future: remove Future.ready usage

Removed unused Future.ready channel.

Closes #497

Author: laines-it

CHANGELOG.md

@@ -22,7 +22,7 @@ Versioning](http://semver.org/spec/v2.0.0.html) except to the first release.
 * Removed deprecated `pool` methods, related interfaces and tests are updated (#478).
 * Removed deprecated `box.session.push()` support: Future.AppendPush()
   and Future.GetIterator() methods, ResponseIterator and TimeoutResponseIterator types,
-  Future.pushes[] (#480).
+  Future.pushes[], Future.ready (#480, #497).
 * `LogAppendPushFailed` replaced with `LogBoxSessionPushUnsupported` (#480)
 
 ### Fixed

connection.go

@@ -934,7 +934,6 @@ func (conn *Connection) newFuture(req Request) (fut *Future) {
 				ErrRateLimited,
 				"Request is rate limited on client",
 			}
-			fut.ready = nil
 			fut.done = nil
 			return
 		}
@@ -949,7 +948,6 @@ func (conn *Connection) newFuture(req Request) (fut *Future) {
 			ErrConnectionClosed,
 			"using closed connection",
 		}
-		fut.ready = nil
 		fut.done = nil
 		shard.rmut.Unlock()
 		return
@@ -958,7 +956,6 @@ func (conn *Connection) newFuture(req Request) (fut *Future) {
 			ErrConnectionNotReady,
 			"client connection is not ready",
 		}
-		fut.ready = nil
 		fut.done = nil
 		shard.rmut.Unlock()
 		return
@@ -967,7 +964,6 @@ func (conn *Connection) newFuture(req Request) (fut *Future) {
 			ErrConnectionShutdown,
 			"server shutdown in progress",
 		}
-		fut.ready = nil
 		fut.done = nil
 		shard.rmut.Unlock()
 		return
@@ -1038,7 +1034,7 @@ func (conn *Connection) send(req Request, streamId uint64) *Future {
 	conn.incrementRequestCnt()
 
 	fut := conn.newFuture(req)
-	if fut.ready == nil {
+	if fut.done == nil {
 		conn.decrementRequestCnt()
 		return fut
 	}

future.go

@@ -15,7 +15,6 @@ type Future struct {
 	mutex     sync.Mutex
 	resp      Response
 	err       error
-	ready     chan struct{}
 	done      chan struct{}
 }
 
@@ -41,7 +40,6 @@ func (fut *Future) isDone() bool {
 // NewFuture creates a new empty Future for a given Request.
 func NewFuture(req Request) (fut *Future) {
 	fut = &Future{}
-	fut.ready = make(chan struct{}, 1000000000)
 	fut.done = make(chan struct{})
 	fut.req = req
 	return fut
@@ -62,7 +60,6 @@ func (fut *Future) SetResponse(header Header, body io.Reader) error {
 	}
 	fut.resp = resp
 
-	close(fut.ready)
 	close(fut.done)
 	return nil
 }
@@ -77,7 +74,6 @@ func (fut *Future) SetError(err error) {
 	}
 	fut.err = err
 
-	close(fut.ready)
 	close(fut.done)
 }