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ZealOS/docs/Demo/StackGrow.ZC.html
TomAwezome 48d4f999cb Update documentation.
2021-12-11 06:10:58 -05:00

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<pre style="font-family:monospace;font-size:12pt">
<a name="l1"></a><span class=cF9>I64</span><span class=cF0> Recurse(</span><span class=cF9>I64</span><span class=cF0> n)
<a name="l2"></a>{
<a name="l3"></a> </span><span class=cF1>if</span><span class=cF0> (n)
<a name="l4"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>1</span><span class=cF0> + </span><span class=cF5>CallStackGrow</span><span class=cF0>(</span><span class=cFE>0x800</span><span class=cF0>, </span><span class=cFE>0x1000000</span><span class=cF0>, &amp;Recurse, n - </span><span class=cFE>1</span><span class=cF0>);
<a name="l5"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l6"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l7"></a>}
<a name="l8"></a>
<a name="l9"></a></span><span class=cF9>I64</span><span class=cF0> Recurse2(</span><span class=cF9>I64</span><span class=cF0> n)
<a name="l10"></a>{
<a name="l11"></a> </span><span class=cF1>if</span><span class=cF0> (n)
<a name="l12"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>1</span><span class=cF0> + Recurse2(n - </span><span class=cFE>1</span><span class=cF0>);
<a name="l13"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l14"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l15"></a>}
<a name="l16"></a>
<a name="l17"></a></span><span class=cF9>I64</span><span class=cF0> Recurse3(</span><span class=cF9>I64</span><span class=cF0> n, </span><span class=cF9>I64</span><span class=cF0> lo, </span><span class=cF9>I64</span><span class=cF0> hi)
<a name="l18"></a>{
<a name="l19"></a> </span><span class=cF1>if</span><span class=cF0> (lo &lt;= n &lt; hi)
<a name="l20"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>1</span><span class=cF0> + Recurse3(n - </span><span class=cFE>1</span><span class=cF0>, lo, hi);
<a name="l21"></a> </span><span class=cF1>else</span><span class=cF0> </span><span class=cF1>if</span><span class=cF0> (n)
<a name="l22"></a> </span><span class=cF1>return</span><span class=cF0> Recurse3(n - </span><span class=cFE>1</span><span class=cF0>, lo, hi);
<a name="l23"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l24"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l25"></a>}
<a name="l26"></a>
<a name="l27"></a>#</span><span class=cF1>define</span><span class=cF0> DEPTH (</span><span class=cFE>2</span><span class=cF0> * </span><span class=cFE>1024</span><span class=cF0> * </span><span class=cFE>1024</span><span class=cF0>)
<a name="l28"></a>
<a name="l29"></a></span><span class=cF1>U0</span><span class=cF0> StackGrowDemo()
<a name="l30"></a>{
<a name="l31"></a> </span><span class=cF1>F64</span><span class=cF0> t0;
<a name="l32"></a>
<a name="l33"></a> t0 = </span><span class=cF5>tS</span><span class=cF0>;
<a name="l34"></a> </span><span class=cF6>&quot;%X:%X\n&quot;</span><span class=cF0>, DEPTH, Recurse(DEPTH);
<a name="l35"></a> </span><span class=cF6>&quot;Time:%7.5fs\n&quot;</span><span class=cF0>, </span><span class=cF5>tS</span><span class=cF0> - t0;
<a name="l36"></a>
<a name="l37"></a> </span><span class=cF2>//If you know the max stack ahead of time...</span><span class=cF0>
<a name="l38"></a> </span><span class=cF2>//Recurse2's stack is 16 because you have 1 arg,</span><span class=cF0>
<a name="l39"></a> </span><span class=cF2>//a return address and no local variables.</span><span class=cF0>
<a name="l40"></a> t0 = </span><span class=cF5>tS</span><span class=cF0>;
<a name="l41"></a> </span><span class=cF6>&quot;%X:%X\n&quot;</span><span class=cF0>, DEPTH, </span><span class=cF5>CallStackGrow</span><span class=cF0>(DEPTH * </span><span class=cFE>16</span><span class=cF0> + </span><span class=cFE>0x800</span><span class=cF0>, DEPTH * </span><span class=cFE>16</span><span class=cF0> + </span><span class=cFE>0x800</span><span class=cF0>, &amp;Recurse2, DEPTH);
<a name="l42"></a> </span><span class=cF6>&quot;Time:%7.5fs\n&quot;</span><span class=cF0>, </span><span class=cF5>tS</span><span class=cF0> - t0;
<a name="l43"></a>
<a name="l44"></a> </span><span class=cF2>//</span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KTask.ZC.html#l129"><span class=cF4>CallStackGrow</span></a><span class=cF2>() works with multiple args.</span><span class=cF0>
<a name="l45"></a> t0 = </span><span class=cF5>tS</span><span class=cF0>;
<a name="l46"></a> </span><span class=cF6>&quot;%X:%X\n&quot;</span><span class=cF0>, DEPTH, </span><span class=cF5>CallStackGrow</span><span class=cF0>(DEPTH * </span><span class=cFE>32</span><span class=cF0> + </span><span class=cFE>0x800</span><span class=cF0>, DEPTH * </span><span class=cFE>32</span><span class=cF0> + </span><span class=cFE>0x800</span><span class=cF0>, &amp;Recurse3, DEPTH, </span><span class=cFE>1000</span><span class=cF0>, </span><span class=cFE>2000</span><span class=cF0>);
<a name="l47"></a> </span><span class=cF6>&quot;Time:%7.5fs\n&quot;</span><span class=cF0>, </span><span class=cF5>tS</span><span class=cF0> - t0;
<a name="l48"></a>}
<a name="l49"></a>
<a name="l50"></a>StackGrowDemo;
<a name="l51"></a>
<a name="l52"></a></span><span class=cF2>//Be careful because you can fragment memory.</span><span class=cF0>
</span></pre></body>
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