gcc/gthr-rtems.h

   1 /* RTEMS threads compatibility 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, 2003, 2005
   5    Free Software Foundation, Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 2, or (at your option) any later
  12 version.
  13
  14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING.  If not, write to the Free
  21 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  22 02110-1301, USA.  */
  23
  24 /* As a special exception, if you link this library with other files,
  25    some of which are compiled with GCC, to produce an executable,
  26    this library does not by itself cause the resulting executable
  27    to be covered by the GNU General Public License.
  28    This exception does not however invalidate any other reasons why
  29    the executable file might be covered by the GNU General Public License.  */
  30
  31 #ifndef GCC_GTHR_RTEMS_H
  32 #define GCC_GTHR_RTEMS_H
  33
  34 #ifdef __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 #define __GTHREADS 1
  39
  40 #define __GTHREAD_ONCE_INIT  0
  41 #define __GTHREAD_MUTEX_INIT 0
  42 #define __GTHREAD_MUTEX_INIT_FUNCTION  rtems_gxx_mutex_init
  43 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION  rtems_gxx_recursive_mutex_init
  44
  45 /* Avoid dependency on rtems specific headers.  */
  46 typedef void *__gthread_key_t;
  47 typedef int   __gthread_once_t;
  48 typedef void *__gthread_mutex_t;
  49 typedef void *__gthread_recursive_mutex_t;
  50
  51 /*
  52  * External functions provided by RTEMS. They are very similar to their POSIX
  53  * counterparts. A "Wrapper API" is being use to avoid dependency on any RTEMS
  54  * header files.
  55  */
  56
  57 /* generic per task variables */
  58 extern int rtems_gxx_once (__gthread_once_t *once, void (*func) (void));
  59 extern int rtems_gxx_key_create (__gthread_key_t *key, void (*dtor) (void *));
  60 extern int rtems_gxx_key_delete (__gthread_key_t key);
  61 extern void *rtems_gxx_getspecific (__gthread_key_t key);
  62 extern int rtems_gxx_setspecific (__gthread_key_t key, const void *ptr);
  63
  64 /* mutex support */
  65 extern void rtems_gxx_mutex_init (__gthread_mutex_t *mutex);
  66 extern int rtems_gxx_mutex_lock (__gthread_mutex_t *mutex);
  67 extern int rtems_gxx_mutex_trylock (__gthread_mutex_t *mutex);
  68 extern int rtems_gxx_mutex_unlock (__gthread_mutex_t *mutex);
  69
  70 /* recursive mutex support */
  71 extern void rtems_gxx_recursive_mutex_init (__gthread_recursive_mutex_t *mutex);
  72 extern int rtems_gxx_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex);
  73 extern int rtems_gxx_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex);
  74 extern int rtems_gxx_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex);
  75
  76 /* RTEMS threading is always active */
  77 static inline int
  78 __gthread_active_p (void)
  79 {
  80   return 1;
  81 }
  82
  83 /* Wrapper calls */
  84 static inline int
  85 __gthread_once (__gthread_once_t *once, void (*func) (void))
  86 {
  87    return rtems_gxx_once( once, func );
  88 }
  89
  90 static inline int
  91 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
  92 {
  93   return rtems_gxx_key_create( key, dtor );
  94 }
  95
  96 static inline int
  97 __gthread_key_delete (__gthread_key_t key)
  98 {
  99   return rtems_gxx_key_delete (key);
 100 }
 101
 102 static inline void *
 103 __gthread_getspecific (__gthread_key_t key)
 104 {
 105   return rtems_gxx_getspecific (key);
 106 }
 107
 108 static inline int
 109 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 110 {
 111   return rtems_gxx_setspecific (key, ptr);
 112 }
 113
 114 static inline int
 115 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 116 {
 117     return rtems_gxx_mutex_lock (mutex);
 118 }
 119
 120 static inline int
 121 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 122 {
 123     return rtems_gxx_mutex_trylock (mutex);
 124 }
 125
 126 static inline int
 127 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 128 {
 129     return rtems_gxx_mutex_unlock( mutex );
 130 }
 131
 132 static inline int
 133 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
 134 {
 135     return rtems_gxx_recursive_mutex_lock (mutex);
 136 }
 137
 138 static inline int
 139 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
 140 {
 141     return rtems_gxx_recursive_mutex_trylock (mutex);
 142 }
 143
 144 static inline int
 145 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
 146 {
 147     return rtems_gxx_recursive_mutex_unlock( mutex );
 148 }
 149
 150 #ifdef __cplusplus
 151 }
 152 #endif
 153
 154 #endif /* ! GCC_GTHR_RTEMS_H */