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ZealOS/docs/Demo/MultiCore/Lock.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=cF2>/*lock{} is a compiler statement</span><span class=cF0>
<a name="l2"></a></span><span class=cF2>which places asm LOCK instruction</span><span class=cF0>
<a name="l3"></a></span><span class=cF2>prefixes on code. Only use it on</span><span class=cF0>
<a name="l4"></a></span><span class=cF2>read-modify-write statements.</span><span class=cF0>
<a name="l5"></a></span><span class=cF2>It will generate invalid insts</span><span class=cF0>
<a name="l6"></a></span><span class=cF2>if you misuse it and it will crash.</span><span class=cF4>
<a name="l7"></a></span><a href="https://zeal-operating-system.github.io/ZealOS/Compiler/UAsm.ZC.html#l836"><span class=cF4>U</span></a><span class=cF2>() to see what code was generated.</span><span class=cF0>
<a name="l8"></a></span><span class=cF2>*/</span><span class=cF0>
<a name="l9"></a>
<a name="l10"></a>#</span><span class=cF1>define</span><span class=cF0> COUNT </span><span class=cFE>0x1000000</span><span class=cF0>
<a name="l11"></a>
<a name="l12"></a></span><span class=cF9>I64</span><span class=cF0> global;
<a name="l13"></a>
<a name="l14"></a></span><span class=cF1>U0</span><span class=cF0> MPUnlockedInc(</span><span class=cF9>I64</span><span class=cF0>)
<a name="l15"></a>{
<a name="l16"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l17"></a>
<a name="l18"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; COUNT; i++)
<a name="l19"></a> global++;
<a name="l20"></a>}
<a name="l21"></a>
<a name="l22"></a></span><span class=cF1>U0</span><span class=cF0> UnlockedInc()
<a name="l23"></a>{
<a name="l24"></a> </span><span class=cF9>CJob</span><span class=cF0> *tmpm0, *tmpm1;
<a name="l25"></a>
<a name="l26"></a> global= </span><span class=cFE>0</span><span class=cF0>;
<a name="l27"></a> tmpm0 = </span><span class=cF5>JobQueue</span><span class=cF0>(&amp;MPUnlockedInc, </span><span class=cF3>NULL</span><span class=cF0>, </span><span class=cFE>0</span><span class=cF0>, </span><span class=cFE>0</span><span class=cF0>);
<a name="l28"></a> tmpm1 = </span><span class=cF5>JobQueue</span><span class=cF0>(&amp;MPUnlockedInc, </span><span class=cF3>NULL</span><span class=cF0>, </span><span class=cFE>1</span><span class=cF0>, </span><span class=cFE>0</span><span class=cF0>);
<a name="l29"></a> </span><span class=cF5>JobResGet</span><span class=cF0>(tmpm0);
<a name="l30"></a> </span><span class=cF5>JobResGet</span><span class=cF0>(tmpm1);
<a name="l31"></a> </span><span class=cF6>&quot;Correct Count:%X Actual Count:%X\n&quot;</span><span class=cF0>, COUNT * </span><span class=cFE>2</span><span class=cF0>, global;
<a name="l32"></a>}
<a name="l33"></a>
<a name="l34"></a></span><span class=cF1>U0</span><span class=cF0> MPLockedInc(</span><span class=cF9>I64</span><span class=cF0>)
<a name="l35"></a>{
<a name="l36"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l37"></a>
<a name="l38"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; COUNT; i++)
<a name="l39"></a> </span><span class=cF1>lock</span><span class=cF0> </span><span class=cF2>/*Can be used without {} */</span><span class=cF0> global++;
<a name="l40"></a>}
<a name="l41"></a>
<a name="l42"></a></span><span class=cF1>U0</span><span class=cF0> LockedInc()
<a name="l43"></a>{
<a name="l44"></a> </span><span class=cF9>CJob</span><span class=cF0> *tmpm0, *tmpm1;
<a name="l45"></a>
<a name="l46"></a> global = </span><span class=cFE>0</span><span class=cF0>;
<a name="l47"></a> tmpm0 = </span><span class=cF5>JobQueue</span><span class=cF0>(&amp;MPLockedInc, </span><span class=cF3>NULL</span><span class=cF0>, </span><span class=cFE>0</span><span class=cF0>, </span><span class=cFE>0</span><span class=cF0>);
<a name="l48"></a> tmpm1 = </span><span class=cF5>JobQueue</span><span class=cF0>(&amp;MPLockedInc, </span><span class=cF3>NULL</span><span class=cF0>, </span><span class=cFE>1</span><span class=cF0>, </span><span class=cFE>0</span><span class=cF0>);
<a name="l49"></a> </span><span class=cF5>JobResGet</span><span class=cF0>(tmpm0);
<a name="l50"></a> </span><span class=cF5>JobResGet</span><span class=cF0>(tmpm1);
<a name="l51"></a> </span><span class=cF6>&quot;Correct Count:%X Actual Count:%X\n&quot;</span><span class=cF0>, COUNT * </span><span class=cFE>2</span><span class=cF0>, global;
<a name="l52"></a>}
<a name="l53"></a>
<a name="l54"></a>UnlockedInc;
<a name="l55"></a>LockedInc;
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