| 1 | // Copyright (C) 2013 Vicente Botet |
|---|---|
| 2 | // |
| 3 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 4 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 5 | |
| 6 | //////////////////////////////////////////// |
| 7 | |
| 8 | //#define BOOST_THREAD_PROVIDES_GENERIC_SHARED_MUTEX_ON_WIN |
| 9 | #include <boost/thread/thread_only.hpp> |
| 10 | #include <boost/thread/shared_mutex.hpp> |
| 11 | using namespace boost; |
| 12 | |
| 13 | shared_mutex mtx; |
| 14 | |
| 15 | const int max_count = 100; |
| 16 | void f() |
| 17 | { |
| 18 | int count =max_count; |
| 19 | while (count--) |
| 20 | { |
| 21 | upgrade_lock<shared_mutex> lock(mtx); |
| 22 | } |
| 23 | } |
| 24 | |
| 25 | void g() |
| 26 | { |
| 27 | int count =max_count; |
| 28 | while (count--) |
| 29 | { |
| 30 | shared_lock<shared_mutex> lock(mtx); |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | void h() |
| 35 | { |
| 36 | int count =max_count; |
| 37 | while (count--) |
| 38 | { |
| 39 | unique_lock<shared_mutex> lock(mtx); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | int main() |
| 44 | { |
| 45 | thread t0(f); |
| 46 | thread t1(g); |
| 47 | thread t2(h); |
| 48 | |
| 49 | t0.join(); |
| 50 | t1.join(); |
| 51 | t2.join(); |
| 52 | |
| 53 | return 0; |
| 54 | } |
| 55 | |
| 56 | |
| 57 |