xref: /unit/src/nxt_random.h (revision 0)
1*0Sigor@sysoev.ru 
2*0Sigor@sysoev.ru /*
3*0Sigor@sysoev.ru  * Copyright (C) Igor Sysoev
4*0Sigor@sysoev.ru  * Copyright (C) NGINX, Inc.
5*0Sigor@sysoev.ru  */
6*0Sigor@sysoev.ru 
7*0Sigor@sysoev.ru #ifndef _NXT_RANDOM_H_INCLUDED_
8*0Sigor@sysoev.ru #define _NXT_RANDOM_H_INCLUDED_
9*0Sigor@sysoev.ru 
10*0Sigor@sysoev.ru 
11*0Sigor@sysoev.ru #if (NXT_HAVE_ARC4RANDOM)
12*0Sigor@sysoev.ru 
13*0Sigor@sysoev.ru /*
14*0Sigor@sysoev.ru  * arc4random() has been introduced in OpenBSD 2.1 and then was ported
15*0Sigor@sysoev.ru  * to FreeBSD 2.2.6, NetBSD 2.0, MacOSX and SmartOS.
16*0Sigor@sysoev.ru  *
17*0Sigor@sysoev.ru  * arc4random() automatically initializes itself in the first call and
18*0Sigor@sysoev.ru  * then reinitializes itself in the first call in every forked processes.
19*0Sigor@sysoev.ru  */
20*0Sigor@sysoev.ru 
21*0Sigor@sysoev.ru typedef void  *nxt_random_t;
22*0Sigor@sysoev.ru 
23*0Sigor@sysoev.ru 
24*0Sigor@sysoev.ru #define nxt_random_init(r)
25*0Sigor@sysoev.ru #define nxt_random(r)       arc4random()
26*0Sigor@sysoev.ru 
27*0Sigor@sysoev.ru #else
28*0Sigor@sysoev.ru 
29*0Sigor@sysoev.ru typedef struct {
30*0Sigor@sysoev.ru     uint8_t  i;
31*0Sigor@sysoev.ru     uint8_t  j;
32*0Sigor@sysoev.ru     uint8_t  s[256];
33*0Sigor@sysoev.ru     int32_t  count;
34*0Sigor@sysoev.ru } nxt_random_t;
35*0Sigor@sysoev.ru 
36*0Sigor@sysoev.ru 
37*0Sigor@sysoev.ru void nxt_random_init(nxt_random_t *r);
38*0Sigor@sysoev.ru uint32_t nxt_random(nxt_random_t *r);
39*0Sigor@sysoev.ru 
40*0Sigor@sysoev.ru #if (NXT_LIB_UNIT_TEST)
41*0Sigor@sysoev.ru nxt_int_t nxt_random_unit_test(nxt_thread_t *thr);
42*0Sigor@sysoev.ru #endif
43*0Sigor@sysoev.ru 
44*0Sigor@sysoev.ru #endif
45*0Sigor@sysoev.ru 
46*0Sigor@sysoev.ru 
47*0Sigor@sysoev.ru #endif /* _NXT_RANDOM_H_INCLUDED_ */
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