source: rtems/c/src/exec/posix/src/pthreadonce.c @ b04ee63

4.104.114.84.95
Last change on this file since b04ee63 was b04ee63, checked in by Joel Sherrill <joel.sherrill@…>, on 03/01/02 at 17:49:57

2002-03-01 Eric Norum <eric.norum@…>

  • src/pthreadonce.c: Task is not preemptable while running a pthread_once init function. This is slightly less heavy handed than disabling dispatching and seems better than consuming a mutex.
  • Property mode set to 100644
File size: 1.0 KB
Line 
1/*
2 *  16.1.8 Dynamic Package Initialization, P1003.1c/Draft 10, p. 154
3 *
4 *  COPYRIGHT (c) 1989-1999.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.OARcorp.com/rtems/license.html.
10 *
11 *  $Id$
12 */
13
14#if HAVE_CONFIG_H
15#include "config.h"
16#endif
17
18#include <pthread.h>
19#include <errno.h>
20
21#include <rtems.h>
22#include <rtems/system.h>
23#include <rtems/score/thread.h>
24
25int pthread_once(
26  pthread_once_t  *once_control,
27  void           (*init_routine)(void)
28)
29{
30  if ( !once_control || !init_routine )
31    return EINVAL;
32
33  if ( !once_control->init_executed ) {
34    rtems_mode saveMode;
35    rtems_task_mode(RTEMS_NO_PREEMPT, RTEMS_PREEMPT_MASK, &saveMode);
36    if ( !once_control->init_executed ) {
37      once_control->is_initialized = TRUE;
38      once_control->init_executed = TRUE;
39      (*init_routine)();
40    }
41    rtems_task_mode(saveMode, RTEMS_PREEMPT_MASK, &saveMode);
42  }
43  return 0;
44}
45
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