void op() // GB was operator
{
try {
promise.set_value(f());
} catch(...) {
promise.set_exception(std::current_exception());
}
}
void doSomething (std::promise<std::string>& p)
{
try {
// read character and throw exception if 'x'
std::cout << "read char ('x' for exception): ";
char c = std::cin.get();
if (c == 'x') {
throw std::runtime_error(std::string("char ")+c+" read");
}
//...
std::string s = std::string("char ") + c + " processed";
p.set_value(std::move(s)); // store result
}
catch (...) {
p.set_exception(std::current_exception()); // store exception
}
}
void operator()() {
osmium::thread::set_thread_name("_osmium_write");
try {
while (true) {
std::string data = m_queue.pop();
if (at_end_of_data(data)) {
break;
}
m_compressor->write(data);
}
m_compressor->close();
m_promise.set_value(true);
} catch (...) {
m_promise.set_exception(std::current_exception());
m_queue.drain();
}
}
/**
* @brief Signals the fence
*
* @param e Exception to set the fence to
*/
void set_exception(const std::exception_ptr &e) {
promise.set_exception(e);
}
void func6(std::promise<void> p)
{
std::this_thread::sleep_for(std::chrono::milliseconds(500));
p.set_exception(std::make_exception_ptr('c'));
}
void func4(std::promise<int&> p)
{
std::this_thread::sleep_for(std::chrono::milliseconds(500));
p.set_exception(std::make_exception_ptr(3.5));
}