io: io_always, and zero-length operations support.

[ccan] / ccan / io / backend.h

diff --git a/ccan/io/backend.h b/ccan/io/backend.h
index e65c990683669d8cae1ee67a4fa3c540201a1764..e2090ff14068ebe0a34317941bb8efc6f7cb9a0a 100644 (file)
--- 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;
@@ -47,13 +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_wakeup(struct io_conn *conn);
+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 */