1 /* 2 * Copyright 2015 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 * 23 * Authors: 24 * Jason Ekstrand (jason (at) jlekstrand.net) 25 * 26 */ 27 28 #pragma once 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 typedef struct { 35 void *mem_ctx; 36 size_t size; 37 size_t alloc; 38 void *data; 39 } nir_array; 40 41 static inline void 42 nir_array_init(nir_array *arr, void *mem_ctx) 43 { 44 arr->mem_ctx = mem_ctx; 45 arr->size = 0; 46 arr->alloc = 0; 47 arr->data = NULL; 48 } 49 50 static inline void 51 nir_array_fini(nir_array *arr) 52 { 53 if (arr->mem_ctx) 54 ralloc_free(arr->data); 55 else 56 free(arr->data); 57 } 58 59 #define NIR_ARRAY_INITIAL_SIZE 64 60 61 /* Increments the size of the array by the given ammount and returns a 62 * pointer to the beginning of the newly added space. 63 */ 64 static inline void * 65 nir_array_grow(nir_array *arr, size_t additional) 66 { 67 size_t new_size = arr->size + additional; 68 if (new_size > arr->alloc) { 69 if (arr->alloc == 0) 70 arr->alloc = NIR_ARRAY_INITIAL_SIZE; 71 72 while (new_size > arr->alloc) 73 arr->alloc *= 2; 74 75 if (arr->mem_ctx) 76 arr->data = reralloc_size(arr->mem_ctx, arr->data, arr->alloc); 77 else 78 arr->data = realloc(arr->data, arr->alloc); 79 } 80 81 void *ptr = (void *)((char *)arr->data + arr->size); 82 arr->size = new_size; 83 84 return ptr; 85 } 86 87 #define nir_array_add(arr, type, elem) \ 88 *(type *)nir_array_grow(arr, sizeof(type)) = (elem) 89 90 #define nir_array_foreach(arr, type, elem) \ 91 for (type *elem = (type *)(arr)->data; \ 92 elem < (type *)((char *)(arr)->data + (arr)->size); elem++) 93 94 #ifdef __cplusplus 95 } /* extern "C" */ 96 #endif 97
