qemu-malloc.c

   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 {
  29     if (ptr == NULL)
  30         abort();
  31     return ptr;
  32 }
  33
  34 void *get_mmap_addr(unsigned long size)
  35 {
  36     return NULL;
  37 }
  38
  39 void qemu_free(void *ptr)
  40 {
  41     free(ptr);
  42 }
  43
  44 void *qemu_malloc(size_t size)
  45 {
  46     if (!size)
  47         abort();
  48     return oom_check(malloc(size));
  49 }
  50
  51 void *qemu_realloc(void *ptr, size_t size)
  52 {
  53     if (size)
  54         return oom_check(realloc(ptr, size));
  55     else {
  56         if (ptr)
  57             return realloc(ptr, size);
  58     }
  59     abort();
  60 }
  61
  62 void *qemu_mallocz(size_t size)
  63 {
  64     void *ptr;
  65     ptr = qemu_malloc(size);
  66     memset(ptr, 0, size);
  67     return ptr;
  68 }
  69
  70 char *qemu_strdup(const char *str)
  71 {
  72     char *ptr;
  73     size_t len = strlen(str);
  74     ptr = qemu_malloc(len + 1);
  75     memcpy(ptr, str, len + 1);
  76     return ptr;
  77 }
  78
  79 char *qemu_strndup(const char *str, size_t size)
  80 {
  81     const char *end = memchr(str, 0, size);
  82     char *new;
  83
  84     if (end)
  85         size = end - str;
  86
  87     new = qemu_malloc(size + 1);
  88     new[size] = 0;
  89
  90     return memcpy(new, str, size);
  91 }