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54 lines
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54 lines
1.7 KiB
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<TITLE>cc65 function reference: Alphabetical function reference: atexit</TITLE>
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<H2><A NAME="atexit"></A> 3.20 <A HREF="funcref.html#toc3.20">atexit</A></H2>
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<P>
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<BLOCKQUOTE>
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<DL>
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<DT><B>Function</B><DD><P>Register an exit function.</P>
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<DT><B>Header</B><DD><P><CODE>
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<A HREF="funcref-38.html#stdlib.h">stdlib.h</A></CODE></P>
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<DT><B>Declaration</B><DD><P><CODE>int __fastcall__ atexit (void (*exitfunc) (void));</CODE></P>
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<DT><B>Description</B><DD><P><CODE>atexit</CODE> registers the function pointed to by
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<CODE>exitfunc</CODE> as an exit function. Exit functions are called when the program
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terminates, they are called in LIFO order (the last function registered is
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called first). <CODE>atexit</CODE> returns zero on success and a nonzero value on
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failure.</P>
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<DT><B>Limits</B><DD><P>
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<UL>
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<LI>A maximum of 5 exit functions can be registered.</LI>
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<LI>There is no way to unregister an exit function.</LI>
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<LI>The function is only available as fastcall function, so it may only be
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used in presence of a prototype.</LI>
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</UL>
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</P>
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<DT><B>Availability</B><DD><P>ISO 9899</P>
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<DT><B>See also</B><DD><P>
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<A HREF="funcref-62.html#abort">abort</A>,
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<A HREF="funcref-102.html#exit">exit</A></P>
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<DT><B>Example</B><DD><P>None.</P>
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</DL>
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</BLOCKQUOTE>
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</P>
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