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MyASPN >> Mail Archive >> boost
boost
RE: [boost] Re: boost::execution_monitor impl under windows
by carlos pizano other posts by this author
Sep 21 2003 6:08PM messages near this date
RE: [boost] Re: boost::execution_monitor impl under windows | RE: [boost] Re: boost::execution_monitor impl under windows
Dave Abrahams wrote:
>  No, I'm disabling the warning with pragmas.  The technique works fine.

I don't think so. Well, it can fail. See Carl Daniel post on 9/21. I saw
the thread(s) on comp.lang.c++.moderated about the subject but nobody
mentioned the interaction of the *technique* with /EHs at that time.

Here is where I am going with this. The current way, complied with /EHs
seems to me that can be better done with something along the lines of:

execute() 
{

__try
{
	try
	{
		user_function();
	}
	catch( specific_type1& )
	{
		report1(text);
	}
	catch( specific_type2& )
	{
		report2(text);
	}
	... other type specific catch(s) here..
	
	... do not put catch(...) here ever..
}
__except ( filter(GetExceptionInformation()) )
{
	report_def()
}

} // end of function

/* take the above code at the pseudo-code level */

Now, inside filter() you can do interesting things for instance
re-throwing the SE under certain conditions or checking for the magic
number that says that the SE is really a C++ exception and maybe do your
trick...

Note that the code above will be done in two nested calls since VC does
not
Allow you to mix __try and try on the same function.

There seems to be very little restrictions on what filter() can be, I
wonder
if we can make it dispatch to a virtual function so a derived class can
customize the behaviors.

Think about it.

CPU

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