ccan/io: add io_conn_exclusive and io_conn_out_exclusive.

[ccan] / ccan / io / test / run-48-exclusive-duplex-write.c

diff --git a/ccan/io/test/run-48-exclusive-duplex-write.c b/ccan/io/test/run-48-exclusive-duplex-write.c
new file mode 100644 (file)
index 0000000..897f83f
--- /dev/null
+++ b/ccan/io/test/run-48-exclusive-duplex-write.c
@@ -0,0 +1,144 @@
+#include <ccan/io/io.h>
+/* Include the C files directly. */
+#include <ccan/io/poll.c>
+#include <ccan/io/io.c>
+#include <ccan/tap/tap.h>
+#include <sys/wait.h>
+#include <stdio.h>
+
+#define PORT "65048"
+
+struct data {
+       struct io_listener *l;
+       char *pattern;
+       char buf[30];
+       size_t buflen;
+};
+
+static struct io_plan *read_more(struct io_conn *conn, struct data *d);
+static struct io_plan *write_more(struct io_conn *conn, struct data *d);
+
+static struct io_plan *read_done(struct io_conn *conn, struct data *d)
+{
+       tal_resize(&d->pattern, tal_count(d->pattern) + 1 + strlen(d->buf));
+       strcat(d->pattern, "<");
+       strcat(d->pattern, d->buf);
+       return read_more(conn, d);
+}
+
+static struct io_plan *read_more(struct io_conn *conn, struct data *d)
+{
+       memset(d->buf, 0, sizeof(d->buf));
+       return io_read_partial(conn, d->buf, sizeof(d->buf), &d->buflen,
+                              read_done, d);
+}
+
+static struct io_plan *write_done(struct io_conn *conn, struct data *d)
+{
+       tal_resize(&d->pattern, tal_count(d->pattern) + 1);
+       strcat(d->pattern, ">");
+       return write_more(conn, d);
+}
+
+static struct io_plan *write_more(struct io_conn *conn, struct data *d)
+{
+       return io_write_partial(conn, d->buf, 1, &d->buflen,
+                               write_done, d);
+}
+
+static struct io_plan *write_priority_init(struct io_conn *conn, struct data *d)
+{
+       /* This should suppress the read */
+       ok1(io_conn_out_exclusive(conn, true));
+       return write_more(conn, d);
+}
+
+static struct io_plan *init_conn(struct io_conn *conn, struct data *d)
+{
+       /* Free listener so when conns close we exit io_loop */
+       io_close_listener(d->l);
+
+       return io_duplex(conn, read_more(conn, d), write_priority_init(conn, d));
+}
+
+
+static int make_listen_fd(const char *port, struct addrinfo **info)
+{
+       int fd, on = 1;
+       struct addrinfo *addrinfo, hints;
+
+       memset(&hints, 0, sizeof(hints));
+       hints.ai_family = AF_UNSPEC;
+       hints.ai_socktype = SOCK_STREAM;
+       hints.ai_flags = AI_PASSIVE;
+       hints.ai_protocol = 0;
+
+       if (getaddrinfo(NULL, port, &hints, &addrinfo) != 0)
+               return -1;
+
+       fd = socket(addrinfo->ai_family, addrinfo->ai_socktype,
+                   addrinfo->ai_protocol);
+       if (fd < 0)
+               return -1;
+
+       setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+       if (bind(fd, addrinfo->ai_addr, addrinfo->ai_addrlen) != 0) {
+               close(fd);
+               return -1;
+       }
+       if (listen(fd, 1) != 0) {
+               close(fd);
+               return -1;
+       }
+       *info = addrinfo;
+       return fd;
+}
+
+int main(void)
+{
+       struct addrinfo *addrinfo = NULL;
+       int fd, status;
+       struct data d;
+
+       /* This is how many tests you plan to run */
+       plan_tests(8);
+       fd = make_listen_fd(PORT, &addrinfo);
+       ok1(fd >= 0);
+       d.l = io_new_listener(NULL, fd, init_conn, &d);
+       ok1(d.l);
+       fflush(stdout);
+
+       if (!fork()) {
+               io_close_listener(d.l);
+               fd = socket(addrinfo->ai_family, addrinfo->ai_socktype,
+                           addrinfo->ai_protocol);
+               if (fd < 0)
+                       exit(1);
+               if (connect(fd, addrinfo->ai_addr, addrinfo->ai_addrlen) != 0)
+                       exit(2);
+               signal(SIGPIPE, SIG_IGN);
+
+               if (write(fd, "1hellothere", strlen("1hellothere")) != strlen("1hellothere"))
+                       exit(3);
+               sleep(1);
+               if (write(fd, "1helloagain", strlen("1helloagain")) != strlen("1helloagain"))
+                       exit(4);
+               close(fd);
+               freeaddrinfo(addrinfo);
+               exit(0);
+       }
+       freeaddrinfo(addrinfo);
+
+       d.pattern = tal_arrz(NULL, char, 1);
+       ok1(io_loop(NULL, NULL) == NULL);
+       /* No trace of reads */
+       ok1(strspn(d.pattern, ">") == strlen(d.pattern));
+       tal_free(d.pattern);
+
+       ok1(wait(&status));
+       ok1(WIFEXITED(status));
+       ok1(WEXITSTATUS(status) == 0);
+
+       /* This exits depending on whether all tests passed */
+       return exit_status();
+}