1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
// Copyright (C) 2014 Vicente Botet
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#define BOOST_THREAD_VERSION 4
#include <boost/thread/shared_mutex.hpp>
#include <thread>
#include <mutex>
#include <shared_mutex>
#include <atomic>
#include <vector>
using MutexT = boost::shared_mutex;
using ReaderLockT = std::lock_guard<MutexT>;
using WriterLockT = std::shared_lock<MutexT>;
MutexT gMutex;
std::atomic<bool> running(true);
void myread()
{
long reads = 0;
while (running && reads < 100000)
{
ReaderLockT lock(gMutex);
std::this_thread::yield();
++reads;
}
}
int main()
{
using namespace std;
vector<thread> threads;
for (int i = 0; i < 256; ++i)
{
threads.emplace_back(thread(myread));
}
// string str;
//
// getline(std::cin, str);
running = false;
for (auto& thread : threads)
{
thread.join();
}
return 0;
}
|
