org.apache.tomcat.jni
Class Stdlib

java.lang.Object
  org.apache.tomcat.jni.Stdlib

public class Stdlib
extends java.lang.Object

Stdlib

Author:

Mladen Turk

Stdlib

public Stdlib()

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.

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.

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.

malloc

public static long malloc(int sz)

Allocates memory blocks.

Parameters:

sz - Bytes to allocate.

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.

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.

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.