PthreadMutexAttr.h

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//=============================================================================
//  PthreadMutexAttr class
//-----------------------------------------------------------------------------
//  POSIX Pthread class library
//  Copyright (C) 1997-1999  The University of Texas
//
//  This library is free software; you can redistribute it and/or modify it
//  under the terms of the GNU Library General Public License as published
//  by the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//
//  This library 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
//  Library General Public License for more details.
//
//  The GNU Public License is available in the file LICENSE, or you
//  can write to the Free Software Foundation, Inc., 59 Temple Place -
//  Suite 330, Boston, MA 02111-1307, USA, or you can find it on the
//  World Wide Web at http://www.fsf.org.
//=============================================================================


#ifndef PthreadMutexAttr_h
#define PthreadMutexAttr_h
#pragma once

#ifdef EXTERNAL_TEMPLATES
#     pragma interface
#endif
#include <cpn/common.h>
#include <cpn/threading/PthreadDefs.h>
#ifdef _POSIX_THREADS

#include <cpn/threading/PthreadErrorHandler.h>


class PthreadMutexAttr : public PthreadErrorHandler {
  public:
    PthreadMutexAttr(void);
   ~PthreadMutexAttr(void);
    operator pthread_mutexattr_t* (void)                { return &theAttr; }
    operator const pthread_mutexattr_t* (void) const    { return &theAttr; }

    #if (defined(_POSIX_THREAD_PRIO_PROTECT) && (_POSIX_THREAD_PRIO_PROTECT+0>0)) \
     || (defined(_POSIX_THREAD_PRIO_INHERIT) && (_POSIX_THREAD_PRIO_INHERIT+0>0))
        int                 UsingNoPriorityProtocol()   { return Protocol() == POSIX_PRIO_NONE; }
        PthreadMutexAttr&   NoPriorityProtocol()        { return Protocol(POSIX_PRIO_NONE); }
    #endif

    #if defined(_POSIX_THREAD_PRIO_PROTECT) && (_POSIX_THREAD_PRIO_PROTECT+0>0)
        int     PriorityCeiling(void);
        int     UsingPriorityCeiling(void)              { return Protocol() == POSIX_PRIO_PROTECT; }
        PthreadMutexAttr&   PriorityCeiling(int ceiling);
    #endif

    #if defined(_POSIX_THREAD_PRIO_INHERIT) && (_POSIX_THREAD_PRIO_INHERIT+0>0)
        PthreadMutexAttr&   PriorityInheritance()       { return Protocol(POSIX_PRIO_INHERIT); }
        int                 UsingPriorityInheritance()  { return Protocol() == POSIX_PRIO_INHERIT; }
    #endif

    #if defined(_POSIX_THREAD_PROCESS_SHARED) && (_POSIX_THREAD_PROCESS_SHARED+0>0)
        int                 ProcessShared(void);
        PthreadMutexAttr&   ProcessShared(int pshared);
    #endif

  private:
    pthread_mutexattr_t         theAttr;

    #if (defined(_POSIX_THREAD_PRIO_PROTECT) && (_POSIX_THREAD_PRIO_PROTECT+0>0)) \
     || (defined(_POSIX_THREAD_PRIO_INHERIT) && (_POSIX_THREAD_PRIO_INHERIT+0>0))
        int                 Protocol(void);
        PthreadMutexAttr&   Protocol(int protocol);
    #endif

    friend class PthreadMutex;
};


#endif
#endif