gcc/gthr-tpf.h

   1 /* Threads compatibility routines for libgcc2 and libobjc.
   2    Compile this one with gcc.
   3    Copyright (C) 2004, 2005, 2008, 2009 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 3, 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 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 /* TPF needs its own version of gthr-*.h because TPF always links to
  27    the thread library.  However, for performance reasons we still do not
  28    want to issue thread api calls unless a check is made to see that we
  29    are running as a thread.  */
  30
  31 #ifndef GCC_GTHR_TPF_H
  32 #define GCC_GTHR_TPF_H
  33
  34 /* POSIX threads specific definitions.
  35    Easy, since the interface is just one-to-one mapping.  */
  36
  37 #define __GTHREADS 1
  38
  39 /* Some implementations of <pthread.h> require this to be defined.  */
  40 #ifndef _REENTRANT
  41 #define _REENTRANT 1
  42 #endif
  43
  44 #include <pthread.h>
  45 #include <unistd.h>
  46
  47 typedef pthread_key_t __gthread_key_t;
  48 typedef pthread_once_t __gthread_once_t;
  49 typedef pthread_mutex_t __gthread_mutex_t;
  50 typedef pthread_mutex_t __gthread_recursive_mutex_t;
  51
  52 #if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
  53 #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER
  54 #elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
  55 #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
  56 #endif
  57
  58 #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
  59 #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
  60 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
  61
  62 #define NOTATHREAD   00
  63 #define ECBBASEPTR (unsigned long int) *(unsigned int *)0x00000514u
  64 #define ECBPG2PTR  ECBBASEPTR + 0x1000
  65 #define CE2THRCPTR *((unsigned char *)(ECBPG2PTR + 16))
  66 #define __tpf_pthread_active() (CE2THRCPTR != NOTATHREAD)
  67
  68 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
  69 # define __gthrw(name) \
  70   static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)));
  71 # define __gthrw_(name) __gthrw_ ## name
  72 #else
  73 # define __gthrw(name)
  74 # define __gthrw_(name) name
  75 #endif
  76
  77 __gthrw(pthread_once)
  78 __gthrw(pthread_key_create)
  79 __gthrw(pthread_key_delete)
  80 __gthrw(pthread_getspecific)
  81 __gthrw(pthread_setspecific)
  82 __gthrw(pthread_create)
  83
  84 __gthrw(pthread_mutex_lock)
  85 __gthrw(pthread_mutex_trylock)
  86 __gthrw(pthread_mutex_unlock)
  87 __gthrw(pthread_mutexattr_init)
  88 __gthrw(pthread_mutexattr_settype)
  89 __gthrw(pthread_mutexattr_destroy)
  90 __gthrw(pthread_mutex_init)
  91 __gthrw(pthread_mutex_destroy)
  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_destroy (__gthread_mutex_t *__mutex)
 146 {
 147   if (__tpf_pthread_active ())
 148     return __gthrw_(pthread_mutex_destroy) (__mutex);
 149   else
 150     return 0;
 151 }
 152
 153 static inline int
 154 __gthread_mutex_lock (__gthread_mutex_t *__mutex)
 155 {
 156   if (__tpf_pthread_active ())
 157     return __gthrw_(pthread_mutex_lock) (__mutex);
 158   else
 159     return 0;
 160 }
 161
 162 static inline int
 163 __gthread_mutex_trylock (__gthread_mutex_t *__mutex)
 164 {
 165   if (__tpf_pthread_active ())
 166     return __gthrw_(pthread_mutex_trylock) (__mutex);
 167   else
 168     return 0;
 169 }
 170
 171 static inline int
 172 __gthread_mutex_unlock (__gthread_mutex_t *__mutex)
 173 {
 174   if (__tpf_pthread_active ())
 175     return __gthrw_(pthread_mutex_unlock) (__mutex);
 176   else
 177     return 0;
 178 }
 179
 180 static inline int
 181 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
 182 {
 183   if (__tpf_pthread_active ())
 184     return __gthread_mutex_lock (__mutex);
 185   else
 186     return 0;
 187 }
 188
 189 static inline int
 190 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
 191 {
 192   if (__tpf_pthread_active ())
 193     return __gthread_mutex_trylock (__mutex);
 194   else
 195     return 0;
 196 }
 197
 198 static inline int
 199 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
 200 {
 201   if (__tpf_pthread_active ())
 202     return __gthread_mutex_unlock (__mutex);
 203   else
 204     return 0;
 205 }
 206
 207 static inline int
 208 __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
 209 {
 210   if (__tpf_pthread_active ())
 211     {
 212       pthread_mutexattr_t __attr;
 213       int __r;
 214
 215       __r = __gthrw_(pthread_mutexattr_init) (&__attr);
 216       if (!__r)
 217         __r = __gthrw_(pthread_mutexattr_settype) (&__attr,
 218                                                    PTHREAD_MUTEX_RECURSIVE);
 219       if (!__r)
 220         __r = __gthrw_(pthread_mutex_init) (__mutex, &__attr);
 221       if (!__r)
 222         __r = __gthrw_(pthread_mutexattr_destroy) (&__attr);
 223       return __r;
 224     }
 225   return 0;
 226 }
 227
 228
 229 #endif /* ! GCC_GTHR_TPF_H */