#define FIO_IO_U_QUEUE
#include <assert.h>
+#include <stddef.h>
+
+#include "lib/types.h"
struct io_u;
struct io_u_queue {
struct io_u **io_us;
unsigned int nr;
+ unsigned int max;
};
static inline struct io_u *io_u_qpop(struct io_u_queue *q)
{
- if (q->nr)
- return q->io_us[--q->nr];
+ if (q->nr) {
+ const unsigned int next = --q->nr;
+ struct io_u *io_u = q->io_us[next];
+
+ q->io_us[next] = NULL;
+ return io_u;
+ }
return NULL;
}
static inline void io_u_qpush(struct io_u_queue *q, struct io_u *io_u)
{
- q->io_us[q->nr++] = io_u;
+ if (q->nr < q->max) {
+ q->io_us[q->nr++] = io_u;
+ return;
+ }
+
+ assert(0);
}
-static inline int io_u_qempty(struct io_u_queue *q)
+static inline int io_u_qempty(const struct io_u_queue *q)
{
return !q->nr;
}
#define io_u_qiter(q, io_u, i) \
- for (i = 0, io_u = (q)->io_us[0]; i < (q)->nr; i++, io_u = (q)->io_us[i])
+ for (i = 0; i < (q)->nr && (io_u = (q)->io_us[i]); i++)
-int io_u_qinit(struct io_u_queue *q, unsigned int nr);
+bool io_u_qinit(struct io_u_queue *q, unsigned int nr);
void io_u_qexit(struct io_u_queue *q);
struct io_u_ring {
struct io_u **ring;
};
-int io_u_rinit(struct io_u_ring *ring, unsigned int nr);
+bool io_u_rinit(struct io_u_ring *ring, unsigned int nr);
void io_u_rexit(struct io_u_ring *ring);
static inline void io_u_rpush(struct io_u_ring *r, struct io_u *io_u)