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 struct io_plan *(*start)(struct io_conn *,
18 void (*finish)(struct io_conn *, void *),
21 struct io_listener *l = malloc(sizeof(*l));
26 l->fd.listener = true;
31 if (!add_listener(l)) {
38 void io_close_listener(struct io_listener *l)
45 struct io_conn *io_new_conn_(int fd,
46 struct io_plan *(*start)(struct io_conn *, void *),
47 void (*finish)(struct io_conn *, void *),
50 struct io_conn *conn = malloc(sizeof(*conn));
55 conn->fd.listener = false;
58 conn->finish = finish;
59 conn->finish_arg = conn->next_arg = arg;
64 if (!add_conn(conn)) {
71 struct io_conn *io_duplex_(struct io_conn *old,
72 struct io_plan *(*start)(struct io_conn *, void *),
73 void (*finish)(struct io_conn *, void *),
80 conn = malloc(sizeof(*conn));
84 conn->fd.listener = false;
85 conn->fd.fd = old->fd.fd;
87 conn->finish = finish;
88 conn->finish_arg = conn->next_arg = arg;
93 if (!add_duplex(conn)) {
101 static inline struct io_plan *to_ioplan(enum io_state state)
103 return (struct io_plan *)(long)state;
106 bool io_timeout_(struct io_conn *conn, struct timespec ts,
107 struct io_plan *(*cb)(struct io_conn *, void *), void *arg)
109 if (!conn->timeout) {
110 conn->timeout = malloc(sizeof(*conn->timeout));
114 assert(!timeout_active(conn));
116 conn->timeout->next = cb;
117 conn->timeout->next_arg = arg;
118 backend_add_timeout(conn, ts);
122 /* Queue some data to be written. */
123 struct io_plan *io_write_(struct io_conn *conn, const void *data, size_t len,
124 struct io_plan *(*cb)(struct io_conn *, void *),
127 conn->u.write.buf = data;
128 conn->u.write.len = len;
130 conn->next_arg = arg;
131 conn->pollflag = POLLOUT;
132 return to_ioplan(WRITE);
135 /* Queue a request to read into a buffer. */
136 struct io_plan *io_read_(struct io_conn *conn, void *data, size_t len,
137 struct io_plan *(*cb)(struct io_conn *, void *),
140 conn->u.read.buf = data;
141 conn->u.read.len = len;
143 conn->next_arg = arg;
144 conn->pollflag = POLLIN;
145 return to_ioplan(READ);
148 /* Queue a partial request to read into a buffer. */
149 struct io_plan *io_read_partial_(struct io_conn *conn, void *data, size_t *len,
150 struct io_plan *(*cb)(struct io_conn *, void *),
153 conn->u.readpart.buf = data;
154 conn->u.readpart.lenp = len;
156 conn->next_arg = arg;
157 conn->pollflag = POLLIN;
158 return to_ioplan(READPART);
161 /* Queue a partial write request. */
162 struct io_plan *io_write_partial_(struct io_conn *conn,
163 const void *data, size_t *len,
164 struct io_plan *(*cb)(struct io_conn*, void *),
167 conn->u.writepart.buf = data;
168 conn->u.writepart.lenp = len;
170 conn->next_arg = arg;
171 conn->pollflag = POLLOUT;
172 return to_ioplan(WRITEPART);
175 struct io_plan *io_idle(struct io_conn *conn)
178 return to_ioplan(IDLE);
181 void io_wake_(struct io_conn *conn,
182 struct io_plan *(*fn)(struct io_conn *, void *), void *arg)
185 /* It might have finished, but we haven't called its finish() yet. */
186 if (conn->state == FINISHED)
188 assert(conn->state == IDLE);
190 conn->next_arg = arg;
191 backend_set_state(conn, to_ioplan(NEXT));
194 static struct io_plan *do_next(struct io_conn *conn)
196 if (timeout_active(conn))
197 backend_del_timeout(conn);
198 return conn->next(conn, conn->next_arg);
201 struct io_plan *do_ready(struct io_conn *conn)
206 switch (conn->state) {
208 ret = write(conn->fd.fd, conn->u.write.buf, conn->u.write.len);
210 return io_close(conn, NULL);
211 conn->u.write.buf += ret;
212 conn->u.write.len -= ret;
213 finished = (conn->u.write.len == 0);
216 ret = write(conn->fd.fd, conn->u.writepart.buf,
217 *conn->u.writepart.lenp);
219 return io_close(conn, NULL);
220 *conn->u.writepart.lenp = ret;
224 ret = read(conn->fd.fd, conn->u.read.buf, conn->u.read.len);
226 return io_close(conn, NULL);
227 conn->u.read.buf += ret;
228 conn->u.read.len -= ret;
229 finished = (conn->u.read.len == 0);
232 ret = read(conn->fd.fd, conn->u.readpart.buf,
233 *conn->u.readpart.lenp);
235 return io_close(conn, NULL);
236 *conn->u.readpart.lenp = ret;
240 /* Shouldn't happen. */
245 return do_next(conn);
246 return to_ioplan(conn->state);
249 /* Useful next functions. */
250 /* Close the connection, we're done. */
251 struct io_plan *io_close(struct io_conn *conn, void *arg)
253 return to_ioplan(FINISHED);
256 /* Exit the loop, returning this (non-NULL) arg. */
257 struct io_plan *io_break_(struct io_conn *conn, void *ret,
258 struct io_plan *(*fn)(struct io_conn *, void *),
261 io_loop_return = ret;
263 conn->next_arg = arg;
265 return to_ioplan(NEXT);