1 /* Licensed under LGPLv2.1+ - see LICENSE file for details */
5 #include <sys/socket.h>
15 struct io_listener *io_new_listener_(int fd,
16 void (*init)(int fd, void *arg),
19 struct io_listener *l = malloc(sizeof(*l));
24 l->fd.listener = true;
28 if (!add_listener(l)) {
35 void io_close_listener(struct io_listener *l)
42 struct io_conn *io_new_conn_(int fd,
44 void (*finish)(struct io_conn *, void *),
47 struct io_conn *conn = malloc(sizeof(*conn));
52 conn->fd.listener = false;
55 conn->finish = finish;
56 conn->finish_arg = arg;
59 if (!add_conn(conn)) {
66 struct io_conn *io_duplex_(struct io_conn *old,
68 void (*finish)(struct io_conn *, void *),
75 conn = malloc(sizeof(*conn));
79 conn->fd.listener = false;
80 conn->fd.fd = old->fd.fd;
83 conn->finish = finish;
84 conn->finish_arg = arg;
86 if (!add_duplex(conn)) {
94 bool io_timeout_(struct io_conn *conn, struct timespec ts,
95 struct io_plan (*cb)(struct io_conn *, void *), void *arg)
98 conn->timeout = malloc(sizeof(*conn->timeout));
102 assert(!timeout_active(conn));
104 conn->timeout->next = cb;
105 conn->timeout->next_arg = arg;
106 backend_add_timeout(conn, ts);
110 static enum io_result do_write(struct io_conn *conn)
112 ssize_t ret = write(conn->fd.fd, conn->plan.u.write.buf, conn->plan.u.write.len);
116 conn->plan.u.write.buf += ret;
117 conn->plan.u.write.len -= ret;
118 if (conn->plan.u.write.len == 0)
119 return RESULT_FINISHED;
124 /* Queue some data to be written. */
125 struct io_plan io_write_(const void *data, size_t len,
126 struct io_plan (*cb)(struct io_conn *, void *),
131 plan.u.write.buf = data;
132 plan.u.write.len = len;
136 plan.pollflag = POLLOUT;
141 static enum io_result do_read(struct io_conn *conn)
143 ssize_t ret = read(conn->fd.fd, conn->plan.u.read.buf,
144 conn->plan.u.read.len);
147 conn->plan.u.read.buf += ret;
148 conn->plan.u.read.len -= ret;
149 if (conn->plan.u.read.len == 0)
150 return RESULT_FINISHED;
155 /* Queue a request to read into a buffer. */
156 struct io_plan io_read_(void *data, size_t len,
157 struct io_plan (*cb)(struct io_conn *, void *),
162 plan.u.read.buf = data;
163 plan.u.read.len = len;
167 plan.pollflag = POLLIN;
172 static enum io_result do_read_partial(struct io_conn *conn)
174 ssize_t ret = read(conn->fd.fd, conn->plan.u.readpart.buf,
175 *conn->plan.u.readpart.lenp);
178 *conn->plan.u.readpart.lenp = ret;
179 return RESULT_FINISHED;
182 /* Queue a partial request to read into a buffer. */
183 struct io_plan io_read_partial_(void *data, size_t *len,
184 struct io_plan (*cb)(struct io_conn *, void *),
189 plan.u.readpart.buf = data;
190 plan.u.readpart.lenp = len;
191 plan.io = do_read_partial;
194 plan.pollflag = POLLIN;
200 static enum io_result do_write_partial(struct io_conn *conn)
202 ssize_t ret = write(conn->fd.fd, conn->plan.u.writepart.buf,
203 *conn->plan.u.writepart.lenp);
206 *conn->plan.u.writepart.lenp = ret;
207 return RESULT_FINISHED;
210 /* Queue a partial write request. */
211 struct io_plan io_write_partial_(const void *data, size_t *len,
212 struct io_plan (*cb)(struct io_conn*, void *),
217 plan.u.writepart.buf = data;
218 plan.u.writepart.lenp = len;
219 plan.io = do_write_partial;
222 plan.pollflag = POLLOUT;
228 struct io_plan io_idle(void)
239 void io_wake(struct io_conn *conn, struct io_plan plan)
242 /* It might have finished, but we haven't called its finish() yet. */
243 if (conn->plan.state == IO_FINISHED)
245 assert(!conn->plan.io);
247 backend_wakeup(conn);
250 static struct io_plan do_next(struct io_conn *conn)
252 if (timeout_active(conn))
253 backend_del_timeout(conn);
254 return conn->plan.next(conn, conn->plan.next_arg);
257 struct io_plan do_ready(struct io_conn *conn)
259 assert(conn->plan.state == IO_IO);
260 switch (conn->plan.io(conn)) {
262 return io_close(conn, NULL);
263 case RESULT_FINISHED:
264 return do_next(conn);
272 /* Useful next functions. */
273 /* Close the connection, we're done. */
274 struct io_plan io_close(struct io_conn *conn, void *arg)
278 plan.state = IO_FINISHED;
284 /* Exit the loop, returning this (non-NULL) arg. */
285 struct io_plan io_break(void *ret, struct io_plan plan)
287 io_loop_return = ret;