src/java.base/unix/classes/sun/nio/ch/FileDispatcherImpl.java

@@ -28,10 +28,12 @@
 import java.io.FileDescriptor;
 import java.io.IOException;
 
 class FileDispatcherImpl extends FileDispatcher {
 
+    private int pageSize = -1;
+
     static {
         IOUtil.load();
         init();
     }
 

@@ -50,10 +52,24 @@
 
     long readv(FileDescriptor fd, long address, int len) throws IOException {
         return readv0(fd, address, len);
     }
 
+    int readDirect(FileDescriptor fd, long address, int len) throws IOException {
+        return readDirect0(fd, address, len);
+    }
+
+    int preadDirect(FileDescriptor fd, long address, int len, long position)
+        throws IOException
+    {
+        return preadDirect0(fd, address, len, position);
+    }
+
+    long readvDirect(FileDescriptor fd, long address, int len) throws IOException {
+        return readvDirect0(fd, address, len);
+    }
+
     int write(FileDescriptor fd, long address, int len) throws IOException {
         return write0(fd, address, len);
     }
 
     int pwrite(FileDescriptor fd, long address, int len, long position)

@@ -66,10 +82,26 @@
         throws IOException
     {
         return writev0(fd, address, len);
     }
 
+    int writeDirect(FileDescriptor fd, long address, int len) throws IOException {
+        return writeDirect0(fd, address, len);
+    }
+
+    int pwriteDirect(FileDescriptor fd, long address, int len, long position)
+        throws IOException
+    {
+        return pwriteDirect0(fd, address, len, position);
+    }
+
+    long writevDirect(FileDescriptor fd, long address, int len)
+        throws IOException
+    {
+        return writevDirect0(fd, address, len);
+    }
+
     int force(FileDescriptor fd, boolean metaData) throws IOException {
         return force0(fd, metaData);
     }
 
     int truncate(FileDescriptor fd, long size) throws IOException {

@@ -121,19 +153,37 @@
                              long position) throws IOException;
 
     static native long readv0(FileDescriptor fd, long address, int len)
         throws IOException;
 
+    static native int readDirect0(FileDescriptor fd, long address, int len)
+        throws IOException;
+
+    static native int preadDirect0(FileDescriptor fd, long address, int len,
+                             long position) throws IOException;
+
+    static native long readvDirect0(FileDescriptor fd, long address, int len)
+        throws IOException;
+
     static native int write0(FileDescriptor fd, long address, int len)
         throws IOException;
 
     static native int pwrite0(FileDescriptor fd, long address, int len,
                              long position) throws IOException;
 
     static native long writev0(FileDescriptor fd, long address, int len)
         throws IOException;
 
+    static native int writeDirect0(FileDescriptor fd, long address, int len)
+        throws IOException;
+
+    static native int pwriteDirect0(FileDescriptor fd, long address, int len,
+                             long position) throws IOException;
+
+    static native long writevDirect0(FileDescriptor fd, long address, int len)
+        throws IOException;
+
     static native int force0(FileDescriptor fd, boolean metaData)
         throws IOException;
 
     static native int truncate0(FileDescriptor fd, long size)
         throws IOException;

@@ -151,7 +201,6 @@
     static native void preClose0(FileDescriptor fd) throws IOException;
 
     static native void closeIntFD(int fd) throws IOException;
 
     static native void init();
-
 }