| 1 | // Copyright 2023 Peter Dimov |
|---|---|
| 2 | // Distributed under the Boost Software License, Version 1.0. |
| 3 | // https://www.boost.org/LICENSE_1_0.txt |
| 4 | |
| 5 | #include <boost/unordered/detail/foa/rw_spinlock.hpp> |
| 6 | #include <boost/core/lightweight_test.hpp> |
| 7 | #include <mutex> |
| 8 | #include <thread> |
| 9 | #include <cstdio> |
| 10 | |
| 11 | using boost::unordered::detail::foa::rw_spinlock; |
| 12 | |
| 13 | static int count = 0; |
| 14 | static rw_spinlock sp; |
| 15 | |
| 16 | void f( int k, int n ) |
| 17 | { |
| 18 | std::printf( format: "Thread %d started.\n", k ); |
| 19 | |
| 20 | for( int i = 0; i < n; ++i ) |
| 21 | { |
| 22 | std::lock_guard<rw_spinlock> lock( sp ); |
| 23 | ++count; |
| 24 | } |
| 25 | |
| 26 | std::printf( format: "Thread %d finished.\n", k ); |
| 27 | } |
| 28 | |
| 29 | int main() |
| 30 | { |
| 31 | int const N = 1000000; // iterations |
| 32 | int const M = 8; // threads |
| 33 | |
| 34 | std::thread th[ M ]; |
| 35 | |
| 36 | for( int i = 0; i < M; ++i ) |
| 37 | { |
| 38 | th[ i ] = std::thread( f, i, N ); |
| 39 | } |
| 40 | |
| 41 | for( int i = 0; i < M; ++i ) |
| 42 | { |
| 43 | th[ i ].join(); |
| 44 | } |
| 45 | |
| 46 | BOOST_TEST_EQ( count, N * M ); |
| 47 | |
| 48 | return boost::report_errors(); |
| 49 | } |
| 50 |