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/*
* 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.tomcat.jni;
/** Stdlib
*
* @author Mladen Turk
*/
public class Stdlib {
/**
* Read from plain memory
* @param dst Destination byte array
* @param src Source memory address
* @param sz Number of bytes to copy.
*/
public static native boolean memread(byte [] dst, long src, int sz);
/**
* Write to plain memory
* @param dst Destination memory address
* @param src Source byte array
* @param sz Number of bytes to copy.
*/
public static native boolean memwrite(long dst, byte [] src, int sz);
/**
* Sets buffers to a specified character
* @param dst Destination memory address
* @param c Character to set.
* @param sz Number of characters.
*/
public static native boolean memset(long dst, int c, int sz);
/**
* Allocates memory blocks.
* @param sz Bytes to allocate.
*/
public static native long malloc(int sz);
/**
* Reallocate memory blocks.
* @param mem Pointer to previously allocated memory block.
* @param sz New size in bytes.
*/
public static native long realloc(long mem, int sz);
/**
* Allocates an array in memory with elements initialized to 0.
* @param num Number of elements.
* @param sz Length in bytes of each element.
*/
public static native long calloc(int num, int sz);
/**
* Deallocates or frees a memory block.
* @param mem Previously allocated memory block to be freed.
*/
public static native void free(long mem);
/**
* Get current process pid.
* @return current pid or < 1 in case of error.
*/
public static native int getpid();
/**
* Get current process parent pid.
* @return parent pid or < 1 in case of error.
*/
public static native int getppid();
}
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