{

this->close();

#ifdef WIN32

this->mtx_name = "mtx-" + mutexName;

#ifdef UNICODE

std::wstring_convert<std::codecvt_utf8_utf16<wchar_t> > converter;

const std::wstring mutex_name = converter.from_bytes(this->mtx_name);

#else

const std::string &mutex_name = this->mtx_name;

#endif

this->mtx_desc = ::CreateMutex(nullptr, false, mutex_name.c_str() );

if (nullptr == this->mtx_desc)

{

return false;

}

#elif POSIX

::sem_t *sem = ::sem_open(mutexName.c_str(), O_CREAT, 0666, 1);

if (SEM_FAILED == sem)

{

return false;

}

this->mtx_desc = sem;

this->mtx_name = mutexName;

#else

#error "Undefine platform"

#endif

return true;

{

#ifdef WIN32

const std::string mtx_name = "mtx-" + mutexName;

#ifdef UNICODE

std::wstring_convert<std::codecvt_utf8_utf16<wchar_t> > converter;

const std::wstring mutex_name = converter.from_bytes(mtx_name);

#else

const std::string &mutex_name = mtx_name;

#endif

::HANDLE hMutex = ::OpenMutex(DELETE, true, mutex_name.c_str() );

return 0 != ::CloseHandle(hMutex);

#elif POSIX

return 0 == ::sem_unlink(mutexName.c_str() );

#else

#error "Undefine platform"

#endif

{

#ifdef WIN32

#ifdef UNICODE

std::wstring_convert<std::codecvt_utf8_utf16<wchar_t> > converter;

const std::wstring mutex_name = converter.from_bytes(this->mtx_name);

#else

const std::string &mutex_name = this->mtx_name;

#endif

::HANDLE hMutex = ::OpenMutex(DELETE, true, mutex_name.c_str() );

const bool ret = (0 != ::CloseHandle(hMutex) );

this->close();

return ret;

#elif POSIX

const int ret = ::sem_unlink(this->mtx_name.c_str() );

this->close();

return 0 == ret;

#else

#error "Undefine platform"

#endif

{

this->close();

#ifdef WIN32

this->mtx_name = "mtx-" + mutexName;

#ifdef UNICODE

std::wstring_convert<std::codecvt_utf8_utf16<wchar_t> > converter;

const std::wstring mutex_name = converter.from_bytes(this->mtx_name);

#else

const std::string &mutex_name = this->mtx_name;

#endif

this->mtx_desc = ::OpenMutex(SYNCHRONIZE, false, mutex_name.c_str() );

if (nullptr == this->mtx_desc)

{

return false;

}

#elif POSIX

::sem_t *sem = ::sem_open(mutexName.c_str(), 0);

if (SEM_FAILED == sem)

{

return false;

}

this->mtx_desc = sem;

#else

#error "Undefine platform"

#endif

this->mtx_name = mutexName;

return true;

{

if (this->mtx_desc)

{

#ifdef WIN32

::CloseHandle(this->mtx_desc);

this->mtx_desc = nullptr;

#elif POSIX

::sem_close(this->mtx_desc);

this->mtx_desc = nullptr;

#else

#error "Undefine platform"

#endif

this->mtx_name.clear();

return true;

}

return false;

{

#ifdef WIN32

return nullptr != this->mtx_desc;

#elif POSIX

return nullptr != this->mtx_desc;

#else

#error "Undefine platform"

#endif

{

#ifdef WIN32

return WAIT_OBJECT_0 == ::WaitForSingleObject(this->mtx_desc, INFINITE);

#elif POSIX

return 0 == ::sem_wait(this->mtx_desc);

#else

#error "Undefine platform"

#endif

{

#ifdef WIN32

return WAIT_OBJECT_0 == ::WaitForSingleObject(this->mtx_desc, 0);

#elif POSIX

return 0 == ::sem_trywait(this->mtx_desc);

#else

#error "Undefine platform"

#endif

{

#ifdef WIN32

return 0 != ::ReleaseMutex(this->mtx_desc);

#elif POSIX

return 0 == ::sem_post(this->mtx_desc);

#else

#error "Undefine platform"

#endif