org.apache.tomcat.jni

Class Stdlib

java.lang.Object

org.apache.tomcat.jni.Stdlib

public class Stdlib
extends Object

Stdlib

Author:

Mladen Turk

Constructor Summary

Constructors

Constructor and Description
Stdlib()

Method Summary

Modifier and Type	Method and Description
static long	calloc(int num, int sz) Allocates an array in memory with elements initialized to 0.
static void	free(long mem) Deallocates or frees a memory block.
static int	getpid() Get current process pid.
static int	getppid() Get current process parent pid.
static long	malloc(int sz) Allocates memory blocks.
static boolean	memread(byte[] dst, long src, int sz) Read from plain memory
static boolean	memset(long dst, int c, int sz) Sets buffers to a specified character
static boolean	memwrite(long dst, byte[] src, int sz) Write to plain memory
static long	realloc(long mem, int sz) Reallocate memory blocks.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Stdlib

public Stdlib()

Method Detail

memread

public static boolean memread(byte[] dst,
                              long src,
                              int sz)

Read from plain memory

Parameters:

dst - Destination byte array

src - Source memory address

sz - Number of bytes to copy.

Returns:

true if the operation was successful

memwrite

public static boolean memwrite(long dst,
                               byte[] src,
                               int sz)

Write to plain memory

Parameters:

dst - Destination memory address

src - Source byte array

sz - Number of bytes to copy.

Returns:

true if the operation was successful

memset

public static boolean memset(long dst,
                             int c,
                             int sz)

Sets buffers to a specified character

Parameters:

dst - Destination memory address

c - Character to set.

sz - Number of characters.

Returns:

true if the operation was successful

malloc

public static long malloc(int sz)

Allocates memory blocks.

Parameters:

sz - Bytes to allocate.

Returns:

a pointer

realloc

public static long realloc(long mem,
                           int sz)

Reallocate memory blocks.

Parameters:

mem - Pointer to previously allocated memory block.

sz - New size in bytes.

Returns:

a pointer

calloc

public static long calloc(int num,
                          int sz)

Allocates an array in memory with elements initialized to 0.

Parameters:

num - Number of elements.

sz - Length in bytes of each element.

Returns:

a pointer

free

public static void free(long mem)

Deallocates or frees a memory block.

Parameters:

mem - Previously allocated memory block to be freed.

getpid

public static int getpid()

Get current process pid.

Returns:

current pid or < 1 in case of error.

getppid

public static int getppid()

Get current process parent pid.

Returns:

parent pid or < 1 in case of error.