-/* Licensed under BSD-MIT - see LICENSE file for details */
+/* Licensed under LGPLv2.1+ - see LICENSE file for details */
#ifndef CCAN_IO_BACKEND_H
#define CCAN_IO_BACKEND_H
#include <stdbool.h>
+#include <ccan/timer/timer.h>
+#include <poll.h>
+
+/* A setting for actions to always run (eg. zero-length reads). */
+#define POLLALWAYS (((POLLIN|POLLOUT) + 1) & ~((POLLIN|POLLOUT)))
+
+struct io_alloc {
+ void *(*alloc)(size_t size);
+ void *(*realloc)(void *ptr, size_t size);
+ void (*free)(void *ptr);
+};
+extern struct io_alloc io_alloc;
struct fd {
int fd;
bool listener;
size_t backend_info;
-
- struct io_op *(*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 {
- NEXT, /* eg starting, woken from idle, return from io_break. */
- READ,
- WRITE,
- READPART,
- WRITEPART,
- IDLE,
- FINISHED,
- PROCESSING /* We expect them to change this now. */
+ /* These are for connections we create. */
+ void (*init)(int fd, void *arg);
+ void *arg;
};
-static inline enum io_state from_ioop(struct io_op *op)
-{
- return (enum io_state)(long)op;
-}
-
-struct io_state_read {
- char *buf;
- size_t len;
-};
-
-struct io_state_write {
- const char *buf;
- size_t len;
-};
-
-struct io_state_readpart {
- char *buf;
- size_t *lenp;
-};
+struct io_timeout {
+ struct timer timer;
+ struct io_conn *conn;
-struct io_state_writepart {
- const char *buf;
- size_t *lenp;
+ struct io_plan (*next)(struct io_conn *, void *arg);
+ void *next_arg;
};
/* One connection per client. */
struct io_conn {
struct fd fd;
- 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;
+
+ struct io_conn *duplex;
+ struct io_timeout *timeout;
+
+ struct io_plan plan;
};
+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_on(struct io_conn *conn)
+{
+ return io_debug_conn && io_debug_conn(conn);
+}
+static inline bool doing_debug(void)
+{
+ return io_debug_conn;
+}
+#else
+static inline void set_current(struct io_conn *conn)
+{
+}
+static inline bool doing_debug_on(struct io_conn *conn)
+{
+ return false;
+}
+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_set_state(struct io_conn *conn, struct io_op *op);
+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_del_conn(struct io_conn *conn);
-struct io_op *do_writeable(struct io_conn *conn);
-struct io_op *do_readable(struct io_conn *conn);
+void io_ready(struct io_conn *conn);
+void *do_io_loop(struct io_conn **ready);
#endif /* CCAN_IO_BACKEND_H */