diff options
author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-05-17 22:39:20 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1999-05-17 22:39:20 +0000 |
commit | 5aa64518b5bb046469386afbe530957dbb28a603 (patch) | |
tree | 82857bb660a02dea8a2c457507dfb901535f5df1 /c/src/exec/rtems/src/regionreturnsegment.c | |
parent | Splitting the Thread Handler forced the inclusion of more prototypes. (diff) | |
download | rtems-5aa64518b5bb046469386afbe530957dbb28a603.tar.bz2 |
Split Region Manager into one routine per file.
Diffstat (limited to 'c/src/exec/rtems/src/regionreturnsegment.c')
-rw-r--r-- | c/src/exec/rtems/src/regionreturnsegment.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/c/src/exec/rtems/src/regionreturnsegment.c b/c/src/exec/rtems/src/regionreturnsegment.c new file mode 100644 index 0000000000..7910d26e8d --- /dev/null +++ b/c/src/exec/rtems/src/regionreturnsegment.c @@ -0,0 +1,115 @@ +/* + * Region Manager + * + * + * COPYRIGHT (c) 1989-1998. + * On-Line Applications Research Corporation (OAR). + * Copyright assigned to U.S. Government, 1994. + * + * 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. + * + * $Id$ + */ + +#ifdef RTEMS_REGION_FREE_SHRED_PATTERN +#include <string.h> +#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_BYTE & 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 */ +} |