X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fio%2Fbackend.h;h=e2090ff14068ebe0a34317941bb8efc6f7cb9a0a;hp=86db8c3d1de44983e3061bb33699a7783d69c88d;hb=12ab811533406e22b78ce8b227474f1056375ae4;hpb=bfb80c566ab695b70a404a419f4b1450a2fcf27a

diff --git a/ccan/io/backend.h b/ccan/io/backend.h
index 86db8c3d..e2090ff1 100644
--- a/ccan/io/backend.h
+++ b/ccan/io/backend.h
@@ -3,6 +3,17 @@
 #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;
@@ -10,61 +21,20 @@ struct fd {
 	size_t backend_info;
 };
 
-
 /* Listeners create connections. */
 struct io_listener {
 	struct fd fd;
 
 	/* These are for connections we create. */
-	struct io_plan *(*next)(struct io_conn *, void *arg);
-	void (*finish)(struct io_conn *, void *arg);
-	void *conn_arg;
-};
-
-enum io_result {
-	RESULT_AGAIN,
-	RESULT_FINISHED,
-	RESULT_CLOSE
-};
-
-enum io_state {
-	IO,
-	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;
-}
-
-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_state_writepart {
-	const char *buf;
-	size_t *lenp;
+	void (*init)(int fd, void *arg);
+	void *arg;
 };
 
 struct io_timeout {
 	struct timer timer;
 	struct io_conn *conn;
 
-	struct io_plan *(*next)(struct io_conn *, void *arg);
+	struct io_plan (*next)(struct io_conn *, void *arg);
 	void *next_arg;
 };
 
@@ -72,25 +42,13 @@ struct io_timeout {
 struct io_conn {
 	struct fd fd;
 
-	struct io_plan *(*next)(struct io_conn *, void *arg);
-	void *next_arg;
-
 	void (*finish)(struct io_conn *, void *arg);
 	void *finish_arg;
 
 	struct io_conn *duplex;
 	struct io_timeout *timeout;
 
-	enum io_result (*io)(struct io_conn *conn);
-
-	int pollflag; /* 0, POLLIN or POLLOUT */
-	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;
+	struct io_plan plan;
 };
 
 static inline bool timeout_active(const struct io_conn *conn)
@@ -100,13 +58,43 @@ static inline bool timeout_active(const struct io_conn *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_plan *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_plan *do_ready(struct io_conn *conn);
+void io_ready(struct io_conn *conn);
+void *do_io_loop(struct io_conn **ready);
 #endif /* CCAN_IO_BACKEND_H */