cial">)</span><span class="special">;</span></pre>
<p>Same as malloc, only merges the free lists, to preserve order. Amortized O(1). 
</p>
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<td><p><span class="term">Returns:</span></p></td>
<td><p>a free chunk from that block. If a new memory block cannot be allocated, returns 0. Amortized O(1). </p></td>
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<