libgcc/config/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) 1997-2015 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 3, 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 Under Section 7 of GPL version 3, you are granted additional
  19 permissions described in the GCC Runtime Library Exception, version
  20 3.1, as published by the Free Software Foundation.
  21
  22 You should have received a copy of the GNU General Public License and
  23 a copy of the GCC Runtime Library Exception along with this program;
  24 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  25 <http://www.gnu.org/licenses/>.  */
  26
  27 #ifndef GCC_GTHR_RTEMS_H
  28 #define GCC_GTHR_RTEMS_H
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 #define __GTHREADS 1
  35
  36 #define __GTHREAD_ONCE_INIT  0
  37 #define __GTHREAD_MUTEX_INIT_FUNCTION  rtems_gxx_mutex_init
  38 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION  rtems_gxx_recursive_mutex_init
  39
  40 /* Avoid dependency on rtems specific headers.  */
  41 typedef void *__gthread_key_t;
  42 typedef int   __gthread_once_t;
  43 typedef void *__gthread_mutex_t;
  44 typedef void *__gthread_recursive_mutex_t;
  45
  46 /*
  47  * External functions provided by RTEMS. They are very similar to their POSIX
  48  * counterparts. A "Wrapper API" is being use to avoid dependency on any RTEMS
  49  * header files.
  50  */
  51
  52 /* generic per task variables */
  53 extern int rtems_gxx_once (__gthread_once_t *__once, void (*__func) (void));
  54 extern int rtems_gxx_key_create (__gthread_key_t *__key, void (*__dtor) (void *));
  55 extern int rtems_gxx_key_delete (__gthread_key_t __key);
  56 extern void *rtems_gxx_getspecific (__gthread_key_t __key);
  57 extern int rtems_gxx_setspecific (__gthread_key_t __key, const void *__ptr);
  58
  59 /* mutex support */
  60 extern void rtems_gxx_mutex_init (__gthread_mutex_t *__mutex);
  61 extern int rtems_gxx_mutex_destroy (__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 /* recursive mutex support */
  67 extern void rtems_gxx_recursive_mutex_init (__gthread_recursive_mutex_t *__mutex);
  68 extern int rtems_gxx_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex);
  69 extern int rtems_gxx_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex);
  70 extern int rtems_gxx_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex);
  71
  72 /* RTEMS threading is always active */
  73 static inline int
  74 __gthread_active_p (void)
  75 {
  76   return 1;
  77 }
  78
  79 /* Wrapper calls */
  80 static inline int
  81 __gthread_once (__gthread_once_t *__once, void (*__func) (void))
  82 {
  83    return rtems_gxx_once( __once, __func );
  84 }
  85
  86 static inline int
  87 __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
  88 {
  89   return rtems_gxx_key_create( __key, __dtor );
  90 }
  91
  92 static inline int
  93 __gthread_key_delete (__gthread_key_t __key)
  94 {
  95   return rtems_gxx_key_delete (__key);
  96 }
  97
  98 static inline void *
  99 __gthread_getspecific (__gthread_key_t __key)
 100 {
 101   return rtems_gxx_getspecific (__key);
 102 }
 103
 104 static inline int
 105 __gthread_setspecific (__gthread_key_t __key, const void *__ptr)
 106 {
 107   return rtems_gxx_setspecific (__key, __ptr);
 108 }
 109
 110 static inline int
 111 __gthread_mutex_destroy (__gthread_mutex_t *__mutex)
 112 {
 113   return rtems_gxx_mutex_destroy (__mutex);
 114 }
 115
 116 static inline int
 117 __gthread_mutex_lock (__gthread_mutex_t *__mutex)
 118 {
 119     return rtems_gxx_mutex_lock (__mutex);
 120 }
 121
 122 static inline int
 123 __gthread_mutex_trylock (__gthread_mutex_t *__mutex)
 124 {
 125     return rtems_gxx_mutex_trylock (__mutex);
 126 }
 127
 128 static inline int
 129 __gthread_mutex_unlock (__gthread_mutex_t *__mutex)
 130 {
 131     return rtems_gxx_mutex_unlock( __mutex );
 132 }
 133
 134 static inline int
 135 __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
 136 {
 137     return rtems_gxx_recursive_mutex_lock (__mutex);
 138 }
 139
 140 static inline int
 141 __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
 142 {
 143     return rtems_gxx_recursive_mutex_trylock (__mutex);
 144 }
 145
 146 static inline int
 147 __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
 148 {
 149     return rtems_gxx_recursive_mutex_unlock( __mutex );
 150 }
 151
 152 static inline int
 153 __gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex)
 154 {
 155   /* This requires that recursive and non-recursive mutexes have the same
 156      representation.  */
 157     return rtems_gxx_mutex_destroy (__mutex );
 158 }
 159
 160 #ifdef __cplusplus
 161 }
 162 #endif
 163
 164 #endif /* ! GCC_GTHR_RTEMS_H */