ucommon
commoncpp/process.h
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00001 // Copyright (C) 1999-2005 Open Source Telecom Corporation.
00002 // Copyright (C) 2006-2014 David Sugar, Tycho Softworks.
00003 //
00004 // This program is free software; you can redistribute it and/or modify
00005 // it under the terms of the GNU General Public License as published by
00006 // the Free Software Foundation; either version 2 of the License, or
00007 // (at your option) any later version.
00008 //
00009 // This program is distributed in the hope that it will be useful,
00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 // GNU General Public License for more details.
00013 //
00014 // You should have received a copy of the GNU Lesser General Public License
00015 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
00016 //
00017 // As a special exception, you may use this file as part of a free software
00018 // library without restriction.  Specifically, if other files instantiate
00019 // templates or use macros or inline functions from this file, or you compile
00020 // this file and link it with other files to produce an executable, this
00021 // file does not by itself cause the resulting executable to be covered by
00022 // the GNU General Public License.  This exception does not however
00023 // invalidate any other reasons why the executable file might be covered by
00024 // the GNU General Public License.
00025 //
00026 // This exception applies only to the code released under the name GNU
00027 // Common C++.  If you copy code from other releases into a copy of GNU
00028 // Common C++, as the General Public License permits, the exception does
00029 // not apply to the code that you add in this way.  To avoid misleading
00030 // anyone as to the status of such modified files, you must delete
00031 // this exception notice from them.
00032 //
00033 // If you write modifications of your own for GNU Common C++, it is your choice
00034 // whether to permit this exception to apply to your modifications.
00035 // If you do not wish that, delete this exception notice.
00036 //
00037 
00043 #ifndef COMMONCPP_PROCESS_H_
00044 #define COMMONCPP_PROCESS_H_
00045 
00046 #ifndef COMMONCPP_CONFIG_H_
00047 #include <commoncpp/config.h>
00048 #endif
00049 
00050 #ifndef COMMONCPP_THREAD_H_
00051 #include <commoncpp/thread.h>
00052 #endif
00053 
00054 namespace ost {
00055 
00066 class __EXPORT Process
00067 {
00068 private:
00069     static bool rtflag;
00070 
00071 public:
00072 #ifndef _MSWINDOWS_
00073     typedef void (*Trap)(int);
00074 
00080     static void detach(void);
00081 
00089     static void attach(const char *devname);
00090 
00098     static Trap setPosixSignal(int signo, Trap handler);
00099 
00107     static Trap setInterruptSignal(int signo, Trap handler);
00108 #endif
00109 
00117     bool lock(bool future = true);
00118 
00122     void unlock(void);
00123 
00141     static int spawn(const char *exec, const char **argv, bool wait = true);
00142 
00150     static int join(int pid);
00151 
00159     static bool cancel(int pid, int sig = 0);
00160 
00167     static const char *getEnv(const char *name);
00168 
00176     static void setEnv(const char *name, const char *value, bool overwrite);
00177 
00183     static const char *getConfigDir(void);
00184 
00190     static const char *getHomeDir(void);
00191 
00197     static const char *getUser(void);
00198 
00204     static bool setUser(const char *id, bool grp = true);
00205 
00211     static bool setGroup(const char *id);
00212 
00218     static size_t getPageSize(void);
00219 
00223     static void setPriority(int pri);
00224 
00228     static void setScheduler(const char *policy);
00229 
00233     static void setRealtime(int pri = 0);
00234 
00238     static bool isScheduler(void);
00239 
00243     static inline bool isRealtime(void)
00244         {return rtflag;}
00245 };
00246 
00256 class __EXPORT Lockfile
00257 {
00258 private:
00259 #ifdef  _MSWINDOWS_
00260     HANDLE  _mutex;
00261     bool    _flagged;
00262 #else
00263     char *_path;
00264 #endif
00265 
00266 public:
00272     Lockfile(const char *name);
00273 
00277     Lockfile();
00278 
00282     ~Lockfile()
00283         {unlock();}
00284 
00293     bool lock(const char *name);
00294 
00298     void unlock(void);
00299 
00305     bool isLocked(void);
00306 };
00307 
00308 } // namespace ost
00309 
00310 #endif