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#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
/**
* Simple bump allocator that can be used for
* allocations with a frame lifetime.
*/
struct frame_allocator {
uint8_t *buf;
size_t offset;
size_t capacity;
};
/**
* Create a new frame allocator
*
* @param capacity The capacity in bytes of the frame allocator
* @returns The frame allocator
*/
struct frame_allocator frame_allocator_create(size_t capacity);
/**
* Destroy a frame allocator.
*
* @param alloc The @ref frame_allocator "frame allocator" to destroy.
*/
void frame_allocator_destroy(struct frame_allocator *alloc);
/**
* Allocate memory in this @ref frame_allocator "frame allocator"
*
* @param alloc The allocator to allocate in
* @param sz The size in bytes to allocate.
* @returns void* representing the start of the allocated region on success,
* NULL on failure.
*/
void *frame_allocator_alloc(struct frame_allocator *alloc, size_t sz);
/**
* Clear this @ref frame_allocator "frame allocator".
*
* This does not free any memory, but simply resets the offset to 0.
* @param alloc The frame allocator to clear
*/
void frame_allocator_clear(struct frame_allocator *alloc);
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