#include "jl_ringbuf.h"

struct RingBuffer {
    int size;
    jack_ringbuffer_t *buf;
};

RingBuffer *jlrb_new(int size)
{
    RingBuffer *rb = jl_malloc_exit(sizeof(RingBuffer));
    rb->size = size;
    // It appears that we need to add one extra byte to the allocation
    // in order to get the capacity we desire -jdl 2015-08-29.
    rb->buf = jack_ringbuffer_create(sizeof(void *) * size + 1);
    return rb;
}

void jlrb_free(RingBuffer ** rb)
{
    jack_ringbuffer_free((*rb)->buf);
    jl_free(*rb);
    *rb = NULL;
}

int jlrb_size(RingBuffer * rb)
{
    return rb->size;
}

inline int jlrb_count(RingBuffer * rb)
{
    return jack_ringbuffer_read_space(rb->buf) / sizeof(void *);
}

inline bool jlrb_put(RingBuffer * rb, void *data)
{
    int writeSpace = jack_ringbuffer_write_space(rb->buf);
    if (writeSpace < sizeof(void *)) {
        return false;
    }
    jack_ringbuffer_write(rb->buf, (char *)(&data), sizeof(void *));
    return true;
}

inline void *jlrb_get(RingBuffer * rb)
{
    if (jlrb_count(rb) == 0) {
        return NULL;
    }
    void *data;
    jack_ringbuffer_read(rb->buf, (char *)(&data), sizeof(void *));
    return data;
}