source: rtems/cpukit/posix/src/semaphore.c @ 3c465878

4.104.114.84.95
Last change on this file since 3c465878 was 3c465878, checked in by Joel Sherrill <joel.sherrill@…>, on 07/01/02 at 22:33:47

2002-07-01 Joel Sherrill <joel@…>

  • Mega patch merge to change the format of the object IDs to loosen the dependency between the SCORE and the various APIs. There was considerable work to simplify the object name management and it appears that the name_table field is no longer needed. This patch also includes the addition of the internal mutex which is currently only used to protect some types of allocation and deallocation. This significantly can reduce context switch latency under certain circumstances. In particular, some heap/region operations were O(n) and had dispatching disabled. This should help enormously. With this merge, the patch is not as clean as it should be. In particular, the documentation has not been modified to reflect the new object ID layout, the IDs in the test screens are not updated, and _Objects_Get_information needs to be a real routine not inlined. As part of this patch a lot of MP code for thread/proxy blocking was made conditional and cleaned up.
  • include/rtems/posix/key.h, src/cond.c, src/condinit.c, src/intr.c, src/key.c, src/keycreate.c, src/keydelete.c, src/killinfo.c, src/mqueue.c, src/mqueuecreatesupp.c, src/mutex.c, src/mutexinit.c, src/psignal.c, src/pthread.c, src/semaphore.c, src/semaphorecreatesupp.c: Modified as part of above.
  • Property mode set to 100644
File size: 1.4 KB
Line 
1/*
2 *  $Id$
3 */
4
5#if HAVE_CONFIG_H
6#include "config.h"
7#endif
8
9#include <stdarg.h>
10
11#include <errno.h>
12#include <fcntl.h>
13#include <pthread.h>
14#include <semaphore.h>
15#include <limits.h>
16
17#include <rtems/system.h>
18#include <rtems/score/object.h>
19#include <rtems/posix/semaphore.h>
20#include <rtems/posix/time.h>
21#include <rtems/seterr.h>
22
23/*PAGE
24 *
25 *  _POSIX_Semaphore_Manager_initialization
26 *
27 *  This routine initializes all semaphore manager related data structures.
28 *
29 *  Input parameters:
30 *    maximum_semaphores - maximum configured semaphores
31 *
32 *  Output parameters:  NONE
33 */
34 
35void _POSIX_Semaphore_Manager_initialization(
36  unsigned32 maximum_semaphores
37)
38{
39  _Objects_Initialize_information(
40    &_POSIX_Semaphore_Information, /* object information table */
41    OBJECTS_POSIX_API,             /* object API */
42    OBJECTS_POSIX_SEMAPHORES,      /* object class */
43    maximum_semaphores             /* maximum objects of this class */,
44    sizeof( POSIX_Semaphore_Control ),
45                                /* size of this object's control block */
46    FALSE,                      /* TRUE if names for this object are strings */
47    _POSIX_PATH_MAX             /* maximum length of each object's name */
48#if defined(RTEMS_MULTIPROCESSING)
49    ,
50    FALSE,                      /* TRUE if this is a global object class */
51    NULL                        /* Proxy extraction support callout */
52#endif
53  );
54}
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