#include <libc.h>
#include <bin.h>
typedef struct Bin Bin;
void *binalloc(Bin **bp, ulong size, int clr);
void *bingrow(Bin **bp, void *op, ulong osize,
ulong size, int clr);
void binfree(Bin **bp);
Binalloc returns a pointer to a new block of at least size bytes. The block is suitably aligned for storage of any type of object. No two active pointers from binalloc will have the same value. The call binalloc(0) returns a valid pointer rather than null. If clr is non-zero, the allocated memory is set to 0; otherwise, the contents are undefined.
Bingrow is used to extend the size of a block of memory returned by binalloc . Bp must point to the same bin group used to allocate the original block, and osize must be the last size used to allocate or grow the block. A pointer to a block of at least size bytes is returned, with the same contents in the first osize locations. If clr is non-zero, the remaining bytes are set to 0, and are undefined otherwise. If op is nil , it and osize are ignored, and the result is the same as calling binalloc .
Binalloc and bingrow allocate large chunks of memory using .MR malloc (3) and return pieces of these chunks. The chunks are free 'd upon a call to binfree .