critsect.h

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#pragma once
#if __has_include("defs.h")
#include "defs.h"
#endif
#include "safe_winsock.h"
 
namespace mlib {
 
class criticalsection
{
public:
  criticalsection ();
  ~criticalsection ();
  virtual void enter ();
  virtual bool try_enter ();
  virtual void leave ();
 
private:
  CRITICAL_SECTION section;
 
  // critical sections cannot be copied or assigned
  criticalsection (const criticalsection&) = delete;
  criticalsection& operator= (const criticalsection&) = delete;
};
 
class lock
{
public:
  lock (criticalsection& cs);
 
  lock (const lock& t);
 
  ~lock ();
 
private:
  criticalsection& section;
};
 
inline criticalsection::criticalsection ()
{
  InitializeCriticalSection (&section);
}
 
inline criticalsection::~criticalsection ()
{
  DeleteCriticalSection (&section);
}
 
inline void criticalsection::enter ()
{
  EnterCriticalSection (&section);
}
 
inline bool criticalsection::try_enter ()
{
  return (TryEnterCriticalSection (&section) != 0);
}
 
inline void criticalsection::leave ()
{
  LeaveCriticalSection (&section);
}
 
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