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package com.mbien.opencl;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.Collections;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;
import static com.mbien.opencl.CLException.*;
/**
*
* @author Michael Bien
*/
public final class CLDevice {
/**
* Enumeration for the type of a device.
*/
public enum Type {
/**
* CL_DEVICE_TYPE_CPU
*/
CPU(CL.CL_DEVICE_TYPE_CPU),
/**
* CL_DEVICE_TYPE_GPU
*/
GPU(CL.CL_DEVICE_TYPE_GPU),
/**
* CL_DEVICE_TYPE_ACCELERATOR
*/
ACCELERATOR(CL.CL_DEVICE_TYPE_ACCELERATOR),
/**
* CL_DEVICE_TYPE_DEFAULT
*/
DEFAULT(CL.CL_DEVICE_TYPE_DEFAULT);
/**
* Value of wrapped OpenCL device type.
*/
public final int CL_TYPE;
private Type(int CL_TYPE) {
this.CL_TYPE = CL_TYPE;
}
public static Type valueOf(int clDeviceType) {
switch(clDeviceType) {
case(CL.CL_DEVICE_TYPE_DEFAULT):
return DEFAULT;
case(CL.CL_DEVICE_TYPE_CPU):
return CPU;
case(CL.CL_DEVICE_TYPE_GPU):
return GPU;
case(CL.CL_DEVICE_TYPE_ACCELERATOR):
return ACCELERATOR;
}
return null;
}
}
private final CL cl;
private CLContext context;
/**
* OpenCL device id for this device.
*/
public final long ID;
CLDevice(CL cl, long id) {
this.cl = cl;
this.ID = id;
}
CLDevice(CLContext context, long id) {
this.context = context;
this.cl = context.cl;
this.ID = id;
}
public CLCommandQueue createCommandQueue() {
return createCommandQueue(0);
}
public CLCommandQueue createCommandQueue(long properties) {
if(context == null)
throw new IllegalStateException("this device is not associated with a context");
return context.createCommandQueue(this, properties);
}
/*keep this package private for now, may be null*/
CLContext getContext() {
return context;
}
/**
* Returns the name of this device.
*/
public String getName() {
return getInfoString(CL.CL_DEVICE_NAME);
}
/**
* Returns the OpenCL profile of this device.
*/
public String getProfile() {
return getInfoString(CL.CL_DEVICE_PROFILE);
}
/**
* Returns the vendor of this device.
*/
public String getVendor() {
return getInfoString(CL.CL_DEVICE_VENDOR);
}
/**
* Returns the type of this device.
*/
public Type getType() {
return Type.valueOf((int)getInfoLong(CL.CL_DEVICE_TYPE));
}
/**
* Returns the maximal number of compute units.
*/
public int getMaxComputeUnits() {
return (int) getInfoLong(CL.CL_DEVICE_MAX_COMPUTE_UNITS);
}
/**
* Returns the maximal work group size.
*/
public int getMaxWorkGroupSize() {
return (int) getInfoLong(CL.CL_DEVICE_MAX_WORK_GROUP_SIZE);
}
/**
* Returns the max clock frequency in Hz.
*/
public int getMaxClockFrequency() {
return (int) (getInfoLong(CL.CL_DEVICE_MAX_CLOCK_FREQUENCY));
}
/**
* Returns the global memory size in Bytes.
*/
public long getGlobalMemSize() {
return getInfoLong(CL.CL_DEVICE_GLOBAL_MEM_SIZE);
}
/**
* Returns the local memory size in Bytes.
*/
public long getLocalMemSize() {
return getInfoLong(CL.CL_DEVICE_LOCAL_MEM_SIZE);
}
/**
* Returns all device extension names as unmodifiable Set.
*/
public Set<String> getExtensions() {
String ext = getInfoString(CL.CL_DEVICE_EXTENSIONS);
Scanner scanner = new Scanner(ext);
Set<String> extSet = new HashSet<String>();
while(scanner.hasNext())
extSet.add(scanner.next());
return Collections.unmodifiableSet(extSet);
}
//TODO CL_DEVICE_IMAGE_SUPPORT
//TODO CL_DEVICE_MAX_WORK_ITEM_SIZES
private final long getInfoLong(int key) {
ByteBuffer bb = ByteBuffer.allocate(8);
bb.order(ByteOrder.nativeOrder());
int ret = cl.clGetDeviceInfo(ID, key, bb.capacity(), bb, null, 0);
checkForError(ret, "can not receive device info");
return bb.getLong();
}
public final String getInfoString(int key) {
long[] longBuffer = new long[1];
ByteBuffer bb = ByteBuffer.allocate(512);
int ret = cl.clGetDeviceInfo(ID, key, bb.capacity(), bb, longBuffer, 0);
checkForError(ret, "can not receive device info string");
return new String(bb.array(), 0, (int)longBuffer[0]);
}
@Override
public String toString() {
return "CLDevice [id: " + ID
+ " name: " + getName()
+ " type: " + getType()
+ " profile: " + getProfile()+"]";
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final CLDevice other = (CLDevice) obj;
if (this.ID != other.ID) {
return false;
}
return true;
}
@Override
public int hashCode() {
int hash = 3;
hash = 79 * hash + (int) (this.ID ^ (this.ID >>> 32));
return hash;
}
}
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