1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
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2 | |
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3 | /** |
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4 | * @file |
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5 | * |
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6 | * @ingroup RTEMSImplClassic |
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7 | * |
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8 | * @brief This source file contains the implementation of |
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9 | * rtems_workspace_greedy_allocate(), |
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10 | * rtems_workspace_greedy_allocate_all_except_largest(), and |
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11 | * rtems_workspace_greedy_free(). |
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12 | */ |
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13 | |
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14 | /* |
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15 | * Copyright (c) 2012 embedded brains GmbH. All rights reserved. |
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16 | * |
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17 | * Redistribution and use in source and binary forms, with or without |
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18 | * modification, are permitted provided that the following conditions |
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19 | * are met: |
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20 | * 1. Redistributions of source code must retain the above copyright |
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21 | * notice, this list of conditions and the following disclaimer. |
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22 | * 2. Redistributions in binary form must reproduce the above copyright |
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23 | * notice, this list of conditions and the following disclaimer in the |
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24 | * documentation and/or other materials provided with the distribution. |
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25 | * |
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26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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27 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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30 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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31 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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32 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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33 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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34 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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35 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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36 | * POSSIBILITY OF SUCH DAMAGE. |
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37 | */ |
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38 | |
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39 | #ifdef HAVE_CONFIG_H |
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40 | #include "config.h" |
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41 | #endif |
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42 | |
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43 | #include <rtems/rtems/support.h> |
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44 | #include <rtems/score/apimutex.h> |
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45 | #include <rtems/score/heapimpl.h> |
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46 | #include <rtems/score/threaddispatch.h> |
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47 | #include <rtems/score/wkspace.h> |
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48 | #include <rtems/malloc.h> |
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49 | |
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50 | #define SBRK_ALLOC_SIZE (128 * 1024UL * 1024UL) |
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51 | |
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52 | void *rtems_workspace_greedy_allocate( |
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53 | const uintptr_t *block_sizes, |
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54 | size_t block_count |
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55 | ) |
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56 | { |
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57 | Heap_Control *heap = &_Workspace_Area; |
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58 | void *opaque; |
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59 | |
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60 | rtems_heap_sbrk_greedy_allocate( heap, SBRK_ALLOC_SIZE ); |
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61 | |
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62 | _RTEMS_Lock_allocator(); |
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63 | opaque = _Heap_Greedy_allocate( heap, block_sizes, block_count ); |
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64 | _RTEMS_Unlock_allocator(); |
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65 | |
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66 | return opaque; |
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67 | } |
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68 | |
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69 | void *rtems_workspace_greedy_allocate_all_except_largest( |
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70 | uintptr_t *allocatable_size |
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71 | ) |
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72 | { |
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73 | Heap_Control *heap = &_Workspace_Area; |
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74 | void *opaque; |
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75 | |
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76 | rtems_heap_sbrk_greedy_allocate( heap, SBRK_ALLOC_SIZE ); |
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77 | |
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78 | _RTEMS_Lock_allocator(); |
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79 | opaque = _Heap_Greedy_allocate_all_except_largest( |
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80 | heap, |
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81 | allocatable_size |
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82 | ); |
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83 | _RTEMS_Unlock_allocator(); |
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84 | |
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85 | return opaque; |
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86 | } |
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87 | |
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88 | void rtems_workspace_greedy_free( void *opaque ) |
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89 | { |
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90 | _RTEMS_Lock_allocator(); |
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91 | _Heap_Greedy_free( &_Workspace_Area, opaque ); |
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92 | _RTEMS_Unlock_allocator(); |
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93 | } |
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