1 files changed, 84 insertions, 0 deletions
diff --git a/cpukit/score/src/threadstackallocate.c b/cpukit/score/src/threadstackallocate.c
new file mode 100644
index 0000000000..d8e21ea1f6
--- /dev/null
+++ b/cpukit/score/src/threadstackallocate.c
@@ -0,0 +1,84 @@
+/*
+ *  Thread Handler - Stack Allocate Helper
+ *
+ *  COPYRIGHT (c) 1989-2010.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/system.h>
+#include <rtems/score/apiext.h>
+#include <rtems/score/context.h>
+#include <rtems/score/interr.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/object.h>
+#include <rtems/score/priority.h>
+#include <rtems/score/states.h>
+#include <rtems/score/sysstate.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/threadq.h>
+#include <rtems/score/userext.h>
+#include <rtems/score/wkspace.h>
+#include <rtems/config.h>
+
+/*PAGE
+ *
+ *  _Thread_Stack_Allocate
+ *
+ *  Allocate the requested stack space for the thread.
+ *  return the actual size allocated after any adjustment
+ *  or return zero if the allocation failed.
+ *  Set the Start.stack field to the address of the stack
+ */
+
+size_t _Thread_Stack_Allocate(
+  Thread_Control *the_thread,
+  size_t          stack_size
+)
+{
+  void *stack_addr = 0;
+  size_t the_stack_size;
+
+  the_stack_size = _Stack_Ensure_minimum( stack_size );
+
+  /*
+   * Call ONLY the CPU table stack allocate hook, _or_ the
+   * the RTEMS workspace allocate.  This is so the stack free
+   * routine can call the correct deallocation routine.
+   */
+
+  if ( Configuration.stack_allocate_hook ) {
+    stack_addr = (*Configuration.stack_allocate_hook)( the_stack_size );
+  } else {
+
+    /*
+     *  First pad the requested size so we allocate enough memory
+     *  so the context initialization can align it properly.  The address
+     *  returned the workspace allocate must be directly stored in the
+     *  stack control block because it is later used in the free sequence.
+     *
+     *  Thus it is the responsibility of the CPU dependent code to
+     *  get and keep the stack adjust factor, the stack alignment, and
+     *  the context initialization sequence in sync.
+     */
+
+    the_stack_size = _Stack_Adjust_size( the_stack_size );
+    stack_addr = _Workspace_Allocate( the_stack_size );
+  }
+
+  if ( !stack_addr )
+    the_stack_size = 0;
+
+  the_thread->Start.stack = stack_addr;
+
+  return the_stack_size;
+}