improve design of thread-start with explicit scheduling attributes

eliminate the awkward startlock mechanism and corresponding fields of
the pthread structure that were only used at startup.

instead of having pthread_create perform the scheduling operations and
having the new thread wait for them to be completed, start the new
thread with a wrapper start function that performs its own scheduling,
sending the result code back via a futex. this way the new thread can
use storage from the calling thread's stack rather than permanent
fields in the pthread structure.

1 files changed, 0 insertions, 2 deletions

diff --git a/src/internal/pthread_impl.h b/src/internal/pthread_impl.h
index fc2def63..69352ef2 100644
--- a/src/internal/pthread_impl.h
+++ b/src/internal/pthread_impl.h
@@ -47,8 +47,6 @@ struct pthread {
 	volatile int timer_id;
 	locale_t locale;
 	volatile int killlock[1];
-	volatile int startlock[1];
-	unsigned long sigmask[_NSIG/8/sizeof(long)];
 	char *dlerror_buf;
 	void *stdio_locks;