gcc/gthr-tpf.h

   1 /* Threads compatibility routines for libgcc2 and libobjc.
   2    Compile this one with gcc.
   3    Copyright (C) 2004, 2005 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  20 02110-1301, 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
  30 /* TPF needs its own version of gthr-*.h because TPF always links to
  31    the thread library.  However, for performance reasons we still do not
  32    want to issue thread api calls unless a check is made to see that we
  33    are running as a thread.  */
  34
  35 #ifndef GCC_GTHR_TPF_H
  36 #define GCC_GTHR_TPF_H
  37
  38 /* POSIX threads specific definitions.
  39    Easy, since the interface is just one-to-one mapping.  */
  40
  41 #define __GTHREADS 1
  42
  43 /* Some implementations of <pthread.h> require this to be defined.  */
  44 #ifndef _REENTRANT
  45 #define _REENTRANT 1
  46 #endif
  47
  48 #include <pthread.h>
  49 #include <unistd.h>
  50
  51 typedef pthread_key_t __gthread_key_t;
  52 typedef pthread_once_t __gthread_once_t;
  53 typedef pthread_mutex_t __gthread_mutex_t;
  54 typedef pthread_mutex_t __gthread_recursive_mutex_t;
  55
  56 #if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
  57 #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER
  58 #elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
  59 #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
  60 #endif
  61
  62 #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
  63 #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
  64
  65 #define NOTATHREAD   00
  66 #define ECBBASEPTR (unsigned long int) *(unsigned int *)0x00000514u
  67 #define ECBPG2PTR  ECBBASEPTR + 0x1000
  68 #define CE2THRCPTR *((unsigned char *)(ECBPG2PTR + 16))
  69 #define __tpf_pthread_active() (CE2THRCPTR != NOTATHREAD)
  70
  71 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
  72 # define __gthrw(name) \
  73   static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)));
  74 # define __gthrw_(name) __gthrw_ ## name
  75 #else
  76 # define __gthrw(name)
  77 # define __gthrw_(name) name
  78 #endif
  79
  80 __gthrw(pthread_once)
  81 __gthrw(pthread_key_create)
  82 __gthrw(pthread_key_delete)
  83 __gthrw(pthread_getspecific)
  84 __gthrw(pthread_setspecific)
  85 __gthrw(pthread_create)
  86
  87 __gthrw(pthread_mutex_lock)
  88 __gthrw(pthread_mutex_trylock)
  89 __gthrw(pthread_mutex_unlock)
  90
  91 static inline int
  92 __gthread_active_p (void)
  93 {
  94   return 1;
  95 }
  96
  97 static inline int
  98 __gthread_once (__gthread_once_t *once, void (*func) (void))
  99 {
 100   if (__tpf_pthread_active ())
 101     return __gthrw_(pthread_once) (once, func);
 102   else
 103     return -1;
 104 }
 105
 106 static inline int
 107 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
 108 {
 109   if (__tpf_pthread_active ())
 110     return __gthrw_(pthread_key_create) (key, dtor);
 111   else
 112     return -1;
 113 }
 114
 115 static inline int
 116 __gthread_key_delete (__gthread_key_t key)
 117 {
 118   if (__tpf_pthread_active ())
 119     return __gthrw_(pthread_key_delete) (key);
 120   else
 121     return -1;
 122 }
 123
 124 static inline void *
 125 __gthread_getspecific (__gthread_key_t key)
 126 {
 127   if (__tpf_pthread_active ())
 128     return __gthrw_(pthread_getspecific) (key);
 129   else
 130     return NULL;
 131 }
 132
 133 static inline int
 134 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 135 {
 136   if (__tpf_pthread_active ())
 137     return __gthrw_(pthread_setspecific) (key, ptr);
 138   else
 139     return -1;
 140 }
 141
 142 static inline int
 143 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 144 {
 145   if (__tpf_pthread_active ())
 146     return __gthrw_(pthread_mutex_lock) (mutex);
 147   else
 148     return 0;
 149 }
 150
 151 static inline int
 152 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 153 {
 154   if (__tpf_pthread_active ())
 155     return __gthrw_(pthread_mutex_trylock) (mutex);
 156   else
 157     return 0;
 158 }
 159
 160 static inline int
 161 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 162 {
 163   if (__tpf_pthread_active ())
 164     return __gthrw_(pthread_mutex_unlock) (mutex);
 165   else
 166     return 0;
 167 }
 168
 169 static inline int
 170 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
 171 {
 172   if (__tpf_pthread_active ())
 173     return __gthread_mutex_lock (mutex);
 174   else
 175     return 0;
 176 }
 177
 178 static inline int
 179 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
 180 {
 181   if (__tpf_pthread_active ())
 182     return __gthread_mutex_trylock (mutex);
 183   else
 184     return 0;
 185 }
 186
 187 static inline int
 188 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
 189 {
 190   if (__tpf_pthread_active ())
 191     return __gthread_mutex_unlock (mutex);
 192   else
 193     return 0;
 194 }
 195
 196 #endif /* ! GCC_GTHR_TPF_H */