LeaveCriticalSection

Hi,

I was wondering what happens if I call LeaveCriticalSection API without calling first EnterCriticalSection

Another thing does EnterCriticalSection/LeaveCriticalSection throws an exception (C++ exceptions) if needed

Thanks in advance
avi123

its now ok dont do it, here is what the MSDN says

"If a thread calls LeaveCriticalSection when it does not have ownership of the specified critical section object, an error occurs that may cause another thread using EnterCriticalSection to wait indefinitely"

before you EnterCriticalSection () call TryCriticalSection () to watch if you can gain ownership.

if i helped dont forget to rate :-)

Cheers

Thank Golan, I read it too in the MSDN

the thing is that I want to put in try catch and I don't know if I get to the catch if the critica section was already enter or not I guess then I can use TryEnterCriticalSection

Thanks
Avi123

A try/catch won't help you much on an entirly C based API :). But __try/__except may help you.

Quote:

---

Originally Posted by avi123

I was wondering what happens if I call LeaveCriticalSection API without calling first EnterCriticalSection

---

Why would you want to do this? :confused:

There have to be ways to avoid this situation at all costs.

Exception handling is meant for 'exceptional' (non-expected) situations. It's not meant to compensate for incorrect programming practices. ;)

Here the problem has been identified.
You should attempt fixing it at it's very roots.

Quote:

---

Originally Posted by avi123

the thing is that I want to put in try catch and I don't know if I get to the catch if the critica section was already enter or not I guess then I can use TryEnterCriticalSection

---

Maybe you can do something like this:

Code:

---

__try
{

    */
        some code that might throw an exception
    */

    // enter a nested try-finally for your synchronized code
    __try
    {
        EnterCriticalSection(...);

        */
            more code that might throw an exception
        */
    }
    __ finally
    {
        LeaveCriticalSection(...);
    }
}
__except(1)
{
    // handle exceptions here...
}

---

- petter

Thank you all
How do I know if EnterCriticalSection failed?
If I want to put it in __try __except what should I except (I mean catch)

what I mean is

__try
{
EnterCriticalSection(m_myCriticSec)

}

__except(/* what should I put in here*/)
{


}

and what can I do if the LeaveCriticalSection fails, Am I stuck I mean the critical section can't be released

Thanks
Avi123

Use code tags when posting code!

• Check MSDN on __try/__except

http://msdn.microsoft.com/library/de...calsection.asp

MSDN is your freind ^_^ (sometimes :\)