src/java.base/linux/classes/sun/nio/ch/FileDispatcherImpl.java - master - githubmirror/jdk22

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

64 строки2 KB

Brian Burkhalter

8294399: (ch) Refactor some methods out of sun.nio.ch.UnixFileDispatcherImpl

27 окт 2022, 18:35

27 окт 2022, 18:35d667895

/*
 * Copyright (c) 2000, 2022, 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.
 */

package sun.nio.ch;

import java.io.FileDescriptor;

class FileDispatcherImpl extends UnixFileDispatcherImpl {
    FileDispatcherImpl() {
        super();
    }

    int maxDirectTransferSize() {
        return 0x7ffff000; // 2,147,479,552 maximum for sendfile()
    }

    long transferTo(FileDescriptor src, long position, long count,
                    FileDescriptor dst, boolean append) {
        return transferTo0(src, position, count, dst, append);
    }

    long transferFrom(FileDescriptor src, FileDescriptor dst,
                      long position, long count, boolean append) {
        return transferFrom0(src, dst, position, count, append);
    }

    // -- Native methods --

    static native long transferTo0(FileDescriptor src, long position,
                                   long count, FileDescriptor dst,
                                   boolean append);

    static native long transferFrom0(FileDescriptor src, FileDescriptor dst,
                                     long position, long count, boolean append);

    static native void init0();

    static {
        IOUtil.load();
        init0();
    }
}