/** Returns the context of this program */
public synchronized CLProgram build() throws CLBuildException {
if (built) throw new IllegalThreadStateException("Program was already built !");
String contentSignature = null;
File cacheFile = null;
boolean readBinaries = false;
if (isCached()) {
try {
contentSignature = computeCacheSignature();
byte[] sha =
java.security.MessageDigest.getInstance("MD5")
.digest(contentSignature.getBytes(textEncoding));
StringBuilder shab = new StringBuilder();
for (byte b : sha) shab.append(Integer.toHexString(b & 0xff));
String hash = shab.toString();
cacheFile = new File(JavaCL.userCacheDir, hash);
if (cacheFile.exists()) {
Pair<Map<CLDevice, byte[]>, String> bins =
readBinaries(
Arrays.asList(getDevices()), contentSignature, new FileInputStream(cacheFile));
setBinaries(bins.getFirst());
this.source = bins.getSecond();
assert log(Level.INFO, "Read binaries cache from '" + cacheFile + "'");
readBinaries = true;
}
} catch (Exception ex) {
assert log(Level.WARNING, "Failed to load cached program", ex);
entity = null;
}
}
if (entity == null) allocate();
Runnable deleteTempFiles = null;
if (!readBinaries)
try {
deleteTempFiles = copyIncludesToTemporaryDirectory();
} catch (IOException ex) {
throw new CLBuildException(this, ex.toString(), Collections.EMPTY_LIST);
}
int nDevices = devices.length;
cl_device_id[] deviceIds = null;
if (nDevices != 0) {
deviceIds = new cl_device_id[nDevices];
for (int i = 0; i < nDevices; i++) deviceIds[i] = devices[i].getEntity();
}
int err =
CL.clBuildProgram(
getEntity(), nDevices, deviceIds, readBinaries ? null : getOptionsString(), null, null);
// int err = CL.clBuildProgram(getEntity(), 0, null, getOptionsString(), null, null);
if (err != CL_SUCCESS) { // BUILD_PROGRAM_FAILURE) {
NativeSizeByReference len = new NativeSizeByReference();
int bufLen = 2048 * 32; // TODO find proper size
Memory buffer = new Memory(bufLen);
HashSet<String> errs = new HashSet<String>();
if (deviceIds == null) {
error(
CL.clGetProgramBuildInfo(
getEntity(), null, CL_PROGRAM_BUILD_LOG, toNS(bufLen), buffer, len));
String s = buffer.getString(0);
errs.add(s);
} else
for (cl_device_id device : deviceIds) {
error(
CL.clGetProgramBuildInfo(
getEntity(), device, CL_PROGRAM_BUILD_LOG, toNS(bufLen), buffer, len));
String s = buffer.getString(0);
errs.add(s);
}
throw new CLBuildException(this, "Compilation failure : " + errorString(err), errs);
}
built = true;
if (deleteTempFiles != null) deleteTempFiles.run();
if (isCached() && !readBinaries) {
JavaCL.userCacheDir.mkdirs();
try {
Map<CLDevice, byte[]> binaries = getBinaries();
if (!binaries.isEmpty()) {
writeBinaries(
getBinaries(), getSource(), contentSignature, new FileOutputStream(cacheFile));
assert log(Level.INFO, "Wrote binaries cache to '" + cacheFile + "'");
}
} catch (Exception ex) {
new IOException("[JavaCL] Failed to cache program", ex).printStackTrace();
}
}
return this;
}
