[457] | 1 | // Copyright (c) Microsoft. All rights reserved.
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| 2 | // Licensed under the MIT license. See LICENSE file in the project root for full license information.
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| 3 |
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| 4 | #include <stdlib.h>
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| 5 | #include <stdint.h>
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| 6 | #include "azure_c_shared_utility/lock.h"
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| 7 | #include "azure_c_shared_utility/optimize_size.h"
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| 8 | #include "azure_c_shared_utility/xlogging.h"
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| 9 |
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| 10 | #ifndef GB_USE_CUSTOM_HEAP
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| 11 |
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| 12 | #ifndef SIZE_MAX
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| 13 | #define SIZE_MAX ((size_t)~(size_t)0)
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| 14 | #endif
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| 15 |
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| 16 | typedef struct ALLOCATION_TAG
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| 17 | {
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| 18 | size_t size;
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| 19 | void* ptr;
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| 20 | void* next;
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| 21 | } ALLOCATION;
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| 22 |
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| 23 | typedef enum GBALLOC_STATE_TAG
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| 24 | {
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| 25 | GBALLOC_STATE_INIT,
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| 26 | GBALLOC_STATE_NOT_INIT
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| 27 | } GBALLOC_STATE;
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| 28 |
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| 29 | static ALLOCATION* head = NULL;
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| 30 | static size_t totalSize = 0;
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| 31 | static size_t maxSize = 0;
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| 32 | static size_t g_allocations = 0;
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| 33 | static GBALLOC_STATE gballocState = GBALLOC_STATE_NOT_INIT;
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| 34 |
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| 35 | static LOCK_HANDLE gballocThreadSafeLock = NULL;
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| 36 |
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| 37 | int gballoc_init(void)
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| 38 | {
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| 39 | int result;
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| 40 |
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| 41 | if (gballocState != GBALLOC_STATE_NOT_INIT)
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| 42 | {
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| 43 | /* Codes_SRS_GBALLOC_01_025: [Init after Init shall fail and return a non-zero value.] */
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| 44 | result = MU_FAILURE;
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| 45 | }
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| 46 | /* Codes_SRS_GBALLOC_01_026: [gballoc_Init shall create a lock handle that will be used to make the other gballoc APIs thread-safe.] */
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| 47 | else if ((gballocThreadSafeLock = Lock_Init()) == NULL)
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| 48 | {
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| 49 | /* Codes_SRS_GBALLOC_01_027: [If the Lock creation fails, gballoc_init shall return a non-zero value.]*/
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| 50 | result = MU_FAILURE;
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| 51 | }
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| 52 | else
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| 53 | {
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| 54 | gballocState = GBALLOC_STATE_INIT;
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| 55 |
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| 56 | /* Codes_ SRS_GBALLOC_01_002: [Upon initialization the total memory used and maximum total memory used tracked by the module shall be set to 0.] */
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| 57 | totalSize = 0;
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| 58 | maxSize = 0;
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| 59 | g_allocations = 0;
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| 60 |
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| 61 | /* Codes_SRS_GBALLOC_01_024: [gballoc_init shall initialize the gballoc module and return 0 upon success.] */
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| 62 | result = 0;
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| 63 | }
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| 64 |
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| 65 | return result;
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| 66 | }
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| 67 |
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| 68 | void gballoc_deinit(void)
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| 69 | {
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| 70 | if (gballocState == GBALLOC_STATE_INIT)
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| 71 | {
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| 72 | /* Codes_SRS_GBALLOC_01_028: [gballoc_deinit shall free all resources allocated by gballoc_init.] */
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| 73 | (void)Lock_Deinit(gballocThreadSafeLock);
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| 74 | }
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| 75 |
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| 76 | gballocState = GBALLOC_STATE_NOT_INIT;
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| 77 | }
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| 78 |
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| 79 | void* gballoc_malloc(size_t size)
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| 80 | {
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| 81 | void* result;
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| 82 |
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| 83 | if (gballocState != GBALLOC_STATE_INIT)
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| 84 | {
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| 85 | /* Codes_SRS_GBALLOC_01_039: [If gballoc was not initialized gballoc_malloc shall simply call malloc without any memory tracking being performed.] */
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| 86 | result = malloc(size);
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| 87 | }
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| 88 | /* Codes_SRS_GBALLOC_01_030: [gballoc_malloc shall ensure thread safety by using the lock created by gballoc_Init.] */
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| 89 | else if (LOCK_OK != Lock(gballocThreadSafeLock))
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| 90 | {
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| 91 | /* Codes_SRS_GBALLOC_01_048: [If acquiring the lock fails, gballoc_malloc shall return NULL.] */
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| 92 | LogError("Failed to get the Lock.");
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| 93 | result = NULL;
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| 94 | }
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| 95 | else
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| 96 | {
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| 97 | ALLOCATION* allocation = (ALLOCATION*)calloc(1, sizeof(ALLOCATION));
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| 98 | if (allocation == NULL)
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| 99 | {
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| 100 | result = NULL;
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| 101 | }
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| 102 | else
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| 103 | {
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| 104 | /* Codes_SRS_GBALLOC_01_003: [gb_malloc shall call the C99 malloc function and return its result.] */
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| 105 | result = malloc(size);
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| 106 | if (result == NULL)
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| 107 | {
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| 108 | /* Codes_SRS_GBALLOC_01_012: [When the underlying malloc call fails, gballoc_malloc shall return NULL and size should not be counted towards total memory used.] */
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| 109 | free(allocation);
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| 110 | }
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| 111 | else
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| 112 | {
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| 113 | /* Codes_SRS_GBALLOC_01_004: [If the underlying malloc call is successful, gb_malloc shall increment the total memory used with the amount indicated by size.] */
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| 114 | allocation->ptr = result;
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| 115 | allocation->size = size;
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| 116 | allocation->next = head;
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| 117 | head = allocation;
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| 118 |
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| 119 | g_allocations++;
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| 120 | totalSize += size;
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| 121 | /* Codes_SRS_GBALLOC_01_011: [The maximum total memory used shall be the maximum of the total memory used at any point.] */
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| 122 | if (maxSize < totalSize)
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| 123 | {
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| 124 | maxSize = totalSize;
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| 125 | }
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| 126 | }
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| 127 | }
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| 128 |
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| 129 | (void)Unlock(gballocThreadSafeLock);
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| 130 | }
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| 131 |
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| 132 | return result;
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| 133 | }
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| 134 |
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| 135 | void* gballoc_calloc(size_t nmemb, size_t size)
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| 136 | {
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| 137 | void* result;
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| 138 |
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| 139 | if (gballocState != GBALLOC_STATE_INIT)
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| 140 | {
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| 141 | /* Codes_SRS_GBALLOC_01_040: [If gballoc was not initialized gballoc_calloc shall simply call calloc without any memory tracking being performed.] */
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| 142 | result = calloc(nmemb, size);
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| 143 | }
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| 144 | /* Codes_SRS_GBALLOC_01_031: [gballoc_calloc shall ensure thread safety by using the lock created by gballoc_Init] */
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| 145 | else if (LOCK_OK != Lock(gballocThreadSafeLock))
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| 146 | {
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| 147 | /* Codes_SRS_GBALLOC_01_046: [If acquiring the lock fails, gballoc_calloc shall return NULL.] */
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| 148 | LogError("Failed to get the Lock.");
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| 149 | result = NULL;
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| 150 | }
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| 151 | else
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| 152 | {
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| 153 | ALLOCATION* allocation = (ALLOCATION*)calloc(1, sizeof(ALLOCATION));
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| 154 | if (allocation == NULL)
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| 155 | {
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| 156 | result = NULL;
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| 157 | }
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| 158 | else
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| 159 | {
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| 160 | /* Codes_SRS_GBALLOC_01_020: [gballoc_calloc shall call the C99 calloc function and return its result.] */
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| 161 | result = calloc(nmemb, size);
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| 162 | if (result == NULL)
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| 163 | {
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| 164 | /* Codes_SRS_GBALLOC_01_022: [When the underlying calloc call fails, gballoc_calloc shall return NULL and size should not be counted towards total memory used.] */
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| 165 | free(allocation);
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| 166 | }
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| 167 | else
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| 168 | {
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| 169 | /* Codes_SRS_GBALLOC_01_021: [If the underlying calloc call is successful, gballoc_calloc shall increment the total memory used with nmemb*size.] */
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| 170 | allocation->ptr = result;
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| 171 | allocation->size = nmemb * size;
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| 172 | allocation->next = head;
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| 173 | head = allocation;
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| 174 | g_allocations++;
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| 175 |
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| 176 | totalSize += allocation->size;
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| 177 | /* Codes_SRS_GBALLOC_01_011: [The maximum total memory used shall be the maximum of the total memory used at any point.] */
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| 178 | if (maxSize < totalSize)
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| 179 | {
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| 180 | maxSize = totalSize;
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| 181 | }
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| 182 | }
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| 183 | }
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| 184 |
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| 185 | (void)Unlock(gballocThreadSafeLock);
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| 186 | }
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| 187 |
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| 188 | return result;
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| 189 | }
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| 190 |
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| 191 | void* gballoc_realloc(void* ptr, size_t size)
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| 192 | {
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| 193 | ALLOCATION* curr;
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| 194 | void* result;
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| 195 | ALLOCATION* allocation = NULL;
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| 196 |
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| 197 | if (gballocState != GBALLOC_STATE_INIT)
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| 198 | {
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| 199 | /* Codes_SRS_GBALLOC_01_041: [If gballoc was not initialized gballoc_realloc shall shall simply call realloc without any memory tracking being performed.] */
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| 200 | result = realloc(ptr, size);
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| 201 | }
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| 202 | /* Codes_SRS_GBALLOC_01_032: [gballoc_realloc shall ensure thread safety by using the lock created by gballoc_Init.] */
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| 203 | else if (LOCK_OK != Lock(gballocThreadSafeLock))
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| 204 | {
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| 205 | /* Codes_SRS_GBALLOC_01_047: [If acquiring the lock fails, gballoc_realloc shall return NULL.] */
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| 206 | LogError("Failed to get the Lock.");
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| 207 | result = NULL;
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| 208 | }
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| 209 | else
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| 210 | {
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| 211 | if (ptr == NULL)
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| 212 | {
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| 213 | /* Codes_SRS_GBALLOC_01_017: [When ptr is NULL, gballoc_realloc shall call the underlying realloc with ptr being NULL and the realloc result shall be tracked by gballoc.] */
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| 214 | allocation = (ALLOCATION*)calloc(1, sizeof(ALLOCATION));
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| 215 | }
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| 216 | else
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| 217 | {
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| 218 | curr = head;
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| 219 | while (curr != NULL)
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| 220 | {
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| 221 | if (curr->ptr == ptr)
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| 222 | {
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| 223 | allocation = curr;
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| 224 | break;
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| 225 | }
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| 226 | else
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| 227 | {
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| 228 | curr = (ALLOCATION*)curr->next;
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| 229 | }
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| 230 | }
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| 231 | }
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| 232 |
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| 233 | if (allocation == NULL)
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| 234 | {
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| 235 | /* Codes_SRS_GBALLOC_01_015: [When allocating memory used for tracking by gballoc_realloc fails, gballoc_realloc shall return NULL and no change should be made to the counted total memory usage.] */
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| 236 | /* Codes_SRS_GBALLOC_01_016: [When the ptr pointer cannot be found in the pointers tracked by gballoc, gballoc_realloc shall return NULL and the underlying realloc shall not be called.] */
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| 237 | result = NULL;
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| 238 | }
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| 239 | else
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| 240 | {
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| 241 | result = realloc(ptr, size);
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| 242 | if (result == NULL)
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| 243 | {
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| 244 | /* Codes_SRS_GBALLOC_01_014: [When the underlying realloc call fails, gballoc_realloc shall return NULL and no change should be made to the counted total memory usage.] */
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| 245 | if (ptr == NULL)
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| 246 | {
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| 247 | free(allocation);
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| 248 | }
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| 249 | }
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| 250 | else
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| 251 | {
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| 252 | if (ptr != NULL)
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| 253 | {
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| 254 | /* Codes_SRS_GBALLOC_01_006: [If the underlying realloc call is successful, gballoc_realloc shall look up the size associated with the pointer ptr and decrease the total memory used with that size.] */
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| 255 | allocation->ptr = result;
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| 256 | totalSize -= allocation->size;
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| 257 | allocation->size = size;
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| 258 | }
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| 259 | else
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| 260 | {
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| 261 | /* add block */
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| 262 | allocation->ptr = result;
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| 263 | allocation->size = size;
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| 264 | allocation->next = head;
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| 265 | head = allocation;
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| 266 | }
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| 267 |
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| 268 | /* Codes_SRS_GBALLOC_01_007: [If realloc is successful, gballoc_realloc shall also increment the total memory used value tracked by this module.] */
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| 269 | totalSize += size;
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| 270 | g_allocations++;
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| 271 |
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| 272 | /* Codes_SRS_GBALLOC_01_011: [The maximum total memory used shall be the maximum of the total memory used at any point.] */
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| 273 | if (maxSize < totalSize)
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| 274 | {
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| 275 | maxSize = totalSize;
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| 276 | }
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| 277 | }
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| 278 | }
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| 279 |
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| 280 | (void)Unlock(gballocThreadSafeLock);
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| 281 | }
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| 282 |
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| 283 | return result;
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| 284 | }
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| 285 |
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| 286 | void gballoc_free(void* ptr)
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| 287 | {
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| 288 | ALLOCATION* curr = head;
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| 289 | ALLOCATION* prev = NULL;
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| 290 |
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| 291 | if (gballocState != GBALLOC_STATE_INIT)
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| 292 | {
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| 293 | /* Codes_SRS_GBALLOC_01_042: [If gballoc was not initialized gballoc_free shall shall simply call free.] */
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| 294 | free(ptr);
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| 295 | }
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| 296 | /* Codes_SRS_GBALLOC_01_033: [gballoc_free shall ensure thread safety by using the lock created by gballoc_Init.] */
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| 297 | else if (LOCK_OK != Lock(gballocThreadSafeLock))
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| 298 | {
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| 299 | /* Codes_SRS_GBALLOC_01_049: [If acquiring the lock fails, gballoc_free shall do nothing.] */
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| 300 | LogError("Failed to get the Lock.");
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| 301 | }
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| 302 | else
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| 303 | {
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| 304 | /* Codes_SRS_GBALLOC_01_009: [gballoc_free shall also look up the size associated with the ptr pointer and decrease the total memory used with the associated size amount.] */
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| 305 | while (curr != NULL)
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| 306 | {
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| 307 | if (curr->ptr == ptr)
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| 308 | {
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| 309 | /* Codes_SRS_GBALLOC_01_008: [gballoc_free shall call the C99 free function.] */
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| 310 | free(ptr);
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| 311 | totalSize -= curr->size;
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| 312 | if (prev != NULL)
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| 313 | {
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| 314 | prev->next = curr->next;
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| 315 | }
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| 316 | else
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| 317 | {
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| 318 | head = (ALLOCATION*)curr->next;
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| 319 | }
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| 320 |
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| 321 | free(curr);
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| 322 | break;
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| 323 | }
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| 324 |
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| 325 | prev = curr;
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| 326 | curr = (ALLOCATION*)curr->next;
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| 327 | }
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| 328 |
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| 329 | if ((curr == NULL) && (ptr != NULL))
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| 330 | {
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| 331 | /* Codes_SRS_GBALLOC_01_019: [When the ptr pointer cannot be found in the pointers tracked by gballoc, gballoc_free shall not free any memory.] */
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| 332 |
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| 333 | /* could not find the allocation */
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| 334 | LogError("Could not free allocation for address %p (not found)", ptr);
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| 335 | }
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| 336 | (void)Unlock(gballocThreadSafeLock);
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| 337 | }
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| 338 | }
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| 339 |
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| 340 | size_t gballoc_getMaximumMemoryUsed(void)
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| 341 | {
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| 342 | size_t result;
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| 343 |
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| 344 | /* Codes_SRS_GBALLOC_01_038: [If gballoc was not initialized gballoc_getMaximumMemoryUsed shall return MAX_INT_SIZE.] */
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| 345 | if (gballocState != GBALLOC_STATE_INIT)
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| 346 | {
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| 347 | LogError("gballoc is not initialized.");
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| 348 | result = SIZE_MAX;
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| 349 | }
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| 350 | /* Codes_SRS_GBALLOC_01_034: [gballoc_getMaximumMemoryUsed shall ensure thread safety by using the lock created by gballoc_Init.] */
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| 351 | else if (LOCK_OK != Lock(gballocThreadSafeLock))
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| 352 | {
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| 353 | /* Codes_SRS_GBALLOC_01_050: [If the lock cannot be acquired, gballoc_getMaximumMemoryUsed shall return SIZE_MAX.] */
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| 354 | LogError("Failed to get the Lock.");
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| 355 | result = SIZE_MAX;
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| 356 | }
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| 357 | else
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| 358 | {
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| 359 | /* Codes_SRS_GBALLOC_01_010: [gballoc_getMaximumMemoryUsed shall return the maximum amount of total memory used recorded since the module initialization.] */
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| 360 | result = maxSize;
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| 361 | (void)Unlock(gballocThreadSafeLock);
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| 362 | }
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| 363 |
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| 364 | return result;
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| 365 | }
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| 366 |
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| 367 | size_t gballoc_getCurrentMemoryUsed(void)
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| 368 | {
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| 369 | size_t result;
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| 370 |
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| 371 | /* Codes_SRS_GBALLOC_01_044: [If gballoc was not initialized gballoc_getCurrentMemoryUsed shall return SIZE_MAX.] */
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| 372 | if (gballocState != GBALLOC_STATE_INIT)
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| 373 | {
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| 374 | LogError("gballoc is not initialized.");
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| 375 | result = SIZE_MAX;
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| 376 | }
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| 377 | /* Codes_SRS_GBALLOC_01_036: [gballoc_getCurrentMemoryUsed shall ensure thread safety by using the lock created by gballoc_Init.]*/
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| 378 | else if (LOCK_OK != Lock(gballocThreadSafeLock))
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| 379 | {
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| 380 | /* Codes_SRS_GBALLOC_01_051: [If the lock cannot be acquired, gballoc_getCurrentMemoryUsed shall return SIZE_MAX.] */
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| 381 | LogError("Failed to get the Lock.");
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| 382 | result = SIZE_MAX;
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| 383 | }
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| 384 | else
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| 385 | {
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| 386 | /*Codes_SRS_GBALLOC_02_001: [gballoc_getCurrentMemoryUsed shall return the currently used memory size.] */
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| 387 | result = totalSize;
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| 388 | (void)Unlock(gballocThreadSafeLock);
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| 389 | }
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| 390 |
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| 391 | return result;
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| 392 | }
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| 393 |
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| 394 | size_t gballoc_getAllocationCount(void)
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| 395 | {
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| 396 | size_t result;
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| 397 |
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| 398 | /* Codes_SRS_GBALLOC_07_001: [ If gballoc was not initialized gballoc_getAllocationCount shall return 0. ] */
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| 399 | if (gballocState != GBALLOC_STATE_INIT)
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| 400 | {
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| 401 | LogError("gballoc is not initialized.");
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| 402 | result = 0;
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| 403 | }
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| 404 | /* Codes_SRS_GBALLOC_07_002: [ gballoc_getAllocationCount shall ensure thread safety by using the lock created by gballoc_Init ] */
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| 405 | else if (LOCK_OK != Lock(gballocThreadSafeLock))
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| 406 | {
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| 407 | /* Codes_SRS_GBALLOC_07_003: [ If the lock cannot be acquired, gballoc_getAllocationCount shall return 0. ] */
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| 408 | LogError("Failed to get the Lock.");
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| 409 | result = 0;
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| 410 | }
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| 411 | else
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| 412 | {
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| 413 | /* Codes_SRS_GBALLOC_07_004: [ gballoc_getAllocationCount shall return the currently number of allocations. ] */
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| 414 | result = g_allocations;
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| 415 | (void)Unlock(gballocThreadSafeLock);
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| 416 | }
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| 417 |
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| 418 | return result;
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| 419 | }
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| 420 |
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| 421 | void gballoc_resetMetrics()
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| 422 | {
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| 423 | /* Codes_SRS_GBALLOC_07_005: [ If gballoc was not initialized gballoc_reset Metrics shall do nothing.] */
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| 424 | if (gballocState != GBALLOC_STATE_INIT)
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| 425 | {
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| 426 | LogError("gballoc is not initialized.");
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| 427 | }
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| 428 | /* Codes_SRS_GBALLOC_07_006: [ gballoc_resetMetrics shall ensure thread safety by using the lock created by gballoc_Init ]*/
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| 429 | else if (LOCK_OK != Lock(gballocThreadSafeLock))
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| 430 | {
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| 431 | /* Codes_SRS_GBALLOC_07_007: [ If the lock cannot be acquired, gballoc_reset Metrics shall do nothing.] */
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| 432 | LogError("Failed to get the Lock.");
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| 433 | }
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| 434 | else
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| 435 | {
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| 436 | /* Codes_SRS_GBALLOC_07_008: [ gballoc_resetMetrics shall reset the total allocation size, max allocation size and number of allocation to zero. ] */
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| 437 | totalSize = 0;
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| 438 | maxSize = 0;
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| 439 | g_allocations = 0;
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| 440 | (void)Unlock(gballocThreadSafeLock);
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| 441 | }
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| 442 | }
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| 443 |
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| 444 | #endif // GB_USE_CUSTOM_HEAP
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