X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Fio%2Fio.c;h=83104f86b43ddfceed6d5bf7938a60d28ac159f2;hb=dded32f2b03fca526271e35671fa36d299880429;hp=ddcd502f367d3afdbbb3562b91f883be13072ece;hpb=c321a1d02755a77ae790d6e8976b2ff15edba89d;p=ccan

diff --git a/ccan/io/io.c b/ccan/io/io.c
index ddcd502f..83104f86 100644
--- a/ccan/io/io.c
+++ b/ccan/io/io.c
@@ -9,9 +9,15 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <poll.h>
+#include <unistd.h>
+#include <fcntl.h>
 
 void *io_loop_return;
 
+struct io_alloc io_alloc = {
+	malloc, realloc, free
+};
+
 #ifdef DEBUG
 /* Set to skip the next plan. */
 bool io_plan_nodebug;
@@ -40,6 +46,12 @@ struct io_plan io_debug(struct io_plan plan)
 	current->plan = plan;
 	backend_plan_changed(current);
 
+	/* If it closed, close duplex. */
+	if (!current->plan.next && current->duplex) {
+		current->duplex->plan = io_close_();
+		backend_plan_changed(current->duplex);
+	}
+
 	/* Call back into the loop immediately. */
 	io_loop_return = do_io_loop(&ready);
 
@@ -48,7 +60,7 @@ struct io_plan io_debug(struct io_plan plan)
 		if (!ready->plan.next) {
 			/* Call finish function immediately. */
 			if (ready->finish) {
-				errno = ready->plan.u.close.saved_errno;
+				errno = ready->plan.u1.s;
 				ready->finish(ready, ready->finish_arg);
 				ready->finish = NULL;
 			}
@@ -88,6 +100,10 @@ int io_debug_io(int ret)
 	case 1: /* Done: get next plan. */
 		if (timeout_active(conn))
 			backend_del_timeout(conn);
+		/* In case they call io_duplex, clear our poll flags so
+		 * both sides don't seem to be both doing read or write
+		 * (See	assert(!mask || pfd->events != mask) in poll.c) */
+		conn->plan.pollflag = 0;
 		conn->plan.next(conn, conn->plan.next_arg);
 		break;
 	default:
@@ -123,7 +139,7 @@ struct io_listener *io_new_listener_(int fd,
 				     void (*init)(int fd, void *arg),
 				     void *arg)
 {
-	struct io_listener *l = malloc(sizeof(*l));
+	struct io_listener *l = io_alloc.alloc(sizeof(*l));
 
 	if (!l)
 		return NULL;
@@ -133,7 +149,7 @@ struct io_listener *io_new_listener_(int fd,
 	l->init = init;
 	l->arg = arg;
 	if (!add_listener(l)) {
-		free(l);
+		io_alloc.free(l);
 		return NULL;
 	}
 	return l;
@@ -143,12 +159,12 @@ void io_close_listener(struct io_listener *l)
 {
 	close(l->fd.fd);
 	del_listener(l);
-	free(l);
+	io_alloc.free(l);
 }
 
 struct io_conn *io_new_conn_(int fd, struct io_plan plan)
 {
-	struct io_conn *conn = malloc(sizeof(*conn));
+	struct io_conn *conn = io_alloc.alloc(sizeof(*conn));
 
 	io_plan_debug_again();
 
@@ -163,7 +179,7 @@ struct io_conn *io_new_conn_(int fd, struct io_plan plan)
 	conn->duplex = NULL;
 	conn->timeout = NULL;
 	if (!add_conn(conn)) {
-		free(conn);
+		io_alloc.free(conn);
 		return NULL;
 	}
 	return conn;
@@ -185,7 +201,7 @@ struct io_conn *io_duplex_(struct io_conn *old, struct io_plan plan)
 
 	assert(!old->duplex);
 
-	conn = malloc(sizeof(*conn));
+	conn = io_alloc.alloc(sizeof(*conn));
 	if (!conn)
 		return NULL;
 
@@ -197,7 +213,7 @@ struct io_conn *io_duplex_(struct io_conn *old, struct io_plan plan)
 	conn->finish_arg = NULL;
 	conn->timeout = NULL;
 	if (!add_duplex(conn)) {
-		free(conn);
+		io_alloc.free(conn);
 		return NULL;
 	}
 	old->duplex = conn;
@@ -210,7 +226,7 @@ bool io_timeout_(struct io_conn *conn, struct timespec ts,
 	assert(cb);
 
 	if (!conn->timeout) {
-		conn->timeout = malloc(sizeof(*conn->timeout));
+		conn->timeout = io_alloc.alloc(sizeof(*conn->timeout));
 		if (!conn->timeout)
 			return false;
 	} else
@@ -225,13 +241,13 @@ bool io_timeout_(struct io_conn *conn, struct timespec ts,
 /* Returns true if we're finished. */
 static int do_write(int fd, struct io_plan *plan)
 {
-	ssize_t ret = write(fd, plan->u.write.buf, plan->u.write.len);
+	ssize_t ret = write(fd, plan->u1.cp, plan->u2.s);
 	if (ret < 0)
 		return io_debug_io(-1);
 
-	plan->u.write.buf += ret;
-	plan->u.write.len -= ret;
-	return io_debug_io(plan->u.write.len == 0);
+	plan->u1.cp += ret;
+	plan->u2.s -= ret;
+	return io_debug_io(plan->u2.s == 0);
 }
 
 /* Queue some data to be written. */
@@ -242,8 +258,8 @@ struct io_plan io_write_(const void *data, size_t len,
 	struct io_plan plan;
 
 	assert(cb);
-	plan.u.write.buf = data;
-	plan.u.write.len = len;
+	plan.u1.const_vp = data;
+	plan.u2.s = len;
 	plan.io = do_write;
 	plan.next = cb;
 	plan.next_arg = arg;
@@ -254,13 +270,13 @@ struct io_plan io_write_(const void *data, size_t len,
 
 static int do_read(int fd, struct io_plan *plan)
 {
-	ssize_t ret = read(fd, plan->u.read.buf, plan->u.read.len);
+	ssize_t ret = read(fd, plan->u1.cp, plan->u2.s);
 	if (ret <= 0)
 		return io_debug_io(-1);
 
-	plan->u.read.buf += ret;
-	plan->u.read.len -= ret;
-	return io_debug_io(plan->u.read.len == 0);
+	plan->u1.cp += ret;
+	plan->u2.s -= ret;
+	return io_debug_io(plan->u2.s == 0);
 }
 
 /* Queue a request to read into a buffer. */
@@ -271,8 +287,8 @@ struct io_plan io_read_(void *data, size_t len,
 	struct io_plan plan;
 
 	assert(cb);
-	plan.u.read.buf = data;
-	plan.u.read.len = len;
+	plan.u1.cp = data;
+	plan.u2.s = len;
 	plan.io = do_read;
 	plan.next = cb;
 	plan.next_arg = arg;
@@ -283,11 +299,11 @@ struct io_plan io_read_(void *data, size_t len,
 
 static int do_read_partial(int fd, struct io_plan *plan)
 {
-	ssize_t ret = read(fd, plan->u.readpart.buf, *plan->u.readpart.lenp);
+	ssize_t ret = read(fd, plan->u1.cp, *(size_t *)plan->u2.vp);
 	if (ret <= 0)
 		return io_debug_io(-1);
 
-	*plan->u.readpart.lenp = ret;
+	*(size_t *)plan->u2.vp = ret;
 	return io_debug_io(1);
 }
 
@@ -299,8 +315,8 @@ struct io_plan io_read_partial_(void *data, size_t *len,
 	struct io_plan plan;
 
 	assert(cb);
-	plan.u.readpart.buf = data;
-	plan.u.readpart.lenp = len;
+	plan.u1.cp = data;
+	plan.u2.vp = len;
 	plan.io = do_read_partial;
 	plan.next = cb;
 	plan.next_arg = arg;
@@ -311,11 +327,11 @@ struct io_plan io_read_partial_(void *data, size_t *len,
 
 static int do_write_partial(int fd, struct io_plan *plan)
 {
-	ssize_t ret = write(fd, plan->u.writepart.buf, *plan->u.writepart.lenp);
+	ssize_t ret = write(fd, plan->u1.cp, *(size_t *)plan->u2.vp);
 	if (ret < 0)
 		return io_debug_io(-1);
 
-	*plan->u.writepart.lenp = ret;
+	*(size_t *)plan->u2.vp = ret;
 	return io_debug_io(1);
 }
 
@@ -327,8 +343,8 @@ struct io_plan io_write_partial_(const void *data, size_t *len,
 	struct io_plan plan;
 
 	assert(cb);
-	plan.u.writepart.buf = data;
-	plan.u.writepart.lenp = len;
+	plan.u1.const_vp = data;
+	plan.u2.vp = len;
 	plan.io = do_write_partial;
 	plan.next = cb;
 	plan.next_arg = arg;
@@ -337,6 +353,59 @@ struct io_plan io_write_partial_(const void *data, size_t *len,
 	return plan;
 }
 
+static int already_connected(int fd, struct io_plan *plan)
+{
+	return io_debug_io(1);
+}
+
+static int do_connect(int fd, struct io_plan *plan)
+{
+	int err, ret;
+	socklen_t len = sizeof(err);
+
+	/* Has async connect finished? */
+	ret = getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len);
+	if (ret < 0)
+		return -1;
+
+	if (err == 0) {
+		/* Restore blocking if it was initially. */
+		fcntl(fd, F_SETFD, plan->u1.s);
+		return 1;
+	}
+	return 0;
+}
+
+struct io_plan io_connect_(int fd, const struct addrinfo *addr,
+			   struct io_plan (*cb)(struct io_conn*, void *),
+			   void *arg)
+{
+	struct io_plan plan;
+
+	assert(cb);
+
+	plan.next = cb;
+	plan.next_arg = arg;
+
+	/* Save old flags, set nonblock if not already. */
+	plan.u1.s = fcntl(fd, F_GETFD);
+	fcntl(fd, F_SETFD, plan.u1.s | O_NONBLOCK);
+
+	/* Immediate connect can happen. */
+	if (connect(fd, addr->ai_addr, addr->ai_addrlen) == 0) {
+		/* Dummy will be called immediately. */
+		plan.pollflag = POLLOUT;
+		plan.io = already_connected;
+	} else {
+		if (errno != EINPROGRESS)
+			return io_close_();
+
+		plan.pollflag = POLLIN;
+		plan.io = do_connect;
+	}
+	return plan;
+}
+
 struct io_plan io_idle_(void)
 {
 	struct io_plan plan;
@@ -378,10 +447,22 @@ void io_ready(struct io_conn *conn)
 	case 1: /* Done: get next plan. */
 		if (timeout_active(conn))
 			backend_del_timeout(conn);
+		/* In case they call io_duplex, clear our poll flags so
+		 * both sides don't seem to be both doing read or write
+		 * (See	assert(!mask || pfd->events != mask) in poll.c) */
+		conn->plan.pollflag = 0;
 		conn->plan = conn->plan.next(conn, conn->plan.next_arg);
 		backend_plan_changed(conn);
 	}
 	set_current(NULL);
+
+	/* If it closed, close duplex if not already */
+	if (!conn->plan.next && conn->duplex && conn->duplex->plan.next) {
+		set_current(conn->duplex);
+		conn->duplex->plan = io_close();
+		backend_plan_changed(conn->duplex);
+		set_current(NULL);
+	}
 }
 
 /* Close the connection, we're done. */
@@ -392,7 +473,7 @@ struct io_plan io_close_(void)
 	plan.pollflag = 0;
 	/* This means we're closing. */
 	plan.next = NULL;
-	plan.u.close.saved_errno = errno;
+	plan.u1.s = errno;
 
 	return plan;
 }
@@ -412,3 +493,17 @@ struct io_plan io_break_(void *ret, struct io_plan plan)
 
 	return plan;
 }
+
+int io_conn_fd(const struct io_conn *conn)
+{
+	return conn->fd.fd;
+}
+
+void io_set_alloc(void *(*allocfn)(size_t size),
+		  void *(*reallocfn)(void *ptr, size_t size),
+		  void (*freefn)(void *ptr))
+{
+	io_alloc.alloc = allocfn;
+	io_alloc.realloc = reallocfn;
+	io_alloc.free = freefn;
+}