int
ringbuffer_collect(struct ringbuffer * rb) {
int id = _last_id(rb);
struct ringbuffer_block *blk = block_ptr(rb, 0);
do {
if (blk->length >= sizeof(struct ringbuffer_block) && blk->id == id) {
blk->id = -1;
}
blk = block_next(rb, blk);
} while(blk);
return id;
}
/** @fn int ringbuffer_collect(RINGBUFFER * rb)
* @brief 收集最早分配的还在使用的同一id的数据块以便覆盖
* @param rb 环形缓冲区指针
* @return 返回该数据块id
*/
int ringbuffer_collect(RINGBUFFER * rb)
{
int id = _last_id(rb);
RBUF_BLOCK *blk = block_ptr(rb, 0);
do
{
if (blk->length >= sizeof(RBUF_BLOCK) && blk->id == id)
{
blk->id = -1;
}
blk = block_next(rb, blk);
} while(blk);
return id;
}
