[rtems commit] score: Changes due to Newlib __DYNAMIC_REENT__

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    9c9b62d8ddc9d61abad5106b819bb3ca9912d572
Changeset: http://git.rtems.org/rtems/commit/?id=9c9b62d8ddc9d61abad5106b819bb3ca9912d572

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Wed Jul 17 11:44:55 2013 +0200

score: Changes due to Newlib __DYNAMIC_REENT__

Delete _Thread_libc_reent and add __getreent() instead according to
__DYNAMIC_REENT__ define.

For SMP configurations __DYNAMIC_REENT__ must be defined.

A Newlib including the following patch is required:

2013-07-09  Sebastian Huber  <sebastian.huber at embedded-brains.de>

	* libc/include/sys/config.h (__DYNAMIC_REENT__): Define for RTEMS.

---

 cpukit/libcsupport/src/newlibc_reent.c     |    2 ++
 cpukit/sapi/include/confdefs.h             |   16 ++++++++++++++--
 cpukit/score/include/rtems/score/thread.h  |    3 +++
 cpukit/score/inline/rtems/score/thread.inl |    2 ++
 cpukit/score/src/threaddispatch.c          |    2 ++
 5 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/cpukit/libcsupport/src/newlibc_reent.c b/cpukit/libcsupport/src/newlibc_reent.c
index 972248f..62b5d6b 100644
--- a/cpukit/libcsupport/src/newlibc_reent.c
+++ b/cpukit/libcsupport/src/newlibc_reent.c
@@ -36,12 +36,14 @@ bool newlib_create_hook(
   struct _reent *ptr;
   bool ok;
 
+#if !defined(__DYNAMIC_REENT__)
   if (_Thread_libc_reent == 0)
   {
     _REENT = _GLOBAL_REENT;
 
     _Thread_Set_libc_reent (&_REENT);
   }
+#endif
 
   /* It is OK to allocate from the workspace because these
    * hooks run with thread dispatching disabled.
diff --git a/cpukit/sapi/include/confdefs.h b/cpukit/sapi/include/confdefs.h
index bf9f5e8..1585548 100644
--- a/cpukit/sapi/include/confdefs.h
+++ b/cpukit/sapi/include/confdefs.h
@@ -61,6 +61,10 @@
   #include <bsp.h>
 #endif
 
+#ifdef RTEMS_NEWLIB
+  #include <sys/reent.h>
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -1650,6 +1654,16 @@ const rtems_libio_helper rtems_fs_init_helper =
   #define CONFIGURE_NUMBER_OF_INITIAL_EXTENSIONS 0
 #endif
 
+#if defined(RTEMS_NEWLIB) && defined(__DYNAMIC_REENT__)
+  struct _reent *__getreent(void)
+  {
+    #ifdef CONFIGURE_DISABLE_NEWLIB_REENTRANCY
+      return _GLOBAL_REENT;
+    #else
+      return _Thread_Get_executing()->libc_reent;
+    #endif
+  }
+#endif
 
 #endif
 
@@ -1939,8 +1953,6 @@ const rtems_libio_helper rtems_fs_init_helper =
  */
 
 #if (defined(RTEMS_NEWLIB) && !defined(CONFIGURE_DISABLE_NEWLIB_REENTRANCY))
-  #include <reent.h>
-
   #define CONFIGURE_MEMORY_PER_TASK_FOR_NEWLIB \
     _Configure_From_workspace(sizeof(struct _reent))
 #else
diff --git a/cpukit/score/include/rtems/score/thread.h b/cpukit/score/include/rtems/score/thread.h
index 5e8bc95..9ce8ad1 100644
--- a/cpukit/score/include/rtems/score/thread.h
+++ b/cpukit/score/include/rtems/score/thread.h
@@ -499,6 +499,7 @@ SCORE_EXTERN uint32_t   _Thread_Ticks_per_timeslice;
 SCORE_EXTERN Thread_Control *_Thread_Allocated_fp;
 #endif
 
+#if !defined(__DYNAMIC_REENT__)
 /**
  * The C library re-enter-rant global pointer. Some C library implementations
  * such as newlib have a single global pointer that changed during a context
@@ -506,6 +507,8 @@ SCORE_EXTERN Thread_Control *_Thread_Allocated_fp;
  * holds a pointer to the task specific data.
  */
 SCORE_EXTERN struct _reent **_Thread_libc_reent;
+#endif
+
 /**
  *  @brief Initialize thread handler.
  *
diff --git a/cpukit/score/inline/rtems/score/thread.inl b/cpukit/score/inline/rtems/score/thread.inl
index 4576dea..88438d6 100644
--- a/cpukit/score/inline/rtems/score/thread.inl
+++ b/cpukit/score/inline/rtems/score/thread.inl
@@ -248,6 +248,7 @@ RTEMS_INLINE_ROUTINE void _Thread_Dispatch_if_necessary(
   }
 }
 
+#if !defined(__DYNAMIC_REENT__)
 /**
  * This routine returns the C library re-enterant pointer.
  */
@@ -267,6 +268,7 @@ RTEMS_INLINE_ROUTINE void _Thread_Set_libc_reent (
 {
   _Thread_libc_reent = libc_reent;
 }
+#endif
 
 /** @}*/
 
diff --git a/cpukit/score/src/threaddispatch.c b/cpukit/score/src/threaddispatch.c
index 4cd449d..adce3a1 100644
--- a/cpukit/score/src/threaddispatch.c
+++ b/cpukit/score/src/threaddispatch.c
@@ -143,6 +143,7 @@ void _Thread_Dispatch( void )
       }
     #endif
 
+#if !defined(__DYNAMIC_REENT__)
     /*
      * Switch libc's task specific data.
      */
@@ -150,6 +151,7 @@ void _Thread_Dispatch( void )
       executing->libc_reent = *_Thread_libc_reent;
       *_Thread_libc_reent = heir->libc_reent;
     }
+#endif
 
     _User_extensions_Thread_switch( executing, heir );