1 | /* |
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2 | * Partition Manager |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989-1999. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in the file LICENSE in this distribution or at |
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10 | * http://www.OARcorp.com/rtems/license.html. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | #include <rtems/system.h> |
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16 | #include <rtems/rtems/status.h> |
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17 | #include <rtems/rtems/support.h> |
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18 | #include <rtems/score/address.h> |
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19 | #include <rtems/score/object.h> |
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20 | #include <rtems/rtems/part.h> |
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21 | #include <rtems/score/thread.h> |
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22 | #include <rtems/score/sysstate.h> |
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23 | |
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24 | /*PAGE |
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25 | * |
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26 | * rtems_partition_return_buffer |
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27 | * |
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28 | * This directive will return the given buffer to the specified |
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29 | * buffer partition. |
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30 | * |
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31 | * Input parameters: |
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32 | * id - partition id |
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33 | * buffer - pointer to buffer address |
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34 | * |
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35 | * Output parameters: |
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36 | * RTEMS_SUCCESSFUL - if successful |
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37 | * error code - if unsuccessful |
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38 | */ |
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39 | |
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40 | rtems_status_code rtems_partition_return_buffer( |
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41 | Objects_Id id, |
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42 | void *buffer |
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43 | ) |
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44 | { |
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45 | register Partition_Control *the_partition; |
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46 | Objects_Locations location; |
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47 | |
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48 | the_partition = _Partition_Get( id, &location ); |
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49 | switch ( location ) { |
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50 | |
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51 | case OBJECTS_REMOTE: |
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52 | #if defined(RTEMS_MULTIPROCESSING) |
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53 | return _Partition_MP_Send_request_packet( |
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54 | PARTITION_MP_RETURN_BUFFER_REQUEST, |
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55 | id, |
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56 | buffer |
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57 | ); |
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58 | #endif |
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59 | |
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60 | case OBJECTS_ERROR: |
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61 | return RTEMS_INVALID_ID; |
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62 | |
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63 | case OBJECTS_LOCAL: |
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64 | if ( _Partition_Is_buffer_valid( buffer, the_partition ) ) { |
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65 | _Partition_Free_buffer( the_partition, buffer ); |
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66 | the_partition->number_of_used_blocks -= 1; |
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67 | _Thread_Enable_dispatch(); |
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68 | return RTEMS_SUCCESSFUL; |
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69 | } |
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70 | _Thread_Enable_dispatch(); |
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71 | return RTEMS_INVALID_ADDRESS; |
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72 | } |
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73 | |
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74 | return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ |
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75 | } |
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