...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::process::extend::async_handler
// In header: <boost/process/extend.hpp> struct async_handler : public boost::process::extend::handler, public boost::process::extend::require_io_context { };
Inheriting this class will tell the launching function, that an event handler shall be invoked when the process exits. This automatically does also inherit require_io_context.
You must add the following function to your implementation:
template<typename Executor> std::function<void(int, const std::error_code&)> on_exit_handler(Executor & exec) { auto handler_ = this->handler; return [handler_](int exit_code, const std::error_code & ec) { handler_(static_cast<int>(exit_code), ec); }; }
The callback will be obtained by calling this function on setup and it will be invoked when the process exits.
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Warning |
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Cannot be used with boost::process::spawn |