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; f()16void f() 17 { 18 int count =max_count; 19 while (count--) 20 { 21 upgrade_lock<shared_mutex> lock(mtx); 22 } 23 } 24 g()25void g() 26 { 27 int count =max_count; 28 while (count--) 29 { 30 shared_lock<shared_mutex> lock(mtx); 31 } 32 } 33 h()34void h() 35 { 36 int count =max_count; 37 while (count--) 38 { 39 unique_lock<shared_mutex> lock(mtx); 40 } 41 } 42 main()43int 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