Add possibility to unlock all

README.md

@@ -84,6 +84,11 @@ if (mutex.tryLock()) {
 }
 ```
 
+Release all locks:
+```javascript
+mutex.unlockAll();
+```
+
 ### Read/Write locks
 
 Read/Write Locks are used to allow many actors to read from a resource, as

lib/Mutex.js

@@ -73,3 +73,7 @@ Mutex.prototype.unlock = function () {
 		this._isLocked = false;
 	}
 };
+
+Mutex.prototype.unlockAll = function() {
+	this._waiting = [];
+};

test/mutex.js

@@ -57,4 +57,14 @@ test('Mutex', function (t) {
 			});
 		});
 	});
+
+	mutex.lock(function () {
+		t.equal(mutex.isLocked, true, 'Locked');
+	});
+
+	mutex.lock(function () {
+		t.equal(mutex.isLocked, true, 'Locked');
+		mutex.unlockAll();
+		t.equal(mutex.isLocked, false, 'Lock is waiting to be acquired');
+	});
 });