libpthread/nptl/forward.c

   1 /* Copyright (C) 2002, 2003, 2004, 2007 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 <dlfcn.h>
  20 #include <pthreadP.h>
  21 #include <signal.h>
  22 #include <stdlib.h>
  23
  24 #include <atomic.h>
  25 #include <sysdep.h>
  26
  27
  28 /* Pointers to the libc functions.  */
  29 struct pthread_functions __libc_pthread_functions attribute_hidden;
  30 int __libc_pthread_functions_init attribute_hidden;
  31
  32
  33 #define FORWARD2(name, rettype, decl, params, defaction) \
  34 rettype                                                                       \
  35 name decl                                                                     \
  36 {                                                                             \
  37   if (!__libc_pthread_functions_init) {                                       \
  38     defaction;                                                                \
  39   } else {                                                                    \
  40     return PTHFCT_CALL (ptr_##name, params);                                  \
  41   }                                                                           \
  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 FORWARD (__pthread_attr_init_2_1, (pthread_attr_t *attr), (attr), 0)
  51 weak_alias(__pthread_attr_init_2_1, pthread_attr_init)
  52
  53 FORWARD (pthread_attr_getdetachstate,
  54          (const pthread_attr_t *attr, int *detachstate), (attr, detachstate),
  55          0)
  56 FORWARD (pthread_attr_setdetachstate, (pthread_attr_t *attr, int detachstate),
  57          (attr, detachstate), 0)
  58
  59 FORWARD (pthread_attr_getinheritsched,
  60          (const pthread_attr_t *attr, int *inherit), (attr, inherit), 0)
  61 FORWARD (pthread_attr_setinheritsched, (pthread_attr_t *attr, int inherit),
  62          (attr, inherit), 0)
  63
  64 FORWARD (pthread_attr_getschedparam,
  65          (const pthread_attr_t *attr, struct sched_param *param),
  66          (attr, param), 0)
  67 FORWARD (pthread_attr_setschedparam,
  68          (pthread_attr_t *attr, const struct sched_param *param),
  69          (attr, param), 0)
  70
  71 FORWARD (pthread_attr_getschedpolicy,
  72          (const pthread_attr_t *attr, int *policy), (attr, policy), 0)
  73 FORWARD (pthread_attr_setschedpolicy, (pthread_attr_t *attr, int policy),
  74          (attr, policy), 0)
  75
  76 FORWARD (pthread_attr_getscope,
  77          (const pthread_attr_t *attr, int *scope), (attr, scope), 0)
  78 FORWARD (pthread_attr_setscope, (pthread_attr_t *attr, int scope),
  79          (attr, scope), 0)
  80
  81
  82 FORWARD (pthread_condattr_destroy, (pthread_condattr_t *attr), (attr), 0)
  83 FORWARD (pthread_condattr_init, (pthread_condattr_t *attr), (attr), 0)
  84
  85 FORWARD (__pthread_cond_broadcast, (pthread_cond_t *cond), (cond), 0)
  86 weak_alias(__pthread_cond_broadcast, pthread_cond_broadcast)
  87
  88 FORWARD (__pthread_cond_destroy, (pthread_cond_t *cond), (cond), 0)
  89 weak_alias(__pthread_cond_destroy, pthread_cond_destroy)
  90
  91 FORWARD (__pthread_cond_init,
  92          (pthread_cond_t *cond, const pthread_condattr_t *cond_attr),
  93          (cond, cond_attr), 0)
  94 weak_alias(__pthread_cond_init, pthread_cond_init)
  95
  96 FORWARD (__pthread_cond_signal, (pthread_cond_t *cond), (cond), 0)
  97 weak_alias(__pthread_cond_signal, pthread_cond_signal)
  98
  99 FORWARD (__pthread_cond_wait, (pthread_cond_t *cond, pthread_mutex_t *mutex),
 100          (cond, mutex), 0)
 101 weak_alias(__pthread_cond_wait, pthread_cond_wait)
 102
 103 FORWARD (__pthread_cond_timedwait,
 104          (pthread_cond_t *cond, pthread_mutex_t *mutex,
 105           const struct timespec *abstime), (cond, mutex, abstime), 0)
 106 weak_alias(__pthread_cond_timedwait, pthread_cond_timedwait)
 107
 108
 109 FORWARD (pthread_equal, (pthread_t thread1, pthread_t thread2),
 110          (thread1, thread2), 1)
 111
 112
 113 /* Use an alias to avoid warning, as pthread_exit is declared noreturn.  */
 114 FORWARD2 (__pthread_exit, void, (void *retval), (retval), exit (EXIT_SUCCESS))
 115 strong_alias (__pthread_exit, pthread_exit);
 116
 117
 118 FORWARD (pthread_getschedparam,
 119          (pthread_t target_thread, int *policy, struct sched_param *param),
 120          (target_thread, policy, param), 0)
 121 FORWARD (pthread_setschedparam,
 122          (pthread_t target_thread, int policy,
 123           const struct sched_param *param), (target_thread, policy, param), 0)
 124
 125
 126 FORWARD (pthread_mutex_destroy, (pthread_mutex_t *mutex), (mutex), 0)
 127
 128 FORWARD (pthread_mutex_init,
 129          (pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr),
 130          (mutex, mutexattr), 0)
 131
 132 FORWARD (pthread_mutex_lock, (pthread_mutex_t *mutex), (mutex), 0)
 133 weak_alias (pthread_mutex_lock, __pthread_mutex_lock)
 134
 135 FORWARD (pthread_mutex_unlock, (pthread_mutex_t *mutex), (mutex), 0)
 136 weak_alias (pthread_mutex_unlock, __pthread_mutex_unlock)
 137
 138 FORWARD2 (pthread_self, pthread_t, (void), (), return 0)
 139
 140
 141 FORWARD (pthread_setcancelstate, (int state, int *oldstate), (state, oldstate),
 142          0)
 143
 144 FORWARD (pthread_setcanceltype, (int type, int *oldtype), (type, oldtype), 0)
 145
 146 #define return /* value is void */
 147 FORWARD2(_pthread_cleanup_push_defer,
 148          void, (struct _pthread_cleanup_buffer *buffer, void (*routine)(void *), void *arg),
 149          (buffer, routine, arg),
 150          { buffer->__routine = routine; buffer->__arg = arg; });
 151
 152 FORWARD2(_pthread_cleanup_pop_restore,
 153          void, (struct _pthread_cleanup_buffer *buffer, int execute),
 154          (buffer, execute),
 155          if (execute) { buffer->__routine(buffer->__arg); });
 156
 157 FORWARD2(__pthread_unwind,
 158          void attribute_hidden __attribute ((noreturn)) __cleanup_fct_attribute,
 159          (__pthread_unwind_buf_t *buf), (buf), {
 160                        /* We cannot call abort() here.  */
 161                        INTERNAL_SYSCALL_DECL (err);
 162                        INTERNAL_SYSCALL (kill, err, 1, SIGKILL);
 163 #if __GNUC_PREREQ(4, 5)
 164                        __builtin_unreachable();
 165 #else
 166                         while(1);
 167 #endif
 168                      })
 169 #undef return