commoncpp/process.h

Go to the documentation of this file.

// Copyright (C) 1999-2005 Open Source Telecom Corporation.
// Copyright (C) 2006-2014 David Sugar, Tycho Softworks.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
//
// This exception applies only to the code released under the name GNU
// Common C++.  If you copy code from other releases into a copy of GNU
// Common C++, as the General Public License permits, the exception does
// not apply to the code that you add in this way.  To avoid misleading
// anyone as to the status of such modified files, you must delete
// this exception notice from them.
//
// If you write modifications of your own for GNU Common C++, it is your choice
// whether to permit this exception to apply to your modifications.
// If you do not wish that, delete this exception notice.
//

#ifndef COMMONCPP_PROCESS_H_
#define COMMONCPP_PROCESS_H_

#ifndef COMMONCPP_CONFIG_H_
#include <commoncpp/config.h>
#endif

#ifndef COMMONCPP_THREAD_H_
#include <commoncpp/thread.h>
#endif

NAMESPACE_COMMONCPP

class __EXPORT Process
{
private:
    static bool rtflag;

public:
#ifndef _MSWINDOWS_
    typedef void (*Trap)(int);

    static void detach(void);

    static void attach(const char *devname);

    static Trap setPosixSignal(int signo, Trap handler);

    static Trap setInterruptSignal(int signo, Trap handler);
#endif

    bool lock(bool future = true);

    void unlock(void);

    static int spawn(const char *exec, const char **argv, bool wait = true);

    static int join(int pid);

    static bool cancel(int pid, int sig = 0);

    static const char *getEnv(const char *name);

    static void setEnv(const char *name, const char *value, bool overwrite);

    static const char *getConfigDir(void);

    static const char *getHomeDir(void);

    static const char *getUser(void);

    static bool setUser(const char *id, bool grp = true);

    static bool setGroup(const char *id);

    static size_t getPageSize(void);

    static void setPriority(int pri);

    static void setScheduler(const char *policy);

    static void setRealtime(int pri = 0);

    static bool isScheduler(void);

    static inline bool isRealtime(void)
        {return rtflag;};
};

class __EXPORT Lockfile
{
private:
#ifdef  _MSWINDOWS_
    HANDLE  _mutex;
    bool    _flagged;
#else
    char *_path;
#endif

public:
    Lockfile(const char *name);

    Lockfile();

    ~Lockfile()
        {unlock();};

    bool lock(const char *name);

    void unlock(void);

    bool isLocked(void);
};

END_NAMESPACE

#endif

---