They produce the same asm.

 

From: Ros-dev [mailto:[email protected]] On Behalf Of David Quintana 
(gigaherz)
Sent: 16 June 2014 11:10
To: ReactOS Development List
Subject: Re: [ros-dev] [ros-diffs] [hbelusca] 63599: [TASKMGR]: Use the EndTask 
API to kill tasks.

 

It's equivalent to writing "<something> != 0", although less readable. I have 
no idea if compilers actually generate better code for it, or people just do it 
because it's shorter to type.

 

On 16 June 2014 11:09, Ged Murphy <[email protected] 
<mailto:[email protected]> > wrote:

Yes, the double negate is a little trick to give you either a 1 or a 0 instead 
of the value of the operation.



-----Original Message-----
From: Ros-dev [mailto:[email protected] 
<mailto:[email protected]> ] On Behalf Of Pierre Schweitzer
Sent: 16 June 2014 07:31
To: [email protected] <mailto:[email protected]> 
Subject: Re: [ros-dev] [ros-diffs] [hbelusca] 63599: [TASKMGR]: Use the EndTask 
API to kill tasks.

On 15/06/2014 19:47, [email protected] <mailto:[email protected]> 
 wrote:
> +    /* Trick: on Windows, pressing the CTRL key forces the task to be ended 
> */
> +    BOOL ForceEndTask = !!(GetKeyState(VK_CONTROL) & 0x8000);
> +

Was it really meant to be '!!'?

--
Pierre Schweitzer<pierre at reactos.org <http://reactos.org> > System 
Administrator ReactOS Foundation





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