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comparison cos/kernel/malloc.c @ 26:dcce92b1efbc

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Added mm.c
author windel
date Tue, 27 Dec 2011 17:36:52 +0100
parents d3c4bf3720a3
children 47b7df514243
comparison
equal deleted inserted replaced
25:d3c4bf3720a3 26:dcce92b1efbc
20 static heap_t* kernel_heap = (heap_t*) 0x400000; // 4 MB - 6 MB is heap 20 static heap_t* kernel_heap = (heap_t*) 0x400000; // 4 MB - 6 MB is heap
21 /* Allocates 'size' bytes and returns the pointer if succesfull. 21 /* Allocates 'size' bytes and returns the pointer if succesfull.
22 Kernelpanic in case of failure.. 22 Kernelpanic in case of failure..
23 */ 23 */
24 24
25 void* kmalloc(uint64_t size) { 25 void* kmalloc(uint64_t size)
26 // printf("Malloc %d bytes\n", size); 26 {
27
28 // Start at the beginning of our heap and search a free block: 27 // Start at the beginning of our heap and search a free block:
29 heap_t *current = kernel_heap; 28 heap_t *current = kernel_heap;
30 while (current->magic == HEAP_MAGIC) 29 while (current->magic == HEAP_MAGIC)
31 { 30 {
32 if ((current->state == HEAP_FREE) && (current->size >= size)) 31 if ((current->state == HEAP_FREE) && (current->size >= size))
61 current = (heap_t*)(((char*) current) + current->size + sizeof(heap_t)); 60 current = (heap_t*)(((char*) current) + current->size + sizeof(heap_t));
62 } 61 }
63 return 0x0; 62 return 0x0;
64 } 63 }
65 64
66 void kfree(void* ptr) { 65 void kfree(void* ptr)
66 {
67 printf("Free address %x\n", ptr); 67 printf("Free address %x\n", ptr);
68 } 68 }
69 69
70 void init_heap(void) 70 void init_heap(void)
71 { 71 {