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, 2 insertions, 4 deletions

diff --git a/lib/libc_r/uthread/uthread_signal.c b/lib/libc_r/uthread/uthread_signal.c
index ff4ce88..32f572a 100644
--- a/lib/libc_r/uthread/uthread_signal.c
+++ b/lib/libc_r/uthread/uthread_signal.c
@@ -32,12 +32,11 @@
  * $FreeBSD$
  */
 #include <signal.h>
-#ifdef _THREAD_SAFE
 #include <pthread.h>
 #include "pthread_private.h"
 
 sig_t
-_thread_sys_signal(int s, sig_t a)
+__sys_signal(int s, sig_t a)
 {
 	struct sigaction sa;
 	struct sigaction osa;
@@ -48,11 +47,10 @@ _thread_sys_signal(int s, sig_t a)
 	sa.sa_flags = SA_SIGINFO;
 
 	/* Perform the sigaction syscall: */
-	if (_thread_sys_sigaction(s, &sa, &osa) < 0) {
+	if (__sys_sigaction(s, &sa, &osa) < 0) {
 		/* Return an error: */
 		return (SIG_ERR);
 	}
 	/* Return a pointer to the old signal handler: */
 	return (osa.sa_handler);
 }
-#endif