o Don't add a scope system thread's KSE to the list of available

  KSEs when it's thread exits; allow the GC handler to do that.

o Make spinlock/spinlock critical regions.

The following were submitted by davidxu

  o Alow thr_switch() to take a null mailbox argument.

  o Better protect cancellation checks.

  o Don't set KSE specific data when creating new KSEs; rely on the
    first upcall of the KSE to set it.

  o Add the ability to set the maximum concurrency level and do this
    automatically.  We should have a way to enable/disable this with
    some sort of tunable because some applications may not want this
    to be the default.

  o Hold the scheduling lock across thread switch calls.

  o If scheduling of a thread fails, make sure to remove it from the list
    of active threads.

  o Better protect accesses to a joining threads when the target thread is
    exited and detached.

  o Remove some macro definitions that are now provided by <sys/kse.h>.

  o Don't leave the library in threaded mode if creation of the initial
    KSE fails.

  o Wakeup idle KSEs when there are threads ready to run.

  o Maintain the number of threads active in the priority queue.

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/libpthread/thread/thr_sigsuspend.c b/lib/libpthread/thread/thr_sigsuspend.c
index 7ce027a..9ada1b2 100644
--- a/lib/libpthread/thread/thr_sigsuspend.c
+++ b/lib/libpthread/thread/thr_sigsuspend.c
@@ -53,13 +53,14 @@ _sigsuspend(const sigset_t *set)
 		memcpy(&curthread->tmbx.tm_context.uc_sigmask,
 		    set, sizeof(sigset_t));
 
+		THR_LOCK_SWITCH(curthread);
 		THR_SET_STATE(curthread, PS_SIGSUSPEND);
 
-		THR_SCHED_UNLOCK(curthread, curthread);
-
 		/* Wait for a signal: */
 		_thr_sched_switch(curthread);
 
+		THR_UNLOCK_SWITCH(curthread);
+
 		/* Always return an interrupted error: */
 		errno = EINTR;