Benny Prijono | 4766ffe | 2005-11-01 17:56:59 +0000 | [diff] [blame^] | 1 | /* $Id$ |
| 2 | * |
| 3 | */ |
Benny Prijono | dd859a6 | 2005-11-01 16:42:51 +0000 | [diff] [blame] | 4 | /* $Log: /pjproject-0.3/pjlib/include/pj/compat/rand.h $ |
| 5 | * |
| 6 | * 3 10/14/05 12:26a Bennylp |
| 7 | * Finished error code framework, some fixes in ioqueue, etc. Pretty |
| 8 | * major. |
| 9 | * |
| 10 | * 2 9/21/05 1:39p Bennylp |
| 11 | * Periodic checkin for backup. |
| 12 | * |
| 13 | * 1 9/17/05 10:36a Bennylp |
| 14 | * Created. |
| 15 | * |
| 16 | */ |
| 17 | #ifndef __PJ_COMPAT_RAND_H__ |
| 18 | #define __PJ_COMPAT_RAND_H__ |
| 19 | |
| 20 | /** |
| 21 | * @file rand.h |
| 22 | * @brief Provides platform_rand() and platform_srand() functions. |
| 23 | */ |
| 24 | |
| 25 | #if defined(PJ_HAS_STDLIB_H) && PJ_HAS_STDLIB_H != 0 |
| 26 | /* |
| 27 | * Use stdlib based rand() and srand(). |
| 28 | */ |
| 29 | # include <stdlib.h> |
| 30 | # define platform_srand srand |
| 31 | # if defined(RAND_MAX) && RAND_MAX <= 0xFFFF |
| 32 | /* |
| 33 | * When rand() is only 16 bit strong, double the strength |
| 34 | * by calling it twice! |
| 35 | */ |
| 36 | PJ_INLINE(int) platform_rand(void) |
| 37 | { |
| 38 | return ((rand() & 0xFFFF) << 16) | (rand() & 0xFFFF); |
| 39 | } |
| 40 | # else |
| 41 | # define platform_rand rand |
| 42 | # endif |
| 43 | |
| 44 | #elif defined(PJ_LINUX_KERNEL) && PJ_LINUX_KERNEL != 0 |
| 45 | /* |
| 46 | * Linux kernel mode random number generator. |
| 47 | */ |
| 48 | # include <linux/random.h> |
| 49 | # define platform_srand(seed) |
| 50 | |
| 51 | PJ_INLINE(int) platform_rand(void) |
| 52 | { |
| 53 | int value; |
| 54 | get_random_bytes((void*)&value, sizeof(value)); |
| 55 | return value; |
| 56 | } |
| 57 | |
| 58 | #else |
| 59 | # warning "platform_rand() is not implemented" |
| 60 | # define platform_rand() 1 |
| 61 | # define platform_srand(seed) |
| 62 | |
| 63 | #endif |
| 64 | |
| 65 | |
| 66 | #endif /* __PJ_COMPAT_RAND_H__ */ |
| 67 | |