diff options
Diffstat (limited to 'kit/allocator.c')
| -rw-r--r-- | kit/allocator.c | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/kit/allocator.c b/kit/allocator.c deleted file mode 100644 index 9fd7bad..0000000 --- a/kit/allocator.c +++ /dev/null @@ -1,199 +0,0 @@ -#include "allocator.h" - -#include <assert.h> -#include <string.h> - -#ifndef KIT_DISABLE_SYSTEM_MALLOC -# include <stdlib.h> -#endif - -static void *kit_allocate_default_(i32 request, i64 size, - i64 previous_size, void *pointer) { -#ifndef KIT_DISABLE_SYSTEM_MALLOC - switch (request) { - case KIT_ALLOCATE: - case KIT_ALLOCATE_ZERO: { - assert(size >= 0); - assert(previous_size == 0); - assert(pointer == NULL); - - if (size <= 0) - return NULL; - - void *p = malloc(size); - - if (p != NULL && request == KIT_ALLOCATE_ZERO) - memset(p, 0, size); - - return p; - } - - case KIT_REALLOCATE: - case KIT_REALLOCATE_ZERO: { - assert(size >= 0); - assert(previous_size != 0 || pointer == NULL); - assert(previous_size == 0 || pointer != NULL); - - if (previous_size == 0 && pointer != NULL) - return NULL; - if (previous_size != 0 && pointer == NULL) - return NULL; - if (size == previous_size) - return pointer; - - u8 *p = NULL; - - if (size > 0) { - p = (u8 *) malloc(size); - - if (p != NULL) { - if (size > 0 && previous_size > 0) - memcpy(p, pointer, - size < previous_size ? size : previous_size); - if (request == KIT_REALLOCATE_ZERO && size > previous_size) - memset(p + previous_size, 0, size - previous_size); - } - } - - free(pointer); - - return p; - } - - case KIT_DEALLOCATE: - assert(size == 0); - assert(pointer != NULL); - if (pointer != NULL) - free(pointer); - return NULL; - - case KIT_DEALLOCATE_ALL: - // Do nothing. - // - return NULL; - - default:; - } -#endif - - assert(0); - return NULL; -} - -static void *kit_allocate_from_buffer_(kit_allocator_t *alloc, - i32 request, i64 size, - i64 previous_size, - void *pointer) { - assert(alloc != NULL); - assert(pointer == NULL || pointer < alloc->data); - - if (alloc == NULL) - return NULL; - - switch (request) { - case KIT_ALLOCATE: - case KIT_ALLOCATE_ZERO: { - assert(size >= 0); - assert(previous_size == 0); - assert(pointer == NULL); - - if (size <= 0) - return NULL; - - if (alloc->size < size) - return NULL; - - void *p = alloc->data; - alloc->bytes += size; - alloc->size -= size; - - if (request == KIT_ALLOCATE_ZERO) - memset(p, 0, size); - - return p; - } - - case KIT_REALLOCATE: - case KIT_REALLOCATE_ZERO: { - assert(size >= 0); - assert(previous_size != 0 || pointer == NULL); - assert(previous_size == 0 || pointer != NULL); - - if (size <= 0) - return NULL; - if (size <= previous_size) - return pointer; - if (previous_size == 0 && pointer != NULL) - return NULL; - if (previous_size != 0 && pointer == NULL) - return NULL; - - if ((u8 *) pointer + previous_size == alloc->data) { - if (alloc->size < size - previous_size) - return NULL; - alloc->bytes += size - previous_size; - alloc->size -= size - previous_size; - return pointer; - } - - if (alloc->size < size) - return NULL; - - u8 *p = alloc->bytes; - alloc->bytes += size; - alloc->size -= size; - - if (previous_size > 0) - memcpy(p, pointer, previous_size); - if (request == KIT_REALLOCATE_ZERO) - memset(p + previous_size, 0, size - previous_size); - - return p; - } - - case KIT_DEALLOCATE: - case KIT_DEALLOCATE_ALL: return NULL; - - default:; - } - - assert(0); - return NULL; -} - -#ifndef KIT_ENABLE_CUSTOM_ALLOC_DISPATCH -void *kit_alloc_dispatch(kit_allocator_t *alloc, i32 request, - i64 size, i64 previous_size, void *pointer) { - if (alloc == NULL) - return kit_allocate_default_(request, size, previous_size, - pointer); - - switch (alloc->type) { - case KIT_ALLOC_TYPE_DEFAULT: - return kit_allocate_default_(request, size, previous_size, - pointer); - - case KIT_ALLOC_TYPE_BUFFER: - return kit_allocate_from_buffer_(alloc, request, - // alignment - ((size + 7) / 8) * 8, - previous_size, pointer); - - default:; - } - - return NULL; -} -#endif - -kit_allocator_t kit_alloc_default(void) { - return (kit_allocator_t) { .type = KIT_ALLOC_TYPE_DEFAULT, - .size = 0, - .data = NULL }; -} - -kit_allocator_t kit_alloc_buffer(i64 size, void *buffer) { - return (kit_allocator_t) { .type = KIT_ALLOC_TYPE_BUFFER, - .size = size, - .data = buffer }; -} |