Leaked source code of windows server 2003
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//
// MODULE: SafeTime.cpp
//
// PURPOSE: threadsafe wrappers for some standard time-related calls.
//
// COMPANY: Saltmine Creative, Inc. (206)-284-7511 [email protected]
//
// AUTHOR: Joe Mabel
//
// ORIGINAL DATE: 10-12-98
//
// NOTES:
// 1. gmtime, mktime, and localtime all use a single statically allocated tm structure
// for the conversion. Each call to one of these routines destroys the result of the
// previous call. Obviously, that's not threadsafe.
// 2. Right now this only deals with localtime, because we're not using the other 2 fns.
// If we need to use gmtime or mktime, they'll need to be built analogously, using the
// same mutex.
// 3. _tasctime uses a single, statically allocated buffer to hold its return string.
// Each call to this function destroys the result of the previous call.
//
// Version Date By Comments
//--------------------------------------------------------------------
// V3.0 10-12-98 JM
//
#include "stdafx.h"
#include "SafeTime.h"
#include "BaseException.h"
#include "Event.h"
#include "apiwraps.h"
CMutexOwner CSafeTime::s_mx(_T("SafeTime"));
//////////////////////////////////////////////////////////////////////
// CSafeTime
//////////////////////////////////////////////////////////////////////
CSafeTime::CSafeTime(time_t time) :
m_time(time)
{
}
CSafeTime::~CSafeTime()
{
}
// return local time as a struct tm
struct tm CSafeTime::LocalTime()
{
struct tm tmLocal;
WAIT_INFINITE( s_mx.Handle() );
tmLocal = *(localtime(&m_time));
::ReleaseMutex(s_mx.Handle());
return tmLocal;
}
// return GMT as a struct tm
struct tm CSafeTime::GMTime()
{
struct tm tmLocal;
WAIT_INFINITE( s_mx.Handle() );
tmLocal = *(gmtime(&m_time));
::ReleaseMutex(s_mx.Handle());
return tmLocal;
}
CString CSafeTime::StrLocalTime(LPCTSTR invalid_time /*=_T("Invalid Date/Time")*/)
{
CString str;
WAIT_INFINITE( s_mx.Handle() );
if (m_time)
str = _tasctime(localtime(&m_time));
else
str = invalid_time;
::ReleaseMutex(s_mx.Handle());
return str;
}