1 | /* |
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2 | * Copyright (c) 2012 embedded brains GmbH. All rights reserved. |
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3 | * |
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4 | * embedded brains GmbH |
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5 | * Obere Lagerstr. 30 |
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6 | * 82178 Puchheim |
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7 | * Germany |
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8 | * <rtems@embedded-brains.de> |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.com/license/LICENSE. |
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13 | */ |
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14 | |
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15 | #if HAVE_CONFIG_H |
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16 | #include "config.h" |
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17 | #endif |
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18 | |
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19 | #include <rtems/score/heap.h> |
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20 | |
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21 | Heap_Block *_Heap_Greedy_allocate( |
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22 | Heap_Control *heap, |
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23 | const uintptr_t *block_sizes, |
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24 | size_t block_count |
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25 | ) |
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26 | { |
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27 | Heap_Block *const free_list_tail = _Heap_Free_list_tail( heap ); |
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28 | Heap_Block *allocated_blocks = NULL; |
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29 | Heap_Block *blocks = NULL; |
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30 | Heap_Block *current; |
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31 | size_t i; |
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32 | |
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33 | for (i = 0; i < block_count; ++i) { |
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34 | void *next = _Heap_Allocate( heap, block_sizes [i] ); |
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35 | |
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36 | if ( next != NULL ) { |
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37 | Heap_Block *next_block = _Heap_Block_of_alloc_area( |
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38 | (uintptr_t) next, |
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39 | heap->page_size |
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40 | ); |
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41 | |
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42 | next_block->next = allocated_blocks; |
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43 | allocated_blocks = next_block; |
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44 | } |
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45 | } |
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46 | |
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47 | while ( (current = _Heap_Free_list_first( heap )) != free_list_tail ) { |
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48 | _Heap_Block_allocate( |
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49 | heap, |
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50 | current, |
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51 | _Heap_Alloc_area_of_block( current ), |
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52 | _Heap_Block_size( current ) - HEAP_BLOCK_HEADER_SIZE |
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53 | ); |
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54 | |
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55 | current->next = blocks; |
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56 | blocks = current; |
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57 | } |
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58 | |
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59 | while ( allocated_blocks != NULL ) { |
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60 | current = allocated_blocks; |
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61 | allocated_blocks = allocated_blocks->next; |
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62 | _Heap_Free( heap, (void *) _Heap_Alloc_area_of_block( current ) ); |
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63 | } |
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64 | |
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65 | return blocks; |
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66 | } |
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67 | |
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68 | void _Heap_Greedy_free( |
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69 | Heap_Control *heap, |
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70 | Heap_Block *blocks |
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71 | ) |
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72 | { |
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73 | while ( blocks != NULL ) { |
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74 | Heap_Block *current = blocks; |
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75 | |
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76 | blocks = blocks->next; |
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77 | _Heap_Free( heap, (void *) _Heap_Alloc_area_of_block( current ) ); |
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78 | } |
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79 | } |
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