X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fio%2Ftest%2Frun-10-many.c;fp=ccan%2Fio%2Ftest%2Frun-10-many.c;h=6a972ba82da10ef8900c6f3f8bc3ea17b49a7061;hp=0000000000000000000000000000000000000000;hb=0a2fd289c7bf57d9fc35ad6af36df4bcc694f361;hpb=a87884aabba198a1d44e22f89c5477f1b8167ffd

diff --git a/ccan/io/test/run-10-many.c b/ccan/io/test/run-10-many.c
new file mode 100644
index 00000000..6a972ba8
--- /dev/null
+++ b/ccan/io/test/run-10-many.c
@@ -0,0 +1,122 @@
+#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 NUM 100
+#define NUM_ITERS 1000
+
+struct buffer {
+	int iters;
+	struct io_conn *reader, *writer;
+	char buf[32];
+};
+
+static struct io_op *poke_writer(struct io_conn *conn, struct buffer *buf);
+static struct io_op *poke_reader(struct io_conn *conn, struct buffer *buf);
+
+static struct io_op *do_read(struct io_conn *conn, struct buffer *buf)
+{
+	assert(conn == buf->reader);
+
+	return io_read(&buf->buf, sizeof(buf->buf),
+		       io_next(conn, poke_writer, buf));
+}
+
+static struct io_op *do_write(struct io_conn *conn, struct buffer *buf)
+{
+	assert(conn == buf->writer);
+
+	return io_write(&buf->buf, sizeof(buf->buf),
+			io_next(conn, poke_reader, buf));
+}
+
+static struct io_op *poke_writer(struct io_conn *conn, struct buffer *buf)
+{
+	assert(conn == buf->reader);
+
+	if (buf->iters == NUM_ITERS)
+		return io_close(conn, NULL);
+
+	/* You write. */
+	io_wake(buf->writer, do_write, buf);
+
+	/* I'll wait until you wake me. */
+	return io_idle(conn);
+}
+
+static struct io_op *poke_reader(struct io_conn *conn, struct buffer *buf)
+{
+	assert(conn == buf->writer);
+	/* You read. */
+	io_wake(buf->reader, do_read, buf);
+
+	if (++buf->iters == NUM_ITERS)
+		return io_close(conn, NULL);
+
+	/* I'll wait until you tell me to write. */
+	return io_idle(conn);
+}
+
+static struct io_op *reader(struct io_conn *conn, struct buffer *buf)
+{
+	assert(conn == buf->reader);
+
+	/* Wait for writer to tell us to read. */
+	return io_idle(conn);
+}
+
+static struct buffer buf[NUM];
+
+int main(void)
+{
+	unsigned int i;
+	int fds[2], last_read, last_write;
+
+	plan_tests(5 + NUM);
+
+	ok1(pipe(fds) == 0);
+	last_read = fds[0];
+	last_write = fds[1];
+
+	for (i = 1; i < NUM; i++) {
+		if (pipe(fds) < 0)
+			break;
+		memset(buf[i].buf, i, sizeof(buf[i].buf));
+		sprintf(buf[i].buf, "%i-%i", i, i);
+
+		buf[i].reader = io_new_conn(last_read, reader, NULL, &buf[i]);
+		if (!buf[i].reader)
+			break;
+		buf[i].writer = io_new_conn(fds[1], do_write, NULL, &buf[i]);
+		if (!buf[i].writer)
+			break;
+		last_read = fds[0];
+	}
+	if (!ok1(i == NUM))
+		exit(exit_status());
+
+	/* Last one completes the cirle. */
+	i = 0;
+	sprintf(buf[i].buf, "%i-%i", i, i);
+	buf[i].reader = io_new_conn(last_read, reader, NULL, &buf[i]);
+	ok1(buf[i].reader);
+	buf[i].writer = io_new_conn(last_write, do_write, NULL, &buf[i]);
+	ok1(buf[i].writer);
+
+	/* They should eventually exit */
+	ok1(io_loop() == NULL);
+
+	for (i = 0; i < NUM; i++) {
+		char b[sizeof(buf[0].buf)];
+		memset(b, i, sizeof(b));
+		sprintf(b, "%i-%i", i, i);
+		ok1(memcmp(b, buf[(i + NUM_ITERS) % NUM].buf, sizeof(b)) == 0);
+	}
+
+	/* This exits depending on whether all tests passed */
+	return exit_status();
+}