1 | /* |
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2 | * Region Manager |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989-2007. |
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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.rtems.com/license/LICENSE. |
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11 | */ |
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12 | |
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13 | #if HAVE_CONFIG_H |
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14 | #include "config.h" |
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15 | #endif |
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16 | |
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17 | #include <rtems/system.h> |
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18 | #include <rtems/rtems/status.h> |
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19 | #include <rtems/rtems/support.h> |
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20 | #include <rtems/score/object.h> |
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21 | #include <rtems/rtems/options.h> |
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22 | #include <rtems/rtems/region.h> |
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23 | #include <rtems/score/states.h> |
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24 | #include <rtems/score/thread.h> |
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25 | #include <rtems/score/apimutex.h> |
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26 | |
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27 | /* |
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28 | * rtems_region_resize_segment |
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29 | * |
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30 | * This directive will try to resize segment to the new size 'size' |
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31 | * "in place". |
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32 | * |
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33 | * Input parameters: |
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34 | * id - region id |
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35 | * segment - pointer to segment address |
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36 | * size - new required size |
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37 | * |
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38 | * Output parameters: |
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39 | * RTEMS_SUCCESSFUL - if successful |
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40 | * error code - if unsuccessful |
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41 | */ |
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42 | |
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43 | rtems_status_code rtems_region_resize_segment( |
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44 | rtems_id id, |
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45 | void *segment, |
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46 | uintptr_t size, |
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47 | uintptr_t *old_size |
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48 | ) |
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49 | { |
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50 | uintptr_t avail_size; |
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51 | Objects_Locations location; |
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52 | uintptr_t osize; |
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53 | rtems_status_code return_status; |
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54 | Heap_Resize_status status; |
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55 | register Region_Control *the_region; |
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56 | |
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57 | if ( !old_size ) |
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58 | return RTEMS_INVALID_ADDRESS; |
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59 | |
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60 | _RTEMS_Lock_allocator(); |
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61 | |
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62 | the_region = _Region_Get( id, &location ); |
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63 | switch ( location ) { |
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64 | |
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65 | case OBJECTS_LOCAL: |
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66 | |
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67 | _Region_Debug_Walk( the_region, 7 ); |
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68 | |
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69 | status = _Heap_Resize_block( |
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70 | &the_region->Memory, |
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71 | segment, |
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72 | (uint32_t) size, |
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73 | &osize, |
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74 | &avail_size |
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75 | ); |
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76 | *old_size = (uint32_t) osize; |
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77 | |
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78 | _Region_Debug_Walk( the_region, 8 ); |
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79 | |
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80 | if ( status == HEAP_RESIZE_SUCCESSFUL ) |
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81 | _Region_Process_queue( the_region ); /* unlocks allocator */ |
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82 | else |
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83 | _RTEMS_Unlock_allocator(); |
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84 | |
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85 | |
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86 | if (status == HEAP_RESIZE_SUCCESSFUL) |
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87 | return RTEMS_SUCCESSFUL; |
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88 | if (status == HEAP_RESIZE_UNSATISFIED) |
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89 | return RTEMS_UNSATISFIED; |
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90 | return RTEMS_INVALID_ADDRESS; |
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91 | break; |
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92 | |
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93 | #if defined(RTEMS_MULTIPROCESSING) |
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94 | case OBJECTS_REMOTE: /* this error cannot be returned */ |
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95 | break; |
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96 | #endif |
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97 | |
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98 | case OBJECTS_ERROR: |
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99 | default: |
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100 | return_status = RTEMS_INVALID_ID; |
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101 | break; |
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102 | } |
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103 | |
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104 | _RTEMS_Unlock_allocator(); |
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105 | return return_status; |
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106 | } |
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