source: rtems/cpukit/score/src/threadstackallocate.c @ 976162a6

4.104.114.9
Last change on this file since 976162a6 was 976162a6, checked in by Joel Sherrill <joel.sherrill@…>, on Dec 3, 2007 at 10:23:13 PM

2007-12-03 Joel Sherrill <joel.sherrill@…>

  • libcsupport/src/malloc.c, libmisc/monitor/mon-command.c, posix/preinstall.am, posix/include/rtems/posix/cond.h, posix/include/rtems/posix/mqueue.h, posix/include/rtems/posix/mutex.h, posix/include/rtems/posix/pthread.h, posix/include/rtems/posix/semaphore.h, posix/src/conddestroy.c, posix/src/mutexdestroy.c, posix/src/mutexinit.c, posix/src/mutexsetprioceiling.c, posix/src/mutexunlock.c, sapi/include/confdefs.h, sapi/include/rtems/config.h, sapi/include/rtems/init.h, sapi/include/rtems/sptables.h, sapi/src/exinit.c, score/include/rtems/system.h, score/include/rtems/score/mpci.h, score/src/mpci.c, score/src/thread.c, score/src/threadcreateidle.c, score/src/threadstackallocate.c, score/src/threadstackfree.c, score/src/wkspace.c: Moved most of the remaining CPU Table fields to the Configuration Table. This included pretasking_hook, predriver_hook, postdriver_hook, idle_task, do_zero_of_workspace, extra_mpci_receive_server_stack, stack_allocate_hook, and stack_free_hook. As a side-effect of this effort some multiprocessing code was made conditional and some style clean up occurred.
  • Property mode set to 100644
File size: 2.3 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#if HAVE_CONFIG_H
16#include "config.h"
17#endif
18
19#include <rtems/system.h>
20#include <rtems/score/apiext.h>
21#include <rtems/score/context.h>
22#include <rtems/score/interr.h>
23#include <rtems/score/isr.h>
24#include <rtems/score/object.h>
25#include <rtems/score/priority.h>
26#include <rtems/score/states.h>
27#include <rtems/score/sysstate.h>
28#include <rtems/score/thread.h>
29#include <rtems/score/threadq.h>
30#include <rtems/score/userext.h>
31#include <rtems/score/wkspace.h>
32#include <rtems/config.h>
33
34/*PAGE
35 *
36 *  _Thread_Stack_Allocate
37 *
38 *  Allocate the requested stack space for the thread.
39 *  return the actual size allocated after any adjustment
40 *  or return zero if the allocation failed.
41 *  Set the Start.stack field to the address of the stack
42 */
43
44size_t _Thread_Stack_Allocate(
45  Thread_Control *the_thread,
46  size_t          stack_size
47)
48{
49  void *stack_addr = 0;
50  size_t the_stack_size = stack_size;
51
52  if ( !_Stack_Is_enough( the_stack_size ) )
53    the_stack_size = STACK_MINIMUM_SIZE;
54
55  /*
56   * Call ONLY the CPU table stack allocate hook, _or_ the
57   * the RTEMS workspace allocate.  This is so the stack free
58   * routine can call the correct deallocation routine.
59   */
60
61  if ( _Configuration_Table->stack_allocate_hook ) {
62    stack_addr = (*_Configuration_Table->stack_allocate_hook)( the_stack_size );
63  } else {
64
65    /*
66     *  First pad the requested size so we allocate enough memory
67     *  so the context initialization can align it properly.  The address
68     *  returned the workspace allocate must be directly stored in the
69     *  stack control block because it is later used in the free sequence.
70     *
71     *  Thus it is the responsibility of the CPU dependent code to
72     *  get and keep the stack adjust factor, the stack alignment, and
73     *  the context initialization sequence in sync.
74     */
75
76    the_stack_size = _Stack_Adjust_size( the_stack_size );
77    stack_addr = _Workspace_Allocate( the_stack_size );
78  }
79
80  if ( !stack_addr )
81    the_stack_size = 0;
82
83  the_thread->Start.stack = stack_addr;
84
85  return the_stack_size;
86}
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