C / C++ / MFC Discussion Boards

Another way to kill process other than terminate??

Anonymous29-Jun-04 2:09

Anonymous

29-Jun-04 2:09

Is there a way to kill a another process from within your process other than TerminateProcess??? Thanks.

Re: Another way to kill process other than terminate??

rrrado29-Jun-04 3:49

rrrado

29-Jun-04 3:49

You should signal your thread that you want it to finish by sending message, or using some signaling object, so that your thread could make neccessary cleanup before exitting

rrrado

Re: Another way to kill process other than terminate??

palbano29-Jun-04 4:29

palbano

29-Jun-04 4:29

You mean like using IPC? That would be the preferred method but that assumes known interfaces etc.

"No matter where you go, there your are." - Buckaroo Banzai

-pete

How to send a signal to another process???

Anonymous29-Jun-04 2:01

Anonymous

29-Jun-04 2:01

Is there a way to send a signal to one process from another process. I know you can call "raise(SIGINT)" to send a signal to your own process. Can one re-direct a signal to another process?

Re: How to send a signal to another process???

RadioShark29-Jun-04 2:10

RadioShark

29-Jun-04 2:10

Hi,

Did you try ResetEvent(), SetEvent(), WaitForSingleObject() ?

Sincerely Yours,
RadioShark

Re: How to send a signal to another process???

A T I F29-Jun-04 2:49

A T I F

29-Jun-04 2:49

ResetEvent(), SetEvent(), WaitForSingleObject() don't they work for thread...??

I think mutex is the solution....

Re: How to send a signal to another process???

#realJSOP29-Jun-04 2:31

#realJSOP

29-Jun-04 2:31

You could use the WM_COPYDATA mechanism, but you need to have the hwnd of the process you want to signal.

------- sig starts

"I've heard some drivers saying, 'We're going too fast here...'. If you're not here to race, go the hell home - don't come here and grumble about going too fast. Why don't you tie a kerosene rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt

"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

how to read a text from a file??????Help!!!!!!!!!

rogerlew29-Jun-04 0:41

rogerlew

29-Jun-04 0:41

i hope can someone help me in this project.....
firstly i want to know how to read a text from a file...
after that convert the text to lowercase or uppercase...
than count the probability of the word that appear in the text......

Re: how to read a text from a file??????Help!!!!!!!!!

Antony M Kancidrowski29-Jun-04 1:02

Antony M Kancidrowski

29-Jun-04 1:02

Reading files look at CFile

For string manipulation look at CString, it can covert to upper / lower and has Find functionality in order to match partial strings (words) within other strings (text).

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fuity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

Re: how to read a text from a file??????Help!!!!!!!!!

Manfred Staiger29-Jun-04 1:12

Manfred Staiger

29-Jun-04 1:12

Assuming you want to use MFC:

CStdioFile file;
BOOL eof=TRUE;
CString lineOfText;

//See CFile and CStdioFile documentation in MSDN for other Open() options
file.Open("C:\\pathToYourFile\\filename.txt", CFile::modeRead);
while(eof==TRUE)
{
eof=file.ReadString(lineOfText);
lineOfText.MakeUpper();
lineOfText.MakeLower()
}
file.Close();

MS

Re: how to read a text from a file??????Help!!!!!!!!!

#realJSOP29-Jun-04 2:32

#realJSOP

29-Jun-04 2:32

Sounds like a homework assignment to me...

How about reading your textbook first?

------- sig starts

"I've heard some drivers saying, 'We're going too fast here...'. If you're not here to race, go the hell home - don't come here and grumble about going too fast. Why don't you tie a kerosene rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt

"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Re: how to read a text from a file??????Help!!!!!!!!!

Antony M Kancidrowski29-Jun-04 4:22

Antony M Kancidrowski

29-Jun-04 4:22

The thought crossed my mind. Then I thought, the hell with it, I will point them in the right direction today! Some reading would be required however Wink | ;)

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fuity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

How do you know if it's a file or directory

no_reg_name29-Jun-04 0:28

no_reg_name

29-Jun-04 0:28

Given a path e.g. c:\somedir1\somedir2\file.txt how can you find out if file.txt is a directory or a file?

Can't base the judgement on the extension, since there could be a directory named file.txt. Frown | :(

On a side note
I have an application that is using FindFirstFile and FindNextFile to enumerate all files and subdirectories in a given path.

Now I want to check if this given path is a pointing to a file, so I could ShellExecute the file, instead of calling the above functions. Smile | :)

Re: How do you know if it's a file or directory

Antony M Kancidrowski29-Jun-04 0:51

Antony M Kancidrowski

29-Jun-04 0:51

To check for directory you need to check the dwFileAttributes of the WIN32_FIND_DATA structure that you pass to FindFirstFile or FindNextFile

WIN32_FIND_DATA data;
...
// Is the found item a directory
if (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
...
}

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fuity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

Re: How do you know if it's a file or directory

Neville Franks29-Jun-04 0:51

Neville Franks

29-Jun-04 0:51

Test FindFirstFile() etc. WIN32_FIND_DATA.dwFileAttributes for FILE_ATTRIBUTE_DIRECTORY. Should do the trick.

Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com

Named pipes over different processes

A T I F29-Jun-04 0:24

A T I F

29-Jun-04 0:24

I am using the following code to create a named pipe

	<br />
SECURITY_ATTRIBUTES saPipeSecurity = {0};<br />
PSECURITY_DESCRIPTOR pPipeSD = NULL;<br />
<br />
if(lpSecurityAttributes == NULL)<br />
{<br />
	// alloc & init SD<br />
	if ( ! ( pPipeSD = ( PSECURITY_DESCRIPTOR) <br />
			( malloc ( SECURITY_DESCRIPTOR_MIN_LENGTH)) ) )<br />
			return FALSE;<br />
		<br />
	if ( ! InitializeSecurityDescriptor ( pPipeSD, <br />
			SECURITY_DESCRIPTOR_REVISION) )<br />
			return FALSE;<br />
		<br />
		// set NULL DACL on the SD<br />
	if ( ! SetSecurityDescriptorDacl ( pPipeSD, TRUE, ( PACL) NULL, FALSE) )<br />
			return FALSE;<br />
		<br />
		// now set up the security attributes<br />
	saPipeSecurity.nLength = sizeof ( SECURITY_ATTRIBUTES);<br />
	saPipeSecurity.bInheritHandle = TRUE; <br />
	saPipeSecurity.lpSecurityDescriptor = pPipeSD;<br />
<br />
	lpSecurityAttributes = &saPipeSecurity;<br />
}<br />
<br />
m_hPipe = ::CreateNamedPipe(pszPipeName, dwOpenMode, dwPipeMode, dwMaxInstances, <br />
		dwOutBufferSize, dwInBufferSize, dwDefaultTimeOut, lpSecurityAttributes);<br />

then I use a CreateProcessWithLogonW to spawn a new process that connect to this pipe using CreateFile. The createfile fails and return last error gives 5(access denied). Can anybody guess what I am doing wrong.

Re: Named pipes over different processes

lesnikowski29-Jun-04 1:39

lesnikowski

29-Jun-04 1:39

but what kind of a value does dwOpenMode have?

Access specified when a pipe is opened (CreateFile) must be compatible with the access specified in the dwOpenMode (CreateNamedPipe).

if PIPE_ACCESS_OUTBOUND or PIPE_ACCESS_INBOUND
you must call CreateFile with
GENERIC_READ, GENERIC_WRITE accordingly as dwDesiredAccess param.

Re: Named pipes over different processes

A T I F29-Jun-04 2:52

A T I F

29-Jun-04 2:52

thanks I was able to resolve that issue...now I am facing a new issue..CreateProcessWithLogonW call is taking too much time on a WinXP machine, but work fine of a Win2000...any ideas why?

upper limit for an array

Tomaz Rotovnik28-Jun-04 23:32

Tomaz Rotovnik

28-Jun-04 23:32

What is an upper limit for dynamic allocation of single array?

For an example:

int* A_of_int = new int[X];

What is upper value for X. The environment is visual studio 6 on windows platform (XP). I suppose one of the limits is memory size.

Re: upper limit for an array

Anders Molin29-Jun-04 1:34

Anders Molin

29-Jun-04 1:34

INT_MAX
And of course avaliable memory.

- Anders

Money talks, but all mine ever says is "Goodbye!"

ShotKeeper, my Photo Album / Organizer Application
[^]

My Photos[^]

Re: upper limit for an array

Tomaz Rotovnik29-Jun-04 3:47

Tomaz Rotovnik

29-Jun-04 3:47

Hi

Perhaps I'm wrong but INT_MAX is defined as maximum int value 2^31-1

What I need is maximum array size for type int

Is constant INT_MAX also used to define maximum array size for type int?

Tomaz Rotovnik

Re: upper limit for an array

Anders Molin29-Jun-04 3:52

Anders Molin

29-Jun-04 3:52

In reallity the avaliable memory is the only limit, as an array is just a pointer to some memory.

Why do you need this limit?

- Anders

Money talks, but all mine ever says is "Goodbye!"

ShotKeeper, my Photo Album / Organizer Application
[^]

My Photos[^]

Re: upper limit for an array

Tomaz Rotovnik29-Jun-04 4:13

Tomaz Rotovnik

29-Jun-04 4:13

I need an huge array and I want prevent application crash.

I think I found the answer:

max heap size is declared in malloc.h

/* Maximum heap request the heap manager will attempt */

#define _HEAP_MAXREQ 0xFFFFFFE0

Tomaz Rotovnik

Re: upper limit for an array

Anders Molin29-Jun-04 4:20

Anders Molin

29-Jun-04 4:20

Tomaz Rotovnik wrote:
#define _HEAP_MAXREQ 0xFFFFFFE0

That is 4GB, a lot more memory that most computers have...

If you use malloc to alloc your array, the app will not crash, but you will get a NULL pointer if it fails.

- Anders

Money talks, but all mine ever says is "Goodbye!"

ShotKeeper, my Photo Album / Organizer Application
[^]

My Photos[^]

Re: upper limit for an array

David Crow29-Jun-04 4:39

David Crow

29-Jun-04 4:39

Anders Molin wrote:
That is 4GB, a lot more memory that most computers have...

Even if the computer had 8GB of RAM, the memory manager only allows each process 2GB for its address space, or 3GB if the /3GB startup switch were used.

Anders Molin wrote:
...if it fails.

That should be "when it fails."

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.