41 lines
661 B
C
41 lines
661 B
C
|
internal Arena *
|
||
|
|
arena_initialize(u64 size)
|
||
|
|
{
|
||
|
|
Arena *result = 0;
|
||
|
|
|
||
|
|
void *backing_buffer = malloc(size);
|
||
|
|
|
||
|
|
if (backing_buffer != NULL)
|
||
|
|
{
|
||
|
|
result = (Arena*) backing_buffer;
|
||
|
|
|
||
|
|
result->buffer = backing_buffer;
|
||
|
|
result->offset = sizeof(Arena);
|
||
|
|
result->size = sizeof(Arena) + size;
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
internal void *
|
||
|
|
arena_allocate(Arena *arena, u64 size)
|
||
|
|
{
|
||
|
|
void *result = 0;
|
||
|
|
|
||
|
|
if (arena->offset + size <= arena->size)
|
||
|
|
{
|
||
|
|
result = (void*)((u64) arena->buffer + (u64) arena->offset);
|
||
|
|
arena->offset += size;
|
||
|
|
|
||
|
|
memset(result, 0, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
internal void
|
||
|
|
arena_release(Arena *arena)
|
||
|
|
{
|
||
|
|
arena->offset = 0;
|
||
|
|
}
|