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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
#include <kmalloc.h>
#include <slab_alloc.h>
#include <mutex.h>
#include <frame.h>
#include <paging.h>
#include <region.h>
static void* page_alloc_fun_for_kmalloc(size_t bytes) {
void* addr = region_alloc(bytes, "Core kernel heap", default_allocator_pf_handler);
return addr;
}
static slab_type_t slab_sizes[] = {
{ "8B kmalloc objects", 8, 2 },
{ "16B kmalloc objects", 16, 2 },
{ "32B kmalloc objects", 32, 2 },
{ "64B kmalloc objects", 64, 4 },
{ "128B kmalloc objects", 128, 4 },
{ "256B kmalloc objects", 256, 4 },
{ "512B kmalloc objects", 512, 8 },
{ "1KB kmalloc objects", 1024, 8 },
{ "2KB kmalloc objects", 2048, 16 },
{ "4KB kmalloc objects", 4096, 16 },
{ 0, 0, 0 }
};
static mem_allocator_t *kernel_allocator = 0;
STATIC_MUTEX(malloc_mutex);
void kmalloc_setup() {
kernel_allocator =
create_slab_allocator(slab_sizes, page_alloc_fun_for_kmalloc,
region_free_unmap_free);
}
void* malloc(size_t sz) {
void* res = 0;
mutex_lock(&malloc_mutex);
res = slab_alloc(kernel_allocator, sz);
mutex_unlock(&malloc_mutex);
return res;
}
void free(void* ptr) {
mutex_lock(&malloc_mutex);
slab_free(kernel_allocator, ptr);
mutex_unlock(&malloc_mutex);
}
|
