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1 | /* zmalloc - total amount of allocated memory aware version of malloc() | |
2 | * | |
3 | * Copyright (c) 2006-2009, Salvatore Sanfilippo <antirez at gmail dot com> | |
4 | * All rights reserved. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions are met: | |
8 | * | |
9 | * * Redistributions of source code must retain the above copyright notice, | |
10 | * this list of conditions and the following disclaimer. | |
11 | * * Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in the | |
13 | * documentation and/or other materials provided with the distribution. | |
14 | * * Neither the name of Redis nor the names of its contributors may be used | |
15 | * to endorse or promote products derived from this software without | |
16 | * specific prior written permission. | |
17 | * | |
18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
28 | * POSSIBILITY OF SUCH DAMAGE. | |
29 | */ | |
30 | ||
31 | #include <stdio.h> | |
32 | #include <stdlib.h> | |
33 | #include <string.h> | |
34 | #include "config.h" | |
35 | ||
36 | #if defined(__sun) | |
37 | #define PREFIX_SIZE sizeof(long long) | |
38 | #else | |
39 | #define PREFIX_SIZE sizeof(size_t) | |
40 | #endif | |
41 | ||
42 | static size_t used_memory = 0; | |
43 | ||
44 | static void zmalloc_oom(size_t size) { | |
45 | fprintf(stderr, "zmalloc: Out of memory trying to allocate %lu bytes\n", | |
46 | size); | |
47 | fflush(stderr); | |
48 | abort(); | |
49 | } | |
50 | ||
51 | void *zmalloc(size_t size) { | |
52 | void *ptr = malloc(size+PREFIX_SIZE); | |
53 | ||
54 | if (!ptr) zmalloc_oom(size); | |
55 | #ifdef HAVE_MALLOC_SIZE | |
56 | used_memory += redis_malloc_size(ptr); | |
57 | return ptr; | |
58 | #else | |
59 | *((size_t*)ptr) = size; | |
60 | used_memory += size+PREFIX_SIZE; | |
61 | return (char*)ptr+PREFIX_SIZE; | |
62 | #endif | |
63 | } | |
64 | ||
65 | void *zrealloc(void *ptr, size_t size) { | |
66 | #ifndef HAVE_MALLOC_SIZE | |
67 | void *realptr; | |
68 | #endif | |
69 | size_t oldsize; | |
70 | void *newptr; | |
71 | ||
72 | if (ptr == NULL) return zmalloc(size); | |
73 | #ifdef HAVE_MALLOC_SIZE | |
74 | oldsize = redis_malloc_size(ptr); | |
75 | newptr = realloc(ptr,size); | |
76 | if (!newptr) zmalloc_oom(size); | |
77 | ||
78 | used_memory -= oldsize; | |
79 | used_memory += redis_malloc_size(newptr); | |
80 | return newptr; | |
81 | #else | |
82 | realptr = (char*)ptr-PREFIX_SIZE; | |
83 | oldsize = *((size_t*)realptr); | |
84 | newptr = realloc(realptr,size+PREFIX_SIZE); | |
85 | if (!newptr) zmalloc_oom(size); | |
86 | ||
87 | *((size_t*)newptr) = size; | |
88 | used_memory -= oldsize; | |
89 | used_memory += size; | |
90 | return (char*)newptr+PREFIX_SIZE; | |
91 | #endif | |
92 | } | |
93 | ||
94 | void zfree(void *ptr) { | |
95 | #ifndef HAVE_MALLOC_SIZE | |
96 | void *realptr; | |
97 | size_t oldsize; | |
98 | #endif | |
99 | ||
100 | if (ptr == NULL) return; | |
101 | #ifdef HAVE_MALLOC_SIZE | |
102 | used_memory -= redis_malloc_size(ptr); | |
103 | free(ptr); | |
104 | #else | |
105 | realptr = (char*)ptr-PREFIX_SIZE; | |
106 | oldsize = *((size_t*)realptr); | |
107 | used_memory -= oldsize+PREFIX_SIZE; | |
108 | free(realptr); | |
109 | #endif | |
110 | } | |
111 | ||
112 | char *zstrdup(const char *s) { | |
113 | size_t l = strlen(s)+1; | |
114 | char *p = zmalloc(l); | |
115 | ||
116 | memcpy(p,s,l); | |
117 | return p; | |
118 | } | |
119 | ||
120 | size_t zmalloc_used_memory(void) { | |
121 | return used_memory; | |
122 | } |