private int rubyPriorityToJavaPriority(int rubyPriority) {
double d;
if (rubyPriority < RUBY_MIN_THREAD_PRIORITY) {
rubyPriority = RUBY_MIN_THREAD_PRIORITY;
} else if (rubyPriority > RUBY_MAX_THREAD_PRIORITY) {
rubyPriority = RUBY_MAX_THREAD_PRIORITY;
}
d = Math.pow(rubyPriority, 2.0) / 18.0 + 1.5 * rubyPriority + 5;
return Math.round((float) d);
}
private int writeInternal(ThreadContext context, IRubyObject arg) {
checkWritable();
checkFrozen();
RubyString val = arg.asString();
data.internal.modify();
if (data.modes.isAppendable()) {
data.internal.getByteList().append(val.getByteList());
data.pos = data.internal.getByteList().length();
} else {
int left = data.internal.getByteList().length() - (int) data.pos;
data.internal
.getByteList()
.replace((int) data.pos, Math.min(val.getByteList().length(), left), val.getByteList());
data.pos += val.getByteList().length();
}
if (val.isTaint()) {
data.internal.setTaint(true);
}
return val.getByteList().length();
}
@JRubyMethod(name = "join", optional = 1)
public IRubyObject join(IRubyObject[] args) {
Ruby runtime = getRuntime();
long timeoutMillis = Long.MAX_VALUE;
if (args.length > 0 && !args[0].isNil()) {
if (args.length > 1) {
throw getRuntime().newArgumentError(args.length, 1);
}
// MRI behavior: value given in seconds; converted to Float; less
// than or equal to zero returns immediately; returns nil
timeoutMillis = (long) (1000.0D * args[0].convertToFloat().getValue());
if (timeoutMillis <= 0) {
// TODO: not sure that we should skip calling join() altogether.
// Thread.join() has some implications for Java Memory Model, etc.
if (threadImpl.isAlive()) {
return getRuntime().getNil();
} else {
return this;
}
}
}
if (isCurrent()) {
throw getRuntime().newThreadError("thread " + identityString() + " tried to join itself");
}
try {
if (runtime.getThreadService().getCritical()) {
// If the target thread is sleeping or stopped, wake it
synchronized (this) {
notify();
}
// interrupt the target thread in case it's blocking or waiting
// WARNING: We no longer interrupt the target thread, since this usually means
// interrupting IO and with NIO that means the channel is no longer usable.
// We either need a new way to handle waking a target thread that's waiting
// on IO, or we need to accept that we can't wake such threads and must wait
// for them to complete their operation.
// threadImpl.interrupt();
}
RubyThread currentThread = getRuntime().getCurrentContext().getThread();
final long timeToWait = Math.min(timeoutMillis, 200);
// We need this loop in order to be able to "unblock" the
// join call without actually calling interrupt.
long start = System.currentTimeMillis();
while (true) {
currentThread.pollThreadEvents();
threadImpl.join(timeToWait);
if (!threadImpl.isAlive()) {
break;
}
if (System.currentTimeMillis() - start > timeoutMillis) {
break;
}
}
} catch (InterruptedException ie) {
ie.printStackTrace();
assert false : ie;
} catch (ExecutionException ie) {
ie.printStackTrace();
assert false : ie;
}
if (exitingException != null) {
// Set $! in the current thread before exiting
getRuntime().getGlobalVariables().set("$!", (IRubyObject) exitingException.getException());
throw exitingException;
}
if (threadImpl.isAlive()) {
return getRuntime().getNil();
} else {
return this;
}
}
/* helper methods to translate java thread priority (1-10) to
* Ruby thread priority (-3 to 3) using a quadratic polynoimal ant its
* inverse
* i.e., j = r^2/18 + 3*r/2 + 5
* r = 3/2*sqrt(8*j + 41) - 27/2
*/
private int javaPriorityToRubyPriority(int javaPriority) {
double d; // intermediate value
d = 1.5 * Math.sqrt(8.0 * javaPriority + 41) - 13.5;
return Math.round((float) d);
}
