<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Jul 24, 2013, at 08:11 , Vipul Nayyar <<a href="mailto:nayyar_vipul@yahoo.com">nayyar_vipul@yahoo.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="font-family: arial, helvetica, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span>Hello Peter,</span></div><div style="font-family: arial, helvetica, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: transparent; "><span><br></span></div><div style="font-family: arial, helvetica, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: transparent; "><span>Thanks for the heads up. I put the cast their initially because the compiler gave me a warning that interrupt handler install function argument 4 requires a rtems_interrupt_handler type. </span></div><div style="font-family: arial, helvetica, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: transparent; "><span><br></span></div><div style="font-family: arial, helvetica, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: transparent; "><span>So can you tell me, what is the right way to go about this ? What kind of problems can be caused ? How do I make sure that I'm actually fixing that part of code ?</span></div><br class="Apple-interchange-newline"></blockquote></div><div><br></div>It varies from case to case. For warnings about a function mismatch I usually introduce a "shim" function in preference to casting, for example, the prototype for a pthread function is<div>"void *handler(void *);" so to call "void fred(void)" I might add a call_fred() shim:</div><div><br></div><div>static void *call_fred(void *unused) {</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>fred();</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>return (void *)0;</div><div>}</div><div><br></div><div>I try to only pass opaque type pointers via a void * and not some other unknown type.</div><div><br></div><div>For variables I'll introduce a temporary. Obviously you never want to cast a pointer to an integer to be a pointer to a double to silence a cast.</div><div><br></div><div>etc.</div><div><br><div>
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px; ">Peter<br>-----------------<br>Peter Dufault<br>HD Associates, Inc. Software and System Engineering</span></font></div></span></span>
</div>
<br></div></body></html>