critical_section.h

/*****************************************************/
/* lean Concurrent              (c) Tobias Zirr 2011 */
/*****************************************************/

#ifndef LEAN_CONCURRENT_CRITICAL_SECTION
#define LEAN_CONCURRENT_CRITICAL_SECTION

#include "../lean.h"
#include "../tags/noncopyable.h"
#include <windows.h>

// Include automatically to encourage use of scoped_lock
#include "../smart/scoped_lock.h"

namespace lean
{
namespace concurrent
{

class critical_section : public noncopyable
{
private:
    CRITICAL_SECTION m_criticalSection;

public:
    critical_section(unsigned long spinCount = 4096)
    {
        if (!::InitializeCriticalSectionAndSpinCount(&m_criticalSection, spinCount))
            LEAN_ASSERT(false);
    }
    ~critical_section()
    {
        ::DeleteCriticalSection(&m_criticalSection);
    }

    LEAN_INLINE bool try_lock()
    {
        return (::TryEnterCriticalSection(&m_criticalSection) != FALSE);
    }

    LEAN_INLINE void lock()
    {
        ::EnterCriticalSection(&m_criticalSection);
    }

    LEAN_INLINE void unlock()
    {
        ::LeaveCriticalSection(&m_criticalSection);
    }
};

typedef smart::scoped_lock<critical_section> scoped_cs_lock;

} // namespace

using concurrent::critical_section;

using concurrent::scoped_cs_lock;

} // namespace

#endif