#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;
bool listener;
size_t backend_info;
-
- struct io_plan *(*next)(struct io_conn *, void *arg);
- void *next_arg;
-
- void (*finish)(struct io_conn *, void *arg);
- void *finish_arg;
};
-
/* Listeners create connections. */
struct io_listener {
struct fd fd;
-};
-
-enum io_state {
- /* These wait for something to input */
- READ,
- READPART,
-
- /* These wait for room to output */
- WRITE,
- WRITEPART,
-
- NEXT, /* eg starting, woken from idle, return from io_break. */
- IDLE,
- FINISHED,
- PROCESSING /* We expect them to change this now. */
-};
-static inline enum io_state from_ioplan(struct io_plan *op)
-{
- return (enum io_state)(long)op;
-}
+ const tal_t *ctx;
-struct io_state_read {
- char *buf;
- size_t len;
+ /* These are for connections we create. */
+ struct io_plan *(*init)(struct io_conn *conn, void *arg);
+ void *arg;
};
-struct io_state_write {
- const char *buf;
- size_t len;
+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_state_readpart {
- char *buf;
- size_t *lenp;
-};
-
-struct io_state_writepart {
- const char *buf;
- size_t *lenp;
-};
-
-struct io_timeout {
- struct timer timer;
- struct io_conn *conn;
-
- struct io_plan *(*next)(struct io_conn *, void *arg);
+/**
+ * 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;
+
+ 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;
- struct io_conn *duplex;
- struct io_timeout *timeout;
+ /* always and closing lists. */
+ struct list_node always, closing;
- enum io_state state;
- union {
- struct io_state_read read;
- struct io_state_write write;
- struct io_state_readpart readpart;
- struct io_state_writepart writepart;
- } u;
-};
+ void (*finish)(struct io_conn *, void *arg);
+ void *finish_arg;
-static inline bool timeout_active(const struct io_conn *conn)
-{
- return conn->timeout && conn->timeout->conn;
-}
+ struct io_plan plan[2];
+};
extern void *io_loop_return;
bool add_conn(struct io_conn *c);
bool add_duplex(struct io_conn *c);
void del_listener(struct io_listener *l);
-void backend_set_state(struct io_conn *conn, struct io_plan *op);
-void backend_add_timeout(struct io_conn *conn, struct timespec ts);
-void backend_del_timeout(struct io_conn *conn);
-
-struct io_plan *do_ready(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, 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 */