gcc/gthr-tpf.h

   1 /* Threads compatibility routines for libgcc2 and libobjc.
   2    Compile this one with gcc.
   3    Copyright (C) 2004 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, 59 Temple Place - Suite 330, Boston, MA
  20 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
  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
  55 #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
  56 #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
  57
  58 #define NOTATHREAD   00
  59 #define ECBBASEPTR (unsigned long int) *(unsigned int *)0x00000514u
  60 #define ECBPG2PTR  ECBBASEPTR + 0x1000
  61 #define CE2THRCPTR *((unsigned char *)(ECBPG2PTR + 208))
  62 #define __tpf_pthread_active() (CE2THRCPTR != NOTATHREAD)
  63
  64 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
  65
  66 #pragma weak pthread_once
  67 #pragma weak pthread_key_create
  68 #pragma weak pthread_key_delete
  69 #pragma weak pthread_getspecific
  70 #pragma weak pthread_setspecific
  71 #pragma weak pthread_create
  72
  73 #pragma weak pthread_mutex_lock
  74 #pragma weak pthread_mutex_trylock
  75 #pragma weak pthread_mutex_unlock
  76
  77 #endif /* SUPPORTS_WEAK */
  78
  79 static inline int
  80 __gthread_active_p (void)
  81 {
  82   return 1;
  83 }
  84
  85 static inline int
  86 __gthread_once (__gthread_once_t *once, void (*func) (void))
  87 {
  88   if (__tpf_pthread_active ())
  89     return pthread_once (once, func);
  90   else
  91     return -1;
  92 }
  93
  94 static inline int
  95 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
  96 {
  97   if (__tpf_pthread_active ())
  98     return pthread_key_create (key, dtor);
  99   else
 100     return -1;
 101 }
 102
 103 static inline int
 104 __gthread_key_delete (__gthread_key_t key)
 105 {
 106   if (__tpf_pthread_active ())
 107     return pthread_key_delete (key);
 108   else
 109     return -1;
 110 }
 111
 112 static inline void *
 113 __gthread_getspecific (__gthread_key_t key)
 114 {
 115   if (__tpf_pthread_active ())
 116     return pthread_getspecific (key);
 117   else
 118     return NULL;
 119 }
 120
 121 static inline int
 122 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 123 {
 124   if (__tpf_pthread_active ())
 125     return pthread_setspecific (key, ptr);
 126   else
 127     return -1;
 128 }
 129
 130 static inline int
 131 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 132 {
 133   if (__tpf_pthread_active ())
 134     return pthread_mutex_lock (mutex);
 135   else
 136     return 0;
 137 }
 138
 139 static inline int
 140 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 141 {
 142   if (__tpf_pthread_active ())
 143     return pthread_mutex_trylock (mutex);
 144   else
 145     return 0;
 146 }
 147
 148 static inline int
 149 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 150 {
 151   if (__tpf_pthread_active ())
 152     return pthread_mutex_unlock (mutex);
 153   else
 154     return 0;
 155 }
 156
 157 #endif /* ! GCC_GTHR_TPF_H */