gcc/gthr-dce.h

   1
   2 /* Compile this one with gcc.  */
   3 /* Copyright (C) 1997 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* As a special exception, if you link this library with other files,
  23    some of which are compiled with GCC, to produce an executable,
  24    this library does not by itself cause the resulting executable
  25    to be covered by the GNU General Public License.
  26    This exception does not however invalidate any other reasons why
  27    the executable file might be covered by the GNU General Public License.  */
  28
  29 #ifndef __gthr_dce_h
  30 #define __gthr_dce_h
  31
  32 /* DCE threads interface.
  33    DCE threads are based on POSIX threads draft 4, and many things
  34    have changed since then. */
  35
  36 #define __GTHREADS 1
  37
  38 #include <pthread.h>
  39
  40 typedef pthread_key_t __gthread_key_t;
  41 typedef pthread_once_t __gthread_once_t;
  42 typedef pthread_mutex_t __gthread_mutex_t;
  43
  44 #define __GTHREAD_ONCE_INIT pthread_once_init
  45 /* Howto define __GTHREAD_MUTEX_INIT? */
  46
  47 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
  48
  49 #pragma weak pthread_once
  50 #pragma weak pthread_once_init
  51 #pragma weak pthread_key_create
  52 #pragma weak pthread_key_delete
  53 #pragma weak pthread_getspecific
  54 #pragma weak pthread_setspecific
  55 #pragma weak pthread_create
  56
  57 #pragma weak pthread_mutex_lock
  58 #pragma weak pthread_mutex_trylock
  59 #pragma weak pthread_mutex_unlock
  60
  61 static void *__gthread_active_ptr = &pthread_create;
  62
  63 static inline int
  64 __gthread_active_p ()
  65 {
  66   return __gthread_active_ptr != 0;
  67 }
  68
  69 #else /* not SUPPORTS_WEAK */
  70
  71 static inline int
  72 __gthread_active_p ()
  73 {
  74   return 1;
  75 }
  76
  77 #endif /* SUPPORTS_WEAK */
  78
  79 static inline int
  80 __gthread_once (__gthread_once_t *once, void (*func) ())
  81 {
  82   if (__gthread_active_p ())
  83     return pthread_once (once, func);
  84   else
  85     return -1;
  86 }
  87
  88 static inline int
  89 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
  90 {
  91   return pthread_keycreate (key, dtor);
  92 }
  93
  94 static inline int
  95 __gthread_key_dtor (__gthread_key_t key, void *ptr)
  96 {
  97   /* Nothing needed. */
  98   return 0;
  99 }
 100
 101 static inline int
 102 __gthread_key_delete (__gthread_key_t key)
 103 {
 104   return pthread_key_delete (key);
 105 }
 106
 107 static inline void *
 108 __gthread_getspecific (__gthread_key_t key)
 109 {
 110   void *ptr;
 111   if (pthread_getspecific (key, &ptr) == 0)
 112     return ptr;
 113   else
 114     return 0;
 115 }
 116
 117 static inline int
 118 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 119 {
 120   return pthread_setspecific (key, (void *) ptr);
 121 }
 122
 123 static inline int
 124 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 125 {
 126   if (__gthread_active_p ())
 127     return pthread_mutex_lock (mutex);
 128   else
 129     return 0;
 130 }
 131
 132 static inline int
 133 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 134 {
 135   if (__gthread_active_p ())
 136     return pthread_mutex_trylock (mutex);
 137   else
 138     return 0;
 139 }
 140
 141 static inline int
 142 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 143 {
 144   if (__gthread_active_p ())
 145     return pthread_mutex_unlock (mutex);
 146   else
 147     return 0;
 148 }
 149
 150 #endif /* not __gthr_dce_h */