ccan/io: rewrite.

[ccan] / ccan / io / backend.h

diff --git a/ccan/io/backend.h b/ccan/io/backend.h
index 06427eb6fa37ea53aabfb47725211e8a448756b8..44e64ab165583765cea22a5e08a374eaf5c7dfdc 100644 (file)
--- a/ccan/io/backend.h
+++ b/ccan/io/backend.h
@@ -1,82 +1,57 @@
-/* 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 <poll.h>
+#include "io_plan.h"
 
 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. */
-};
-
-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;
-};
+       const tal_t *ctx;
 
-struct io_state_readpart {
-       char *buf;
-       size_t *lenp;
-};
-
-struct io_state_writepart {
-       const char *buf;
-       size_t *lenp;
+       /* These are for connections we create. */
+       struct io_plan *(*init)(struct io_conn *conn, void *arg);
+       void *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;
+       /* always or closing list. */
+       struct io_conn *list;
+
+       void (*finish)(struct io_conn *, void *arg);
+       void *finish_arg;
+
+       struct io_plan plan[2];
 };
 
 extern void *io_loop_return;
 
 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_new_closing(struct io_conn *conn);
+void backend_new_always(struct io_conn *conn);
+void backend_new_plan(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);
 
-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, int pollflags);
+void io_do_always(struct io_conn *conn);
+void io_do_wakeup(struct io_conn *conn, struct io_plan *plan);
+void *do_io_loop(struct io_conn **ready);
 #endif /* CCAN_IO_BACKEND_H */