Add weak definitions for wrapped system calls. In general:

	_foo - wrapped system call
	foo - weak definition to _foo

and for cancellation points:

	_foo - wrapped system call
	__foo - enter cancellation point, call _foo(), leave
	        cancellation point
	foo - weak definition to __foo

Change use of global _thread_run to call a function to get the
currently running thread.

Make all pthread_foo functions weak definitions to _pthread_foo,
where _pthread_foo is the implementation.  This allows an application
to provide its own pthread functions.

Provide slightly different versions of pthread_mutex_lock and
pthread_mutex_init so that we can tell the difference between
a libc mutex and an application mutex.  Threads holding mutexes
internal to libc should never be allowed to exit, call signal
handlers, or cancel.

Approved by:	-arch

1 files changed, 4 insertions, 5 deletions

diff --git a/lib/libpthread/thread/thr_sigpending.c b/lib/libpthread/thread/thr_sigpending.c
index a118347..98b7d26 100644
--- a/lib/libpthread/thread/thr_sigpending.c
+++ b/lib/libpthread/thread/thr_sigpending.c
@@ -33,13 +33,15 @@
  */
 #include <signal.h>
 #include <errno.h>
-#ifdef _THREAD_SAFE
 #include <pthread.h>
 #include "pthread_private.h"
 
+#pragma weak	sigpending=_sigpending
+
 int
 _sigpending(sigset_t * set)
 {
+	struct pthread	*curthread = _get_curthread();
 	int ret = 0;
 
 	/* Check for a null signal set pointer: */
@@ -48,11 +50,8 @@ _sigpending(sigset_t * set)
 		ret = EINVAL;
 	}
 	else {
-		*set = _thread_run->sigpend;
+		*set = curthread->sigpend;
 	}
 	/* Return the completion status: */
 	return (ret);
 }
-
-__strong_reference(_sigpending, sigpending);
-#endif