4coder/4ed_memory_bank.cpp

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2019-02-08 10:03:48 +00:00
/*
* Mr. 4th Dimention - Allen Webster
*
* 07.02.2019
*
* Memory bank wrapper for heap
*
*/
// TOP
internal void
memory_bank_init(Memory_Bank *mem_bank){
heap_init(&mem_bank->heap);
mem_bank->first = 0;
mem_bank->last = 0;
mem_bank->total_memory_size = 0;
}
internal void*
memory_bank_allocate(Heap *heap, Memory_Bank *mem_bank, i32 size){
void *ptr = heap_allocate(&mem_bank->heap, size);
if (ptr == 0){
i32 alloc_size = clamp_bottom(4096, size*4 + sizeof(Memory_Header));
void *new_block = heap_allocate(heap, alloc_size);
if (new_block != 0){
Memory_Header *header = (Memory_Header*)new_block;
sll_push(mem_bank->first, mem_bank->last, header);
mem_bank->total_memory_size += alloc_size;
heap_extend(&mem_bank->heap, header + 1, alloc_size - sizeof(*header));
ptr = heap_allocate(&mem_bank->heap, size);
}
}
return(ptr);
}
internal void
memory_bank_free(Memory_Bank *mem_bank, void *ptr){
heap_free(&mem_bank->heap, ptr);
}
internal void
memory_bank_free_all(Heap *heap, Memory_Bank *mem_bank){
for (Memory_Header *header = mem_bank->first, *next = 0;
header != 0;
header = next){
next = header->next;
heap_free(heap, header);
}
mem_bank->total_memory_size = 0;
}
// BOTTOM