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pandit84 wrote:
Why those threads without printf statement take much time to execute.
I don't know what OS you are using but I will give you a Windows NT kernel answer. Its because the kernel scheduler is waiting for the threads to become eligible for a context switch. When the threads performing printf have completed I/O they become immediately eligible for a context switch. The threads in a busy loop consume more time because the process scheduler is waiting for what it considers *work* do be done. However since they are inside infinite do-nothing loop they will comsume an entire time slice.
What OS did you test this on? The process scheduler has evolved alot and on Microsoft Vista and above and I believe the threads performing I/O will recieve priority boost.
Best Wishes,
-David an eluDe
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Hi,
I am trying to download a zip file from server using CInternetSession. But i am getting incorrect size from server.
My application is unicode and code as below:
pConnection = session.GetHttpConnection((LPCTSTR)strServerName, (INTERNET_PORT)nPort);
LPCTSTR pstrAcceptTypes = NULL;
LPCTSTR pstrVersion = NULL;
pHttpFile = pConnection->OpenRequest(CHttpConnection::HTTP_VERB_GET, strObject, NULL, 1, &pstrAcceptTypes, pstrVersion, HttpRequestFlags);
pHttpFile->AddRequestHeaders(szHeaders);
pHttpFile->AddRequestHeaders(_T("User-Agent: GetWebFile/1.0\r\n"), HTTP_ADDREQ_FLAG_ADD_IF_NEW);
pHttpFile->SendRequest();
pHttpFile->QueryInfoStatusCode(dwRet);
int nFileLen = pFile->GetLength();
why I am getting incorrect size? Anything wrong in this code?
Same code was working with ANSI build and not working with unicode build.
modified on Thursday, January 13, 2011 5:43 AM
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john5632 wrote:
int nFileLen = pFile->GetLength();
where is pFile defined and initialised? It does not appear in this code snippet.
I must get a clever new signature for 2011.
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sorry this is
pHttpFile->GetLength();
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Sorry, no idea, but maybe you should be looking at the information returned from your server.
[edit]Google found this[^], it may help.[/edit]
I must get a clever new signature for 2011.
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Previously code was in ANSI and working fine but now I converted it to UNICODE and getting this issue.
Any problem with API to transdfr the string to server into UNOCODE format?
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john5632 wrote: Any problem with API to transdfr the string to server into UNOCIDE format?
Assuming both ends are working in Unicode there should be no problems. You need to check both ends are following the same rules.
I must get a clever new signature for 2011.
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Is the incorrect size comes in debug version? Please run in release mode and analyze nFileLen by means of messagebox or some thing else.
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i wanted to create dynamically popupmenu on clicking rightclick... the item may very more than thousands worst case otherwise hundreds only. Is it possible?
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yogish293 wrote: s it possible?
Did you try?
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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For how long are you going to repost the same question ? You already got a lot of answers suggesting that it was a very bad design. Why don't you look at it from the user point of view and see if you can't use a more user-friendly approach ?
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How much more information do you need on this? You have already been shown:
- This is not a good design, and you should consider alternatives.
- If you insist on doing it this way then you probably need to use a virtual menu - i.e. owner drawn.
I must get a clever new signature for 2011.
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In that case instead of using regular menu , create a WS_POPUP style window, and handle the drawing and messages for performance improvement.
If u can Dream... U can do it
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I guess you have to back to your class because its not a problem its very a basic question to write it,I think you dont know this secret(we have a site on the net its name is codeproject it has many articles(about menus and pop up menus,....)
Please dont read this post its a secret.
Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )
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Anything is possible; the question is: IS IT FEASABLE?
Why would you want to create menu with hundreds, not to mention thousand items. Put yourself in a position of a user of your application and imagine browsing hundreds of items to find one to choose.
You have to rethink your design.
JohnCz
MS C++ MVP
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I am running my code in Winodws 7. I am using MessageBox() but it's not showing in the screen. The control is reaching there.
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This is a very vague description.
You could try setting the hWnd parameter to HWND_DESKTOP.
Or Open Spy++ (aka SpyXX) from the Vistual Studio Tools Menu. Then find your application window in the Windows page. The message box should be a child window of the window you provide to the hWnd parameter
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is it a windows service you are writing?
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Whats the return value of MessageBox?
Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )
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Hi all,
I have 2 hard disk in my system. I want to get Logical drives of both hard drives i.e. Physical drive 1 contains c: and e: partitions and Physical drive 2 contains d: f: and g: partitions. I have used this code to get the hard disk details.... but it is giving wrong result....
TCHAR szTemp[BUFSIZE];
szTemp[0] = '\0';
if (GetLogicalDriveStrings(BUFSIZE-1, szTemp))
{
TCHAR szName[MAX_PATH];
TCHAR szDrive[MAX_PATH] = TEXT(" :");
BOOL bFound = FALSE;
TCHAR* p = szTemp;
do
{
*szDrive = *p;
if (QueryDosDevice(szDrive, szName, BUFSIZE))
{
CString str = szDrive;
str = str+szName;
m_Tree_Ctrl.InsertItem(str,root,TVI_LAST);
}
while (*p++);
} while (!bFound && *p);
}
m_Tree_Ctrl.Expand(root,TVE_EXPAND);
It is making a tree like
Drives
C:\Device\Harddiskvolume1
D:\Device\Harddiskvolume2
E:\Device\Harddiskvolume3
.
.
.
I am not getting what exactly is the problem...
Can anybody help me in this...
Thanks in advance
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#include <windows.h>
#include <stdio.h>
LPCSTR FormatSize(QWORD nSize) {
static char szSize[16];
if (nSize < 1024) {
sprintf(szSize, "%uB", nSize);
} else {
char szScales[] = "KMGTPEZY";
int nScale = 0;
for (; nScale < sizeof(szScales); ++nScale) {
if (nSize < 1024 * 1024) {
sprintf(szSize, "%6.2f%cB", nSize / 1024.0f, szScales[nScale]);
break;
}
nSize = (nSize + 512) / 1024;
}
if (nScale == sizeof(szScales)) {
strcpy(szSize, "Unknown Size");
}
}
return szSize;
}
void PrintDrives(char *szDrives) {
DWORD nDrives = GetLogicalDrives();
char szDrive[] = "A:\\";
char szDriveName[MAX_PATH + 1];
int nPrintedDrives = 0;
while (nDrives != 0) {
if (nDrives & 1) {
szDrives[nPrintedDrives] = szDrive[0];
GetVolumeInformation(szDrive, szDriveName, sizeof(szDriveName), NULL, NULL, NULL, NULL, 0);
QWORD nAvaliable;
QWORD nTotal;
QWORD nFree;
if (!GetDiskFreeSpaceEx(szDrive, (PULARGE_INTEGER)&nAvaliable, (PULARGE_INTEGER)&nTotal, (PULARGE_INTEGER)&nFree)) {
nAvaliable = 0;
nTotal = 0;
nFree = 0;
}
if (*szDriveName == 0) {
if (nTotal > 0) {
printf("%s (%s)\n", szDrive, FormatSize(nTotal));
} else {
printf("%s (Unknown Size)\n", szDrive);
}
} else {
if (nTotal > 0) {
printf("%s (%s) [%s]\n", szDrive, FormatSize(nTotal), szDriveName);
} else {
printf("%s (Unknown Size) [%s]\n", szDrive, szDriveName);
}
}
}
nDrives >>= 1;
++szDrive[0];
}
}
int main(int argc, char *argv[]) {
char szDrives[27];
szDrives[26] = 0;
PrintDrives(szDrives);
return 0;
}
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How do I terminate a thread from outside of that thread.
My thread contains some function iand it takes some time to finish it .
i want when i send signal to stop thread its should stop immedeatily.
CWinThread *Th;
Th = AfxBeginThread( RUNTIME_CLASS(CTest_Thread),THREAD_PRIORITY_NORMAL,0,CREATE_SUSPENDED,NULL);
if (NULL != Th)
{
Th >ResumeThread();
}
Th ->PostThreadMessage(WM_QUIT,NULL,NULL);
after using postthreadmessage to exit its not stop the thread immediately and its takes full time to perform thread functioning than stop and exit this.
so please tell me how can i stop the thread imeediately from outside of thread.
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You define your own custom message and then override CWinThread::PreTranslateMessage http://msdn.microsoft.com/en-US/library/67d74wsy(v=VS.80).aspx[^].
The thread intercepts messages before your main application does, so you cannot use WM_QUIT or other windows messages without affecting your application.
in the header file
#define CM_KILL_THREAD WM_USER + 0 //can go up to WM_USER + 0x7BFF
class CTest_Thread : public CWinThread {
protected:
virtual BOOL PreTranslateMessage(MSG *pMsg);
};
in the source file
BOOL CTest_Thread::PreTranslateMessage(MSG *pMsg) {
if (pMsg->message == CM_KILL_THREAD) {
ExitThread(0);
return TRUE;
}
return FALSE;
}
in your code
Th->PostThreadMessage(CM_KILL_THREAD, 0, 0);
Edit: corrected invalid indentation error
modified on Thursday, January 13, 2011 1:24 AM
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