93 lines
2.6 KiB
C++
93 lines
2.6 KiB
C++
/*
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* Copyright © 2013 Canonical Ltd.
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Authored by: Thomas Voß <thomas.voss@canonical.com>
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*/
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#ifndef CORE_POSIX_PROCESS_H_
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#define CORE_POSIX_PROCESS_H_
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#include <core/posix/process_group.h>
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#include <core/posix/signalable.h>
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#include <core/posix/this_process.h>
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#include <core/posix/visibility.h>
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#include <core/posix/wait.h>
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#include <memory>
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#include <system_error>
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namespace core
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{
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namespace posix
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{
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enum class Signal;
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class Self;
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class WaitFlags;
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/**
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* @brief The Process class models a process and possible operations on it.
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*
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* The process class is implicitly shared.
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*/
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class CORE_POSIX_DLL_PUBLIC Process : public Signalable
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{
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public:
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/**
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* @brief Creates a process instance wrapping an existing process.
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* @throw Throw std::system_error if pid is invalid, i.e., pid < 0.
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* @param pid The process identifier of the existing process.
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*/
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explicit Process(pid_t pid);
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/**
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* @brief Returns an invalid instance for testing purposes.
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* @return An invalid instance.
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*/
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static Process invalid();
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/**
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* @brief Frees resources associated with the process.
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*/
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virtual ~Process() noexcept;
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/**
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* @brief Query the pid of the process.
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* @return The pid of the process.
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*/
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virtual pid_t pid() const;
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/**
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* @brief Queries the id of the process group this process belongs to.
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* @throw std::system_error in case of errors.
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* @return The id of the process group this process belongs to.
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*/
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virtual ProcessGroup process_group_or_throw() const;
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/**
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* @brief Queries the id of the process group this process belongs to.
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*
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* @return A tuple with the first element being the id of the process group
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* this process belongs to and the second element a boolean flag indicating
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* an error if true.
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*/
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virtual ProcessGroup process_group(std::error_code& se) const noexcept(true);
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private:
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struct CORE_POSIX_DLL_LOCAL Private;
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std::shared_ptr<Private> d;
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};
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}
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}
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#endif // CORE_POSIX_PROCESS_H_
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