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<a name="l1"></a><span class=cF2>/*On each core, tasks are linked in a</span><span class=cF0>
<a name="l2"></a></span><span class=cF2>circular doubly-linked list queue with</span><span class=cF0>
<a name="l3"></a></span><span class=cF2>the Seth task as the head. On Core0,</span><span class=cF0>
<a name="l4"></a></span><span class=cF2>the queue order represents the front-to-back</span><span class=cF0>
<a name="l5"></a></span><span class=cF2>window stack order with the window mgr</span><span class=cF0>
<a name="l6"></a></span><span class=cF2>as the wallpaper.</span><span class=cF0>
<a name="l7"></a>
<a name="l8"></a></span><span class=cF2>The scheduler is round-robin. It checks</span><span class=cF0>
<a name="l9"></a></span><span class=cF2>if a task is ready and runs it or skips it.</span><span class=cF0>
<a name="l10"></a></span><span class=cF2>Swapping tasks just involves storing and</span><span class=cF0>
<a name="l11"></a></span><span class=cF2>restoring regs (no disk I/O for virtual</span><span class=cF0>
<a name="l12"></a></span><span class=cF2>memory and no addr map changes). It is</span><span class=cF0>
<a name="l13"></a></span><span class=cF2>always fully identity-mapped on all cores.</span><span class=cF0>
<a name="l14"></a></span><span class=cF2>Tasks can be switched in half a microsecond.</span><span class=cF0>
<a name="l15"></a>
<a name="l16"></a></span><span class=cF2>The scheduler checks if a task is</span><span class=cF0>
<a name="l17"></a></span><span class=cF2>waiting for a certain time or waiting</span><span class=cF0>
<a name="l18"></a></span><span class=cF2>on a message and skips if not ready.</span><span class=cF0>
<a name="l19"></a></span><span class=cF2>A task runs until it voluntarily yields ctrl</span><span class=cF0>
<a name="l20"></a></span><span class=cF2>with a call to </span><a href="/Wb/Kernel/Sched.HC.HTML#l284"><span class=cF4>Yield</span></a><span class=cF2>(). Tasks waiting on I/O</span><span class=cF0>
<a name="l21"></a></span><span class=cF2>often loop, checking for a status and</span><span class=cF4>
<a name="l22"></a></span><a href="/Wb/Kernel/Sched.HC.HTML#l284"><span class=cF4>Yield</span></a><span class=cF2>ing. This does not really degrade</span><span class=cF0>
<a name="l23"></a></span><span class=cF2>performance, but pegs the CPU Load.</span><span class=cF0>
<a name="l24"></a>
<a name="l25"></a></span><span class=cF2>The scheduler checks for a few keys:</span><span class=cF0>
<a name="l26"></a>
<a name="l27"></a></span><span class=cF2>&lt;CTRL-ALT-x&gt; kill a task.</span><span class=cF0>
<a name="l28"></a></span><span class=cF2>&lt;CTRL-ALT-DEL&gt; reboots.</span><span class=cF0>
<a name="l29"></a></span><span class=cF2>&lt;CTRL-ALT-n&gt; Next task.</span><span class=cF0>
<a name="l30"></a></span><span class=cF2>&lt;CTRL-ALT-c&gt; breaks execution of a program.</span><span class=cF0>
<a name="l31"></a>
<a name="l32"></a></span><span class=cF2>Each core has its own circular task queue.</span><span class=cF0>
<a name="l33"></a></span><span class=cF2>For AP processors, they have a &quot;Seth&quot; task</span><span class=cF0>
<a name="l34"></a></span><span class=cF2>which stays in a loop waiting for jobs or</span><span class=cF0>
<a name="l35"></a></span><span class=cF2>requests to spawn tasks. See </span><a href="/Wb/Kernel/MultiProc.HC.HTML#l194"><span class=cF4>CoreAPSethTask</span></a><span class=cF2>().</span><span class=cF0>
<a name="l36"></a></span><span class=cF2>*/</span><span class=cF0>
<a name="l37"></a>
<a name="l38"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cFD>TaskFocusNext</span><span class=cF0>()
<a name="l39"></a>{
<a name="l40"></a> </span><span class=cF9>CTask</span><span class=cF0> *task,*_task=</span><span class=cFB>sys_focus_task</span><span class=cF0>;
<a name="l41"></a> </span><span class=cFB>sys_focus_task</span><span class=cF0>=</span><span class=cF3>NULL</span><span class=cF0>;
<a name="l42"></a> </span><span class=cF1>if</span><span class=cF0> (!_task) _task=</span><span class=cFB>adam_task</span><span class=cF0>;
<a name="l43"></a> task=_task-&gt;next_task;
<a name="l44"></a> </span><span class=cF1>do</span><span class=cF0> </span><span class=cF7>{</span><span class=cF0>
<a name="l45"></a> </span><span class=cF1>if</span><span class=cF0> (!</span><span class=cF5>Bt</span><span class=cF7>(</span><span class=cF0>&amp;task-&gt;win_inhibit,</span><span class=cF3>WIf_SELF_FOCUS</span><span class=cF7>)</span><span class=cF0>) {
<a name="l46"></a> </span><span class=cFB>sys_focus_task</span><span class=cF0>=task;
<a name="l47"></a> </span><span class=cF5>CallExtNum</span><span class=cF0>(</span><span class=cF3>EXT_WIN_TO_TOP</span><span class=cF0>,task,</span><span class=cF3>TRUE</span><span class=cF0>);
<a name="l48"></a> </span><span class=cF1>return</span><span class=cF0>;
<a name="l49"></a> }
<a name="l50"></a> task=task-&gt;next_task;
<a name="l51"></a> </span><span class=cF7>}</span><span class=cF0> </span><span class=cF1>while</span><span class=cF0> (task!=_task);
<a name="l52"></a>}
<a name="l53"></a>
<a name="l54"></a></span><span class=cF1>asm</span><span class=cF0> {
<a name="l55"></a></span><span class=cFD>TASK_CONTEXT_SAVE</span><span class=cF0>::
<a name="l56"></a></span><span class=cF2>//OUT:</span><span class=cF0> </span><span class=cF2>RSI=FS</span><span class=cF0>
<a name="l57"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>
<a name="l58"></a> </span><span class=cF1>PUSHFD</span><span class=cF0>
<a name="l59"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cFC>RSI</span><span class=cF0>
<a name="l60"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cFC>FS</span><span class=cF0>:</span><span class=cF9>CTask</span><span class=cF0>.addr[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l61"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rflags[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l62"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rsi[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l63"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rax[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cFC>RAX</span><span class=cF0>
<a name="l64"></a>
<a name="l65"></a></span><span class=cF2>/*Divert the stk to the Task memory</span><span class=cF0>
<a name="l66"></a></span><span class=cF2>and push onto it and divert it back.</span><span class=cF0>
<a name="l67"></a></span><span class=cF2>It's a little faster.</span><span class=cF0>
<a name="l68"></a></span><span class=cF2>*/</span><span class=cF0>
<a name="l69"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>RSP</span><span class=cF0>
<a name="l70"></a> </span><span class=cF1>LEA</span><span class=cF0> </span><span class=cFC>RSP</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.r15+8[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l71"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>R15</span><span class=cF0>
<a name="l72"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>R14</span><span class=cF0>
<a name="l73"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>R13</span><span class=cF0>
<a name="l74"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>R12</span><span class=cF0>
<a name="l75"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>R11</span><span class=cF0>
<a name="l76"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>R10</span><span class=cF0>
<a name="l77"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>R9</span><span class=cF0>
<a name="l78"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>R8</span><span class=cF0>
<a name="l79"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RDI</span><span class=cF0>
<a name="l80"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RBP</span><span class=cF0>
<a name="l81"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RBX</span><span class=cF0>
<a name="l82"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RDX</span><span class=cF0>
<a name="l83"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RCX</span><span class=cF0>
<a name="l84"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSP</span><span class=cF0>,</span><span class=cFC>RAX</span><span class=cF0>
<a name="l85"></a>
<a name="l86"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.fpu_mmx[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l87"></a> </span><span class=cF1>FXSAVE</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> [</span><span class=cFC>RAX</span><span class=cF0>]
<a name="l88"></a>
<a name="l89"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RDX</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.bpt_lst[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l90"></a>@@05: </span><span class=cF1>TEST</span><span class=cF0> </span><span class=cFC>RDX</span><span class=cF0>,</span><span class=cFC>RDX</span><span class=cF0>
<a name="l91"></a> </span><span class=cF1>JZ</span><span class=cF0> @@10
<a name="l92"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RDI</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CBpt</span><span class=cF0>.addr[</span><span class=cFC>RDX</span><span class=cF0>]
<a name="l93"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AL</span><span class=cF0>,</span><span class=cF1>U8</span><span class=cF0> </span><span class=cF9>CBpt</span><span class=cF0>.val[</span><span class=cFC>RDX</span><span class=cF0>]
<a name="l94"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF1>U8</span><span class=cF0> [</span><span class=cFC>RDI</span><span class=cF0>],</span><span class=cFC>AL</span><span class=cF0>
<a name="l95"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RDX</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CBpt</span><span class=cF0>.next[</span><span class=cFC>RDX</span><span class=cF0>]
<a name="l96"></a> </span><span class=cF1>JMP</span><span class=cF0> @@05
<a name="l97"></a>@@10: </span><span class=cF1>RET</span><span class=cF0>
<a name="l98"></a></span><span class=cF2>//************************************</span><span class=cF0>
<a name="l99"></a></span><span class=cFD>_TASK_CONTEXT_RESTORE</span><span class=cF0>::
<a name="l100"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>RAX</span><span class=cF0>
<a name="l101"></a> </span><span class=cF1>INC</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cFC>GS</span><span class=cF0>:</span><span class=cF9>CCPU</span><span class=cF0>.swap_cnter[</span><span class=cFC>RAX</span><span class=cF0>]
<a name="l102"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cFC>FS</span><span class=cF0>:</span><span class=cF9>CTask</span><span class=cF0>.addr[</span><span class=cFC>RAX</span><span class=cF0>]
<a name="l103"></a> </span><span class=cF1>BT</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rflags[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cF3>RFLAGf_INT</span><span class=cF0>
<a name="l104"></a> </span><span class=cF1>JNC</span><span class=cF0> @@05
<a name="l105"></a> </span><span class=cF1>BTS</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> </span><span class=cFC>GS</span><span class=cF0>:</span><span class=cF9>CCPU</span><span class=cF0>.cpu_flags[</span><span class=cFC>RAX</span><span class=cF0>],</span><span class=cF3>CPUf_RAN_A_TASK</span><span class=cF0>
<a name="l106"></a>@@05: </span><span class=cF1>BT</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.task_flags[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cF3>TASKf_DISABLE_BPTS</span><span class=cF0>
<a name="l107"></a> </span><span class=cF1>JC</span><span class=cF0> @@15
<a name="l108"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RDX</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.bpt_lst[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l109"></a>@@10: </span><span class=cF1>TEST</span><span class=cF0> </span><span class=cFC>RDX</span><span class=cF0>,</span><span class=cFC>RDX</span><span class=cF0>
<a name="l110"></a> </span><span class=cF1>JZ</span><span class=cF0> @@15
<a name="l111"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RDI</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CBpt</span><span class=cF0>.addr[</span><span class=cFC>RDX</span><span class=cF0>]
<a name="l112"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF1>U8</span><span class=cF0> [</span><span class=cFC>RDI</span><span class=cF0>],</span><span class=cF3>OC_BPT</span><span class=cF0>
<a name="l113"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RDX</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CBpt</span><span class=cF0>.next[</span><span class=cFC>RDX</span><span class=cF0>]
<a name="l114"></a> </span><span class=cF1>JMP</span><span class=cF0> @@10
<a name="l115"></a>
<a name="l116"></a>@@15: </span><span class=cF1>INC</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.swap_cnter[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l117"></a>
<a name="l118"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.fpu_mmx[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l119"></a> </span><span class=cF1>FXRSTOR</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> [</span><span class=cFC>RAX</span><span class=cF0>]
<a name="l120"></a>
<a name="l121"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>RSP</span><span class=cF0>
<a name="l122"></a> </span><span class=cF1>LEA</span><span class=cF0> </span><span class=cFC>RSP</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rcx[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l123"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>RCX</span><span class=cF0>
<a name="l124"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>RDX</span><span class=cF0>
<a name="l125"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>RBX</span><span class=cF0>
<a name="l126"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>RBP</span><span class=cF0>
<a name="l127"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>RDI</span><span class=cF0>
<a name="l128"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>R8</span><span class=cF0>
<a name="l129"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>R9</span><span class=cF0>
<a name="l130"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>R10</span><span class=cF0>
<a name="l131"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>R11</span><span class=cF0>
<a name="l132"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>R12</span><span class=cF0>
<a name="l133"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>R13</span><span class=cF0>
<a name="l134"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>R14</span><span class=cF0>
<a name="l135"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>R15</span><span class=cF0>
<a name="l136"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSP</span><span class=cF0>,</span><span class=cFC>RAX</span><span class=cF0>
<a name="l137"></a>
<a name="l138"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rax[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l139"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cF9>CGDT</span><span class=cF0>.ds
<a name="l140"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rsp[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l141"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rflags[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l142"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cF9>CGDT</span><span class=cF0>.cs64
<a name="l143"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rip[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l144"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rsi[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l145"></a> </span><span class=cF1>IRET</span><span class=cF0>
<a name="l146"></a></span><span class=cF2>//************************************</span><span class=cF0>
<a name="l147"></a>END_RSI_TASK:
<a name="l148"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>RSI</span><span class=cF0>
<a name="l149"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>SET_FS_BASE</span><span class=cF0>
<a name="l150"></a></span><span class=cFD>_TASK_END_NOW</span><span class=cF0>::
<a name="l151"></a> </span><span class=cF1>CALL</span><span class=cF0> &amp;</span><span class=cFD>TaskEnd</span><span class=cF0>
<a name="l152"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cFC>RAX</span><span class=cF0>
<a name="l153"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>SET_FS_BASE</span><span class=cF0>
<a name="l154"></a> </span><span class=cF1>JMP</span><span class=cF0> </span><span class=cF1>I8</span><span class=cF0> RESTORE_RSI_TASK
<a name="l155"></a>
<a name="l156"></a></span><span class=cFD>_YIELD</span><span class=cF0>::
<a name="l157"></a> </span><span class=cF1>PUSHFD</span><span class=cF0>
<a name="l158"></a> </span><span class=cF1>TEST</span><span class=cF0> </span><span class=cF1>U8</span><span class=cF0> [</span><span class=cFD>SYS_SEMAS</span><span class=cF0>+</span><span class=cF3>SEMA_SINGLE_USER</span><span class=cF0>*</span><span class=cF3>DFT_CACHE_LINE_WIDTH</span><span class=cF0>],1
<a name="l159"></a> </span><span class=cF1>JZ</span><span class=cF0> @@05
<a name="l160"></a> </span><span class=cF1>POPFD</span><span class=cF0> </span><span class=cF2>//If single user, don't change task.</span><span class=cF0>
<a name="l161"></a> </span><span class=cF1>RET</span><span class=cF0>
<a name="l162"></a>
<a name="l163"></a>@@05: </span><span class=cF1>CLI</span><span class=cF0>
<a name="l164"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>TASK_CONTEXT_SAVE</span><span class=cF0>
<a name="l165"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>EBX</span><span class=cF0>,</span><span class=cF9>U32</span><span class=cF0> </span><span class=cFD>_RET</span><span class=cF0>
<a name="l166"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rip[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cFC>RBX</span><span class=cF0>
<a name="l167"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rflags[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l168"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rsp[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cFC>RSP</span><span class=cF0>
<a name="l169"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.next_task[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l170"></a>
<a name="l171"></a>RESTORE_RSI_TASK:
<a name="l172"></a> </span><span class=cF1>TEST</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> [</span><span class=cFD>SYS_CTRL_ALT_FLAGS</span><span class=cF0>],1&lt;&lt;</span><span class=cF3>CTRL_ALT_DEL</span><span class=cF0>|
<a name="l173"></a>1&lt;&lt;</span><span class=cF3>CTRL_ALT_TAB</span><span class=cF0>|1&lt;&lt;</span><span class=cF3>CTRL_ALT_X</span><span class=cF0>|1&lt;&lt;</span><span class=cF3>CTRL_ALT_C</span><span class=cF0>
<a name="l174"></a> </span><span class=cF1>JNZ</span><span class=cF0> HANDLE_SYSF_KEY_EVENT
<a name="l175"></a>
<a name="l176"></a>RESTORE_RSI_TASK2:
<a name="l177"></a>@@20: </span><span class=cF1>BT</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.task_flags[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cF3>TASKf_KILL_TASK</span><span class=cF0>
<a name="l178"></a> </span><span class=cF1>JC</span><span class=cF0> END_RSI_TASK
<a name="l179"></a> </span><span class=cF1>TEST</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.task_flags[</span><span class=cFC>RSI</span><span class=cF0>],
<a name="l180"></a> 1&lt;&lt;</span><span class=cF3>TASKf_AWAITING_MSG</span><span class=cF0>|1&lt;&lt;</span><span class=cF3>TASKf_SUSPENDED</span><span class=cF0>
<a name="l181"></a> </span><span class=cF1>JNZ</span><span class=cF0> @@25
<a name="l182"></a>
<a name="l183"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> [&amp;</span><span class=cFB>cnts</span><span class=cF0>.jiffies]
<a name="l184"></a> </span><span class=cF1>CMP</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.wake_jiffy[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cFC>RAX</span><span class=cF0>
<a name="l185"></a> </span><span class=cF1>JG</span><span class=cF0> @@25 </span><span class=cF2>//Jmp if not ready, yet.</span><span class=cF0>
<a name="l186"></a>
<a name="l187"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>RSI</span><span class=cF0>
<a name="l188"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>SET_FS_BASE</span><span class=cF0>
<a name="l189"></a> </span><span class=cF1>JMP</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> </span><span class=cFD>_TASK_CONTEXT_RESTORE</span><span class=cF0>
<a name="l190"></a>
<a name="l191"></a>@@25: </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.next_task[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l192"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>RAX</span><span class=cF0>
<a name="l193"></a> </span><span class=cF1>CMP</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cFC>GS</span><span class=cF0>:</span><span class=cF9>CCPU</span><span class=cF0>.seth_task[</span><span class=cFC>RAX</span><span class=cF0>],</span><span class=cFC>RSI</span><span class=cF0>
<a name="l194"></a> </span><span class=cF1>JNE</span><span class=cF0> @@20 </span><span class=cF2>//Jmp if not Seth</span><span class=cF0>
<a name="l195"></a> </span><span class=cF1>BTR</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> </span><span class=cFC>GS</span><span class=cF0>:</span><span class=cF9>CCPU</span><span class=cF0>.cpu_flags[</span><span class=cFC>RAX</span><span class=cF0>],</span><span class=cF3>CPUf_RAN_A_TASK</span><span class=cF0>
<a name="l196"></a> </span><span class=cF1>JC</span><span class=cF0> @@20 </span><span class=cF2>//Jmp if had chance for IRQ already</span><span class=cF0>
<a name="l197"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cFC>GS</span><span class=cF0>:</span><span class=cF9>CCPU</span><span class=cF0>.idle_task[</span><span class=cFC>RAX</span><span class=cF0>]
<a name="l198"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSP</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.stk[</span><span class=cFC>RAX</span><span class=cF0>]
<a name="l199"></a> </span><span class=cF1>ADD</span><span class=cF0> </span><span class=cFC>RSP</span><span class=cF0>,</span><span class=cF3>MEM_DFT_STK</span><span class=cF0>+</span><span class=cF9>CTaskStk</span><span class=cF0>.stk_base </span><span class=cF2>//Rst to top</span><span class=cF0>
<a name="l200"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>SET_FS_BASE</span><span class=cF0>
<a name="l201"></a> </span><span class=cF1>STI</span><span class=cF0> </span><span class=cF2>//Restore idle task so we can unmask IRQs.</span><span class=cF0>
<a name="l202"></a> </span><span class=cF1>HLT</span><span class=cF0>
<a name="l203"></a></span><span class=cFD>SYS_IDLE_PT</span><span class=cF0>::
<a name="l204"></a> </span><span class=cF1>CLI</span><span class=cF0>
<a name="l205"></a>
<a name="l206"></a>RESTORE_SETH_TASK_IF_READY:
<a name="l207"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>RAX</span><span class=cF0>
<a name="l208"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cFC>GS</span><span class=cF0>:</span><span class=cF9>CCPU</span><span class=cF0>.seth_task[</span><span class=cFC>RAX</span><span class=cF0>]
<a name="l209"></a> </span><span class=cF1>JMP</span><span class=cF0> RESTORE_RSI_TASK
<a name="l210"></a>
<a name="l211"></a>HANDLE_SYSF_KEY_EVENT:
<a name="l212"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>RSI</span><span class=cF0>
<a name="l213"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>SET_FS_BASE</span><span class=cF0>
<a name="l214"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>RBX</span><span class=cF0>,</span><span class=cFC>RBX</span><span class=cF0>
<a name="l215"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>GS</span><span class=cF0>:</span><span class=cF9>CCPU</span><span class=cF0>.num[</span><span class=cFC>RBX</span><span class=cF0>]
<a name="l216"></a> </span><span class=cF1>TEST</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>RAX</span><span class=cF0>
<a name="l217"></a> </span><span class=cF1>JNZ</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> RESTORE_RSI_TASK2
<a name="l218"></a>
<a name="l219"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>,</span><span class=cF9>U32</span><span class=cF0> </span><span class=cFD>SYS_CTRL_ALT_FLAGS</span><span class=cF0>
<a name="l220"></a> </span><span class=cF1>LOCK</span><span class=cF0>
<a name="l221"></a> </span><span class=cF1>BTR</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [</span><span class=cFC>RAX</span><span class=cF0>],</span><span class=cF3>CTRL_ALT_DEL</span><span class=cF0>
<a name="l222"></a> </span><span class=cF1>JC</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> &amp;</span><span class=cF5>Reboot</span><span class=cF0>
<a name="l223"></a>
<a name="l224"></a> </span><span class=cF1>CMP</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cFC>GS</span><span class=cF0>:</span><span class=cF9>CCPU</span><span class=cF0>.idle_task[</span><span class=cFC>RBX</span><span class=cF0>],</span><span class=cFC>RSI</span><span class=cF0>
<a name="l225"></a> </span><span class=cF1>JE</span><span class=cF0> RESTORE_SETH_TASK_IF_READY
<a name="l226"></a>
<a name="l227"></a> </span><span class=cF1>LOCK</span><span class=cF0>
<a name="l228"></a> </span><span class=cF1>BTR</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [</span><span class=cFC>RAX</span><span class=cF0>],</span><span class=cF3>CTRL_ALT_TAB</span><span class=cF0>
<a name="l229"></a> </span><span class=cF1>JNC</span><span class=cF0> @@05
<a name="l230"></a> </span><span class=cF1>CALL</span><span class=cF0> &amp;</span><span class=cFD>TaskFocusNext</span><span class=cF0>
<a name="l231"></a> </span><span class=cF1>JMP</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> RESTORE_FS_TASK
<a name="l232"></a>
<a name="l233"></a>@@05: </span><span class=cF1>LOCK</span><span class=cF0>
<a name="l234"></a> </span><span class=cF1>BTR</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [</span><span class=cFC>RAX</span><span class=cF0>],</span><span class=cF3>CTRL_ALT_X</span><span class=cF0>
<a name="l235"></a> </span><span class=cF1>JC</span><span class=cF0> END_FOCUS_USER
<a name="l236"></a> </span><span class=cF1>LOCK</span><span class=cF0>
<a name="l237"></a> </span><span class=cF1>BTR</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [</span><span class=cFC>RAX</span><span class=cF0>],</span><span class=cF3>CTRL_ALT_C</span><span class=cF0>
<a name="l238"></a> </span><span class=cF1>JNC</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> RESTORE_RSI_TASK
<a name="l239"></a>
<a name="l240"></a>BREAK_FOCUS_USER:
<a name="l241"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> [</span><span class=cFD>SYS_FOCUS_TASK</span><span class=cF0>]
<a name="l242"></a> </span><span class=cF1>TEST</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cFC>RSI</span><span class=cF0>
<a name="l243"></a> </span><span class=cF1>JZ</span><span class=cF0> RESTORE_SETH_TASK_IF_READY
<a name="l244"></a> </span><span class=cF1>BT</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.win_inhibit[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cF3>WIf_SELF_FOCUS</span><span class=cF0>
<a name="l245"></a> </span><span class=cF1>JC</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> RESTORE_RSI_TASK
<a name="l246"></a> </span><span class=cF1>LOCK</span><span class=cF0>
<a name="l247"></a> </span><span class=cF1>BTR</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.task_flags[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cF3>TASKf_BREAK_LOCKED</span><span class=cF0>
<a name="l248"></a> </span><span class=cF1>JNC</span><span class=cF0> @@10
<a name="l249"></a> </span><span class=cF1>LOCK</span><span class=cF0>
<a name="l250"></a> </span><span class=cF1>BTS</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.task_flags[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cF3>TASKf_PENDING_BREAK</span><span class=cF0>
<a name="l251"></a> </span><span class=cF1>JMP</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> RESTORE_RSI_TASK
<a name="l252"></a>
<a name="l253"></a>@@10: </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,&amp;</span><span class=cF5>Break</span><span class=cF0>
<a name="l254"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.rip[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cFC>RAX</span><span class=cF0>
<a name="l255"></a> </span><span class=cF1>BT</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.task_flags[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cF3>TASKf_BREAK_TO_SHIFT_ESC</span><span class=cF0>
<a name="l256"></a> </span><span class=cF1>JC</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> RESTORE_RSI_TASK
<a name="l257"></a>
<a name="l258"></a></span><span class=cF2>//Do these now, in case interrupt happens.</span><span class=cF0>
<a name="l259"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.wake_jiffy[</span><span class=cFC>RSI</span><span class=cF0>],0
<a name="l260"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>
<a name="l261"></a> </span><span class=cF1>CALL</span><span class=cF0> &amp;</span><span class=cF5>TaskRstAwaitingMsg</span><span class=cF0>
<a name="l262"></a> </span><span class=cF1>JMP</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> RESTORE_RSI_TASK
<a name="l263"></a>
<a name="l264"></a>END_FOCUS_USER:
<a name="l265"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cF9>U64</span><span class=cF0> [</span><span class=cFD>SYS_FOCUS_TASK</span><span class=cF0>]
<a name="l266"></a> </span><span class=cF1>CALL</span><span class=cF0> &amp;</span><span class=cFD>TaskFocusNext</span><span class=cF0>
<a name="l267"></a> </span><span class=cF1>TEST</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cFC>RSI</span><span class=cF0>
<a name="l268"></a> </span><span class=cF1>JZ</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> RESTORE_SETH_TASK_IF_READY
<a name="l269"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RAX</span><span class=cF0>,</span><span class=cFC>RSI</span><span class=cF0>
<a name="l270"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>SET_FS_BASE</span><span class=cF0>
<a name="l271"></a> </span><span class=cF1>BT</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.win_inhibit[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cF3>WIf_SELF_FOCUS</span><span class=cF0>
<a name="l272"></a> </span><span class=cF1>JC</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> RESTORE_RSI_TASK
<a name="l273"></a> </span><span class=cF1>LOCK</span><span class=cF0>
<a name="l274"></a> </span><span class=cF1>BTS</span><span class=cF0> </span><span class=cF9>U64</span><span class=cF0> </span><span class=cF9>CTask</span><span class=cF0>.task_flags[</span><span class=cFC>RSI</span><span class=cF0>],</span><span class=cF3>TASKf_KILL_TASK</span><span class=cF0>
<a name="l275"></a> </span><span class=cF1>JMP</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> END_RSI_TASK
<a name="l276"></a>
<a name="l277"></a>RESTORE_FS_TASK:
<a name="l278"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cFC>RSI</span><span class=cF0>
<a name="l279"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>RSI</span><span class=cF0>,</span><span class=cFC>FS</span><span class=cF0>:</span><span class=cF9>CTask</span><span class=cF0>.addr[</span><span class=cFC>RSI</span><span class=cF0>]
<a name="l280"></a> </span><span class=cF1>JMP</span><span class=cF0> </span><span class=cF9>I32</span><span class=cF0> RESTORE_RSI_TASK
<a name="l281"></a>}
<a name="l282"></a>
<a name="l283"></a></span><span class=cF1>_extern</span><span class=cF0> </span><span class=cFD>_TASK_CONTEXT_RESTORE</span><span class=cF0> </span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>TaskContextRestore</span><span class=cF0>(); </span><span class=cF2>//Restore a task context.</span><span class=cF0>
<a name="l284"></a></span><span class=cF1>_extern</span><span class=cF0> </span><span class=cFD>_YIELD</span><span class=cF0> </span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>Yield</span><span class=cF0>(); </span><span class=cF2>//Yield cpu to next task.</span><span class=cF0>
<a name="l285"></a></span><span class=cF1>_extern</span><span class=cF0> </span><span class=cFD>_TASK_END_NOW</span><span class=cF0> </span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>TaskEndNow</span><span class=cF0>(); </span><span class=cF2>//Terminate current task.</span><span class=cF0>
<a name="l286"></a>
<a name="l287"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>TaskQueIns</span><span class=cF0>(</span><span class=cF9>CTask</span><span class=cF0> *task,</span><span class=cF9>CTask</span><span class=cF0> *pred=</span><span class=cF3>NULL</span><span class=cF0>)
<a name="l288"></a>{</span><span class=cF2>//Insert a task in the scheduler running task queue.</span><span class=cF0>
<a name="l289"></a></span><span class=cF2>//You have no business with this, probably.</span><span class=cF0>
<a name="l290"></a> </span><span class=cF9>CTask</span><span class=cF0> *last;
<a name="l291"></a> </span><span class=cF1>PUSHFD</span><span class=cF0>
<a name="l292"></a> </span><span class=cF1>CLI</span><span class=cF0>
<a name="l293"></a> </span><span class=cF1>if</span><span class=cF0> (!pred) pred=</span><span class=cF5>Fs</span><span class=cF0>;
<a name="l294"></a> last=pred-&gt;last_task;
<a name="l295"></a> last-&gt;next_task=pred-&gt;last_task=task;
<a name="l296"></a> task-&gt;last_task=last;
<a name="l297"></a> task-&gt;next_task=pred;
<a name="l298"></a> </span><span class=cF1>POPFD</span><span class=cF0>
<a name="l299"></a>}
<a name="l300"></a>
<a name="l301"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>TaskQueRem</span><span class=cF0>(</span><span class=cF9>CTask</span><span class=cF0> *task)
<a name="l302"></a>{</span><span class=cF2>//Remove a task from the scheduler running task queue.</span><span class=cF0>
<a name="l303"></a></span><span class=cF2>//Use </span><a href="/Wb/Kernel/KTask.HC.HTML#l77"><span class=cF4>Suspend</span></a><span class=cF2>().</span><span class=cF0>
<a name="l304"></a> </span><span class=cF9>CTask</span><span class=cF0> *next,*last;
<a name="l305"></a> </span><span class=cF1>PUSHFD</span><span class=cF0>
<a name="l306"></a> </span><span class=cF1>CLI</span><span class=cF0>
<a name="l307"></a> next=task-&gt;next_task;
<a name="l308"></a> last=task-&gt;last_task;
<a name="l309"></a> last-&gt;next_task=next;
<a name="l310"></a> next-&gt;last_task=last;
<a name="l311"></a> </span><span class=cF1>POPFD</span><span class=cF0>
<a name="l312"></a>}
<a name="l313"></a>
<a name="l314"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cFD>TaskQueInsChild</span><span class=cF0>(</span><span class=cF9>CTask</span><span class=cF0> *task)
<a name="l315"></a>{
<a name="l316"></a> </span><span class=cF9>CTask</span><span class=cF0> *last,*pred;
<a name="l317"></a> </span><span class=cF1>PUSHFD</span><span class=cF0>
<a name="l318"></a> </span><span class=cF1>CLI</span><span class=cF0>
<a name="l319"></a> pred=task-&gt;parent_task-&gt;last_child_task;
<a name="l320"></a> last=pred-&gt;last_sibling_task;
<a name="l321"></a> last-&gt;next_sibling_task=pred-&gt;last_sibling_task=task;
<a name="l322"></a> task-&gt;last_sibling_task=last;
<a name="l323"></a> task-&gt;next_sibling_task=pred;
<a name="l324"></a> </span><span class=cF1>POPFD</span><span class=cF0>
<a name="l325"></a>}
</span></pre></body>
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