New function to expose bufferevent.enabled

svn:r1401

ChangeLog

@@ -9,8 +9,9 @@ Changes in 2.0.3-alpha:
  o Make bufferevenr_socket_connect() work when the original fd was -1.
  o Fix a bug in bufferevent_socket_connect() when the connection succeeds too quickly.
  o Export an evutil_sockaddr_cmp() to compare to sockaddr objects for equality.
+ o Add a bufferevent_get_enabled() to tell what a bufferevent has been configured to do.
+
 
-       
 Changes in 2.0.2-alpha:
  o Add a new flag to bufferevents to make all callbacks automatically deferred.
  o Make evdns functionality locked, and automatically defer dns callbacks.

bufferevent.c

@@ -581,6 +581,16 @@ bufferevent_getfd(struct bufferevent *bev)
 	return (res<0) ? -1 : d.fd;
 }
 
+short
+bufferevent_get_enabled(struct bufferevent *bufev)
+{
+	short r;
+	BEV_LOCK(bufev);
+	r = bufev->enabled;
+	BEV_UNLOCK(bufev);
+	return r;
+}
+
 struct bufferevent *
 bufferevent_get_underlying(struct bufferevent *bev)
 {

include/event2/bufferevent.h

@@ -322,6 +322,13 @@ int bufferevent_enable(struct bufferevent *bufev, short event);
  */
 int bufferevent_disable(struct bufferevent *bufev, short event);
 
+/**
+   Return the events that are enabled on a given bufferevent.
+
+   @param bufev the bufferevent to inspect
+   @return A combination of EV_READ | EV_WRITE
+ */
+short bufferevent_get_enabled(struct bufferevent *bufev);
 
 /**
   Set the read and write timeout for a buffered event.

test/regress_bufferevent.c

@@ -140,6 +140,9 @@ test_bufferevent_impl(int use_pair)
 	bufferevent_disable(bev1, EV_READ);
 	bufferevent_enable(bev2, EV_READ);
 
+	tt_int_op(bufferevent_get_enabled(bev1), ==, EV_WRITE);
+	tt_int_op(bufferevent_get_enabled(bev2), ==, EV_WRITE|EV_READ);
+
 	for (i = 0; i < sizeof(buffer); i++)
 		buffer[i] = i;