Block signals while pthread exits.

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@170 42af7a65-404d-4744-a932-0658087f49c3

sched/pthread_exit.c

@@ -40,6 +40,7 @@
 #include <sys/types.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <signal.h>
 #include <pthread.h>
 #include <errno.h>
 #include <debug.h>
@@ -93,6 +94,17 @@ void pthread_exit(FAR void *exit_value)
 
   dbg("exit_value=%p\n", exit_value);
 
+  /* Block any signal actions that would awaken us while were
+   * are performing the JOIN handshake.
+   */
+
+#ifndef CONFIG_DISABLE_SIGNALS
+  {
+    sigset_t set = ALL_SIGNAL_SET;
+    (void)sigprocmask(SIG_SETMASK, &set, NULL);
+  }
+#endif
+
   /* Complete pending join operations */
 
   status = pthread_completejoin(getpid(), exit_value);