8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/unix/native/libnio/MappedByteBuffer.c

@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2001, 2010, Oracle and/or its affiliates. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.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 <sys/mman.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+JNIEXPORT jboolean JNICALL
+Java_java_nio_MappedByteBuffer_isLoaded0(JNIEnv *env, jobject obj, jlong address,
+                                         jlong len, jint numPages)
+{
+    jboolean loaded = JNI_TRUE;
+    int result = 0;
+    int i = 0;
+    void *a = (void *) jlong_to_ptr(address);
+#ifdef __linux__
+    unsigned char *vec = (unsigned char *)malloc(numPages * sizeof(char));
+#else
+    char *vec = (char *)malloc(numPages * sizeof(char));
+#endif
+
+    if (vec == NULL) {
+        JNU_ThrowOutOfMemoryError(env, NULL);
+        return JNI_FALSE;
+    }
+
+    result = mincore(a, (size_t)len, vec);
+    if (result == -1) {
+        JNU_ThrowIOExceptionWithLastError(env, "mincore failed");
+        free(vec);
+        return JNI_FALSE;
+    }
+
+    for (i=0; i<numPages; i++) {
+        if (vec[i] == 0) {
+            loaded = JNI_FALSE;
+            break;
+        }
+    }
+    free(vec);
+    return loaded;
+}
+
+
+JNIEXPORT void JNICALL
+Java_java_nio_MappedByteBuffer_load0(JNIEnv *env, jobject obj, jlong address,
+                                     jlong len)
+{
+    char *a = (char *)jlong_to_ptr(address);
+    int result = madvise((caddr_t)a, (size_t)len, MADV_WILLNEED);
+    if (result == -1) {
+        JNU_ThrowIOExceptionWithLastError(env, "madvise failed");
+    }
+}
+
+
+JNIEXPORT void JNICALL
+Java_java_nio_MappedByteBuffer_force0(JNIEnv *env, jobject obj, jobject fdo,
+                                      jlong address, jlong len)
+{
+    void* a = (void *)jlong_to_ptr(address);
+    int result = msync(a, (size_t)len, MS_SYNC);
+    if (result == -1) {
+        JNU_ThrowIOExceptionWithLastError(env, "msync failed");
+    }
+}