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NorGUI wrote: do not understand because I have think that the MFC80D.dll was or only used for Debug modus
Yes, but did you compile in release mode ? If you compile in debug mode, you'll still use this dll of course (to change the mode, you'll have to go in the project properties, it depends of which IDE you are using).
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I want to use this timer class for precise data sampling and display the sampled data in strip chart of a dialog time by time
such as 10us a data will be display on strip chart.
below is the class code written by Dean Wyant
<br />
<br />
<br />
__int64 CPerfTimer::m_Freq = 100000; <br />
__int64 CPerfTimer::m_Adjust = 0; <br />
<br />
<br />
<br />
<br />
BOOL CPerfTimer::IsSupported()<br />
{
return (m_Freq > 1);<br />
}<br />
<br />
const double CPerfTimer::Resolution() <br />
{
return 1.0/(double)m_Freq; <br />
}<br />
<br />
const double CPerfTimer::Resolutionms() <br />
{
return 1000.0/(double)m_Freq; <br />
}<br />
<br />
const double CPerfTimer::Resolutionus() <br />
{
return 1000000.0/(double)m_Freq; <br />
}
// CPerfTimer - a simple Win32 performance counter wrapper
// by Dean Wyant dwyant@mindspring.com
/*
This class is simple to use. Just declare a variable(s) as type CPerfTimer,
call Start() to start timimg and call Stop() to stop timimg. You can pause a
timer by calling Stop() and then you can call Start() to resume. Retrieve the
elapsed time by calling an Elapsed..() function. Assignment, addition,
subtraction and comparison are supported. There are a few information calls
available also. All calls except Start and Stop can be performed on a timer
without stopping it.
*/
#ifndef __PERFTIMER_H__<br />
#define __PERFTIMER_H__<br />
<br />
class CPerfTimer<br />
{<br />
public:<br />
CPerfTimer(BOOL bStart = FALSE) {Init(bStart);}<br />
<br />
CPerfTimer(const CPerfTimer& Src); <br />
<br />
virtual ~CPerfTimer() {;}<br />
<br />
void Start(BOOL bReset = FALSE);
void Stop();
<br />
BOOL IsRunning();
<br />
BOOL IsSupported();
<br />
const double Resolution();
const double Resolutionms();
const double Resolutionus();
<br />
const double Elapsed();
const double Elapsedms();
const double Elapsedus();
<br />
const CPerfTimer& operator=(const CPerfTimer& Src);
<br />
CPerfTimer operator+(const CPerfTimer& Src) const;<br />
CPerfTimer operator-(const CPerfTimer& Src) const;<br />
const CPerfTimer& operator+=(const CPerfTimer& Src);<br />
const CPerfTimer& operator-=(const CPerfTimer& Src);<br />
CPerfTimer operator+(const double Secs) const;<br />
CPerfTimer operator-(const double Secs) const;<br />
const CPerfTimer& operator+=(const double Secs);<br />
const CPerfTimer& operator-=(const double Secs);<br />
<br />
BOOL operator<(const CPerfTimer& Src);<br />
BOOL operator>(const CPerfTimer& Src);<br />
BOOL operator<=(const CPerfTimer& Src);<br />
BOOL operator>=(const CPerfTimer& Src);<br />
BOOL operator<(const double Secs);<br />
BOOL operator>(const double Secs);<br />
BOOL operator<=(const double Secs);<br />
BOOL operator>=(const double Secs);<br />
<br />
virtual void Lock() const {;}
virtual void Unlock() const {;}
protected:<br />
void Init(BOOL bStart);<br />
void Copy(const CPerfTimer& Src);<br />
<br />
private:<br />
__int64 m_Start;<br />
static __int64 m_Freq;
static __int64 m_Adjust;
};<br />
<br />
class CPerfTimerT : public CPerfTimer<br />
{
public:<br />
CPerfTimerT(BOOL bStart = FALSE)<br />
{<br />
m_hMutex = CreateMutex(NULL,FALSE,"");<br />
Init(bStart);<br />
}<br />
<br />
CPerfTimerT(const CPerfTimerT& Src) <br />
{ <br />
m_hMutex = CreateMutex(NULL,FALSE,"");<br />
Copy(Src); <br />
}<br />
<br />
CPerfTimerT(const CPerfTimer& Src) <br />
{ <br />
m_hMutex = CreateMutex(NULL,FALSE,"");<br />
Copy(Src); <br />
}<br />
<br />
virtual ~CPerfTimerT() <br />
{ CloseHandle(m_hMutex); }<br />
<br />
const CPerfTimerT& operator=(const CPerfTimerT& Src)
{<br />
Copy(Src);<br />
return *this; <br />
}<br />
<br />
virtual void Lock() const { WaitForSingleObject(m_hMutex,10000); } <br />
virtual void Unlock() const { ReleaseMutex(m_hMutex); } <br />
private:<br />
HANDLE m_hMutex;<br />
};<br />
<br />
inline void CPerfTimer::Init(BOOL bStart)<br />
{<br />
if (!m_Freq) <br />
{
QueryPerformanceFrequency((LARGE_INTEGER *)&m_Freq); <br />
if (!m_Freq)<br />
m_Freq = 1;
m_Start = 0; <br />
m_Adjust = 0; <br />
Start();
Stop(); <br />
m_Adjust = m_Start;<br />
}<br />
m_Start = 0; <br />
if (bStart)<br />
Start(); <br />
}<br />
<br />
inline CPerfTimer::CPerfTimer(const CPerfTimer& Src) <br />
{<br />
Copy(Src);<br />
}<br />
<br />
inline void CPerfTimer::Copy(const CPerfTimer& Src)<br />
{<br />
if (&Src == this) <br />
return;
Src.Lock();<br />
Lock();<br />
m_Start = Src.m_Start; <br />
Unlock();<br />
Src.Unlock();<br />
}<br />
<br />
inline void CPerfTimer::Start(BOOL bReset) <br />
{
__int64 i;<br />
QueryPerformanceCounter((LARGE_INTEGER *)&i);<br />
Lock();<br />
if ((!bReset) && (m_Start < 0))<br />
m_Start += i;
else <br />
m_Start = i;
Unlock();<br />
} <br />
<br />
inline void CPerfTimer::Stop() <br />
{
Lock();<br />
if (m_Start <= 0)<br />
{<br />
Unlock();<br />
return;
}<br />
__int64 i;<br />
QueryPerformanceCounter((LARGE_INTEGER *)&i); <br />
m_Start += -i;
if (m_Start < m_Adjust)
m_Start -= m_Adjust;
else <br />
m_Start = 0;
Unlock();<br />
} <br />
<br />
inline BOOL CPerfTimer::IsRunning() <br />
{
Lock();<br />
BOOL bRet = (m_Start > 0);
Unlock();<br />
return bRet; <br />
}<br />
inline const double CPerfTimer::Elapsed()<br />
{
CPerfTimer Result(*this);<br />
Result.Stop();<br />
return (double)(-Result.m_Start)/(double)m_Freq; <br />
}<br />
<br />
inline const double CPerfTimer::Elapsedms() <br />
{
CPerfTimer Result(*this);<br />
Result.Stop();<br />
return (-Result.m_Start*1000.0)/(double)m_Freq; <br />
}<br />
<br />
inline const double CPerfTimer::Elapsedus() <br />
{
CPerfTimer Result(*this);<br />
Result.Stop();<br />
return (-Result.m_Start * 1000000.0)/(double)m_Freq; <br />
}<br />
<br />
<br />
inline const CPerfTimer& CPerfTimer::operator=(const CPerfTimer& Src) <br />
{<br />
Copy(Src);<br />
return *this; <br />
}<br />
<br />
<br />
inline CPerfTimer CPerfTimer::operator+(const CPerfTimer& Src) const<br />
{<br />
CPerfTimer Result(*this);<br />
Result += Src; <br />
return Result; <br />
}<br />
<br />
inline CPerfTimer CPerfTimer::operator-(const CPerfTimer& Src) const<br />
{<br />
CPerfTimer Result(*this);<br />
Result -= Src; <br />
return Result; <br />
}<br />
<br />
inline const CPerfTimer& CPerfTimer::operator+=(const CPerfTimer& Src)<br />
{<br />
CPerfTimer SrcStop(Src);
SrcStop.Stop();<br />
Lock();<br />
m_Start += SrcStop.m_Start;<br />
Unlock();<br />
return *this; <br />
}<br />
<br />
inline const CPerfTimer& CPerfTimer::operator-=(const CPerfTimer& Src)<br />
{<br />
CPerfTimer SrcStop(Src);
SrcStop.Stop();<br />
Lock();<br />
m_Start -= SrcStop.m_Start; <br />
Unlock();<br />
return *this; <br />
}<br />
<br />
inline CPerfTimer CPerfTimer::operator+(const double Secs) const<br />
{<br />
CPerfTimer Result(*this);<br />
Result += Secs; <br />
return Result; <br />
}<br />
<br />
inline CPerfTimer CPerfTimer::operator-(const double Secs) const<br />
{<br />
CPerfTimer Result(*this);<br />
Result += Secs; <br />
return Result; <br />
}<br />
<br />
inline const CPerfTimer& CPerfTimer::operator+=(const double Secs)<br />
{<br />
Lock();<br />
m_Start -= (__int64)(Secs*(double)m_Freq);<br />
Unlock();<br />
return *this; <br />
}<br />
<br />
inline const CPerfTimer& CPerfTimer::operator-=(const double Secs)<br />
{<br />
Lock();<br />
m_Start += (__int64)(Secs*(double)m_Freq);<br />
Unlock();<br />
return *this; <br />
}<br />
<br />
<br />
<br />
inline BOOL CPerfTimer::operator<(const CPerfTimer& Src)<br />
{ <br />
BOOL bRet; <br />
CPerfTimer Temp(Src);<br />
Lock();<br />
if (m_Start <= 0)<br />
{<br />
Temp.Stop();<br />
bRet = (m_Start > Temp.m_Start); <br />
Unlock();<br />
return bRet;<br />
}<br />
else<br />
if (Temp.m_Start > 0)<br />
{<br />
bRet = (m_Start < Temp.m_Start); <br />
Unlock();<br />
return bRet;<br />
}<br />
else<br />
{<br />
Unlock();<br />
CPerfTimer ThisStop(*this);<br />
ThisStop.Stop();<br />
return (ThisStop.m_Start > Temp.m_Start); <br />
}<br />
}<br />
<br />
inline BOOL CPerfTimer::operator>(const CPerfTimer& Src)<br />
{ <br />
BOOL bRet; <br />
CPerfTimer Temp(Src);<br />
Lock();<br />
if (m_Start <= 0)<br />
{<br />
Temp.Stop();<br />
bRet = (m_Start < Temp.m_Start); <br />
Unlock();<br />
return bRet;<br />
}<br />
else<br />
if (Temp.m_Start > 0)<br />
{<br />
bRet = (m_Start > Temp.m_Start); <br />
Unlock();<br />
return bRet;<br />
}<br />
else<br />
{<br />
Unlock();<br />
CPerfTimer ThisStop(*this);<br />
ThisStop.Stop();<br />
return (ThisStop.m_Start < Temp.m_Start); <br />
}<br />
}<br />
<br />
inline BOOL CPerfTimer::operator<=(const CPerfTimer& Src)<br />
{ <br />
return !(*this > Src);<br />
}<br />
<br />
inline BOOL CPerfTimer::operator>=(const CPerfTimer& Src)<br />
{ <br />
return !(*this < Src);<br />
}<br />
<br />
inline BOOL CPerfTimer::operator<(const double Secs)<br />
{ <br />
BOOL bRet; <br />
Lock();<br />
if (m_Start <= 0)<br />
{<br />
bRet = (m_Start > (__int64)(-Secs*(double)m_Freq)); <br />
Unlock();<br />
return bRet;<br />
}<br />
else<br />
{<br />
Unlock();<br />
CPerfTimer ThisStop(*this);<br />
ThisStop.Stop();<br />
return (ThisStop.m_Start > (__int64)(-Secs*(double)m_Freq)); <br />
}<br />
}<br />
<br />
inline BOOL CPerfTimer::operator>(const double Secs)<br />
{ <br />
BOOL bRet; <br />
Lock();<br />
if (m_Start <= 0)<br />
{<br />
bRet = (m_Start < (__int64)(-Secs*(double)m_Freq)); <br />
Unlock();<br />
return bRet;<br />
}<br />
else<br />
{<br />
Unlock();<br />
CPerfTimer ThisStop(*this);<br />
ThisStop.Stop();<br />
return (ThisStop.m_Start < (__int64)(-Secs*(double)m_Freq)); <br />
}<br />
}<br />
<br />
inline BOOL CPerfTimer::operator<=(const double Secs)<br />
{ <br />
return !(*this > Secs);<br />
}<br />
<br />
inline BOOL CPerfTimer::operator>=(const double Secs)<br />
{ <br />
return !(*this < Secs);<br />
}<br />
<br />
<br />
#endif //__PERFTIMER_H__
daemone
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daemone wrote: I want to use this timer class for precise data sampling and display the sampled data in strip chart of a dialog time by time
such as 10us a data will be display on strip chart.
below is the class code written by Dean Wyant
1. This is no good habit to post a complete piece of code into a forum, it is a waste.
2. And your question is ...?
~RaGE();
I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus
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Oh, sorry, I will be care next time!
My question is that I want to use CPerftimer class instead of System timer(using Settimer()), because I want to sampling data very precisely.
As we all know, We use OnTimer() function to handle the System timer overflow message, and in Ontimer function, we can add our code. but for a CPerftimer , it is created by user, how to handle its overflow function, so that I can add my sampling data instrunction into the handle function.
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What your problem? and I think its not good idea to post a long code
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Hello,
I was hoping you could help explain my compile error in using 'const'.
I have an array defined as
<br />
const char* const letters[] = {"one", "two"};<br />
where 'const char*' means I have my elements as constant charcter ptrs (so they can't point to anything else) and 'const letters[]' meaning I have an array of fixed length (I hope that that was correct?). 
So I wish to define a ptr at the 1st element and I use
<br />
const char* i = letters;<br />
meaning I want a constant ptr of type char pointing to the 1st element. But I keep getting this compiles error
"cannot convert from 'const char* const[2]' to 'const char*'
If anyone can give me an explanation then that would be great.
Thanks !
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This is not because of the const keyword but because the two types are unrelated: char* i is a pointer to a char array and char* letter[] is an array of pointer to char arrays. So you one is a simple pointer and this other one is an array of pointer. You should do something like this: const char* i = letters[0]; instead
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Thank you for that. It worked!  I was wondering was I right in my comments on the 2 uses of const in the array def.?
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minkowski wrote: I was wondering was I right in my comments on the 2 uses of const in the array def.?
Yes, it is correct.
~RaGE();
I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus
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But I thought that if you refer to an array without the [] its just referring to the 1st element in the array which is equivalent to writing
<br />
const char *p = arr;<br />
which is the same as
<br />
const char *p = arr[0];<br />
but I get a compile error 
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minkowski wrote: But I thought that if you refer to an array without the [] its just referring to the 1st element in the array
Not at all: you refer to the address of the first element, which is totally different.
Example: if you have an integer array:
int pIntArray[5];
for (int i=0;i<5;i++)
pIntArray[i] = i;
int Test = pIntArray[0];
int Test2 = pIntArray;
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i understand your example, but const char *i is a ptr and needs to point to the address of an object so why not assign it to the address of the 1st element of the array?
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Because in your example, letters is an array of pointers. Which means that the pointer to the first element of the array is in fact a pointer to a pointer of char array, and not a pointer to a char array. There is one level of indirection more.
In brief, letters is equivalent to char** and i is equivalent to char* (removing the const because that's not part of the problem). So you see, the two pointers are not the same (remember that C++ is a strongly typed language so you won't be able to save a pointer to another one if they are not exactly the same type).
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Ah, ok. now i get it.
thanks for the explanatioN!
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Actually, these are equivalent:
const char *p = arr;
const char *p = &arr[0];
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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Hi,
I'm using a static splitter window in my SDI application. But I want the size of the panes to be constant and dont want the user to change the size of the splitter windows by using the splitter bar.anybody know how to do it
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Derive your own splitter window class, say CSplitterWndEx and override the NcHitTest handler. Here comment out the code written by the appwizard i.e. do not call the base class, before that only return TRUE from the function.
This will take care of your problem
Sunil
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Is it not possible to handle the normal "OnSize" of the pane and refuse it ?
~RaGE();
I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus
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OnSize is sent when the size has already changed. So, it is easier to simply not allow to change the size.
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Also, by overriding OnNCHittest the cursor will not change to the resizing cursor. No use giving the user a visual clue that there is resizing and then disallowing it.
You may be right
I may be crazy
-- Billy Joel --
Within you lies the power for good, use it!!!
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The current header file i have (Winsvc.h) neither contain a definition of the structure "SERVICE_STATUS_PROCESS" nor the function "QueryServiceStatusEx(...)".
I am using Visual C++ 6.0.
Can any body help me with that?
Best Regards,
Simos
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softgrid wrote: The current header file i have (Winsvc.h) neither contain a definition of the structure "SERVICE_STATUS_PROCESS" nor the function "QueryServiceStatusEx(...)".
I am using Visual C++ 6.0.
Can any body help me with that?
Well the documentation says this...
Requirements
Windows NT/2000/XP: Included in Windows 2000 and later.
Header: Declared in Winsvc.h; include Windows.h.
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Download and install a NEWER version of the Platform SDK and make VC point at the new libs and headers - your problem will be solved.
The original VC++ headers and libs were out before some of these newer functions, so it is not found in the WinSvc.H that you posess.
If you DO find it in your header, check for it bracketed by a WIN32 definition.
You need to do something like
#define _WIN32 0x0501
or some such value to make it visible.
They did this so you could target backlevel versions of OS with a build and be warned if you were 'linking' to functions that did not exist at the time.
Any sufficiently gross incompetence is nearly indistinguishable from malice.
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Hi everyone,
since few weeks i look for a solution for my problem.
I like to open my MDI Children with Parameters.
For example if i click an element in a list, his ID will be the parameter for the new Child ( or another view with the details of this ID )
So, the new View must known which ID will be loaded...
Whats the best procedure ?
Big thanks
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baerten wrote: Whats the best procedure
Override your base view class, and add a parameter in the overriden "Create" function to pass the ID.
~RaGE();
I think words like 'destiny' are a way of trying to find order where none exists. - Christian Graus
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