source: rtems/cpukit/libcsupport/src/newlibc_reent.c @ 69aa3349

4.115
Last change on this file since 69aa3349 was 69aa3349, checked in by Sebastian Huber <sebastian.huber@…>, on 04/08/14 at 07:42:29

score: Simplify thread control initialization

The thread control block contains fields that point to application
configuration dependent memory areas, like the scheduler information,
the API control blocks, the user extension context table, the RTEMS
notepads and the Newlib re-entrancy support. Account for these areas in
the configuration and avoid extra workspace allocations for these areas.

This helps also to avoid heap fragementation and reduces the per thread
memory due to a reduced heap allocation overhead.
  • Property mode set to 100644
File size: 1.0 KB
Line 
1/**
2 *  @file
3 *
4 *  @brief Newlib Support
5 *  @ingroup libcsupport
6 */
7
8/*
9 *  COPYRIGHT (c) 1994 by Division Incorporated
10 *
11 *  The license and distribution terms for this file may be
12 *  found in the file LICENSE in this distribution or at
13 *  http://www.rtems.org/license/LICENSE.
14 *
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <rtems.h>
22
23#if defined(RTEMS_NEWLIB)
24
25#include <sys/reent.h>
26#include <stdlib.h>
27#include <string.h>
28
29#include <rtems/libcsupport.h>
30#include <rtems/score/threadimpl.h>
31#include <rtems/score/wkspace.h>
32
33bool newlib_create_hook(
34  rtems_tcb *current_task __attribute__((unused)),
35  rtems_tcb *creating_task
36)
37{
38#if !defined(__DYNAMIC_REENT__)
39  if (_Thread_libc_reent == 0)
40  {
41    _REENT = _GLOBAL_REENT;
42
43    _Thread_Set_libc_reent (&_REENT);
44  }
45#endif
46
47  _REENT_INIT_PTR((creating_task->libc_reent)); /* GCC extension: structure constants */
48
49  return true;
50}
51
52void newlib_terminate_hook(
53  rtems_tcb *current_task
54)
55{
56  _reclaim_reent(current_task->libc_reent);
57}
58
59#endif
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