (libc, __pthread_cond_init_2_0, pthread_cond_init, GLIBC_2_0);
 115 #endif
 116 FORWARD (__pthread_cond_init,
 117          (pthread_cond_t *cond, const pthread_condattr_t *cond_attr),
 118          (cond, cond_attr), 0)
 119 versioned_symbol (libc, __pthread_cond_init, pthread_cond_init, GLIBC_2_3_2);
 120
 121 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 122 FORWARD2 (__pthread_cond_signal_2_0, int attribute_compat_text_section,
 123           (pthread_cond_2_0_t *cond), (cond), return 0)
 124 compat_symbol (libc, __pthread_cond_signal_2_0, pthread_cond_signal,
 125                GLIBC_2_0);
 126 #endif
 127 FORWARD (__pthread_cond_signal, (pthread_cond_t *cond), (cond), 0)
 128 versioned_symbol (libc, __pthread_cond_signal, pthread_cond_signal,
 129                   GLIBC_2_3_2);
 130
 131 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 132 FORWARD2 (__pthread_cond_wait_2_0, int attribute_compat_text_section,
 133           (pthread_cond_2_0_t *cond, pthread_mutex_t *mutex), (cond, mutex),
 134           return 0)
 135 compat_symbol (libc, __pthread_cond_wait_2_0, pthread_cond_wait,
 136                GLIBC_2_0);
 137 #endif
 138 FORWARD (__pthread_cond_wait, (pthread_cond_t *cond, pthread_mutex_t *mutex),
 139          (cond, mutex), 0)
 140 versioned_symbol (libc, __pthread_cond_wait, pthread_cond_wait,
 141                   GLIBC_2_3_2);
 142
 143 #if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_3_2)
 144 FORWARD2 (__pthread_cond_timedwait_2_0, int attribute_compat_text_section,
 145           (pthread_cond_2_0_t *cond, pthread_mutex_t *mutex,
 146            const struct timespec *abstime), (cond, mutex, abstime),
 147           return 0)
 148 compat_symbol (libc, __pthread_cond_timedwait_2_0, pthread_cond_timedwait,
 149                GLIBC_2_0);
 150 #endif
 151 FORWARD (__pthread_cond_timedwait,
 152          (pthread_cond_t *cond, pthread_mutex_t *mutex,
 153           const struct timespec *abstime), (cond, mutex, abstime), 0)
 154 versioned_symbol (libc, __pthread_cond_timedwait, pthread_cond_timedwait,
 155                   GLIBC_2_3_2);
 156
 157
 158 FORWARD (pthread_equal, (pthread_t thread1, pthread_t thread2),
 159          (thread1, thread2), 1)
 160
 161
 162 /* Use an alias to avoid warning, as pthread_exit is declared noreturn.  */
 163 FORWARD2 (__pthread_exit, void, (void *retval), (retval), exit (EXIT_SUCCESS))
 164 strong_alias (__pthread_exit, pthread_exit);
 165
 166
 167 FORWARD (pthread_getschedparam,
 168          (pthread_t target_thread, int *policy, struct sched_param *param),
 169          (target_thread, policy, param), 0)
 170 FORWARD (pthread_setschedparam,
 171          (pthread_t target_thread, int policy,
 172           const struct sched_param *param), (target_thread, policy, param), 0)
 173
 174
 175 FORWARD (pthread_mutex_destroy, (pthread_mutex_t *mutex), (mutex), 0)
 176
 177 FORWARD (pthread_mutex_init,
 178          (pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr),
 179          (mutex, mutexattr), 0)
 180
 181 FORWARD (pthread_mutex_lock, (pthread_mutex_t *mutex), (mutex), 0)
 182
 183 FORWARD (pthread_mutex_unlock, (pthread_mutex_t *mutex), (mutex), 0)
 184
 185
 186 FORWARD2 (pthread_self, pthread_t, (void), (), return 0)
 187
 188
 189 FORWARD (pthread_setcancelstate, (int state, int *oldstate), (state, oldstate),
 190          0)
 191
 192 FORWARD (pthread_setcanceltype, (int type, int *oldtype), (type, oldtype), 0)
 193
 194 #define return /* value is void */
 195 FORWARD2(__pthread_unwind,
 196          void attribute_hidden __attribute ((noreturn)) __cleanup_fct_attribute
 197          attribute_compat_text_section,
 198          (__pthread_unwind_buf_t *buf), (buf), {
 199                        /* We cannot call abort() here.  */
 200                        INTERNAL_SYSCALL_DECL (err);
 201                        INTERNAL_SYSCALL (kill, err, 1, SIGKILL);
 202                      })
 203 #undef return