critsect.h

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/*
  Copyright (c) Mircea Neacsu (2014-2025) Licensed under MIT License.
  This file is part of MLIB project. See LICENSE file for full license terms.
*/
 

 
#pragma once
 
#if __has_include("defs.h")
#include "defs.h"
#endif
#include "safe_winsock.h"
 
namespace mlib {

class criticalsection
{
public:
  criticalsection ();
  virtual void enter ();
  virtual bool try_enter ();
  virtual void leave ();
 
private:
  std::shared_ptr<CRITICAL_SECTION> section;
 
};

 
class lock
{
public:
  lock (criticalsection& cs);

  lock (const lock& t);

  ~lock ();
 
private:
  criticalsection& section;
};

inline criticalsection::criticalsection ()
{
  auto sect = new CRITICAL_SECTION;
  InitializeCriticalSection (sect);
  section = std::shared_ptr<CRITICAL_SECTION> (sect, DeleteCriticalSection);
}

inline void criticalsection::enter ()
{
  EnterCriticalSection (section.get());
}

inline bool criticalsection::try_enter ()
{
  return (TryEnterCriticalSection (section.get()) != 0);
}

inline void criticalsection::leave ()
{
  LeaveCriticalSection (section.get());
}
 
inline lock::lock (criticalsection& cs)
  : section (cs)
{
  section.enter ();
}
 
inline lock::lock (const lock& t)
  : section (t.section)
{
  section.enter ();
}
 
inline lock::~lock ()
{
  section.leave ();
}
 
} // namespace mlib