Added @ThreadSafe.

src/main/java/net/rubygrapefruit/platform/FileSystem.java

@@ -5,24 +5,29 @@ import java.io.File;
 /**
  * Information about a file system. This is a snapshot view and does not change.
  */
+@ThreadSafe
 public interface FileSystem {
     /**
      * Returns the root directory of this file system.
      */
+    @ThreadSafe
     File getMountPoint();
 
     /**
      * Returns the operating system specific name for the type of this file system.
      */
+    @ThreadSafe
     String getFileSystemType();
 
     /**
      * Returns true if this file system is a remote file system, or false if local.
      */
+    @ThreadSafe
     boolean isRemote();
 
     /**
      * Returns the operating system specific name for this file system.
      */
+    @ThreadSafe
     String getDeviceName();
 }

src/main/java/net/rubygrapefruit/platform/FileSystems.java

@@ -5,11 +5,13 @@ import java.util.List;
 /**
  * Provides access to the file systems of the current machine.
  */
+@ThreadSafe
 public interface FileSystems extends NativeIntegration {
     /**
      * Returns the set of all file systems for the current machine.
      *
      * @throws NativeException On failure.
      */
+    @ThreadSafe
     List<FileSystem> getFileSystems() throws NativeException;
 }

src/main/java/net/rubygrapefruit/platform/PosixFile.java

@@ -5,12 +5,14 @@ import java.io.File;
 /**
  * Functions to query and modify a file's POSIX meta-data.
  */
+@ThreadSafe
 public interface PosixFile extends NativeIntegration {
     /**
      * Sets the mode for the given file.
      *
      * @throws NativeException On failure.
      */
+    @ThreadSafe
     void setMode(File path, int perms) throws NativeException;
 
     /**
@@ -18,6 +20,7 @@ public interface PosixFile extends NativeIntegration {
      *
      * @throws NativeException On failure.
      */
+    @ThreadSafe
     int getMode(File path) throws NativeException;
 
     /**
@@ -25,6 +28,7 @@ public interface PosixFile extends NativeIntegration {
      *
      * @throws NativeException On failure.
      */
+    @ThreadSafe
     void symlink(File link, String contents) throws NativeException;
 
     /**
@@ -32,5 +36,6 @@ public interface PosixFile extends NativeIntegration {
      *
      * @throws NativeException On failure.
      */
+    @ThreadSafe
     String readLink(File link) throws NativeException;
 }