From 05df0a846f436295a490cc9ac19e5a4061c3a575 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Mon, 17 May 1999 20:41:13 +0000
Subject: Thread Handler split into multiple files.  Eventually, as RTEMS is
 split into one function per file, this will decrease the size of executables.

---
 cpukit/score/src/threadstackallocate.c | 82 ++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 cpukit/score/src/threadstackallocate.c

(limited to 'cpukit/score/src/threadstackallocate.c')

diff --git a/cpukit/score/src/threadstackallocate.c b/cpukit/score/src/threadstackallocate.c
new file mode 100644
index 0000000000..b37c65749f
--- /dev/null
+++ b/cpukit/score/src/threadstackallocate.c
@@ -0,0 +1,82 @@
+/*
+ *  Thread Handler
+ *
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#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>
+
+/*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
+ */
+
+unsigned32 _Thread_Stack_Allocate(
+  Thread_Control *the_thread,
+  unsigned32 stack_size
+)
+{
+  void *stack_addr = 0;
+ 
+  if ( !_Stack_Is_enough( stack_size ) )
+    stack_size = STACK_MINIMUM_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 ( _CPU_Table.stack_allocate_hook )
+  {
+    stack_addr = (*_CPU_Table.stack_allocate_hook)( 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.
+     */
+
+    stack_size = _Stack_Adjust_size( stack_size );
+    stack_addr = _Workspace_Allocate( stack_size );
+  }
+ 
+  if ( !stack_addr )
+      stack_size = 0;
+ 
+  the_thread->Start.stack = stack_addr;
+ 
+  return stack_size;
+}
-- 
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