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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [regionreturnsegment.c] - Blame information for rev 846

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/*
 *  Region Manager
 *
 *
 *  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: regionreturnsegment.c,v 1.2 2001-09-27 11:59:19 chris Exp $
 */
 
#ifdef RTEMS_REGION_SHRED_ON_FREE
#include <string.h>
 
#ifndef RTEMS_REGION_FREE_SHRED_PATTERN
#define RTEMS_REGION_FREE_SHRED_PATTERN 0x00
#endif
#endif
 
#include <rtems/system.h>
#include <rtems/rtems/status.h>
#include <rtems/rtems/support.h>
#include <rtems/score/object.h>
#include <rtems/rtems/options.h>
#include <rtems/rtems/region.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
 
/*PAGE
 *
 *  rtems_region_return_segment
 *
 *  This directive will return a segment to its region.
 *
 *  Input parameters:
 *    id      - region id
 *    segment - pointer to segment address
 *
 *  Output parameters:
 *    RTEMS_SUCCESSFUL - if successful
 *    error code        - if unsuccessful
 */
 
rtems_status_code rtems_region_return_segment(
  Objects_Id  id,
  void       *segment
)
{
  register Region_Control *the_region;
  Thread_Control          *the_thread;
  Objects_Locations        location;
  void                   **the_segment;
#ifdef RTEMS_REGION_FREE_SHRED_PATTERN
  unsigned32               size;
#endif
  int                      status;
 
  the_region = _Region_Get( id, &location );
  switch ( location ) {
 
    case OBJECTS_REMOTE:        /* this error cannot be returned */
      return RTEMS_INTERNAL_ERROR;
 
    case OBJECTS_ERROR:
      return RTEMS_INVALID_ID;
 
    case OBJECTS_LOCAL:
 
      _Region_Debug_Walk( the_region, 3 );
 
#ifdef RTEMS_REGION_FREE_SHRED_PATTERN
      if ( _Heap_Size_of_user_area( &the_region->Memory, segment, size ) ) {
        memset(segment, (RTEMS_REGION_FREE_SHRED_PATTERN & 0xFF), size);
      } else {
        _Thread_Enable_dispatch();
        return RTEMS_INVALID_ADDRESS;
      }
#endif
 
      status = _Region_Free_segment( the_region, segment );
 
      _Region_Debug_Walk( the_region, 4 );
 
      if ( !status ) {
        _Thread_Enable_dispatch();
        return RTEMS_INVALID_ADDRESS;
      }
 
      the_region->number_of_used_blocks -= 1;
      for ( ; ; ) {
        the_thread = _Thread_queue_First( &the_region->Wait_queue );
 
        if ( the_thread == NULL )
           break;
 
        the_segment = (void **) _Region_Allocate_segment(
           the_region,
           the_thread->Wait.count
        );
 
        if ( the_segment == NULL )
           break;
 
        *(void **)the_thread->Wait.return_argument = the_segment;
        the_region->number_of_used_blocks += 1;
        _Thread_queue_Extract( &the_region->Wait_queue, the_thread );
        the_thread->Wait.return_code = RTEMS_SUCCESSFUL;
      }
 
      _Thread_Enable_dispatch();
      return RTEMS_SUCCESSFUL;
  }
 
  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
}

Line No.	Rev	Author	Line
1	30	unneback	`/*`
2			`* Region Manager`
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 the file LICENSE in this distribution or at`
10			`* http://www.OARcorp.com/rtems/license.html.`
11			`*`
12			`* $Id: regionreturnsegment.c,v 1.2 2001-09-27 11:59:19 chris Exp $`
13			`*/`
14
15			`#ifdef RTEMS_REGION_SHRED_ON_FREE`
16			`#include <string.h>`
17
18			`#ifndef RTEMS_REGION_FREE_SHRED_PATTERN`
19			`#define RTEMS_REGION_FREE_SHRED_PATTERN 0x00`
20			`#endif`
21			`#endif`
22
23			`#include <rtems/system.h>`
24			`#include <rtems/rtems/status.h>`
25			`#include <rtems/rtems/support.h>`
26			`#include <rtems/score/object.h>`
27			`#include <rtems/rtems/options.h>`
28			`#include <rtems/rtems/region.h>`
29			`#include <rtems/score/states.h>`
30			`#include <rtems/score/thread.h>`
31
32			`/*PAGE`
33			`*`
34			`* rtems_region_return_segment`
35			`*`
36			`* This directive will return a segment to its region.`
37			`*`
38			`* Input parameters:`
39			`* id - region id`
40			`* segment - pointer to segment address`
41			`*`
42			`* Output parameters:`
43			`* RTEMS_SUCCESSFUL - if successful`
44			`* error code - if unsuccessful`
45			`*/`
46
47			`rtems_status_code rtems_region_return_segment(`
48			`Objects_Id id,`
49			`void *segment`
50			`)`
51			`{`
52			`register Region_Control *the_region;`
53			`Thread_Control *the_thread;`
54			`Objects_Locations location;`
55			`void **the_segment;`
56			`#ifdef RTEMS_REGION_FREE_SHRED_PATTERN`
57			`unsigned32 size;`
58			`#endif`
59			`int status;`
60
61			`the_region = _Region_Get( id, &location );`
62			`switch ( location ) {`
63
64			`case OBJECTS_REMOTE: /* this error cannot be returned */`
65			`return RTEMS_INTERNAL_ERROR;`
66
67			`case OBJECTS_ERROR:`
68			`return RTEMS_INVALID_ID;`
69
70			`case OBJECTS_LOCAL:`
71
72			`_Region_Debug_Walk( the_region, 3 );`
73
74			`#ifdef RTEMS_REGION_FREE_SHRED_PATTERN`
75			`if ( _Heap_Size_of_user_area( &the_region->Memory, segment, size ) ) {`
76			`memset(segment, (RTEMS_REGION_FREE_SHRED_PATTERN & 0xFF), size);`
77			`} else {`
78			`_Thread_Enable_dispatch();`
79			`return RTEMS_INVALID_ADDRESS;`
80			`}`
81			`#endif`
82
83			`status = _Region_Free_segment( the_region, segment );`
84
85			`_Region_Debug_Walk( the_region, 4 );`
86
87			`if ( !status ) {`
88			`_Thread_Enable_dispatch();`
89			`return RTEMS_INVALID_ADDRESS;`
90			`}`
91
92			`the_region->number_of_used_blocks -= 1;`
93			`for ( ; ; ) {`
94			`the_thread = _Thread_queue_First( &the_region->Wait_queue );`
95
96			`if ( the_thread == NULL )`
97			`break;`
98
99			`the_segment = (void **) _Region_Allocate_segment(`
100			`the_region,`
101			`the_thread->Wait.count`
102			`);`
103
104			`if ( the_segment == NULL )`
105			`break;`
106
107			`(void *)the_thread->Wait.return_argument = the_segment;`
108			`the_region->number_of_used_blocks += 1;`
109			`_Thread_queue_Extract( &the_region->Wait_queue, the_thread );`
110			`the_thread->Wait.return_code = RTEMS_SUCCESSFUL;`
111			`}`
112
113			`_Thread_Enable_dispatch();`
114			`return RTEMS_SUCCESSFUL;`
115			`}`
116
117			`return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */`
118			`}`

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [regionreturnsegment.c] - Blame information for rev 846