Re: Help to remove reinterpret_cast from c++ code

From:
red floyd <no.spam.here@its.invalid>
Newsgroups:
comp.lang.c++.moderated
Date:
Wed, 24 Apr 2013 06:48:23 CST
Message-ID:
<kl7sep$hrh$1@dont-email.me>
On 4/23/2013 5:15 PM, nvangogh wrote:

Hi, I have been reading a class that I found online that creates an
object to represent a joystick. Now i recall reading that any use of
'reinterpret cast' is dangerous as it is highly machine
dependent. The code I found unfortunately uses this and i was hoping
to improve it, before attempting to use the class in my
program. Note, I have not tested the class as yet - even on the
assumption it works on my machine, i need it to be as general as
possible as my program will run on other machines as well.

This is the offending member function definition:

//loop function attempts to read an event from the device, and, if
//an event is waiting to be processed,
//updates the state structure based on the event type.

void* cJoystick::loop(void *obj)
{
    while (reinterpret_cast<cJoystick *>(obj)->active)
reinterpret_cast<cJoystick *>(obj)->readEv();
}


Use static_cast<>

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