Imported gcc-4.4.3

[msp430-gcc.git] / gcc / gthr-vxworks.h

diff --git a/gcc/gthr-vxworks.h b/gcc/gthr-vxworks.h
index 1474853edb319378cc7d6e898c5c4f763635ba62..c2fb8e6729f019a4928f4cd4ce7bf7b2890a3db4 100644 (file)
--- a/gcc/gthr-vxworks.h
+++ b/gcc/gthr-vxworks.h
@@ -1,13 +1,13 @@
 /* Threads compatibility routines for libgcc2 and libobjc for VxWorks.  */
 /* Compile this one with gcc.  */
 /* Threads compatibility routines for libgcc2 and libobjc for VxWorks.  */
 /* Compile this one with gcc.  */

-/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1999, 2000, 2008, 2009 Free Software Foundation, Inc.

    Contributed by Mike Stump <mrs@wrs.com>.
 
 This file is part of GCC.
 
 GCC is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free
    Contributed by Mike Stump <mrs@wrs.com>.
 
 This file is part of GCC.
 
 GCC is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free

-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later

 version.
 
 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
 version.
 
 GCC is distributed in the hope that it will be useful, but WITHOUT ANY


@@ -15,296 +15,140 @@ WARRANTY; without even the implied warranty of MERCHANTABILITY or
 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
 
 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
 

-You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING.  If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.  */
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.

 
 

-/* As a special exception, if you link this library with other files,
-   some of which are compiled with GCC, to produce an executable,
-   this library does not by itself cause the resulting executable
-   to be covered by the GNU General Public License.
-   This exception does not however invalidate any other reasons why
-   the executable file might be covered by the GNU General Public License.  */
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */

 
 #ifndef GCC_GTHR_VXWORKS_H
 #define GCC_GTHR_VXWORKS_H
 
 #ifdef _LIBOBJC
 
 
 #ifndef GCC_GTHR_VXWORKS_H
 #define GCC_GTHR_VXWORKS_H
 
 #ifdef _LIBOBJC
 

-/* Thread local storage for a single thread */
-static void *thread_local_storage = NULL;
+/* libobjc requires the optional pthreads component.  */
+#include "gthr-posix.h"

 
 

-/* Backend initialization functions */
-
-/* Initialize the threads subsystem.  */
-int
-__gthread_objc_init_thread_system(void)
-{
-  /* No thread support available */
-  return -1;
-}
-
-/* Close the threads subsystem.  */
-int
-__gthread_objc_close_thread_system(void)
-{
-  /* No thread support available */
-  return -1;
-}
-
-/* Backend thread functions */
-
-/* Create a new thread of execution.  */
-objc_thread_t
-__gthread_objc_thread_detach(void (*func)(void *arg), void *arg)
-{
-  /* No thread support available */
-  return NULL;
-}
-
-/* Set the current thread's priority.  */
-int
-__gthread_objc_thread_set_priority(int priority)
-{
-  /* No thread support available */
-  return -1;
-}
-
-/* Return the current thread's priority.  */
-int
-__gthread_objc_thread_get_priority(void)
-{
-  return OBJC_THREAD_INTERACTIVE_PRIORITY;
-}
-
-/* Yield our process time to another thread.  */
-void
-__gthread_objc_thread_yield(void)
-{
-  return;
-}
-
-/* Terminate the current thread.  */
-int
-__gthread_objc_thread_exit(void)
-{
-  /* No thread support available */
-  /* Should we really exit the program */
-  /* exit(&__objc_thread_exit_status); */
-  return -1;
-}
-
-/* Returns an integer value which uniquely describes a thread.  */
-objc_thread_t
-__gthread_objc_thread_id(void)
-{
-  /* No thread support, use 1.  */
-  return (objc_thread_t)1;
-}
+#else
+#ifdef __cplusplus
+#define UNUSED(x)
+#else
+#define UNUSED(x) x __attribute__((unused))
+#endif

 
 

-/* Sets the thread's local storage pointer.  */
-int
-__gthread_objc_thread_set_data(void *value)
-{
-  thread_local_storage = value;
-  return 0;
-}
+#ifdef __cplusplus
+extern "C" {
+#endif

 
 

-/* Returns the thread's local storage pointer.  */
-void *
-__gthread_objc_thread_get_data(void)
-{
-  return thread_local_storage;
-}
+#define __GTHREADS 1
+#define __gthread_active_p() 1

 
 

-/* Backend mutex functions */
+/* Mutexes are easy, except that they need to be initialized at runtime.  */

 
 

-/* Allocate a mutex.  */
-int
-__gthread_objc_mutex_allocate(objc_mutex_t mutex)
-{
-  return 0;
-}
+#include <semLib.h>

 
 

-/* Deallocate a mutex.  */
-int
-__gthread_objc_mutex_deallocate(objc_mutex_t mutex)
-{
-  return 0;
-}
+typedef SEM_ID __gthread_mutex_t;
+/* All VxWorks mutexes are recursive.  */
+typedef SEM_ID __gthread_recursive_mutex_t;
+#define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function
+#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function

 
 

-/* Grab a lock on a mutex.  */
-int
-__gthread_objc_mutex_lock(objc_mutex_t mutex)
+static inline void
+__gthread_mutex_init_function (__gthread_mutex_t *mutex)

 {
 {

-  /* There can only be one thread, so we always get the lock */
-  return 0;
+  *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE);

 }
 
 }
 

-/* Try to grab a lock on a mutex.  */
-int
-__gthread_objc_mutex_trylock(objc_mutex_t mutex)
+static inline int
+__gthread_mutex_destroy (__gthread_mutex_t * UNUSED(mutex))

 {
 {

-  /* There can only be one thread, so we always get the lock */

   return 0;
 }
 
   return 0;
 }
 

-/* Unlock the mutex */
-int
-__gthread_objc_mutex_unlock(objc_mutex_t mutex)
+static inline int
+__gthread_mutex_lock (__gthread_mutex_t *mutex)

 {
 {

-  return 0;
+  return semTake (*mutex, WAIT_FOREVER);

 }
 
 }
 

-/* Backend condition mutex functions */
-
-/* Allocate a condition.  */
-int
-__gthread_objc_condition_allocate(objc_condition_t condition)
+static inline int
+__gthread_mutex_trylock (__gthread_mutex_t *mutex)

 {
 {

-  return 0;
+  return semTake (*mutex, NO_WAIT);

 }
 
 }
 

-/* Deallocate a condition.  */
-int
-__gthread_objc_condition_deallocate(objc_condition_t condition)
+static inline int
+__gthread_mutex_unlock (__gthread_mutex_t *mutex)

 {
 {

-  return 0;
+  return semGive (*mutex);

 }
 
 }
 

-/* Wait on the condition */
-int
-__gthread_objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
+static inline void
+__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)

 {
 {

-  return 0;
+  __gthread_mutex_init_function (mutex);

 }
 
 }
 

-/* Wake up all threads waiting on this condition.  */
-int
-__gthread_objc_condition_broadcast(objc_condition_t condition)
+static inline int
+__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)

 {
 {

-  return 0;
+  return __gthread_mutex_lock (mutex);

 }
 
 }
 

-/* Wake up one thread waiting on this condition.  */
-int
-__gthread_objc_condition_signal(objc_condition_t condition)
+static inline int
+__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)

 {
 {

-  return 0;
+  return __gthread_mutex_trylock (mutex);

 }
 
 }
 

-#else /* _LIBOBJC */
-
-/* POSIX threads specific definitions.
-   Easy, since the interface is just one-to-one mapping.  */
-
-#define __GTHREADS 1
-
-#include <vxWorks.h>
-#include <semLib.h>
-/* typedef void *SEM_ID; */
-
-typedef int __gthread_key_t;
-typedef char __gthread_once_t;
-typedef SEM_ID __gthread_mutex_t;
-
-#define __GTHREAD_MUTEX_INIT 0
-#define __GTHREAD_ONCE_INIT 0
-
-#ifndef REG_SAVED_REG

 static inline int
 static inline int

-__gthread_once (__gthread_once_t *once, void (*func) (void))
+__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)

 {
 {

-  (*func)();
-  return 0;
+  return __gthread_mutex_unlock (mutex);

 }
 
 }
 

-extern __gthread_key_t eh_context_key;
-
-/* This is not the right way to do it, but the semantic of pthreads
-   don't map well enough onto VxWorks.  */
+/* pthread_once is complicated enough that it's implemented
+   out-of-line.  See config/vxlib.c.  */

 
 

-static void
-__ehdtor (void *pTcb)
+typedef struct

 {
 {

-  int tid = (int) pTcb;
-  void *p = (void*)taskVarGet(tid, &eh_context_key);
-  if (p != (void*)-1)
-    {
-      if (p)
-       free (p);
-      taskVarSet(tid, &eh_context_key, 0);
-    }
+#ifndef __RTP__
+  volatile unsigned char busy;
+#endif
+  volatile unsigned char done;

 }
 }

+__gthread_once_t;

 
 

-/* This only works for the code in libgcc2.c.  */
-
-static inline int
-__gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
-{
-  *key = 0;
+#ifndef __RTP__
+# define __GTHREAD_ONCE_INIT { 0, 0 }
+#else
+# define __GTHREAD_ONCE_INIT { 0 }
+#endif

 
 

-  /* Do this first so that the task variables are visible during the
-     running of the delete hook.  */
+extern int __gthread_once (__gthread_once_t *__once, void (*__func)(void));

 
 

-  taskVarInit();
+/* Thread-specific data requires a great deal of effort, since VxWorks
+   is not really set up for it.  See config/vxlib.c for the gory
+   details.  All the TSD routines are sufficiently complex that they
+   need to be implemented out of line.  */

 
 

-  /* We don't have a way to track dtor here, so instead, we
-     register a generic routine that can cleanup any task.  */
+typedef unsigned int __gthread_key_t;

 
 

-  taskDeleteHookAdd (__ehdtor);
+extern int __gthread_key_create (__gthread_key_t *__keyp, void (*__dtor)(void *));
+extern int __gthread_key_delete (__gthread_key_t __key);

 
 

-  return 0;
-}
+extern void *__gthread_getspecific (__gthread_key_t __key);
+extern int __gthread_setspecific (__gthread_key_t __key, void *__ptr);

 
 

-#define __gthread_setspecific(key, ptr) \
-  (key = (int) ptr, 0)
+#undef UNUSED

 
 

-static inline int
-__gthread_key_dtor (__gthread_key_t key, void *ptr)
-{
-  /* Just reset the key value to zero.  */
-  if (ptr)
-    return __gthread_setspecific (key, 0);
-  else
-    return 0;
+#ifdef __cplusplus

 }
 }

-
-#define __gthread_key_delete(key) \
-  taskVarDelete (taskIdSelf (), &key)
-
-#define __gthread_getspecific(key)                     \
-     ((key == 0)                                       \
-      ? ((taskVarAdd (taskIdSelf (), &key) != OK)      \
-        ? (__terminate (), (void*)0)                   \
-        : (void*)0)                                    \
-      : (void*)key)

 #endif
 
 #endif
 

-static inline int
-__gthread_mutex_lock (__gthread_mutex_t *mutex)
-{
-  if (*mutex == 0)
-    *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE);
-  return semTake (*mutex, WAIT_FOREVER);
-}
-
-static inline int
-__gthread_mutex_trylock (__gthread_mutex_t *mutex)
-{
-  if (*mutex == 0)
-    *mutex = semMCreate (SEM_Q_PRIORITY | SEM_INVERSION_SAFE | SEM_DELETE_SAFE);
-  return semTake (*mutex, NO_WAIT);
-}
-
-static inline int
-__gthread_mutex_unlock (__gthread_mutex_t *mutex)
-{
-  /* We could return the */
-  return semGive (*mutex);
-}
-
-#endif /* _LIBOBJC */
+#endif /* not _LIBOBJC */

 
 

-#endif /* ! GCC_GTHR_VXWORKS_H */
+#endif /* gthr-vxworks.h */