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57 lines
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<TITLE>cc65 function reference: Alphabetical function reference: _heapblocksize</TITLE>
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<H2><A NAME="_heapblocksize"></A> 3.2 <A HREF="funcref.html#toc3.2">_heapblocksize</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>Return the size of an allocated block.</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>size_t __fastcall__ _heapblocksize (const void* block);</CODE></P>
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<DT><B>Description</B><DD><P>The function returns the size of a block that must have
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previously been allocated by <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> or <CODE>
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<A HREF="funcref-169.html#realloc">realloc</A></CODE>.</P>
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<DT><B>Limits</B><DD><P>
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<UL>
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<LI>Passing a pointer to a block that was is not the result of one of the
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allocation functions, or that has been free'd will give unpredicable results.</LI>
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</UL>
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</P>
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<DT><B>Availability</B><DD><P>cc65</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-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-107.html#free">free</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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