Revamp libpthread so that it has a chance of working in an SMP

environment.  This includes support for multiple KSEs and KSEGs.

The ability to create more than 1 KSE via pthread_setconcurrency()
is in the works as well as support for PTHREAD_SCOPE_SYSTEM threads.
Those should come shortly.

There are still some known issues which davidxu and I are working
on, but it'll make it easier for us by committing what we have.

This library now passes all of the ACE tests that libc_r passes
with the exception of one.  It also seems to work OK with KDE
including konqueror, kwrite, etc.  I haven't been able to get
mozilla to run due to lack of java plugin, so I'd be interested
to see how it works with that.

Reviewed by:	davidxu

1 files changed, 20 insertions, 2 deletions

diff --git a/lib/libkse/thread/thr_kill.c b/lib/libkse/thread/thr_kill.c
index 24f9150..19f34bb 100644
--- a/lib/libkse/thread/thr_kill.c
+++ b/lib/libkse/thread/thr_kill.c
@@ -41,8 +41,26 @@ __weak_reference(_pthread_kill, pthread_kill);
 int
 _pthread_kill(pthread_t pthread, int sig)
 {
+	struct pthread *curthread = _get_curthread();
+	int ret;
+
+	/* Check for invalid signal numbers: */
+	if (sig < 0 || sig >= NSIG)
+		/* Invalid signal: */
+		ret = EINVAL;
 	/*
-	 * All signals are unsupported.
+	 * Ensure the thread is in the list of active threads, and the
+	 * signal is valid (signal 0 specifies error checking only) and
+	 * not being ignored:
 	 */
-	return (EINVAL);
+	else if ((ret = _thr_ref_add(curthread, pthread, /*include dead*/0))
+	    == 0) {
+		if ((sig > 0) &&
+		    (_thread_sigact[sig - 1].sa_handler != SIG_IGN))
+			_thr_sig_send(pthread, sig);
+		_thr_ref_delete(curthread, pthread);
+	}
+
+	/* Return the completion status: */
+	return (ret);
 }