- 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, 14 insertions, 1 deletions

diff --git a/lib/libpthread/thread/thread_malloc_lock.c b/lib/libpthread/thread/thread_malloc_lock.c
index 6e8b96bb656..6deebb53f66 100644
--- a/lib/libpthread/thread/thread_malloc_lock.c
+++ b/lib/libpthread/thread/thread_malloc_lock.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: thread_malloc_lock.c,v 1.5 2006/02/22 07:16:32 otto Exp $ */
+/* $OpenBSD: thread_malloc_lock.c,v 1.6 2008/01/01 00:43:39 kurt Exp $ */
 /* Public Domain <marc@snafu.org> */
 
 #include <pthread.h>
@@ -6,6 +6,7 @@
 
 static spinlock_t malloc_lock = _SPINLOCK_INITIALIZER;
 static spinlock_t atexit_lock = _SPINLOCK_INITIALIZER;
+static spinlock_t arc4_lock = _SPINLOCK_INITIALIZER;
 
 void
 _thread_malloc_lock()
@@ -35,3 +36,15 @@ _thread_atexit_unlock()
 {
 	_SPINUNLOCK(&atexit_lock);
 }
+
+void
+_thread_arc4_lock()
+{
+	_SPINLOCK(&arc4_lock);
+}
+
+void
+_thread_arc4_unlock()
+{
+	_SPINUNLOCK(&arc4_lock);
+}