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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/lib/common/rand.h $ */
/* */
/* OpenPOWER OnChipController Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2015 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#ifndef __RAND_H__
#define __RAND_H__
// $Id$
/// \file rand.h
/// \brief Random number generation
#include <stdint.h>
// Error/Panic codes
#define RAND64_UNIMPLEMENTED 0x00726301
/// RAND32_ALL is used as the \a limit argument to rand32() and _rand32() to
/// request the return of a full 32-bit random unsigned integer.
#define RAND32_ALL 0
extern uint32_t _seed32;
uint32_t
_rand32(uint32_t *seed, uint32_t limit);
uint32_t
rand32(uint32_t limit);
void
srand32(uint32_t seed);
/// RAND64_ALL is used as the \a limit argument to rand64() and _rand64() to
/// request the return of a full 64-bit random unsigned integer.
#define RAND64_ALL 0
extern uint64_t _seed64;
//void
//davidmult64to128(uint64_t u, uint64_t v, uint64_t &h, uint64_t &l);
uint64_t
_rand64(uint64_t *seed, uint64_t limit);
uint64_t
rand64(uint64_t limit);
void
srand64(uint64_t seed);
/// A random weighting map for integer selections
///
/// See rand_map_int() for details.
typedef struct {
/// The relative weight of this selection
///
/// The final weight of the map array \e must be 0 to terminate the map.
unsigned weight;
/// The selection
int selection;
} RandMapInt;
/// A random weighting map for pointer selections
///
/// See rand_map_ptr() for details.
typedef struct {
/// The relative weight of this selection
///
/// The final weight of the map array \e must be 0 to terminate the map.
unsigned weight;
/// The selection
void *selection;
} RandMapPtr;
int
_rand_map_int(uint32_t *seed, RandMapInt *map, int *index);
int
rand_map_int(RandMapInt *map);
void *
_rand_map_ptr(uint32_t *seed, RandMapPtr *map, int *index);
void *
rand_map_ptr(RandMapPtr *map);
#endif /* __RAND_H__ */
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