org.apache.bookkeeper.common.util.nativeio.NativeIO Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.bookkeeper.common.util.nativeio;
/**
* NativeIO API.
*/
public interface NativeIO {
// These constants are different per each OS, so the correct values are defined in JNI code
int O_CREAT = 0x01;
int O_RDONLY = 0x02;
int O_WRONLY = 0x04;
int O_TRUNC = 0x08;
int O_DIRECT = 0x10;
int O_DSYNC = 0x20;
int SEEK_SET = 0;
int SEEK_END = 2;
int FALLOC_FL_ZERO_RANGE = 0x10;
int open(String pathname, int flags, int mode) throws NativeIOException;
int fsync(int fd) throws NativeIOException;
/**
* fallocate is a linux-only syscall, so callers must handle the possibility that it does
* not exist.
*/
int fallocate(int fd, int mode, long offset, long len) throws NativeIOException;
/**
* posix_fadvise is a linux-only syscall, so callers must handle the possibility that it does
* not exist.
*/
int posix_fadvise(int fd, long offset, long len, int flag) throws NativeIOException;
int pwrite(int fd, long pointer, int count, long offset) throws NativeIOException;
long posix_memalign(int alignment, int size) throws NativeIOException;
void free(long pointer) throws NativeIOException;
long lseek(int fd, long offset, int whence) throws NativeIOException;
long pread(int fd, long pointer, long size, long offset) throws NativeIOException;
int close(int fd) throws NativeIOException;
}