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 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
  65
  66 #define NOTATHREAD   00
  67 #define ECBBASEPTR (unsigned long int) *(unsigned int *)0x00000514u
  68 #define ECBPG2PTR  ECBBASEPTR + 0x1000
  69 #define CE2THRCPTR *((unsigned char *)(ECBPG2PTR + 16))
  70 #define __tpf_pthread_active() (CE2THRCPTR != NOTATHREAD)
  71
  72 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
  73 # define __gthrw(name) \
  74   static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)));
  75 # define __gthrw_(name) __gthrw_ ## name
  76 #else
  77 # define __gthrw(name)
  78 # define __gthrw_(name) name
  79 #endif
  80
  81 __gthrw(pthread_once)
  82 __gthrw(pthread_key_create)
  83 __gthrw(pthread_key_delete)
  84 __gthrw(pthread_getspecific)
  85 __gthrw(pthread_setspecific)
  86 __gthrw(pthread_create)
  87
  88 __gthrw(pthread_mutex_lock)
  89 __gthrw(pthread_mutex_trylock)
  90 __gthrw(pthread_mutex_unlock)
  91 __gthrw(pthread_mutexattr_init)
  92 __gthrw(pthread_mutexattr_settype)
  93 __gthrw(pthread_mutexattr_destroy)
  94 __gthrw(pthread_mutex_init)
  95 __gthrw(pthread_mutex_destroy)
  96
  97 static inline int
  98 __gthread_active_p (void)
  99 {
 100   return 1;
 101 }
 102
 103 static inline int
 104 __gthread_once (__gthread_once_t *once, void (*func) (void))
 105 {
 106   if (__tpf_pthread_active ())
 107     return __gthrw_(pthread_once) (once, func);
 108   else
 109     return -1;
 110 }
 111
 112 static inline int
 113 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
 114 {
 115   if (__tpf_pthread_active ())
 116     return __gthrw_(pthread_key_create) (key, dtor);
 117   else
 118     return -1;
 119 }
 120
 121 static inline int
 122 __gthread_key_delete (__gthread_key_t key)
 123 {
 124   if (__tpf_pthread_active ())
 125     return __gthrw_(pthread_key_delete) (key);
 126   else
 127     return -1;
 128 }
 129
 130 static inline void *
 131 __gthread_getspecific (__gthread_key_t key)
 132 {
 133   if (__tpf_pthread_active ())
 134     return __gthrw_(pthread_getspecific) (key);
 135   else
 136     return NULL;
 137 }
 138
 139 static inline int
 140 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 141 {
 142   if (__tpf_pthread_active ())
 143     return __gthrw_(pthread_setspecific) (key, ptr);
 144   else
 145     return -1;
 146 }
 147
 148 static inline int
 149 __gthread_mutex_destroy (__gthread_mutex_t *mutex)
 150 {
 151   if (__tpf_pthread_active ())
 152     return __gthrw_(pthread_mutex_destroy) (mutex);
 153   else
 154     return 0;
 155 }
 156
 157 static inline int
 158 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 159 {
 160   if (__tpf_pthread_active ())
 161     return __gthrw_(pthread_mutex_lock) (mutex);
 162   else
 163     return 0;
 164 }
 165
 166 static inline int
 167 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 168 {
 169   if (__tpf_pthread_active ())
 170     return __gthrw_(pthread_mutex_trylock) (mutex);
 171   else
 172     return 0;
 173 }
 174
 175 static inline int
 176 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 177 {
 178   if (__tpf_pthread_active ())
 179     return __gthrw_(pthread_mutex_unlock) (mutex);
 180   else
 181     return 0;
 182 }
 183
 184 static inline int
 185 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
 186 {
 187   if (__tpf_pthread_active ())
 188     return __gthread_mutex_lock (mutex);
 189   else
 190     return 0;
 191 }
 192
 193 static inline int
 194 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
 195 {
 196   if (__tpf_pthread_active ())
 197     return __gthread_mutex_trylock (mutex);
 198   else
 199     return 0;
 200 }
 201
 202 static inline int
 203 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
 204 {
 205   if (__tpf_pthread_active ())
 206     return __gthread_mutex_unlock (mutex);
 207   else
 208     return 0;
 209 }
 210
 211 static inline int
 212 __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
 213 {
 214   if (__tpf_pthread_active ())
 215     {
 216       pthread_mutexattr_t attr;
 217       int r;
 218
 219       r = __gthrw_(pthread_mutexattr_init) (&attr);
 220       if (!r)
 221         r = __gthrw_(pthread_mutexattr_settype) (&attr, PTHREAD_MUTEX_RECURSIVE);
 222       if (!r)
 223         r = __gthrw_(pthread_mutex_init) (mutex, &attr);
 224       if (!r)
 225         r = __gthrw_(pthread_mutexattr_destroy) (&attr);
 226       return r;
 227     }
 228   return 0;
 229 }
 230
 231
 232 #endif /* ! GCC_GTHR_TPF_H */