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# thread.h

    00001 //
    00002 // thread.h
    00003 //
    00004 // Copyright (C) 1997 Limit Point Systems, Inc.
    00005 //
    00006 // Author: Edward Seidl <seidl@janed.com>
    00007 // Maintainer: LPS
    00008 //
    00009 // This file is part of the SC Toolkit.
    00010 //
    00011 // The SC Toolkit is free software; you can redistribute it and/or modify
    00012 // it under the terms of the GNU Library General Public License as published by
    00013 // the Free Software Foundation; either version 2, or (at your option)
    00014 // any later version.
    00015 //
    00016 // The SC Toolkit is distributed in the hope that it will be useful,
    00017 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00018 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00019 // GNU Library General Public License for more details.
    00020 //
    00021 // You should have received a copy of the GNU Library General Public License
    00022 // along with the SC Toolkit; see the file COPYING.LIB.  If not, write to
    00023 // the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
    00024 //
    00025 // The U.S. Government is granted a limited license as per AL 91-7.
    00026 //
    00027
    00028 #ifndef _util_group_thread_h
    00029 #define _util_group_thread_h
    00030
    00031 #ifdef __GNUC__
    00032 #pragma interface
    00033 #endif
    00034
    00035 #include <util/class/class.h>
    00036
    00037 namespace sc {
    00038
    00044 class ThreadLock : public RefCount {
    00045   public:
    00046     ThreadLock();
    00047     virtual ~ThreadLock();
    00048
    00050     virtual void lock() =0;
    00052     virtual void unlock() =0;
    00053 };
    00054
    00055
    00060 class ThreadLockHolder {
    00061     Ref<ThreadLock> lock_;
    00062   public:
    00063     ThreadLockHolder(const Ref<ThreadLock> &l): lock_(l) { lock_->lock(); }
    00064     ~ThreadLockHolder() { lock_->unlock(); }
    00065 };
    00066
    00069 class Thread {
    00070   public:
    00071     Thread();
    00072     virtual ~Thread();
    00073
    00074     static void *run_Thread_run(void*thread);
    00075
    00077     virtual void run() =0;
    00078 };
    00079
    00082 class ThreadGrp: public DescribedClass {
    00083   protected:
    00084     Thread** threads_;
    00085     int nthread_;
    00086
    00087   public:
    00088     ThreadGrp();
    00089     ThreadGrp(const Ref<KeyVal>&);
    00090     ThreadGrp(const ThreadGrp&, int nthread = -1);
    00091     virtual ~ThreadGrp();
    00092
    00095     virtual void add_thread(int threadnum, Thread* thread);
    00099     virtual void add_thread(int threadnum, Thread* thread, int priority);
    00101     int nthread() const { return nthread_; }
    00102
    00103     void delete_threads();
    00104
    00107     virtual int start_threads() =0;
    00110     virtual int wait_threads() =0;
    00112     virtual Ref<ThreadLock> new_lock() =0;
    00113
    00118     virtual ThreadGrp* clone(int nthread = -1);
    00119
    00120     static void set_default_threadgrp(const Ref<ThreadGrp>&);
    00121     static ThreadGrp * get_default_threadgrp();
    00122     static ThreadGrp * initial_threadgrp(int &argc, char ** argv);
    00123 };
    00124
    00125
    00129 class ProcThreadGrp: public ThreadGrp {
    00130   public:
    00131     ProcThreadGrp();
    00132     ProcThreadGrp(const Ref<KeyVal>&);
    00133     ~ProcThreadGrp();
    00134
    00135     int start_threads();
    00136     int wait_threads();
    00137
    00138     Ref<ThreadLock> new_lock();
    00139
    00140     ThreadGrp* clone(int nthread = -1);
    00141 };
    00142
    00143 }
    00144
    00145 extern "C" {
    00146     // a C linkage interface to run_Thread_run
    00147     void *Thread__run_Thread_run(void*thread);
    00148 }
    00149
    00150 #endif
    00151
    00152 // Local Variables:
    00153 // mode: c++
    00154 // c-file-style: "ETS"
    00155 // End: