io: closing one side of a duplex connection closes both.

[ccan] / ccan / io / io.c

diff --git a/ccan/io/io.c b/ccan/io/io.c
index 34b7cb0ce7ca6e739246a33b3a457aafb3e5a5b8..b74520444353761451529af0d0467522293f2686 100644 (file)
--- a/ccan/io/io.c
+++ b/ccan/io/io.c
@@ -14,6 +14,10 @@
 
 void *io_loop_return;
 
+struct io_alloc io_alloc = {
+       malloc, realloc, free
+};
+
 #ifdef DEBUG
 /* Set to skip the next plan. */
 bool io_plan_nodebug;
@@ -42,6 +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);
 
@@ -125,7 +135,7 @@ 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;
@@ -135,7 +145,7 @@ 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;
@@ -145,12 +155,12 @@ 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();
 
@@ -165,7 +175,7 @@ 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;
@@ -187,7 +197,7 @@ 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;
 
@@ -199,7 +209,7 @@ 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;
@@ -212,7 +222,7 @@ 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
@@ -437,6 +447,14 @@ void io_ready(struct io_conn *conn)
                backend_plan_changed(conn);
        }
        set_current(NULL);
+
+       /* If it closed, close duplex. */
+       if (!conn->plan.next && conn->duplex) {
+               set_current(conn->duplex);
+               conn->duplex->plan = io_close();
+               backend_plan_changed(conn->duplex);
+               set_current(NULL);
+       }
 }
 
 /* Close the connection, we're done. */
@@ -467,3 +485,17 @@ 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;
+}