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61 lines
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HTML
61 lines
2.0 KiB
HTML
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<TITLE>cc65 function reference: Alphabetical function reference: free</TITLE>
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<H2><A NAME="free"></A> 3.62 <A HREF="funcref.html#toc3.62">free</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>Free a block of dynamic memory.</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>void __fastcall__ free (void* block);</CODE></P>
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<DT><B>Description</B><DD><P>Free a block of dynamic memory previously allocated with
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<CODE>
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<A HREF="funcref-139.html#malloc">malloc</A></CODE>, <CODE>
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<A HREF="funcref-73.html#calloc">calloc</A></CODE>
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or <CODE>
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<A HREF="funcref-169.html#realloc">realloc</A></CODE>. As an exception, if the passed
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pointer is <CODE>NULL</CODE>, no action is performed.</P>
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<DT><B>Limits</B><DD><P>
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<UL>
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<LI>Passing an already free'd block to <CODE>free</CODE> again will cause undefined
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behaviour and may crash your program.</LI>
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<LI>The function is only available as fastcall function, so it may only
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be 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-46.html#_heapadd">_heapadd</A>,
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<A HREF="funcref-47.html#_heapblocksize">_heapblocksize</A>,
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<A HREF="funcref-48.html#_heapmaxavail">_heapmaxavail</A>,
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<A HREF="funcref-49.html#_heapmemavail">_heapmemavail</A>,
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<A HREF="funcref-73.html#calloc">calloc</A>,
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<A HREF="funcref-139.html#malloc">malloc</A>,
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<A HREF="funcref-169.html#realloc">realloc</A></P>
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<DT><B>Example</B><DD><P>None.</P>
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