#ifndef CCAN_IO_BACKEND_H
#define CCAN_IO_BACKEND_H
#include <stdbool.h>
-#include <ccan/timer/timer.h>
+#include <poll.h>
+#include "io_plan.h"
+#include <ccan/list/list.h>
struct fd {
int fd;
struct io_listener {
struct fd fd;
+ const tal_t *ctx;
+
/* These are for connections we create. */
- void (*init)(int fd, void *arg);
+ struct io_plan *(*init)(struct io_conn *conn, void *arg);
void *arg;
};
-struct io_timeout {
- struct timer timer;
- struct io_conn *conn;
+enum io_plan_status {
+ /* As before calling next function. */
+ IO_UNSET,
+ /* Normal. */
+ IO_POLLING,
+ /* Waiting for io_wake */
+ IO_WAITING,
+ /* Always do this. */
+ IO_ALWAYS,
+ /* Closing (both plans will be the same). */
+ IO_CLOSING
+};
+
+/**
+ * struct io_plan - one half of I/O to do
+ * @status: the status of this plan.
+ * @io: function to call when fd becomes read/writable, returns 0 to be
+ * called again, 1 if it's finished, and -1 on error (fd will be closed)
+ * @next: the next function which is called if io returns 1.
+ * @next_arg: the argument to @next
+ * @u1, @u2: scratch space for @io.
+ */
+struct io_plan {
+ enum io_plan_status status;
- struct io_plan (*next)(struct io_conn *, void *arg);
+ int (*io)(int fd, struct io_plan_arg *arg);
+
+ struct io_plan *(*next)(struct io_conn *, void *next_arg);
void *next_arg;
+
+ struct io_plan_arg arg;
};
/* One connection per client. */
struct io_conn {
struct fd fd;
+ bool debug;
+ /* For duplex to save. */
+ bool debug_saved;
+
+ /* always and closing lists. */
+ struct list_node always, closing;
void (*finish)(struct io_conn *, void *arg);
void *finish_arg;
- struct io_conn *duplex;
- struct io_timeout *timeout;
-
- struct io_plan plan;
+ struct io_plan plan[2];
};
-static inline bool timeout_active(const struct io_conn *conn)
-{
- return conn->timeout && conn->timeout->conn;
-}
-
extern void *io_loop_return;
-#ifdef DEBUG
-extern struct io_conn *current;
-static inline void set_current(struct io_conn *conn)
-{
- current = conn;
-}
-static inline bool doing_debug(void)
-{
- return io_debug != NULL;
-}
-#else
-static inline void set_current(struct io_conn *conn)
-{
-}
-static inline bool doing_debug(void)
-{
- return false;
-}
-#endif
-
bool add_listener(struct io_listener *l);
bool add_conn(struct io_conn *c);
bool add_duplex(struct io_conn *c);
void del_listener(struct io_listener *l);
-void backend_plan_changed(struct io_conn *conn);
-void backend_add_timeout(struct io_conn *conn, struct timespec ts);
-void backend_del_timeout(struct io_conn *conn);
+void backend_new_closing(struct io_conn *conn);
+void backend_new_always(struct io_conn *conn);
+void backend_new_plan(struct io_conn *conn);
+void remove_from_always(struct io_conn *conn);
+void backend_plan_done(struct io_conn *conn);
+
+void backend_wake(const void *wait);
+void backend_del_conn(struct io_conn *conn);
-void io_ready(struct io_conn *conn);
+void io_ready(struct io_conn *conn, int pollflags);
+void io_do_always(struct io_conn *conn);
+void io_do_wakeup(struct io_conn *conn, enum io_direction dir);
+void *do_io_loop(struct io_conn **ready);
#endif /* CCAN_IO_BACKEND_H */