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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_GROUP_HPP_
#define BOOST_PROCESS_DETAIL_WINDOWS_GROUP_HPP_
#include <boost/process/detail/windows/handler.hpp>
#include <boost/detail/winapi/jobs.hpp>
#include <boost/process/detail/windows/child_handle.hpp>
#include <boost/process/detail/windows/job_workaround.hpp>
#include <system_error>
namespace boost { namespace process { namespace detail { namespace windows {
inline bool break_away_enabled(::boost::detail::winapi::HANDLE_ h)
{
workaround::JOBOBJECT_EXTENDED_LIMIT_INFORMATION_ info;
if (!workaround::query_information_job_object(
h,
workaround::JobObjectExtendedLimitInformation_,
static_cast<void*>(&info),
sizeof(info),
nullptr))
throw_last_error("QueryInformationJobObject() failed");
return (info.BasicLimitInformation.LimitFlags & workaround::JOB_OBJECT_LIMIT_BREAKAWAY_OK_) != 0;
}
inline void enable_break_away(::boost::detail::winapi::HANDLE_ h)
{
workaround::JOBOBJECT_EXTENDED_LIMIT_INFORMATION_ info;
if (!workaround::query_information_job_object(
h,
workaround::JobObjectExtendedLimitInformation_,
static_cast<void*>(&info),
sizeof(info),
nullptr))
throw_last_error("QueryInformationJobObject() failed");
if ((info.BasicLimitInformation.LimitFlags & workaround::JOB_OBJECT_LIMIT_BREAKAWAY_OK_) != 0)
return;
info.BasicLimitInformation.LimitFlags |= workaround::JOB_OBJECT_LIMIT_BREAKAWAY_OK_;
if (!workaround::set_information_job_object(
h,
workaround::JobObjectExtendedLimitInformation_,
static_cast<void*>(&info),
sizeof(info)))
throw_last_error("SetInformationJobObject() failed");
}
inline void enable_break_away(::boost::detail::winapi::HANDLE_ h, std::error_code & ec)
{
workaround::JOBOBJECT_EXTENDED_LIMIT_INFORMATION_ info;
if (!workaround::query_information_job_object(
h,
workaround::JobObjectExtendedLimitInformation_,
static_cast<void*>(&info),
sizeof(info),
nullptr))
{
ec = get_last_error();
return;
}
if ((info.BasicLimitInformation.LimitFlags & workaround::JOB_OBJECT_LIMIT_BREAKAWAY_OK_) != 0)
return;
info.BasicLimitInformation.LimitFlags |= workaround::JOB_OBJECT_LIMIT_BREAKAWAY_OK_;
if (!workaround::set_information_job_object(
h,
workaround::JobObjectExtendedLimitInformation_,
static_cast<void*>(&info),
sizeof(info)))
{
ec = get_last_error();
return;
}
}
struct group_handle
{
::boost::detail::winapi::HANDLE_ _job_object;
typedef ::boost::detail::winapi::HANDLE_ handle_t;
handle_t handle() const { return _job_object; }
explicit group_handle(handle_t h) :
_job_object(h)
{
enable_break_away(_job_object);
}
group_handle() : group_handle(::boost::detail::winapi::CreateJobObjectA(nullptr, nullptr))
{
}
~group_handle()
{
::boost::detail::winapi::CloseHandle(_job_object);
}
group_handle(const group_handle & c) = delete;
group_handle(group_handle && c) : _job_object(c._job_object)
{
c._job_object = ::boost::detail::winapi::invalid_handle_value;
}
group_handle &operator=(const group_handle & c) = delete;
group_handle &operator=(group_handle && c)
{
::boost::detail::winapi::CloseHandle(_job_object);
_job_object = c._job_object;
c._job_object = ::boost::detail::winapi::invalid_handle_value;
return *this;
}
void add(handle_t proc)
{
if (!::boost::detail::winapi::AssignProcessToJobObject(_job_object, proc))
throw_last_error();
}
void add(handle_t proc, std::error_code & ec) noexcept
{
if (!::boost::detail::winapi::AssignProcessToJobObject(_job_object, proc))
ec = get_last_error();
}
bool has(handle_t proc)
{
::boost::detail::winapi::BOOL_ is;
if (!::boost::detail::winapi::IsProcessInJob(proc, _job_object, &is))
throw_last_error();
return is!=0;
}
bool has(handle_t proc, std::error_code & ec) noexcept
{
::boost::detail::winapi::BOOL_ is;
if (!::boost::detail::winapi::IsProcessInJob(proc, _job_object, &is))
ec = get_last_error();
return is!=0;
}
bool valid() const
{
return _job_object != nullptr;
}
};
inline void terminate(const group_handle &p)
{
if (!::boost::detail::winapi::TerminateJobObject(p.handle(), EXIT_FAILURE))
boost::process::detail::throw_last_error("TerminateJobObject() failed");
}
inline void terminate(const group_handle &p, std::error_code &ec) noexcept
{
if (!::boost::detail::winapi::TerminateJobObject(p.handle(), EXIT_FAILURE))
ec = boost::process::detail::get_last_error();
else
ec.clear();
}
inline bool in_group()
{
::boost::detail::winapi::BOOL_ res;
if (!::boost::detail::winapi::IsProcessInJob(boost::detail::winapi::GetCurrentProcess(), nullptr, &res))
throw_last_error("IsProcessInJob failed");
return res!=0;
}
}}}}
#endif /* BOOST_PROCESS_DETAIL_WINDOWS_GROUP_HPP_ */
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