1 // SPDX-License-Identifier: GPL-2.0+
3 * Handles a buffer that can be allocated and freed
5 * Copyright 2021 Google LLC
6 * Written by Simon Glass <sjg@chromium.org>
18 void abuf_set(struct abuf *abuf, void *data, size_t size)
26 void abuf_map_sysmem(struct abuf *abuf, ulong addr, size_t size)
28 abuf_set(abuf, map_sysmem(addr, size), size);
31 /* copied from lib/string.c for convenience */
32 static char *memdup(const void *src, size_t len)
46 bool abuf_realloc(struct abuf *abuf, size_t new_size)
51 /* easy case, just need to uninit, freeing any allocation */
54 } else if (abuf->alloced) {
55 /* currently allocated, so need to reallocate */
56 ptr = realloc(abuf->data, new_size);
60 abuf->size = new_size;
62 } else if (new_size <= abuf->size) {
64 * not currently alloced and new size is no larger. Just update
65 * it. Data is lost off the end if new_size < abuf->size
67 abuf->size = new_size;
70 /* not currently allocated and new size is larger. Alloc and
71 * copy in data. The new space is not inited.
73 ptr = malloc(new_size);
77 memcpy(ptr, abuf->data, abuf->size);
79 abuf->size = new_size;
85 void *abuf_uninit_move(struct abuf *abuf, size_t *sizep)
96 ptr = memdup(abuf->data, abuf->size);
100 /* Clear everything out so there is no record of the data */
106 void abuf_init_set(struct abuf *abuf, void *data, size_t size)
109 abuf_set(abuf, data, size);
112 void abuf_init_move(struct abuf *abuf, void *data, size_t size)
114 abuf_init_set(abuf, data, size);
115 abuf->alloced = true;
118 void abuf_uninit(struct abuf *abuf)
125 void abuf_init(struct abuf *abuf)
129 abuf->alloced = false;