summaryrefslogtreecommitdiffstats
path: root/gnu/llvm/compiler-rt/lib/gwp_asan/random.h
blob: 953b98909e958bbd39d20b10e972dfdbd291e46a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
//===-- random.h ------------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef GWP_ASAN_RANDOM_H_
#define GWP_ASAN_RANDOM_H_

#include <stdint.h>

namespace gwp_asan {
// Initialise the PRNG, using time and thread ID as the seed.
void initPRNG();

// xorshift (32-bit output), extremely fast PRNG that uses arithmetic operations
// only. Seeded using walltime.
uint32_t getRandomUnsigned32();
} // namespace gwp_asan

#endif // GWP_ASAN_RANDOM_H_