| /* $Id$ |
| * |
| */ |
| /* $Log: /pjproject-0.3/pjlib/include/pj/compat/rand.h $ |
| * |
| * 3 10/14/05 12:26a Bennylp |
| * Finished error code framework, some fixes in ioqueue, etc. Pretty |
| * major. |
| * |
| * 2 9/21/05 1:39p Bennylp |
| * Periodic checkin for backup. |
| * |
| * 1 9/17/05 10:36a Bennylp |
| * Created. |
| * |
| */ |
| #ifndef __PJ_COMPAT_RAND_H__ |
| #define __PJ_COMPAT_RAND_H__ |
| |
| /** |
| * @file rand.h |
| * @brief Provides platform_rand() and platform_srand() functions. |
| */ |
| |
| #if defined(PJ_HAS_STDLIB_H) && PJ_HAS_STDLIB_H != 0 |
| /* |
| * Use stdlib based rand() and srand(). |
| */ |
| # include <stdlib.h> |
| # define platform_srand srand |
| # if defined(RAND_MAX) && RAND_MAX <= 0xFFFF |
| /* |
| * When rand() is only 16 bit strong, double the strength |
| * by calling it twice! |
| */ |
| PJ_INLINE(int) platform_rand(void) |
| { |
| return ((rand() & 0xFFFF) << 16) | (rand() & 0xFFFF); |
| } |
| # else |
| # define platform_rand rand |
| # endif |
| |
| #elif defined(PJ_LINUX_KERNEL) && PJ_LINUX_KERNEL != 0 |
| /* |
| * Linux kernel mode random number generator. |
| */ |
| # include <linux/random.h> |
| # define platform_srand(seed) |
| |
| PJ_INLINE(int) platform_rand(void) |
| { |
| int value; |
| get_random_bytes((void*)&value, sizeof(value)); |
| return value; |
| } |
| |
| #else |
| # warning "platform_rand() is not implemented" |
| # define platform_rand() 1 |
| # define platform_srand(seed) |
| |
| #endif |
| |
| |
| #endif /* __PJ_COMPAT_RAND_H__ */ |
| |