Merge pull request #827 from joaomoreno/mutex

Support Windows mutexes

fixes #822

npm-shrinkwrap.json

@@ -460,6 +460,22 @@
           "resolved": "https://registry.npmjs.org/pend/-/pend-1.2.0.tgz"
         }
       }
+    },
+    "windows-mutex": {
+      "version": "0.1.3",
+      "from": "windows-mutex@0.1.3",
+      "dependencies": {
+        "bindings": {
+          "version": "1.2.1",
+          "from": "bindings@>=1.2.1 <2.0.0",
+          "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.2.1.tgz"
+        },
+        "nan": {
+          "version": "2.1.0",
+          "from": "nan@>=2.1.0 <3.0.0",
+          "resolved": "https://registry.npmjs.org/nan/-/nan-2.1.0.tgz"
+        }
+      }
     }
   }
 }

package.json

@@ -12,7 +12,7 @@
   },
   "scripts": {
     "test": "node node_modules/mocha/bin/_mocha",
-		"preinstall": "node build/npm/preinstall.js",
+    "preinstall": "node build/npm/preinstall.js",
     "postinstall": "npm --prefix extensions/csharp-o/ install extensions/csharp-o/ && npm --prefix extensions/vscode-api-tests/ install extensions/vscode-api-tests/"
   },
   "dependencies": {
@@ -89,5 +89,8 @@
     "ghooks": {
       "pre-commit": "node build/gulpfile.hygiene.js"
     }
+  },
+  "optionalDependencies": {
+    "windows-mutex": "^0.1.3"
   }
 }

src/typings/windows-mutex.ts

@@ -0,0 +1,12 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+declare module 'windows-mutex' {
+	export class Mutex {
+		constructor(name: string);
+		isActive(): boolean;
+		release(): void;
+	}
+}

src/vs/workbench/electron-main/main.ts

@@ -9,7 +9,6 @@ import app = require('app');
 import fs = require('fs');
 import dialog = require('dialog');
 import shell = require('shell');
-
 import nls = require('vs/nls');
 import {assign} from 'vs/base/common/objects';
 import platform = require('vs/base/common/platform');
@@ -233,6 +232,15 @@ function setupIPC(): TPromise<Server> {
 	return setup(true);
 }
 
+function setupMutex() {
+	try {
+		var Mutex = (<any> require.__$__nodeRequire('windows-mutex')).Mutex;
+		new Mutex('vscode');
+	} catch (e) {
+		// noop
+	}
+}
+
 // On some platforms we need to manually read from the global environment variables
 // and assign them to the process environment (e.g. when doubleclick app on Mac)
 getUserEnvironment()
@@ -241,6 +249,7 @@ getUserEnvironment()
 
 		return timebomb()
 			.then(setupIPC)
+			.then(ipcServer => { setupMutex(); return ipcServer; })
 			.then(ipcServer => main(ipcServer, userEnv));
 	})
 	.done(null, quit);