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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [semdelete.c] - Blame information for rev 751

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/*
 *  Semaphore Manager
 *
 *  DESCRIPTION:
 *
 *  This package is the implementation of the Semaphore Manager.
 *  This manager utilizes standard Dijkstra counting semaphores to provide
 *  synchronization and mutual exclusion capabilities.
 *
 *  Directives provided are:
 *
 *     + create a semaphore
 *     + get an ID of a semaphore
 *     + delete a semaphore
 *     + acquire a semaphore
 *     + release a semaphore
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id: semdelete.c,v 1.2 2001-09-27 11:59:19 chris Exp $
 */
 
#include <rtems/system.h>
#include <rtems/rtems/status.h>
#include <rtems/rtems/support.h>
#include <rtems/rtems/attr.h>
#include <rtems/score/isr.h>
#include <rtems/score/object.h>
#include <rtems/rtems/options.h>
#include <rtems/rtems/sem.h>
#include <rtems/score/coremutex.h>
#include <rtems/score/coresem.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/score/mpci.h>
#endif
#include <rtems/score/sysstate.h>
 
#include <rtems/score/interr.h>
 
/*PAGE
 *
 *  rtems_semaphore_delete
 *
 *  This directive allows a thread to delete a semaphore specified by
 *  the semaphore id.  The semaphore is freed back to the inactive
 *  semaphore chain.
 *
 *  Input parameters:
 *    id - semaphore id
 *
 *  Output parameters:
 *    RTEMS_SUCCESSFUL - if successful
 *    error code        - if unsuccessful
 */
 
#if defined(RTEMS_MULTIPROCESSING)
#define SEMAPHORE_MP_OBJECT_WAS_DELETED _Semaphore_MP_Send_object_was_deleted
#else
#define SEMAPHORE_MP_OBJECT_WAS_DELETED NULL
#endif
 
rtems_status_code rtems_semaphore_delete(
  Objects_Id id
)
{
  register Semaphore_Control *the_semaphore;
  Objects_Locations           location;
 
  the_semaphore = _Semaphore_Get( id, &location );
  switch ( location ) {
 
    case OBJECTS_REMOTE:
#if defined(RTEMS_MULTIPROCESSING)
      _Thread_Dispatch();
      return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
#endif
 
    case OBJECTS_ERROR:
      return RTEMS_INVALID_ID;
 
    case OBJECTS_LOCAL:
      if ( !_Attributes_Is_counting_semaphore(the_semaphore->attribute_set) ) {
        if ( _CORE_mutex_Is_locked( &the_semaphore->Core_control.mutex ) &&
             !_Attributes_Is_simple_binary_semaphore(
                 the_semaphore->attribute_set ) ) {
          _Thread_Enable_dispatch();
          return RTEMS_RESOURCE_IN_USE;
        }
        _CORE_mutex_Flush(
          &the_semaphore->Core_control.mutex,
          SEMAPHORE_MP_OBJECT_WAS_DELETED,
          CORE_MUTEX_WAS_DELETED
        );
      } else {
        _CORE_semaphore_Flush(
          &the_semaphore->Core_control.semaphore,
          SEMAPHORE_MP_OBJECT_WAS_DELETED,
          CORE_SEMAPHORE_WAS_DELETED
        );
     }
 
      _Objects_Close( &_Semaphore_Information, &the_semaphore->Object );
 
      _Semaphore_Free( the_semaphore );
 
#if defined(RTEMS_MULTIPROCESSING)
      if ( _Attributes_Is_global( the_semaphore->attribute_set ) ) {
 
        _Objects_MP_Close( &_Semaphore_Information, the_semaphore->Object.id );
 
        _Semaphore_MP_Send_process_packet(
          SEMAPHORE_MP_ANNOUNCE_DELETE,
          the_semaphore->Object.id,
          0,                         /* Not used */
 
        );
      }
#endif
      _Thread_Enable_dispatch();
      return RTEMS_SUCCESSFUL;
  }
 
  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
}

Line No.	Rev	Author	Line
1	30	unneback	`/*`
2			`* Semaphore Manager`
3			`*`
4			`* DESCRIPTION:`
5			`*`
6			`* This package is the implementation of the Semaphore Manager.`
7			`* This manager utilizes standard Dijkstra counting semaphores to provide`
8			`* synchronization and mutual exclusion capabilities.`
9			`*`
10			`* Directives provided are:`
11			`*`
12			`* + create a semaphore`
13			`* + get an ID of a semaphore`
14			`* + delete a semaphore`
15			`* + acquire a semaphore`
16			`* + release a semaphore`
17			`*`
18			`* COPYRIGHT (c) 1989-1999.`
19			`* On-Line Applications Research Corporation (OAR).`
20			`*`
21			`* The license and distribution terms for this file may be`
22			`* found in the file LICENSE in this distribution or at`
23			`* http://www.OARcorp.com/rtems/license.html.`
24			`*`
25			`* $Id: semdelete.c,v 1.2 2001-09-27 11:59:19 chris Exp $`
26			`*/`
27
28			`#include <rtems/system.h>`
29			`#include <rtems/rtems/status.h>`
30			`#include <rtems/rtems/support.h>`
31			`#include <rtems/rtems/attr.h>`
32			`#include <rtems/score/isr.h>`
33			`#include <rtems/score/object.h>`
34			`#include <rtems/rtems/options.h>`
35			`#include <rtems/rtems/sem.h>`
36			`#include <rtems/score/coremutex.h>`
37			`#include <rtems/score/coresem.h>`
38			`#include <rtems/score/states.h>`
39			`#include <rtems/score/thread.h>`
40			`#include <rtems/score/threadq.h>`
41			`#if defined(RTEMS_MULTIPROCESSING)`
42			`#include <rtems/score/mpci.h>`
43			`#endif`
44			`#include <rtems/score/sysstate.h>`
45
46			`#include <rtems/score/interr.h>`
47
48			`/*PAGE`
49			`*`
50			`* rtems_semaphore_delete`
51			`*`
52			`* This directive allows a thread to delete a semaphore specified by`
53			`* the semaphore id. The semaphore is freed back to the inactive`
54			`* semaphore chain.`
55			`*`
56			`* Input parameters:`
57			`* id - semaphore id`
58			`*`
59			`* Output parameters:`
60			`* RTEMS_SUCCESSFUL - if successful`
61			`* error code - if unsuccessful`
62			`*/`
63
64			`#if defined(RTEMS_MULTIPROCESSING)`
65			`#define SEMAPHORE_MP_OBJECT_WAS_DELETED _Semaphore_MP_Send_object_was_deleted`
66			`#else`
67			`#define SEMAPHORE_MP_OBJECT_WAS_DELETED NULL`
68			`#endif`
69
70			`rtems_status_code rtems_semaphore_delete(`
71			`Objects_Id id`
72			`)`
73			`{`
74			`register Semaphore_Control *the_semaphore;`
75			`Objects_Locations location;`
76
77			`the_semaphore = _Semaphore_Get( id, &location );`
78			`switch ( location ) {`
79
80			`case OBJECTS_REMOTE:`
81			`#if defined(RTEMS_MULTIPROCESSING)`
82			`_Thread_Dispatch();`
83			`return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;`
84			`#endif`
85
86			`case OBJECTS_ERROR:`
87			`return RTEMS_INVALID_ID;`
88
89			`case OBJECTS_LOCAL:`
90			`if ( !_Attributes_Is_counting_semaphore(the_semaphore->attribute_set) ) {`
91			`if ( _CORE_mutex_Is_locked( &the_semaphore->Core_control.mutex ) &&`
92			`!_Attributes_Is_simple_binary_semaphore(`
93			`the_semaphore->attribute_set ) ) {`
94			`_Thread_Enable_dispatch();`
95			`return RTEMS_RESOURCE_IN_USE;`
96			`}`
97			`_CORE_mutex_Flush(`
98			`&the_semaphore->Core_control.mutex,`
99			`SEMAPHORE_MP_OBJECT_WAS_DELETED,`
100			`CORE_MUTEX_WAS_DELETED`
101			`);`
102			`} else {`
103			`_CORE_semaphore_Flush(`
104			`&the_semaphore->Core_control.semaphore,`
105			`SEMAPHORE_MP_OBJECT_WAS_DELETED,`
106			`CORE_SEMAPHORE_WAS_DELETED`
107			`);`
108			`}`
109
110			`_Objects_Close( &_Semaphore_Information, &the_semaphore->Object );`
111
112			`_Semaphore_Free( the_semaphore );`
113
114			`#if defined(RTEMS_MULTIPROCESSING)`
115			`if ( _Attributes_Is_global( the_semaphore->attribute_set ) ) {`
116
117			`_Objects_MP_Close( &_Semaphore_Information, the_semaphore->Object.id );`
118
119			`_Semaphore_MP_Send_process_packet(`
120			`SEMAPHORE_MP_ANNOUNCE_DELETE,`
121			`the_semaphore->Object.id,`
122			`0, /* Not used */`
123
124			`);`
125			`}`
126			`#endif`
127			`_Thread_Enable_dispatch();`
128			`return RTEMS_SUCCESSFUL;`
129			`}`
130
131			`return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */`
132			`}`

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [semdelete.c] - Blame information for rev 751