SW/SWalloc.h at master · sergcpp/SW · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
#ifndefSW_ALLOC_H
#defineSW_ALLOC_H

#include<assert.h>
#include<stdint.h>

staticinlinevoid*sw_aligned_malloc(size_tsize, size_talignment) {
assert(alignment>sizeof(void*));
size_tspace=size+ (alignment-1);

void*ptr=malloc(space+sizeof(void*));
void*original_ptr=ptr;

char*ptr_bytes= (char*)ptr;
ptr_bytes+=sizeof(void*);

size_toff= (size_t)((uintptr_t)(ptr_bytes) % alignment);
if (off) {
off=alignment-off;
 }
ptr_bytes+=off;
assert(((uintptr_t)(ptr_bytes) % alignment) ==0);

ptr=ptr_bytes;
ptr_bytes-=sizeof(void*);

memcpy(ptr_bytes, &original_ptr, sizeof(void*));

returnptr;
}

staticinlinevoidsw_aligned_free(void*p) {
if (p) {
free(((void**)p)[-1]);
 }
}

#endif// SW_ALLOC_H