|
In ansi C you allocate memory with
malloc();
and after usage you free the allocated memory with
free();
|
|
|
|
|
erm ...
look at malloc and free ( and associated function, calloc, realloc, ... )
Maximilien Lincourt
"Never underestimate the bandwidth of a station wagon filled with backup tapes." ("Computer Networks" by Andrew S Tannenbaum )
|
|
|
|
|
loud and clear. doing it as we speak.
|
|
|
|
|
For example:
..... // Create 2 threads and save their handles to hThread1, hThread2
rgHandles[0] = hThread1;
rgHandles[1] = hThread2;
while (TRUE)
{
dwIndex = ::WaitForMultipleObjects(2, rgHandles, FALSE, INFINITE);
dwIndex -= WAIT_OBJECT_0;
...... // farther process at here
}
When the thread1 is terminated, the state of thread1 is set to signaled,
then WaitForMultipleObjects() returns the index 0 of the array.
But when the thread2 is terminated, the WaitForMultipleObjects() still returns
the index 0 not index 1.
I want WaitForMultipleObjects() to return the correct index, so I can process for this terminated thread.
who can help me?
Thanks a lot
|
|
|
|
|
Jin Yao wrote:
But when the thread2 is terminated, the WaitForMultipleObjects() still returns
the index 0 not index 1.
Are you sure that thread1 hasn't also terminated at the same time as thread2?
|
|
|
|
|
At the first time, thread1 terminates and WaitForMultipleObjects() returns the WAIT_OBJECT_0 + 0. The state of thread1 object is set to signaled.
When the thread2 ends, the thread2 object will also be set to signaled.
but at that time, the state of thread1 object is already signaled. So WaitForMultipleObjects() still returns the WAIT_OBJECT_0 + 0 not WAIT_OBJECT_0 + 1.
I wish WaitForMultipleObjects() can return the WAIT_OBJECT_0 + 1 when
thread2 ends.
Thanks
|
|
|
|
|
when a thread in the handle array becomes signalled and the wait satisfied,
handle the case and then remove that handle from the array (dec. the count,
shift over remaining handles as required..) That handle will remain valid
and signalled until you call CloseHandle on it, so you must remove it from
the wait.
|
|
|
|
|
Hi,
I'm new to all this Home Automation stuff, I would like to know if there are some libraries available ( in C++ or C#) for receiving and sending signals through this protocols ( or any wireless), or which vendors of components give some ActiveX or Dll's stuff to programmatically handle their controls.
Thanks in advance, Greetings
Braulio
|
|
|
|
|
Is there an easy way to format "1000000" so it would appear as "1,000,000"?
I know that the ',' depends on the locale so there should be a way...
Thanks
|
|
|
|
|
|
|
 I have a Combo Box als Drop List from 1 to ...10 and a Control edit field.
I want to insert for each combo Box List a Number from Control Edit; just like to save Elements in Array.
For example: for 1 -----> 20.2
for 2------->7.7
for 3---->2.0
...
but if i return to 1 Index my element ist stored as 20.2 ans so ...
How can i do that??
Best Reguards!
|
|
|
|
|
 Huh?
Can you rephrase what you are trying to do?
Who is 'General Failure'? And why is he reading my harddisk?!?
|
|
|
|
|
i have a Combo box listed from 1 to 10, and if i insert a number in Edit control it will be refered to combo box index.
just like array a1-->3.5
a2-->7.5
...
a10-->32.5
a1...a10 index of Combo box
Edit control field changed.
Thanks
|
|
|
|
|
So, you mean your combobox opens initially with a list box containing numbers 1..10.
The user can then change (using the Edit field) e.g. the 1 into a 0.5, the 2 into a 1, the 3 into a 1.5 etc.
Is that what you want?
If yes, you probably need to implement a map from combobox-indices to the (number-)strings to display.
You then need to InsertString() the (number-)strings into the relevant place of the combobox.
But I must admit that I never did this myself. So my help may be limited 
Who is 'General Failure'? And why is he reading my harddisk?!?
|
|
|
|
|
Hi friends!
I need to use a dll whose VC++ project I don´t have. Because the names of the dll are "mangled" I should use the library in the "__declspec(dllimport) ..." way. But I don´t have the .lib file needed for it, how can i create this file from my .dll file?
I´ve been looking the "lib" command reference in msdn, but the exectution of this tool gives me nothing: no errors, no warnings, no output files.
Does anybody know another tool, or the correct parameters for the "lib" tool?
Thanks in advance.
"When I look into your eyes, there´s nothing there to see, nothing but my own mistakes staring back at me"
|
|
|
|
|
If you don't have the lib file, you can always use the LoadLibrary() and GetProcAddress() functions.
Roger Stewart
"I Owe, I Owe, it's off to work I go..."
|
|
|
|
|
can we create the auto-start NT service?
I mean the service that starts even when I don't login the system.
CreateService can do it?
Then how?
Thank you.
Thanks.
|
|
|
|
|
Hendy_So wrote:
CreateService can do it?
Yes, specify the "SERVICE_AUTO_START" flag when calling CreateService.
Or you can use the "Administrative Tools" to configure a service to be started automatically at boot time, just select "Services" and double click your service from a list. If you are using Windows NT 4.0, then you have to use control panel to do this.
My articles and software tools
|
|
|
|
|
you are right.thank you.
i supposed it couldn't work.because it can't be debuged and i have no idea whether it will start before login.
so you are chinese too?from your name and your signature,i guess.
从你的名字，和你的签名档来看，应该是吧。呵呵。
Greeting from China.
|
|
|
|
|
Hi,
I'm currently writing some code for the manipulation of *.wav data and i want to use my algorithms for mp3 files too. I need something that loads a mp3 file to wav like uncompressed data. Something like:
Function(char *cMP3FileName,void **DataBuffer,int *iBufLen,WAVHEADER *whHeader);
can anyone give me a hint?
greets,
Jason
|
|
|
|
|
i want to do a project on VoIp using TAPI After having some basic knowledge.
pls tell me from where i can take start.
Faizi
|
|
|
|
|
I want to add the following behaviour to CDateTimeCtrl:
show the embedded month calender control when the user double clicks on the editbox of the datetime control.
So double-clicking on the datetime control would give the same result as clicking on the drop-down button on the right.
Don't ask me why, this is actually a request by a customer.
how should I accomplish this behaviour?
Any help is appreciated.
|
|
|
|
|
I know this is a relatively irrelevant issue but it's been in my mind for long time: while in stardard C we use bool for the "true-or-false" value, in MFC we see BOOL instead, which is in fact a typedef of 32 bit int on win32 plateform(I think). Now my question is why.
Seeing that in contrast with bool, BOOL does:
1, Occupy more memory storage, four bytes instead of one, not that matters a lot, but after all one has always been smaller than four since the first day when the human being could count.
2, Have pseudo-ambiguous data type comparing to bool, I said "pseudo" because the ambiguity is not for the compiler, but for the programmers themselves. In common sense I would think void Func(BOOL bVal) and void Func(int nVal) are different functions but they are in fact the same, so doing such overloading would generate compiler error. However, void Func(bool bVal) and void Func(int nVal) are indeed different and can be overloaded each other. Which one makes more sense to us?
Perhaps BOOL was introduced due to the fact that C++ allows an integer value to be treated as a "true-or-false", so without BOOL, then if (65535 * 2) { ...; } would generate a "data truncate" warning since a one-byte bool could not hold value of "65535 * 2", thus they came up with such a new BOOL which is capable of holding larger values. Hehe, personally, I never exam a pointer using if (p) { ...; }, I always use if (p != NULL) { ...; } instead, which I think is a better practice.
Anyway, I just couldn't see the necessity of BOOL even though I've been using BOOL in MFC applications for years.
|
|
|
|
|
I believe that prior to the C++98 standard, which MFC pre-dates, there was no "standard" built-in boolean type in C++ so MS defined their own (as many did back then).
Im not sure when C got the built-in boolean type bool (if it does), probably in C99, otherwise C++98 should have had it pre-98.
“Our solar system is Jupiter and a bunch of junk” - Charley Lineweaver 2002
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
