helping_lock.h

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// AUTOMATICALLY GENERATED -- DO NOT EDIT!         -*- c++ -*-

#ifndef helping_lock_h
#define helping_lock_h

#include "lock_guard.h"
#include "switch_lock.h"

//
// INTERFACE definition follows 
//


class Helping_lock  
{
  Switch_lock _switch_lock;

public:
  static bool threading_system_active;

public:  
  inline Helping_lock();
  
  bool test_and_set();
  
  inline void lock();
  
  inline bool test();
  
  inline void clear();
  
  inline Context* lock_owner();
};

typedef Lock_guard<Helping_lock> Helping_lock_guard;

//
// IMPLEMENTATION includes follow (for use by inline functions)
//


#include "globals.h"
#include "panic.h"
#include "std_macros.h"

//
// IMPLEMENTATION of inline functions (and needed classes)
//



inline Helping_lock::Helping_lock()
{
  _switch_lock.initialize();
}


inline void 
Helping_lock::lock()
{
  check ( test_and_set() == false );
}


inline bool
Helping_lock::test()
{
  if (EXPECT_FALSE( ! threading_system_active) ) // still initializing?
    return false;

  return _switch_lock.test();
}


inline void
Helping_lock::clear()
{
  if (EXPECT_FALSE( ! threading_system_active) ) // still initializing?
    return;

  _switch_lock.clear();
}


inline Context*
Helping_lock::lock_owner()
{
  if (EXPECT_FALSE( ! threading_system_active) ) // still initializing?
    return current();

  return _switch_lock.lock_owner();
}

#endif // helping_lock_h

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