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, 3 insertions, 4 deletions

diff --git a/lib/libc_r/uthread/uthread_fstat.c b/lib/libc_r/uthread/uthread_fstat.c
index 7fc64e4..e0698e1 100644
--- a/lib/libc_r/uthread/uthread_fstat.c
+++ b/lib/libc_r/uthread/uthread_fstat.c
@@ -37,10 +37,11 @@
 #include <sys/param.h>
 #include <sys/mount.h>
 #include <sys/stat.h>
-#ifdef _THREAD_SAFE
 #include <pthread.h>
 #include "pthread_private.h"
 
+#pragma weak	fstat=_fstat
+
 int
 _fstat(int fd, struct stat * buf)
 {
@@ -49,12 +50,10 @@ _fstat(int fd, struct stat * buf)
 	/* Lock the file descriptor for read: */
 	if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
 		/* Get the file status: */
-		ret = _thread_sys_fstat(fd, buf);
+		ret = __sys_fstat(fd, buf);
 		/* Unlock the file descriptor: */
 		_FD_UNLOCK(fd, FD_READ);
 	}
 	return (ret);
 }
 
-__strong_reference(_fstat, fstat);
-#endif