gcc/gthr-rtems.h

   1 /* RTEMS threads compatibily routines for libgcc2 and libobjc.
   2    by: Rosimildo da Silva( rdasilva@connecttel.com ) */
   3 /* Compile this one with gcc.  */
   4 /* Copyright (C) 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 2, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to the Free
  20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21 02111-1307, USA.  */
  22
  23 /* As a special exception, if you link this library with other files,
  24    some of which are compiled with GCC, to produce an executable,
  25    this library does not by itself cause the resulting executable
  26    to be covered by the GNU General Public License.
  27    This exception does not however invalidate any other reasons why
  28    the executable file might be covered by the GNU General Public License.  */
  29
  30 #ifndef GCC_GTHR_RTEMS_H
  31 #define GCC_GTHR_RTEMS_H
  32
  33 #ifdef __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 #define __GTHREADS 1
  38
  39 #define __GTHREAD_ONCE_INIT  0
  40 #define __GTHREAD_MUTEX_INIT_FUNCTION  rtems_gxx_mutex_init
  41
  42 /* avoid depedency on rtems specific headers */
  43 typedef void *__gthread_key_t;
  44 typedef int   __gthread_once_t;
  45 typedef void *__gthread_mutex_t;
  46
  47 /*
  48  * External functions provided by RTEMS. They are very similar to their POSIX
  49  * counterparts. A "Wrapper API" is being use to avoid dependency on any RTEMS
  50  * header files.
  51  */
  52
  53 /* generic per task variables */
  54 extern int rtems_gxx_once (__gthread_once_t *once, void (*func) (void));
  55 extern int rtems_gxx_key_create (__gthread_key_t *key, void (*dtor) (void *));
  56 extern int rtems_gxx_key_delete (__gthread_key_t key);
  57 extern void *rtems_gxx_getspecific (__gthread_key_t key);
  58 extern int rtems_gxx_setspecific (__gthread_key_t key, const void *ptr);
  59
  60 /* mutex support */
  61 extern void rtems_gxx_mutex_init (__gthread_mutex_t *mutex);
  62 extern int rtems_gxx_mutex_lock (__gthread_mutex_t *mutex);
  63 extern int rtems_gxx_mutex_trylock (__gthread_mutex_t *mutex);
  64 extern int rtems_gxx_mutex_unlock (__gthread_mutex_t *mutex);
  65
  66
  67 /* RTEMS threading is always active */
  68 static inline int
  69 __gthread_active_p (void)
  70 {
  71   return 1;
  72 }
  73
  74 /* Wrapper calls */
  75 static inline int
  76 __gthread_once (__gthread_once_t *once, void (*func) (void))
  77 {
  78    return rtems_gxx_once( once, func );
  79 }
  80
  81 static inline int
  82 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
  83 {
  84   return rtems_gxx_key_create( key, dtor );
  85 }
  86
  87 static inline int
  88 __gthread_key_delete (__gthread_key_t key)
  89 {
  90   return rtems_gxx_key_delete (key);
  91 }
  92
  93 static inline void *
  94 __gthread_getspecific (__gthread_key_t key)
  95 {
  96   return rtems_gxx_getspecific (key);
  97 }
  98
  99 static inline int
 100 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 101 {
 102   return rtems_gxx_setspecific (key, ptr);
 103 }
 104
 105 static inline int
 106 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 107 {
 108     return rtems_gxx_mutex_lock (mutex);
 109 }
 110
 111 static inline int
 112 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 113 {
 114     return rtems_gxx_mutex_trylock (mutex);
 115 }
 116
 117 static inline int
 118 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 119 {
 120     return rtems_gxx_mutex_unlock( mutex );
 121 }
 122
 123 #ifdef __cplusplus
 124 }
 125 #endif
 126
 127 #endif /* ! GCC_GTHR_RTEMS_H */