724(3): デフォルトの名無しさん [sage] 2011/11/18(金) 13:41:41.76 AAS
VC++2008でエラーになる・・・
boost.moveが原因くさい

#include <boost/unordered_map.hpp>

int main()
{
struct data_type
{
boost::unordered_map<int, int> a;
};

data_type a;
const data_type b;
a = b;

return 0;
}

841(1): デフォルトの名無しさん [sage] 2012/02/11(土) 16:10:52.17 AAS
待つだけでいいならミューテックスでもいいのでは…そういう話ではない…？
#include <iostream>
#include <boost/thread.hpp>
#include <unistd.h>
void f( boost::mutex* guard )
{
std::cout << "worker: working" << std::endl;
std::cout << "worker: waiting until the mutex was unlocked" << std::endl; guard->lock();
std::cout << "worker: finished" << std::endl; guard->unlock();
}
int main()
{
boost::mutex m;
std::cout << "main: lock a mutex" << std::endl; m.lock();
std::cout << "main: create a worker" << std::endl; boost::thread worker(&f,&m);
std::cout << "main: sleeping 3 seconds" << std::endl; sleep(3);
std::cout << "main: unlock the mutex" << std::endl; m.unlock();
std::cout << "main: waiting for join" << std::endl; worker.join();
std::cout << "main: finished" << std::endl;
return 0;
}

$ ./sample
main: lock a mutex
main: create a worker
main: sleeping 3 seconds
worker: working
worker: waiting until the mutex was unlocked
main: unlock the mutex
main: waiting for join
worker: finished
main: finished

961(1): デフォルトの名無しさん [sage] 2012/06/25(月) 23:15:27.12 AAS
所有権を持ってるインスタンスに返してもらえばいい