timeout - 提升进程间匿名条件 timed_wait 不可编译

Question

我想知道我做错了什么......wait它编译和运行的鞋底，但不是timed_wait：

using boost::interprocess::scoped_lock;
using boost::interprocess::interprocess_mutex;
using boost::posix_time::milliseconds;

[...]

scoped_lock<interprocess_mutex> lock(obj->mutex);
while (...) {
   obj->condition.timed_wait(lock, milliseconds(100));
}

哪里obj->mutex是 aboost::interprocess::interprocess_mutex并且obj->condition是 a boost::interprocess::interprocess_condition。这是 g++ 错误日志：

code.cpp: In member function ‘[...]’:
code.cpp:42: error: no matching function for call to ‘boost::interprocess::interprocess_condition::timed_wait(boost::interprocess::scoped_lock<boost::interprocess::interprocess_mutex>&, boost::posix_time::milliseconds)

而这是条件类成员函数的原型（boost/interprocess/sync/interprocess_condition.hpp）：

template <typename L, typename Pr>
   bool timed_wait(L& lock, const boost::posix_time::ptime &abs_time, Pr pred)

（提升 1.40）

Answer 1

多亏了#boost IRC 用户 (mjcaisse)，我现在有了一个线索：timed_wait 需要一个绝对时间。

bool noTimeout = true;
boost::system_time timeout = boost::get_system_time() + milliseconds(10);
while (!noTimeout && [CONDITION NOT MET])
{
   noTimeout = obj->condition.timed_wait(lock, timeout);
}

if (!noTimeout)
{
   std::cout << "timeout!" << std::endl;
}