htl/forward.c

   1 /* Libc stubs for pthread functions.  Hurd pthread version.
   2    Copyright (C) 2002-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <dlfcn.h>
  21 #include <stdlib.h>
  22 #include <shlib-compat.h>
  23 #include <pthread-functions.h>
  24 #include <libc-lock.h>
  25 #include <pt-internal.h>
  26
  27 /* Pointers to the libc functions.  */
  28 struct pthread_functions __libc_pthread_functions attribute_hidden;
  29 int __libc_pthread_functions_init attribute_hidden;
  30
  31
  32 #define FORWARD2(name, rettype, decl, params, defaction) \
  33 rettype                                                                       \
  34 name decl                                                                     \
  35 {                                                                             \
  36   if (!__libc_pthread_functions_init)                                         \
  37     defaction;                                                                \
  38                                                                               \
  39   return PTHFCT_CALL (ptr_##name, params);                                    \
  40 }
  41
  42 /* Same as FORWARD2, only without return.  */
  43 #define FORWARD_NORETURN(name, rettype, decl, params, defaction) \
  44 rettype                                                                       \
  45 name decl                                                                     \
  46 {                                                                             \
  47   if (!__libc_pthread_functions_init)                                         \
  48     defaction;                                                                \
  49                                                                               \
  50   PTHFCT_CALL (ptr_##name, params);                                           \
  51 }
  52
  53 #define FORWARD(name, decl, params, defretval) \
  54   FORWARD2 (name, int, decl, params, return defretval)
  55
  56 FORWARD (pthread_attr_destroy, (pthread_attr_t *attr), (attr), 0)
  57
  58 FORWARD (pthread_attr_init, (pthread_attr_t *attr), (attr), 0)
  59
  60 FORWARD (pthread_attr_setschedparam,
  61          (pthread_attr_t *attr, const struct sched_param *param),
  62          (attr, param), 0)
  63
  64 FORWARD (pthread_attr_getscope,
  65          (const pthread_attr_t *attr, int *scope), (attr, scope), 0)
  66 FORWARD (pthread_attr_setscope, (pthread_attr_t *attr, int scope),
  67          (attr, scope), 0)
  68
  69
  70 FORWARD (pthread_condattr_destroy, (pthread_condattr_t *attr), (attr), 0)
  71 FORWARD (pthread_condattr_init, (pthread_condattr_t *attr), (attr), 0)
  72
  73
  74 FORWARD (pthread_cond_broadcast, (pthread_cond_t *cond), (cond), 0)
  75 FORWARD (pthread_cond_destroy, (pthread_cond_t *cond), (cond), 0)
  76 FORWARD (pthread_cond_init,
  77          (pthread_cond_t *cond, const pthread_condattr_t *cond_attr),
  78          (cond, cond_attr), 0)
  79 FORWARD (pthread_cond_signal, (pthread_cond_t *cond), (cond), 0)
  80 FORWARD (pthread_cond_wait, (pthread_cond_t *cond, pthread_mutex_t *mutex),
  81          (cond, mutex), 0)
  82 FORWARD (pthread_cond_timedwait,
  83          (pthread_cond_t *cond, pthread_mutex_t *mutex,
  84           const struct timespec *abstime), (cond, mutex, abstime), 0)
  85
  86 /* Use an alias to avoid warning, as pthread_exit is declared noreturn.  */
  87 FORWARD_NORETURN (__pthread_exit, void, (void *retval), (retval),
  88                   exit (EXIT_SUCCESS))
  89 strong_alias (__pthread_exit, pthread_exit);
  90
  91 FORWARD (pthread_mutex_destroy, (pthread_mutex_t *mutex), (mutex), 0)
  92
  93 FORWARD (pthread_mutex_init,
  94          (pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr),
  95          (mutex, mutexattr), 0)
  96
  97 FORWARD (pthread_mutex_lock, (pthread_mutex_t *mutex), (mutex), 0)
  98
  99 FORWARD (pthread_mutex_unlock, (pthread_mutex_t *mutex), (mutex), 0)
 100
 101 FORWARD (__pthread_setcancelstate, (int state, int *oldstate),
 102          (state, oldstate), 0)
 103 strong_alias (__pthread_setcancelstate, pthread_setcancelstate);
 104
 105 FORWARD (pthread_setcanceltype, (int type, int *oldtype), (type, oldtype), 0)
 106
 107 FORWARD2 (__pthread_get_cleanup_stack, struct __pthread_cancelation_handler **,
 108           (void), (), return &__pthread_cleanup_stack);