#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;
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_IO,
- IO_NEXT, /* eg starting, woken from idle, return from io_break. */
- IO_IDLE,
- IO_FINISHED
-};
-
-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;
};
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)
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 */