mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-01-29 02:20:21 +08:00
030a762535
After using fork(), arc4random does not reseed itself, which
causes the results to become predictable. Activate droppingfork-recognition
Fixes: e0fc33322d50 ("Delete Cygwin's arc4random in favor of new Newlib implementation")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
40 lines
841 B
C
40 lines
841 B
C
/* machine/_arc4random.h
|
|
|
|
This file is part of Cygwin.
|
|
|
|
This software is a copyrighted work licensed under the terms of the
|
|
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
|
details. */
|
|
|
|
#ifndef _MACHINE_ARC4RANDOM_H
|
|
#define _MACHINE_ARC4RANDOM_H
|
|
|
|
extern int __isthreaded;
|
|
|
|
#define _ARC4_LOCK_INIT __LOCK_INIT(static, _arc4random_mutex);
|
|
|
|
#define _ARC4_LOCK() \
|
|
do { \
|
|
if (__isthreaded) \
|
|
__lock_acquire (_arc4random_mutex); \
|
|
} while (0)
|
|
|
|
#define _ARC4_UNLOCK() \
|
|
do { \
|
|
if (__isthreaded) \
|
|
__lock_release (_arc4random_mutex); \
|
|
} while (0)
|
|
|
|
static inline void
|
|
_arc4random_forkdetect(void)
|
|
{
|
|
extern int __in_forkee;
|
|
|
|
if (__in_forkee)
|
|
rs = NULL;
|
|
}
|
|
#define _ARC4RANDOM_FORKDETECT() _arc4random_forkdetect ()
|
|
|
|
__END_DECLS
|
|
#endif /* _MACHINE_ARC4RANDOM_H */
|