Annotation of qemu/qemu-malloc.c, revision 1.1.1.3

1.1       root        1: /*
                      2:  * malloc-like functions for system emulation.
                      3:  *
                      4:  * Copyright (c) 2006 Fabrice Bellard
                      5:  *
                      6:  * Permission is hereby granted, free of charge, to any person obtaining a copy
                      7:  * of this software and associated documentation files (the "Software"), to deal
                      8:  * in the Software without restriction, including without limitation the rights
                      9:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
                     10:  * copies of the Software, and to permit persons to whom the Software is
                     11:  * furnished to do so, subject to the following conditions:
                     12:  *
                     13:  * The above copyright notice and this permission notice shall be included in
                     14:  * all copies or substantial portions of the Software.
                     15:  *
                     16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
                     17:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
                     18:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
                     19:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
                     20:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
                     21:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
                     22:  * THE SOFTWARE.
                     23:  */
                     24: #include "qemu-common.h"
                     25: #include <stdlib.h>
                     26: 
                     27: static void *oom_check(void *ptr)
                     28: {
1.1.1.2   root       29:     if (ptr == NULL) {
1.1       root       30:         abort();
1.1.1.2   root       31:     }
1.1       root       32:     return ptr;
                     33: }
                     34: 
                     35: void *get_mmap_addr(unsigned long size)
                     36: {
                     37:     return NULL;
                     38: }
                     39: 
                     40: void qemu_free(void *ptr)
                     41: {
                     42:     free(ptr);
                     43: }
                     44: 
1.1.1.3 ! root       45: static int allow_zero_malloc(void)
        !            46: {
        !            47: #if defined(CONFIG_ZERO_MALLOC)
        !            48:     return 1;
        !            49: #else
        !            50:     return 0;
        !            51: #endif
        !            52: }
        !            53: 
1.1       root       54: void *qemu_malloc(size_t size)
                     55: {
1.1.1.3 ! root       56:     if (!size && !allow_zero_malloc()) {
1.1.1.2   root       57:         abort();
                     58:     }
1.1.1.3 ! root       59:     return oom_check(malloc(size ? size : 1));
1.1       root       60: }
                     61: 
                     62: void *qemu_realloc(void *ptr, size_t size)
                     63: {
1.1.1.2   root       64:     if (size) {
1.1       root       65:         return oom_check(realloc(ptr, size));
1.1.1.3 ! root       66:     } else if (allow_zero_malloc()) {
        !            67:         return oom_check(realloc(ptr, size ? size : 1));
1.1.1.2   root       68:     }
                     69:     abort();
1.1       root       70: }
                     71: 
                     72: void *qemu_mallocz(size_t size)
                     73: {
                     74:     void *ptr;
                     75:     ptr = qemu_malloc(size);
                     76:     memset(ptr, 0, size);
                     77:     return ptr;
                     78: }
                     79: 
                     80: char *qemu_strdup(const char *str)
                     81: {
                     82:     char *ptr;
                     83:     size_t len = strlen(str);
                     84:     ptr = qemu_malloc(len + 1);
                     85:     memcpy(ptr, str, len + 1);
                     86:     return ptr;
                     87: }
                     88: 
                     89: char *qemu_strndup(const char *str, size_t size)
                     90: {
                     91:     const char *end = memchr(str, 0, size);
                     92:     char *new;
                     93: 
1.1.1.2   root       94:     if (end) {
1.1       root       95:         size = end - str;
1.1.1.2   root       96:     }
1.1       root       97: 
                     98:     new = qemu_malloc(size + 1);
                     99:     new[size] = 0;
                    100: 
                    101:     return memcpy(new, str, size);
                    102: }

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