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performance improvement when fetching memory (using System.arraycopy instead of earlier for-loop)

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+ code formatting (causing a lot of cvs diffs)
This commit is contained in:
fros4943 2006-08-23 15:48:15 +00:00
parent 5d6358b602
commit 52c14b8a4e
1 changed files with 123 additions and 105 deletions
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228
tools/cooja/java/se/sics/cooja/SectionMoteMemory.java
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@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: SectionMoteMemory.java,v 1.1 2006/08/21 12:12:56 fros4943 Exp $
* $Id: SectionMoteMemory.java,v 1.2 2006/08/23 15:48:15 fros4943 Exp $
*/
package se.sics.cooja;
@ -39,13 +39,13 @@ import org.apache.log4j.Logger;
import se.sics.cooja.MoteMemory;
/**
* Represents a mote memory consisting of non-overlapping
* memory sections. This memory also contains information
* about variable starts addresses.
* Represents a mote memory consisting of non-overlapping memory sections. This
* memory also contains information about variable starts addresses.
* <p>
* When an unhandled memory segment is set a new section is
* automatically created for this segment.
* When an unhandled memory segment is set a new section is automatically
* created for this segment.
* <p>
*
* @author Fredrik Osterlind
*/
public class SectionMoteMemory implements MoteMemory {
@ -53,12 +53,13 @@ public class SectionMoteMemory implements MoteMemory {
private Vector<MoteMemorySection> sections = new Vector<MoteMemorySection>();
private final Properties variableAddresses;
/**
* Create a new mote memory with information about which
* variables exist and their relative memory addresses.
* Create a new mote memory with information about which variables exist and
* their relative memory addresses.
*
* @param variableAddresses Variable addresses
* @param variableAddresses
* Variable addresses
*/
public SectionMoteMemory(Properties variableAddresses) {
this.variableAddresses = variableAddresses;
@ -70,20 +71,21 @@ public class SectionMoteMemory implements MoteMemory {
public String[] getVariableNames() {
String[] names = new String[variableAddresses.size()];
Enumeration nameEnum = variableAddresses.keys();
for (int i=0; i < variableAddresses.size(); i++) {
for (int i = 0; i < variableAddresses.size(); i++) {
names[i] = (String) nameEnum.nextElement();
}
return names;
}
public void clearMemory() {
sections.clear();
}
public byte[] getMemorySegment(int address, int size) {
for (int i=0; i < sections.size(); i++) {
if (sections.elementAt(i).includesAddr(address) && sections.elementAt(i).includesAddr(address + size - 1)) {
return sections.elementAt(i).getMemorySegment(address, size);
for (MoteMemorySection section : sections) {
if (section.includesAddr(address)
&& section.includesAddr(address + size - 1)) {
return section.getMemorySegment(address, size);
}
}
return null;
@ -91,9 +93,10 @@ public class SectionMoteMemory implements MoteMemory {
public void setMemorySegment(int address, byte[] data) {
// TODO Creating overlapping memory sections possible
for (int i=0; i < sections.size(); i++) {
if (sections.elementAt(i).includesAddr(address) && sections.elementAt(i).includesAddr(address + data.length - 1)) {
sections.elementAt(i).setMemorySegment(address, data);
for (MoteMemorySection section : sections) {
if (section.includesAddr(address)
&& section.includesAddr(address + data.length - 1)) {
section.setMemorySegment(address, data);
return;
}
}
@ -102,7 +105,7 @@ public class SectionMoteMemory implements MoteMemory {
public int getTotalSize() {
int totalSize = 0;
for (MoteMemorySection section: sections)
for (MoteMemorySection section : sections)
totalSize += section.getSize();
return totalSize;
}
@ -117,29 +120,31 @@ public class SectionMoteMemory implements MoteMemory {
}
/**
* Removes a memory segment from this memory.
* The section containing the segment may be split into two sections.
*
* @param startAddr Start address
* @param size Length
* Removes a memory segment from this memory. The section containing the
* segment may be split into two sections.
*
* @param startAddr
* Start address
* @param size
* Length
*/
public void removeSegmentFromMemory(int startAddr, int size) {
for (MoteMemorySection section: sections)
for (MoteMemorySection section : sections)
// Find section containing segment to remove
if (section.includesAddr(startAddr) &&
section.includesAddr(startAddr + size - 1)) {
if (section.includesAddr(startAddr)
&& section.includesAddr(startAddr + size - 1)) {
MoteMemorySection oldSection = section;
byte[] dataFirstPart = oldSection.getMemorySegment(
oldSection.startAddr,
(int) (startAddr - oldSection.startAddr)
);
byte[] dataSecondPart = oldSection.getMemorySegment(
startAddr + size,
(int) (oldSection.startAddr + oldSection.getSize() - (startAddr + size)));
MoteMemorySection newSectionFirstPart = new MoteMemorySection(oldSection.startAddr, dataFirstPart);
MoteMemorySection newSectionSecondPart = new MoteMemorySection(startAddr + size, dataSecondPart);
oldSection.startAddr, (int) (startAddr - oldSection.startAddr));
byte[] dataSecondPart = oldSection
.getMemorySegment(startAddr + size, (int) (oldSection.startAddr
+ oldSection.getSize() - (startAddr + size)));
MoteMemorySection newSectionFirstPart = new MoteMemorySection(
oldSection.startAddr, dataFirstPart);
MoteMemorySection newSectionSecondPart = new MoteMemorySection(
startAddr + size, dataSecondPart);
// Remove old section, add new sections
sections.remove(oldSection);
@ -149,12 +154,12 @@ public class SectionMoteMemory implements MoteMemory {
sections.add(newSectionSecondPart);
}
}
/**
* Get start address of section at given position.
*
* @param sectionNr Section position
* @param sectionNr
* Section position
* @return Start address of section
*/
public int getStartAddrOfSection(int sectionNr) {
@ -167,7 +172,8 @@ public class SectionMoteMemory implements MoteMemory {
/**
* Get size of section at given position.
*
* @param sectionNr Section position
* @param sectionNr
* Section position
* @return Size of section
*/
public int getSizeOfSection(int sectionNr) {
@ -180,7 +186,8 @@ public class SectionMoteMemory implements MoteMemory {
/**
* Get data of section at given position.
*
* @param sectionNr Section position
* @param sectionNr
* Section position
* @return Data at section
*/
public byte[] getDataOfSection(int sectionNr) {
@ -193,7 +200,8 @@ public class SectionMoteMemory implements MoteMemory {
/**
* Returns a value of the integer variable with the given name.
*
* @param varName Name of integer variable
* @param varName
* Name of integer variable
* @return Value of integer variable
*/
public int getIntValueOf(String varName) {
@ -220,34 +228,37 @@ public class SectionMoteMemory implements MoteMemory {
/**
* Set integer value of variable with given name.
*
* @param varName Name of integer variable
* @param newVal New value to set
* @param varName
* Name of integer variable
* @param newVal
* New value to set
*/
public void setIntValueOf(String varName, int newVal) {
// Get start address of variable
if (!variableAddresses.containsKey(varName))
return;
int varAddr = ((Integer) variableAddresses.get(varName)).intValue();
// TODO Check if small/big-endian when coming from JNI?
int newValToSet = Integer.reverseBytes(newVal);
// Create byte array
int pos = 0;
byte[] varData = new byte[4];
varData[pos++] = (byte) ((newValToSet & 0xFF000000) >> 24);
varData[pos++] = (byte) ((newValToSet & 0xFF0000) >> 16);
varData[pos++] = (byte) ((newValToSet & 0xFF00) >> 8);
varData[pos++] = (byte) ((newValToSet & 0xFF) >> 0);
varData[pos++] = (byte) ((newValToSet & 0xFF000000) >> 24);
varData[pos++] = (byte) ((newValToSet & 0xFF0000) >> 16);
varData[pos++] = (byte) ((newValToSet & 0xFF00) >> 8);
varData[pos++] = (byte) ((newValToSet & 0xFF) >> 0);
setMemorySegment(varAddr, varData);
}
/**
* Returns a value of the byte variable with the given name.
*
* @param varName Name of byte variable
* @param varName
* Name of byte variable
* @return Value of byte variable
*/
public byte getByteValueOf(String varName) {
@ -264,8 +275,10 @@ public class SectionMoteMemory implements MoteMemory {
/**
* Set byte value of variable with given name.
*
* @param varName Name of byte variable
* @param newVal New value to set
* @param varName
* Name of byte variable
* @param newVal
* New value to set
*/
public void setByteValueOf(String varName, byte newVal) {
// Get start address of variable
@ -283,8 +296,10 @@ public class SectionMoteMemory implements MoteMemory {
/**
* Returns byte array of given length and with the given name.
*
* @param varName Name of array
* @param length Length of array
* @param varName
* Name of array
* @param length
* Length of array
* @return Data of array
*/
public byte[] getByteArray(String varName, int length) {
@ -300,8 +315,10 @@ public class SectionMoteMemory implements MoteMemory {
/**
* Set byte array of the variable with the given name.
*
* @param varName Name of array
* @param data New data of array
* @param varName
* Name of array
* @param data
* New data of array
*/
public void setByteArray(String varName, byte[] data) {
// Get start address of variable
@ -312,7 +329,7 @@ public class SectionMoteMemory implements MoteMemory {
// TODO Check if small/big-endian when coming from JNI?
setMemorySegment(varAddr, data);
}
/**
* A memory section represented of a byte array and a start address.
*
@ -325,8 +342,10 @@ public class SectionMoteMemory implements MoteMemory {
/**
* Create a new memory section.
*
* @param startAddr Start address of section
* @param data Data of section
* @param startAddr
* Start address of section
* @param data
* Data of section
*/
public MoteMemorySection(int startAddr, byte[] data) {
this.startAddr = startAddr;
@ -363,60 +382,60 @@ public class SectionMoteMemory implements MoteMemory {
/**
* True if given address is part of this memory section.
*
* @param addr Address
* @return True if given address is part of this memory section, false otherwise
* @param addr
* Address
* @return True if given address is part of this memory section, false
* otherwise
*/
public boolean includesAddr(int addr) {
if (data == null)
return false;
return (addr >= startAddr && addr < (startAddr + data.length));
}
/**
* Returns memory segment.
*
* @param addr Start address of memory segment
* @param size Size of memory segment
* @param addr
* Start address of memory segment
* @param size
* Size of memory segment
* @return Memory segment
*/
public byte[] getMemorySegment(int addr, int size) {
byte[] ret = new byte[size];
for (int i = 0; i < size; i++)
ret[i] = data[(int) (addr - startAddr + i)];
System.arraycopy(data, addr - startAddr, ret, 0, size);
return ret;
}
/**
* Sets a memory segment.
* @param addr Start of memory segment
* @param data Data of memory segment
*
* @param addr
* Start of memory segment
* @param data
* Data of memory segment
*/
public void setMemorySegment(int addr, byte[] data) {
int nonnull=0;
for (int i = 0; i < data.length; i++) {
if (data[i] != 0) nonnull++;
this.data[(int) (addr - startAddr + i)] = data[i];
}
System.arraycopy(data, 0, this.data, addr - startAddr, data.length);
}
public MoteMemorySection clone() {
byte[] dataClone = new byte[data.length];
for (int i=0; i < data.length; i++)
dataClone[i] = data[i];
System.arraycopy(data, 0, dataClone, 0, data.length);
MoteMemorySection clone = new MoteMemorySection(startAddr, dataClone);
return clone;
}
}
// EXPERIMENTAL AND DEBUG METHODS
public SectionMoteMemory clone() {
Vector<MoteMemorySection> clonedSections = new Vector<MoteMemorySection>();
for (int i=0; i < sections.size(); i++) {
clonedSections.add((MoteMemorySection) sections.elementAt(i).clone());
for (MoteMemorySection section : sections) {
clonedSections.add(section.clone());
}
SectionMoteMemory clone = new SectionMoteMemory(variableAddresses);
@ -429,9 +448,9 @@ public class SectionMoteMemory implements MoteMemory {
MessageDigest messageDigest;
try {
messageDigest = MessageDigest.getInstance("MD5");
for (int i=0; i < sections.size(); i++) {
messageDigest.update(sections.get(i).data, 0, sections.get(i).getSize());
for (MoteMemorySection section : sections) {
messageDigest.update(section.data, 0, section.getSize());
}
} catch (NoSuchAlgorithmException e) {
return null;
@ -439,15 +458,16 @@ public class SectionMoteMemory implements MoteMemory {
return messageDigest.digest();
}
protected Vector<Integer> getDifferenceAddressesOf(SectionMoteMemory anotherMem) {
protected Vector<Integer> getDifferenceAddressesOf(
SectionMoteMemory anotherMem) {
Vector<Integer> differences = new Vector<Integer>();
if (this.getNumberOfSections() != anotherMem.getNumberOfSections()) {
logger.fatal("Number of section do not match!");
return null;
}
for (int i=0; i < sections.size(); i++) {
for (int i = 0; i < sections.size(); i++) {
if (this.getSizeOfSection(i) != anotherMem.getSizeOfSection(i)) {
logger.fatal("Section " + i + " sizes do not match!");
return null;
@ -456,8 +476,8 @@ public class SectionMoteMemory implements MoteMemory {
logger.fatal("Section " + i + " start addresses do not match!");
return null;
}
for (int j=0; j < sections.get(i).getSize(); j++)
for (int j = 0; j < sections.get(i).getSize(); j++)
if (this.sections.get(i).data[j] != anotherMem.getDataOfSection(i)[j])
differences.add(new Integer(sections.get(i).startAddr + j));
System.err.println();
@ -466,21 +486,21 @@ public class SectionMoteMemory implements MoteMemory {
}
protected void printMemory() {
for (int i=0; i < sections.size(); i++) {
for (int i = 0; i < sections.size(); i++) {
System.err.print("Section[" + i + "]: ");
for (int j=0; j < sections.get(i).getSize(); j++)
for (int j = 0; j < sections.get(i).getSize(); j++)
System.err.print(sections.get(i).getData()[j] + ",");
System.err.println();
}
}
protected void printDifferences(SectionMoteMemory anotherMem) {
if (this.getNumberOfSections() != anotherMem.getNumberOfSections()) {
logger.fatal("Number of section do not match!");
return;
}
for (int i=0; i < sections.size(); i++) {
for (int i = 0; i < sections.size(); i++) {
if (this.getSizeOfSection(i) != anotherMem.getSizeOfSection(i)) {
logger.fatal("Section " + i + " sizes do not match!");
return;
@ -489,24 +509,22 @@ public class SectionMoteMemory implements MoteMemory {
logger.fatal("Section " + i + " start addresses do not match!");
return;
}
System.err.print("Section[" + i + "]: ");
for (int j=0; j < sections.get(i).getSize(); j++)
for (int j = 0; j < sections.get(i).getSize(); j++)
if (this.sections.get(i).data[j] != anotherMem.getDataOfSection(i)[j])
System.err.print(j + ",");
System.err.println();
}
}
protected void printChecksum() {
byte[] checksum = this.getChecksum();
System.err.print("Checksum: ");
for (int i=0; i < checksum.length; i++) {
for (int i = 0; i < checksum.length; i++) {
System.err.print(checksum[i] + ",");
}
System.err.println();
}
}