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