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// Copyright (c) 2016 Klemens D. Morgenstern
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_PROCESS_DETAIL_WINDOWS_WAIT_GROUP_HPP_
#define BOOST_PROCESS_DETAIL_WINDOWS_WAIT_GROUP_HPP_
#include <boost/process/detail/config.hpp>
#include <boost/process/detail/windows/group_handle.hpp>
#include <boost/winapi/jobs.hpp>
#include <boost/winapi/wait.hpp>
#include <chrono>
namespace boost { namespace process { namespace detail { namespace windows {
struct group_handle;
inline bool wait_impl(const group_handle & p, std::error_code & ec, std::chrono::system_clock::rep wait_time)
{
::boost::winapi::DWORD_ completion_code;
::boost::winapi::ULONG_PTR_ completion_key;
::boost::winapi::LPOVERLAPPED_ overlapped;
auto start_time = std::chrono::system_clock::now();
while (workaround::get_queued_completion_status(
p._io_port, &completion_code,
&completion_key, &overlapped, wait_time))
{
if (reinterpret_cast<::boost::winapi::HANDLE_>(completion_key) == p._job_object &&
completion_code == workaround::JOB_OBJECT_MSG_ACTIVE_PROCESS_ZERO_)
{
//double check, could be a different handle from a child
workaround::JOBOBJECT_BASIC_ACCOUNTING_INFORMATION_ info;
if (!workaround::query_information_job_object(
p._job_object,
workaround::JobObjectBasicAccountingInformation_,
static_cast<void *>(&info),
sizeof(info), nullptr))
{
ec = get_last_error();
return false;
}
else if (info.ActiveProcesses == 0)
return false; //correct, nothing left.
}
//reduce the remaining wait time -> in case interrupted by something else
if (wait_time != ::boost::winapi::infinite)
{
auto now = std::chrono::system_clock::now();
auto diff = std::chrono::duration_cast<std::chrono::milliseconds>(now - start_time);
wait_time -= diff.count();
start_time = now;
if (wait_time <= 0)
return true; //timeout with other source
}
}
auto ec_ = get_last_error();
if (ec_.value() == ::boost::winapi::wait_timeout)
return true; //timeout
ec = ec_;
return false;
}
inline void wait(const group_handle &p, std::error_code &ec)
{
wait_impl(p, ec, ::boost::winapi::infinite);
}
inline void wait(const group_handle &p)
{
std::error_code ec;
wait(p, ec);
boost::process::detail::throw_error(ec, "wait error");
}
template< class Clock, class Duration >
inline bool wait_until(
const group_handle &p,
const std::chrono::time_point<Clock, Duration>& timeout_time,
std::error_code &ec)
{
std::chrono::milliseconds ms =
std::chrono::duration_cast<std::chrono::milliseconds>(
timeout_time - Clock::now());
auto timeout = wait_impl(p, ec, ms.count());
return !ec && !timeout;
}
template< class Clock, class Duration >
inline bool wait_until(
const group_handle &p,
const std::chrono::time_point<Clock, Duration>& timeout_time)
{
std::error_code ec;
bool b = wait_until(p, timeout_time, ec);
boost::process::detail::throw_error(ec, "wait_until error");
return b;
}
template< class Rep, class Period >
inline bool wait_for(
const group_handle &p,
const std::chrono::duration<Rep, Period>& rel_time,
std::error_code &ec)
{
auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(rel_time);
auto timeout = wait_impl(p, ec, ms.count());
return !ec && !timeout;
}
template< class Rep, class Period >
inline bool wait_for(
const group_handle &p,
const std::chrono::duration<Rep, Period>& rel_time)
{
std::error_code ec;
bool b = wait_for(p, rel_time, ec);
boost::process::detail::throw_error(ec, "wait_for error");
return b;
}
}}}}
#endif /* BOOST_PROCESS_DETAIL_WINDOWS_WAIT_GROUP_HPP_ */
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