ConditionVariable.h

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/*
 * Copyright (c) 2005 Palmsource, Inc.
 * 
 * This software is licensed as described in the file LICENSE, which
 * you should have received as part of this distribution. The terms
 * are also available at http://www.openbinder.org/license.html.
 * 
 * This software consists of voluntary contributions made by many
 * individuals. For the exact contribution history, see the revision
 * history and logs, available at http://www.openbinder.org
 */

#ifndef _SUPPORT_CONDITIONVARIABLE_H
#define _SUPPORT_CONDITIONVARIABLE_H

#include <support/SupportDefs.h>
#include <support/Atom.h>

#if _SUPPORTS_NAMESPACE
namespace palmos {
namespace support {
#endif

class SLocker;

/*-------------------------------------------------------------*/
/*----- SConditionVariable class ------------------------------*/

class SConditionVariable
{
public:
                            SConditionVariable();
                            SConditionVariable(const char* name);
                            ~SConditionVariable();  

        void                Wait();


        void                Wait(SLocker& locker);


        void                Open();


        void                Close();


        void                Broadcast();

private:
        // SConditionVariable can't be copied
                            SConditionVariable(const SConditionVariable&);
        SConditionVariable& operator = (const SConditionVariable&);

        volatile int32_t                m_var;
};

/*-------------------------------------------------------------*/
/*----- SConditionAtom class ----------------------------------*/

class SConditionAtom : public virtual SAtom
{
public:
    inline          SConditionAtom(SConditionVariable *cv) :m_cv(cv) { }
    inline virtual  ~SConditionAtom()   { m_cv->Open(); }
    
    inline void Wait()                  { m_cv->Wait(); }
    inline void Wait(SLocker &locker)   { m_cv->Wait(locker); }
    inline void Open()                  { m_cv->Open(); }
    inline void Close()                 { m_cv->Close(); }
    inline void Broadcast()             { m_cv->Broadcast(); }
    
private:
    SConditionAtom();
    SConditionAtom(const SConditionAtom &);
    SConditionVariable *m_cv;
};

/*-------------------------------------------------------------*/
/*-------------------------------------------------------------*/

#if _SUPPORTS_NAMESPACE
} } // namespace palmos::support
#endif

#endif /* _SUPPORT_CONDITIONVARIABLE_H */

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