[PATCH] [RTEMS] Update RTEMS thread model
Sebastian Huber
sebastian.huber at embedded-brains.de
Tue Sep 1 11:49:23 UTC 2015
For synchronization objects use the self-contained objects available via
Newlib <sys/lock.h>.
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;a=commit;h=ecaef05f6601f1e8acb78fb65b411a258f39988a
Enable the C++11 threads using <pthread.h>. So, the threads are only
supported in case the POSIX API is enabled in RTEMS. In the long run
support for thread join and detach should be added to the API
independent RTEMS services.
libgcc/ChangeLog
2015-09-01 Sebastian Huber <sebastian.huber at embedded-brains.de>
* config/gthr-rtems.h (__GTHREADS_CXX0X): New.
(__GTHREAD_HAS_COND): Likewise.
(__gthread_t): Likewise.
(__gthread_cond_t): Likewise.
(__gthread_time_t): Likewise.
(__GTHREAD_MUTEX_INIT): Likewise.
(__GTHREAD_RECURSIVE_MUTEX_INIT): Likewise.
(__GTHREAD_COND_INIT): Likewise.
(__GTHREAD_COND_INIT_FUNCTION): Likewise.
(__GTHREAD_TIME_INIT): Likewise.
(__gthread_create): Likewise.
(__gthread_join): Likewise.
(__gthread_detach): Likewise.
(__gthread_equal): Likewise.
(__gthread_self): Likewise.
(__gthread_yield): Likewise.
(__gthread_cond_broadcast): Likewise.
(__gthread_cond_signal): Likewise.
(__gthread_cond_wait): Likewise.
(__gthread_cond_timedwait): Likewise.
(__gthread_cond_wait_recursive): Likewise.
(__gthread_cond_destroy): Likewise.
(rtems_gxx_once): Delete.
(rtems_gxx_key_create): Likewise.
(rtems_gxx_key_delete): Likewise.
(rtems_gxx_getspecific): Likewise.
(rtems_gxx_setspecific): Likewise.
(rtems_gxx_mutex_init): Likewise.
(rtems_gxx_mutex_destroy): Likewise.
(rtems_gxx_mutex_lock): Likewise.
(rtems_gxx_mutex_trylock): Likewise.
(rtems_gxx_mutex_unlock): Likewise.
(rtems_gxx_recursive_mutex_init): Likewise.
(rtems_gxx_recursive_mutex_lock): Likewise.
(rtems_gxx_recursive_mutex_trylock): Likewise.
(rtems_gxx_recursive_mutex_unlock): Likewise.
(__GTHREAD_ONCE_INIT): Use <pthread.h> initializer.
(__GTHREAD_MUTEX_INIT_FUNCTION): Use <pthread.h> function.
(__GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION): Likewise.
(__gthread_once): Likewise.
(__gthread_key_create): Likewise.
(__gthread_key_delete): Likewise.
(__gthread_getspecific): Likewise.
(__gthread_setspecific): Likewise.
(__gthread_key_t): Use <pthread.h> type.
(__gthread_once_t): Likewise
(__gthread_mutex_t): Use <sys/lock.h> type.
(__gthread_recursive_mutex_t): Likewise
(__gthread_mutex_lock): Use <sys/lock.h> function.
(__gthread_mutex_trylock): Likewise.
(__gthread_mutex_timedlock): Likewise.
(__gthread_mutex_unlock): Likewise.
(__gthread_mutex_destroy): Likewise.
(__gthread_recursive_mutex_lock): Likewise.
(__gthread_recursive_mutex_trylock): Likewise.
(__gthread_recursive_mutex_timedlock): Likewise.
(__gthread_recursive_mutex_unlock): Likewise.
(__gthread_recursive_mutex_destroy): Likewise.
---
libgcc/config/gthr-rtems.h | 195 ++++++++++++++++++++++++++++++++-------------
1 file changed, 139 insertions(+), 56 deletions(-)
diff --git a/libgcc/config/gthr-rtems.h b/libgcc/config/gthr-rtems.h
index 23038c6..1aff329 100644
--- a/libgcc/config/gthr-rtems.h
+++ b/libgcc/config/gthr-rtems.h
@@ -27,134 +27,217 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
#ifndef GCC_GTHR_RTEMS_H
#define GCC_GTHR_RTEMS_H
+#include <sys/lock.h>
+#include <pthread.h>
+#include <sched.h>
+
#ifdef __cplusplus
extern "C" {
#endif
#define __GTHREADS 1
+#define __GTHREADS_CXX0X 1
+#define __GTHREAD_HAS_COND 1
+
+typedef pthread_t __gthread_t;
+typedef pthread_key_t __gthread_key_t;
+typedef pthread_once_t __gthread_once_t;
+typedef struct _Mutex_Control __gthread_mutex_t;
+typedef struct _Mutex_recursive_Control __gthread_recursive_mutex_t;
+typedef struct _Condition_Control __gthread_cond_t;
+typedef struct timespec __gthread_time_t;
+
+#define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
+#define __GTHREAD_MUTEX_INIT _MUTEX_INITIALIZER
+#define __GTHREAD_MUTEX_INIT_FUNCTION _Mutex_Initialize
+#define __GTHREAD_RECURSIVE_MUTEX_INIT _MUTEX_RECURSIVE_INITIALIZER
+#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION _Mutex_recursive_Initialize
+#define __GTHREAD_COND_INIT _CONDITION_INITIALIZER
+#define __GTHREAD_COND_INIT_FUNCTION _Condition_Initialize
+#define __GTHREAD_TIME_INIT {0, 0}
-#define __GTHREAD_ONCE_INIT 0
-#define __GTHREAD_MUTEX_INIT_FUNCTION rtems_gxx_mutex_init
-#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION rtems_gxx_recursive_mutex_init
-
-/* Avoid dependency on rtems specific headers. */
-typedef void *__gthread_key_t;
-typedef int __gthread_once_t;
-typedef void *__gthread_mutex_t;
-typedef void *__gthread_recursive_mutex_t;
-
-/*
- * External functions provided by RTEMS. They are very similar to their POSIX
- * counterparts. A "Wrapper API" is being use to avoid dependency on any RTEMS
- * header files.
- */
-
-/* generic per task variables */
-extern int rtems_gxx_once (__gthread_once_t *__once, void (*__func) (void));
-extern int rtems_gxx_key_create (__gthread_key_t *__key, void (*__dtor) (void *));
-extern int rtems_gxx_key_delete (__gthread_key_t __key);
-extern void *rtems_gxx_getspecific (__gthread_key_t __key);
-extern int rtems_gxx_setspecific (__gthread_key_t __key, const void *__ptr);
-
-/* mutex support */
-extern void rtems_gxx_mutex_init (__gthread_mutex_t *__mutex);
-extern int rtems_gxx_mutex_destroy (__gthread_mutex_t *__mutex);
-extern int rtems_gxx_mutex_lock (__gthread_mutex_t *__mutex);
-extern int rtems_gxx_mutex_trylock (__gthread_mutex_t *__mutex);
-extern int rtems_gxx_mutex_unlock (__gthread_mutex_t *__mutex);
-
-/* recursive mutex support */
-extern void rtems_gxx_recursive_mutex_init (__gthread_recursive_mutex_t *__mutex);
-extern int rtems_gxx_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex);
-extern int rtems_gxx_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex);
-extern int rtems_gxx_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex);
-
-/* RTEMS threading is always active */
static inline int
__gthread_active_p (void)
{
return 1;
}
-/* Wrapper calls */
+static inline int
+__gthread_create (__gthread_t *__threadid, void *(*__func) (void *),
+ void *__args)
+{
+ return pthread_create (__threadid, NULL, __func, __args);
+}
+
+static inline int
+__gthread_join (__gthread_t __threadid, void **__value_ptr)
+{
+ return pthread_join (__threadid, __value_ptr);
+}
+
+static inline int
+__gthread_detach (__gthread_t __threadid)
+{
+ return pthread_detach (__threadid);
+}
+
+static inline int
+__gthread_equal (__gthread_t __t1, __gthread_t __t2)
+{
+ return pthread_equal (__t1, __t2);
+}
+
+static inline __gthread_t
+__gthread_self (void)
+{
+ return pthread_self ();
+}
+
+static inline int
+__gthread_yield (void)
+{
+ return sched_yield ();
+}
+
static inline int
__gthread_once (__gthread_once_t *__once, void (*__func) (void))
{
- return rtems_gxx_once( __once, __func );
+ return pthread_once (__once, __func);
}
static inline int
__gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
{
- return rtems_gxx_key_create( __key, __dtor );
+ return pthread_key_create (__key, __dtor);
}
static inline int
__gthread_key_delete (__gthread_key_t __key)
{
- return rtems_gxx_key_delete (__key);
+ return pthread_key_delete (__key);
}
static inline void *
__gthread_getspecific (__gthread_key_t __key)
{
- return rtems_gxx_getspecific (__key);
+ return pthread_getspecific (__key);
}
static inline int
__gthread_setspecific (__gthread_key_t __key, const void *__ptr)
{
- return rtems_gxx_setspecific (__key, __ptr);
+ return pthread_setspecific (__key, __ptr);
}
static inline int
-__gthread_mutex_destroy (__gthread_mutex_t *__mutex)
+__gthread_mutex_lock (__gthread_mutex_t *__mutex)
{
- return rtems_gxx_mutex_destroy (__mutex);
+ _Mutex_Acquire (__mutex);
+ return 0;
}
static inline int
-__gthread_mutex_lock (__gthread_mutex_t *__mutex)
+__gthread_mutex_trylock (__gthread_mutex_t *__mutex)
{
- return rtems_gxx_mutex_lock (__mutex);
+ return _Mutex_Try_acquire (__mutex);
}
static inline int
-__gthread_mutex_trylock (__gthread_mutex_t *__mutex)
+__gthread_mutex_timedlock (__gthread_mutex_t *__mutex,
+ const __gthread_time_t *__abs_timeout)
{
- return rtems_gxx_mutex_trylock (__mutex);
+ return _Mutex_Acquire_timed (__mutex, __abs_timeout);
}
static inline int
__gthread_mutex_unlock (__gthread_mutex_t *__mutex)
{
- return rtems_gxx_mutex_unlock( __mutex );
+ _Mutex_Release (__mutex);
+ return 0;
+}
+
+static inline int
+__gthread_mutex_destroy (__gthread_mutex_t *__mutex)
+{
+ _Mutex_Destroy (__mutex);
+ return 0;
}
static inline int
__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
{
- return rtems_gxx_recursive_mutex_lock (__mutex);
+ _Mutex_recursive_Acquire (__mutex);
+ return 0;
}
static inline int
__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
{
- return rtems_gxx_recursive_mutex_trylock (__mutex);
+ return _Mutex_recursive_Try_acquire (__mutex);
+}
+
+static inline int
+__gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *__mutex,
+ const __gthread_time_t *__abs_timeout)
+{
+ return _Mutex_recursive_Acquire_timed (__mutex, __abs_timeout);
}
static inline int
__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
{
- return rtems_gxx_recursive_mutex_unlock( __mutex );
+ _Mutex_recursive_Release (__mutex);
+ return 0;
}
static inline int
__gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex)
{
- /* This requires that recursive and non-recursive mutexes have the same
- representation. */
- return rtems_gxx_mutex_destroy (__mutex );
+ _Mutex_recursive_Destroy (__mutex);
+ return 0;
+}
+
+static inline int
+__gthread_cond_broadcast (__gthread_cond_t *__cond)
+{
+ _Condition_Broadcast (__cond);
+ return 0;
+}
+
+static inline int
+__gthread_cond_signal (__gthread_cond_t *__cond)
+{
+ _Condition_Signal (__cond);
+ return 0;
+}
+
+static inline int
+__gthread_cond_wait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex)
+{
+ _Condition_Wait (__cond, __mutex);
+ return 0;
+}
+
+static inline int
+__gthread_cond_timedwait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex,
+ const __gthread_time_t *__abs_timeout)
+{
+ return _Condition_Wait_timed (__cond, __mutex, __abs_timeout);
+}
+
+static inline int
+__gthread_cond_wait_recursive (__gthread_cond_t *__cond,
+ __gthread_recursive_mutex_t *__mutex)
+{
+ _Condition_Wait_recursive (__cond, __mutex);
+ return 0;
+}
+
+static inline int
+__gthread_cond_destroy (__gthread_cond_t *__cond)
+{
+ _Condition_Destroy (__cond);
+ return 0;
}
#ifdef __cplusplus
--
1.8.4.5
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