[platform] allows the IDE to shutdown gracefully when JNA isn't loaded (IDEA-159824)

platform/platform-impl/src/com/intellij/idea/StartupUtil.java

@@ -19,6 +19,7 @@ import com.intellij.ide.customize.CustomizeIDEWizardDialog;
 import com.intellij.ide.customize.CustomizeIDEWizardStepsProvider;
 import com.intellij.ide.plugins.PluginManagerCore;
 import com.intellij.ide.startupWizard.StartupWizard;
+import com.intellij.jna.JnaLoader;
 import com.intellij.openapi.application.ApplicationInfo;
 import com.intellij.openapi.application.ApplicationNamesInfo;
 import com.intellij.openapi.application.ConfigImportHelper;
@@ -37,7 +38,6 @@ import com.intellij.util.Consumer;
 import com.intellij.util.EnvironmentUtil;
 import com.intellij.util.PlatformUtils;
 import com.intellij.util.lang.UrlClassLoader;
-import com.sun.jna.Native;
 import org.apache.log4j.ConsoleAppender;
 import org.apache.log4j.Level;
 import org.apache.log4j.PatternLayout;
@@ -340,8 +340,7 @@ public class StartupUtil {
       System.setProperty("jna.nosys", "true");  // prefer bundled JNA dispatcher lib
     }
     try {
-      long t = System.currentTimeMillis();
-      log.info("JNA library loaded (" + (Native.POINTER_SIZE * 8) + "-bit) in " + (System.currentTimeMillis() - t) + " ms");
+      JnaLoader.load(log);
     }
     catch (Throwable t) {
       logError(log, "Unable to load JNA library", t);

platform/util/src/com/intellij/jna/JnaLoader.java

+/*
+ * Copyright 2000-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.jna;
+
+import com.intellij.openapi.diagnostic.Logger;
+import com.sun.jna.Native;
+
+public class JnaLoader {
+  private static volatile boolean ourJnaLoaded = false;
+
+  public static void load(Logger logger) {
+    long t = System.currentTimeMillis();
+    int ptrSize = Native.POINTER_SIZE;
+    t = System.currentTimeMillis() - t;
+    logger.info("JNA library (" + (ptrSize << 3) + "-bit) loaded in " + t + " ms");
+    ourJnaLoaded = true;
+  }
+
+  public static boolean isLoaded() {
+    return ourJnaLoaded;
+  }
+}
\ No newline at end of file

platform/util/src/com/intellij/util/Restarter.java

@@ -15,6 +15,7 @@
  */
 package com.intellij.util;
 
+import com.intellij.jna.JnaLoader;
 import com.intellij.openapi.application.PathManager;
 import com.intellij.openapi.util.SystemInfo;
 import com.intellij.openapi.util.io.FileUtilRt;
@@ -46,7 +47,7 @@ public class Restarter {
       return true;
     }
     if (SystemInfo.isWindows) {
-      return new File(PathManager.getBinPath(), "restarter.exe").exists();
+      return JnaLoader.isLoaded() && new File(PathManager.getBinPath(), "restarter.exe").exists();
     }
     if (SystemInfo.isMac) {
       return PathManager.getHomePath().contains(".app");