1 #ifndef CONDITION_TEST_COMMON_HPP 2 #define CONDITION_TEST_COMMON_HPP 3 // Copyright (C) 2007 Anthony Williams 4 // 5 // Distributed under the Boost Software License, Version 1.0. (See accompanying 6 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 7 8 #include <boost/thread/condition_variable.hpp> 9 #include <boost/thread/mutex.hpp> 10 #include <boost/thread/thread_time.hpp> 11 12 unsigned const timeout_seconds=5; 13 14 struct wait_for_flag 15 { 16 boost::mutex mutex; 17 boost::condition_variable cond_var; 18 bool flag; 19 unsigned woken; 20 wait_for_flagwait_for_flag21 wait_for_flag(): 22 flag(false),woken(0) 23 {} 24 25 struct check_flag 26 { 27 bool const& flag; 28 check_flagwait_for_flag::check_flag29 check_flag(bool const& flag_): 30 flag(flag_) 31 {} 32 operator ()wait_for_flag::check_flag33 bool operator()() const 34 { 35 return flag; 36 } 37 private: 38 void operator=(check_flag&); 39 }; 40 41 wait_without_predicatewait_for_flag42 void wait_without_predicate() 43 { 44 boost::unique_lock<boost::mutex> lock(mutex); 45 while(!flag) 46 { 47 cond_var.wait(lock); 48 } 49 ++woken; 50 } 51 wait_with_predicatewait_for_flag52 void wait_with_predicate() 53 { 54 boost::unique_lock<boost::mutex> lock(mutex); 55 cond_var.wait(lock,check_flag(flag)); 56 if(flag) 57 { 58 ++woken; 59 } 60 } 61 timed_wait_without_predicatewait_for_flag62 void timed_wait_without_predicate() 63 { 64 boost::system_time const timeout=boost::get_system_time()+boost::posix_time::seconds(timeout_seconds); 65 66 boost::unique_lock<boost::mutex> lock(mutex); 67 while(!flag) 68 { 69 if(!cond_var.timed_wait(lock,timeout)) 70 { 71 return; 72 } 73 } 74 ++woken; 75 } 76 timed_wait_with_predicatewait_for_flag77 void timed_wait_with_predicate() 78 { 79 boost::system_time const timeout=boost::get_system_time()+boost::posix_time::seconds(timeout_seconds); 80 boost::unique_lock<boost::mutex> lock(mutex); 81 if(cond_var.timed_wait(lock,timeout,check_flag(flag)) && flag) 82 { 83 ++woken; 84 } 85 } relative_timed_wait_with_predicatewait_for_flag86 void relative_timed_wait_with_predicate() 87 { 88 boost::unique_lock<boost::mutex> lock(mutex); 89 if(cond_var.timed_wait(lock,boost::posix_time::seconds(timeout_seconds),check_flag(flag)) && flag) 90 { 91 ++woken; 92 } 93 } 94 }; 95 96 97 #endif 98