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package com.mbien.opencl;
import java.nio.ByteBuffer;
/**
*
* @author Michael Bien
*/
public final class CLPlatform {
/**
* OpenCL platform id for this platform.
*/
public final long platformID;
private final CL cl;
CLPlatform(CL cl, long id) {
this.platformID = id;
this.cl = cl;
}
/**
* Lists all physical devices available on this platform.
*/
public CLDevice[] listCLDevices() {
int[] intBuffer = new int[1];
//find all devices
int ret = cl.clGetDeviceIDs(platformID, CL.CL_DEVICE_TYPE_ALL, 0, null, 0, intBuffer, 0);
if(CL.CL_SUCCESS != ret)
throw new CLException(ret, "error while enumerating devices");
long[] deviceIDs = new long[intBuffer[0]];
ret = cl.clGetDeviceIDs(platformID, CL.CL_DEVICE_TYPE_ALL, deviceIDs.length, deviceIDs, 0, null, 0);
if(CL.CL_SUCCESS != ret)
throw new CLException(ret, "error while enumerating devices");
CLDevice[] devices = new CLDevice[deviceIDs.length];
//print device info
for (int i = 0; i < deviceIDs.length; i++)
devices[i] = new CLDevice(cl, deviceIDs[i]);
return devices;
}
/**
* Returns the platform name.
*/
public String getName() {
return getInfoString(CL.CL_PLATFORM_NAME);
}
/**
* Returns the platform version.
*/
public String getVersion() {
return getInfoString(CL.CL_PLATFORM_VERSION);
}
/**
* Returns the platform profile.
*/
public String getProfile() {
return getInfoString(CL.CL_PLATFORM_PROFILE);
}
/**
* Returns the platform vendor.
*/
public String getVendor() {
return getInfoString(CL.CL_PLATFORM_VENDOR);
}
/**
* Returns a info string in exchange for a key (CL_PLATFORM_*).
*/
public String getInfoString(int key) {
long[] longBuffer = new long[1];
ByteBuffer bb = ByteBuffer.allocate(512);
int ret = cl.clGetPlatformInfo(platformID, key, bb.capacity(), bb, longBuffer, 0);
if(CL.CL_SUCCESS != ret)
throw new CLException(ret, "can not receive info string");
return new String(bb.array(), 0, (int)longBuffer[0]);
}
@Override
public String toString() {
return "CLPlatform [name:" + getName()
+" vendor:"+getVendor()
+" profile:"+getProfile()
+" version:"+getVersion()+"]";
}
}
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