99a2dd955f
There is no reason for the DPDK libraries to all have 'librte_' prefix on the directory names. This prefix makes the directory names longer and also makes it awkward to add features referring to individual libraries in the build - should the lib names be specified with or without the prefix. Therefore, we can just remove the library prefix and use the library's unique name as the directory name, i.e. 'eal' rather than 'librte_eal' Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
75 lines
1.4 KiB
C
75 lines
1.4 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
|
|
* Copyright(c) 2010-2014 Intel Corporation
|
|
*/
|
|
|
|
#ifndef _RTE_RANDOM_H_
|
|
#define _RTE_RANDOM_H_
|
|
|
|
/**
|
|
* @file
|
|
*
|
|
* Pseudo-random Generators in RTE
|
|
*/
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <rte_compat.h>
|
|
|
|
/**
|
|
* Seed the pseudo-random generator.
|
|
*
|
|
* The generator is automatically seeded by the EAL init with a timer
|
|
* value. It may need to be re-seeded by the user with a real random
|
|
* value.
|
|
*
|
|
* This function is not multi-thread safe in regards to other
|
|
* rte_srand() calls, nor is it in relation to concurrent rte_rand()
|
|
* calls.
|
|
*
|
|
* @param seedval
|
|
* The value of the seed.
|
|
*/
|
|
void
|
|
rte_srand(uint64_t seedval);
|
|
|
|
/**
|
|
* Get a pseudo-random value.
|
|
*
|
|
* The generator is not cryptographically secure.
|
|
*
|
|
* If called from lcore threads, this function is thread-safe.
|
|
*
|
|
* @return
|
|
* A pseudo-random value between 0 and (1<<64)-1.
|
|
*/
|
|
uint64_t
|
|
rte_rand(void);
|
|
|
|
/**
|
|
* Generates a pseudo-random number with an upper bound.
|
|
*
|
|
* This function returns an uniformly distributed (unbiased) random
|
|
* number less than a user-specified maximum value.
|
|
*
|
|
* If called from lcore threads, this function is thread-safe.
|
|
*
|
|
* @param upper_bound
|
|
* The upper bound of the generated number.
|
|
* @return
|
|
* A pseudo-random value between 0 and (upper_bound-1).
|
|
*/
|
|
__rte_experimental
|
|
uint64_t
|
|
rte_rand_max(uint64_t upper_bound);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
|
|
#endif /* _RTE_RANDOM_H_ */
|