--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/windows/native/java/nio/MappedByteBuffer.c	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2001-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+#include "jni.h"
+#include "jni_util.h"
+#include "jvm.h"
+#include "jlong.h"
+#include "java_nio_MappedByteBuffer.h"
+#include <stdlib.h>
+
+JNIEXPORT jboolean JNICALL
+Java_java_nio_MappedByteBuffer_isLoaded0(JNIEnv *env, jobject obj,
+                                        jlong address, jlong len)
+{
+    jboolean loaded = JNI_FALSE;
+    /* Information not available?
+    MEMORY_BASIC_INFORMATION info;
+    void *a = (void *) jlong_to_ptr(address);
+    int result = VirtualQuery(a, &info, (DWORD)len);
+    */
+    return loaded;
+}
+
+JNIEXPORT jint JNICALL
+Java_java_nio_MappedByteBuffer_load0(JNIEnv *env, jobject obj, jlong address,
+                                     jlong len, jint pageSize)
+{
+    int *ptr = (int *) jlong_to_ptr(address);
+    int pageIncrement = pageSize / sizeof(int);
+    jlong numPages = (len + pageSize - 1) / pageSize;
+    int i = 0;
+    int j = 0;
+
+    /* touch every page */
+    for (i=0; i<numPages; i++) {
+        j += *((volatile int *)ptr);
+        ptr += pageIncrement;
+    }
+    return j;
+}
+
+JNIEXPORT void JNICALL
+Java_java_nio_MappedByteBuffer_force0(JNIEnv *env, jobject obj, jlong address,
+                                      jlong len)
+{
+    void *a = (void *) jlong_to_ptr(address);
+    int result;
+    int retry;
+
+    /*
+     * FlushViewOfFile can fail with ERROR_LOCK_VIOLATION if the memory
+     * system is writing dirty pages to disk. As there is no way to
+     * synchronize the flushing then we retry a limited number of times.
+     */
+    retry = 0;
+    do {
+        result = FlushViewOfFile(a, (DWORD)len);
+        if ((result != 0) || (GetLastError() != ERROR_LOCK_VIOLATION))
+            break;
+        retry++;
+    } while (retry < 3);
+
+    if (result == 0) {
+        JNU_ThrowIOExceptionWithLastError(env, "Flush failed");
+    }
+}