- make arc4random*() functions thread safe. Use a custom spinlock function

instead of the generic pthread macros since free(3) uses __arc4_getbyte()
when freeing small sized allocations and the generic pthread macros call
malloc(3).
- eliminate passing pointers to a static variable with global scope (rs)
for additional code clarity and reduction.
- shlib minor bumps for libc and libpthread due to new functions.
From andreas@ with some bits from me. okay tedu@ marc@ w/some spot
checking from millert@

1 files changed, 13 insertions, 1 deletions

diff --git a/src/lib/libc/include/thread_private.h b/src/lib/libc/include/thread_private.h
index 146f0b0a01..f55880f7ba 100644
--- a/src/lib/libc/include/thread_private.h
+++ b/src/lib/libc/include/thread_private.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: thread_private.h,v 1.21 2007/11/19 02:54:19 kurt Exp $ */
+/* $OpenBSD: thread_private.h,v 1.22 2008/01/01 00:43:39 kurt Exp $ */
 
 /* PUBLIC DOMAIN: No Rights Reserved. Marco S Hyman <marc@snafu.org> */
 
@@ -150,4 +150,16 @@ void	_thread_atexit_unlock(void);
                                                 _thread_atexit_unlock();\
                                 } while (0)
 
+void    _thread_arc4_lock(void);
+void    _thread_arc4_unlock(void);
+
+#define _ARC4_LOCK()            do {                                    \
+                                        if (__isthreaded)               \
+                                                _thread_arc4_lock();    \
+                                } while (0)
+#define _ARC4_UNLOCK()          do {                                    \
+                                        if (__isthreaded)               \
+                                                _thread_arc4_unlock();\
+                                } while (0)
+
 #endif /* _THREAD_PRIVATE_H_ */