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56 lines
1.9 KiB
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56 lines
1.9 KiB
HTML
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<TITLE>cc65 function reference: Alphabetical function reference: _heapmemavail</TITLE>
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<H2><A NAME="_heapmemavail"></A> 3.4 <A HREF="funcref.html#toc3.4">_heapmemavail</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 total available space on the heap.</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__ _heapmemavail (void);</CODE></P>
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<DT><B>Description</B><DD><P>The function returns the total number of bytes available on
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the heap.</P>
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<DT><B>Limits</B><DD><P>
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<UL>
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<LI>This function is of less use than usually assumed, since the returned
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heap space may be available but not in one block. So even if this function
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says that several times more heap space is available than needed,
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<A HREF="funcref-139.html#malloc">malloc</A> may still return <CODE>NULL</CODE>.</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-47.html#_heapblocksize">_heapblocksize</A>,
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<A HREF="funcref-48.html#_heapmaxavail">_heapmaxavail</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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</DL>
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