source: rtems/cpukit/score/src/threadstackallocate.c @ 3127180

4.104.114.84.95
Last change on this file since 3127180 was 3127180, checked in by Ralf Corsepius <ralf.corsepius@…>, on 03/29/04 at 12:51:43

2004-04-29 Ralf Corsepius <ralf_corsepius@…>

  • score/src/Unlimited.txt, score/src/chain.c, score/src/coremsg.c, score/src/coremsgbroadcast.c, score/src/coremsgclose.c, score/src/coremsgflush.c, score/src/coremsgflushsupp.c, score/src/coremsgseize.c, score/src/coremsgsubmit.c, score/src/coremutex.c, score/src/coremutexflush.c, score/src/coresem.c, score/src/coresemflush.c, score/src/coretod.c, score/src/coretodtickle.c, score/src/coretodtoseconds.c, score/src/coretodvalidate.c, score/src/heap.c, score/src/heapallocate.c, score/src/heapextend.c, score/src/heapfree.c, score/src/heapsizeofuserarea.c, score/src/interr.c, score/src/iterateoverthreads.c, score/src/mpci.c, score/src/object.c, score/src/objectallocate.c, score/src/objectallocatebyindex.c, score/src/objectclearname.c, score/src/objectcomparenameraw.c, score/src/objectcomparenamestring.c, score/src/objectcopynameraw.c, score/src/objectcopynamestring.c, score/src/objectextendinformation.c, score/src/objectfree.c, score/src/objectget.c, score/src/objectgetbyindex.c, score/src/objectgetisr.c, score/src/objectgetnoprotection.c, score/src/objectidtoname.c, score/src/objectinitializeinformation.c, score/src/objectmp.c, score/src/objectnametoid.c, score/src/objectshrinkinformation.c, score/src/thread.c, score/src/threadcreateidle.c, score/src/threadget.c, score/src/threadidlebody.c, score/src/threadinitialize.c, score/src/threadmp.c, score/src/threadq.c, score/src/threadqdequeuepriority.c, score/src/threadqenqueuepriority.c, score/src/threadqfirstpriority.c, score/src/threadqflush.c, score/src/threadreset.c, score/src/threadrestart.c, score/src/threadsettransient.c, score/src/threadstackallocate.c, score/src/threadstart.c, score/src/userext.c, score/src/watchdoginsert.c, score/src/wkspace.c: Convert to using c99 fixed size types.
  • Property mode set to 100644
File size: 2.2 KB
Line 
1/*
2 *  Thread Handler
3 *
4 *
5 *  COPYRIGHT (c) 1989-1999.
6 *  On-Line Applications Research Corporation (OAR).
7 *
8 *  The license and distribution terms for this file may be
9 *  found in found in the file LICENSE in this distribution or at
10 *  http://www.rtems.com/license/LICENSE.
11 *
12 *  $Id$
13 */
14
15#include <rtems/system.h>
16#include <rtems/score/apiext.h>
17#include <rtems/score/context.h>
18#include <rtems/score/interr.h>
19#include <rtems/score/isr.h>
20#include <rtems/score/object.h>
21#include <rtems/score/priority.h>
22#include <rtems/score/states.h>
23#include <rtems/score/sysstate.h>
24#include <rtems/score/thread.h>
25#include <rtems/score/threadq.h>
26#include <rtems/score/userext.h>
27#include <rtems/score/wkspace.h>
28
29/*PAGE
30 *
31 *  _Thread_Stack_Allocate
32 *
33 *  Allocate the requested stack space for the thread.
34 *  return the actual size allocated after any adjustment
35 *  or return zero if the allocation failed.
36 *  Set the Start.stack field to the address of the stack
37 */
38
39uint32_t   _Thread_Stack_Allocate(
40  Thread_Control *the_thread,
41  uint32_t   stack_size
42)
43{
44  void *stack_addr = 0;
45 
46  if ( !_Stack_Is_enough( stack_size ) )
47    stack_size = STACK_MINIMUM_SIZE;
48 
49  /*
50   * Call ONLY the CPU table stack allocate hook, _or_ the
51   * the RTEMS workspace allocate.  This is so the stack free
52   * routine can call the correct deallocation routine.
53   */
54
55  if ( _CPU_Table.stack_allocate_hook )
56  {
57    stack_addr = (*_CPU_Table.stack_allocate_hook)( stack_size );
58  } else {
59
60    /*
61     *  First pad the requested size so we allocate enough memory
62     *  so the context initialization can align it properly.  The address
63     *  returned the workspace allocate must be directly stored in the
64     *  stack control block because it is later used in the free sequence.
65     *
66     *  Thus it is the responsibility of the CPU dependent code to
67     *  get and keep the stack adjust factor, the stack alignment, and
68     *  the context initialization sequence in sync.
69     */
70
71    stack_size = _Stack_Adjust_size( stack_size );
72    stack_addr = _Workspace_Allocate( stack_size );
73  }
74 
75  if ( !stack_addr )
76      stack_size = 0;
77 
78  the_thread->Start.stack = stack_addr;
79 
80  return stack_size;
81}
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