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   extern __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)))
  74 #else
  75 # define __gthrw_asmname(cname) __gthrw_asmnamep (__USER_LABEL_PREFIX__, cname)
  76 # define __gthrw_asmnamep(prefix, cname) __gthrw_string (prefix) cname
  77 # define __gthrw_string(x) #x
  78 # define __gthrw(name) \
  79   extern __typeof(name) __gthrw_ ## name __asm (__gthrw_asmname (#name))
  80 #endif
  81
  82 __gthrw(pthread_once);
  83 __gthrw(pthread_key_create);
  84 __gthrw(pthread_key_delete);
  85 __gthrw(pthread_getspecific);
  86 __gthrw(pthread_setspecific);
  87 __gthrw(pthread_create);
  88
  89 __gthrw(pthread_mutex_lock);
  90 __gthrw(pthread_mutex_trylock);
  91 __gthrw(pthread_mutex_unlock);
  92
  93 static inline int
  94 __gthread_active_p (void)
  95 {
  96   return 1;
  97 }
  98
  99 static inline int
 100 __gthread_once (__gthread_once_t *once, void (*func) (void))
 101 {
 102   if (__tpf_pthread_active ())
 103     return __gthrw_pthread_once (once, func);
 104   else
 105     return -1;
 106 }
 107
 108 static inline int
 109 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
 110 {
 111   if (__tpf_pthread_active ())
 112     return __gthrw_pthread_key_create (key, dtor);
 113   else
 114     return -1;
 115 }
 116
 117 static inline int
 118 __gthread_key_delete (__gthread_key_t key)
 119 {
 120   if (__tpf_pthread_active ())
 121     return __gthrw_pthread_key_delete (key);
 122   else
 123     return -1;
 124 }
 125
 126 static inline void *
 127 __gthread_getspecific (__gthread_key_t key)
 128 {
 129   if (__tpf_pthread_active ())
 130     return __gthrw_pthread_getspecific (key);
 131   else
 132     return NULL;
 133 }
 134
 135 static inline int
 136 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 137 {
 138   if (__tpf_pthread_active ())
 139     return __gthrw_pthread_setspecific (key, ptr);
 140   else
 141     return -1;
 142 }
 143
 144 static inline int
 145 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 146 {
 147   if (__tpf_pthread_active ())
 148     return __gthrw_pthread_mutex_lock (mutex);
 149   else
 150     return 0;
 151 }
 152
 153 static inline int
 154 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 155 {
 156   if (__tpf_pthread_active ())
 157     return __gthrw_pthread_mutex_trylock (mutex);
 158   else
 159     return 0;
 160 }
 161
 162 static inline int
 163 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 164 {
 165   if (__tpf_pthread_active ())
 166     return __gthrw_pthread_mutex_unlock (mutex);
 167   else
 168     return 0;
 169 }
 170
 171 static inline int
 172 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
 173 {
 174   if (__tpf_pthread_active ())
 175     return __gthread_mutex_lock (mutex);
 176   else
 177     return 0;
 178 }
 179
 180 static inline int
 181 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
 182 {
 183   if (__tpf_pthread_active ())
 184     return __gthread_mutex_trylock (mutex);
 185   else
 186     return 0;
 187 }
 188
 189 static inline int
 190 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
 191 {
 192   if (__tpf_pthread_active ())
 193     return __gthread_mutex_unlock (mutex);
 194   else
 195     return 0;
 196 }
 197
 198 #endif /* ! GCC_GTHR_TPF_H */