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* 6631Kartik Agaram2020-07-101-0/+152
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<a href='https://github.com/akkartik/mu/blob/master/402time.mu'>https://github.com/akkartik/mu/blob/master/402time.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="PreProc">type</span> <a href='402time.mu.html#L1'>timespec</a> <span class="Delimiter">{</span>
<span id="L2" class="LineNr"> 2 </span>  tv_sec: int
<span id="L3" class="LineNr"> 3 </span>  tv_nsec: int
<span id="L4" class="LineNr"> 4 </span><span class="Delimiter">}</span>
<span id="L5" class="LineNr"> 5 </span>
<span id="L6" class="LineNr"> 6 </span><span class="muComment"># return time in seconds since epoch</span>
<span id="L7" class="LineNr"> 7 </span><span class="muComment"># TODO: y2038</span>
<span id="L8" class="LineNr"> 8 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='402time.mu.html#L8'>time</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L9" class="LineNr"> 9 </span>  <span class="PreProc">var</span> t: <a href='402time.mu.html#L1'>timespec</a>
<span id="L10" class="LineNr">10 </span>  <span class="PreProc">var</span> clock/<span class="Constant">ebx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>  <span class="muComment"># CLOCK_MONOTONIC</span>
<span id="L11" class="LineNr">11 </span>  <span class="PreProc">var</span> t-addr/<span class="Constant">ecx</span>: (addr <a href='402time.mu.html#L1'>timespec</a>) <span class="SpecialChar">&lt;-</span> address t
<span id="L12" class="LineNr">12 </span>  syscall_clock_gettime
<span id="L13" class="LineNr">13 </span>  <span class="PreProc">var</span> t-secs-addr/<span class="Constant">ecx</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='131table.subx.html#L26'>get</a> t-addr, tv_sec
<span id="L14" class="LineNr">14 </span>  <span class="PreProc">var</span> secs/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy *t-secs-addr
<span id="L15" class="LineNr">15 </span>  <span class="PreProc">return</span> secs
<span id="L16" class="LineNr">16 </span><span class="Delimiter">}</span>
<span id="L17" class="LineNr">17 </span>
<span id="L18" class="LineNr">18 </span><span class="muComment"># return time in nanoseconds since epoch</span>
<span id="L19" class="LineNr">19 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='402time.mu.html#L19'>ntime</a></span><span class="PreProc"> -&gt; </span>_/<span class="Constant">eax</span>: int <span class="Delimiter">{</span>
<span id="L20" class="LineNr">20 </span>  <span class="PreProc">var</span> t: <a href='402time.mu.html#L1'>timespec</a>
<span id="L21" class="LineNr">21 </span>  <span class="PreProc">var</span> clock/<span class="Constant">ebx</span>: int <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>  <span class="muComment"># CLOCK_MONOTONIC</span>
<span id="L22" class="LineNr">22 </span>  <span class="PreProc">var</span> t-addr/<span class="Constant">ecx</span>: (addr <a href='402time.mu.html#L1'>timespec</a>) <span class="SpecialChar">&lt;-</span> address t
<span id="L23" class="LineNr">23 </span>  syscall_clock_gettime
<span id="L24" class="LineNr">24 </span>  <span class="PreProc">var</span> t-nsecs-addr/<span class="Constant">ecx</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='131table.subx.html#L26'>get</a> t-addr, tv_nsec
<span id="L25" class="LineNr">25 </span>  <span class="PreProc">var</span> nsecs/<span class="Constant">eax</span>: int <span class="SpecialChar">&lt;-</span> copy *t-nsecs-addr
<span id="L26" class="LineNr">26 </span>  <span class="PreProc">return</span> nsecs
<span id="L27" class="LineNr">27 </span><span class="Delimiter">}</span>
<span id="L28" class="LineNr">28 </span>
<span id="L29" class="LineNr">29 </span><span class="muComment"># nsecs must be less than 999999999 or 0x3b9ac9ff nanoseconds</span>
<span id="L30" class="LineNr">30 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='402time.mu.html#L30'>sleep</a></span> secs: int, nsecs: int <span class="Delimiter">{</span>
<span id="L31" class="LineNr">31 </span>  <span class="PreProc">var</span> t: <a href='402time.mu.html#L1'>timespec</a>
<span id="L32" class="LineNr">32 </span>  <span class="muComment"># initialize t</span>
<span id="L33" class="LineNr">33 </span>  <span class="PreProc">var</span> tmp/<span class="Constant">eax</span>: (addr int) <span class="SpecialChar">&lt;-</span> <a href='131table.subx.html#L26'>get</a> t, tv_sec
<span id="L34" class="LineNr">34 </span>  <span class="PreProc">var</span> tmp2/<span class="Constant">ecx</span>: int <span class="SpecialChar">&lt;-</span> copy secs
<span id="L35" class="LineNr">35 </span>  copy-to *tmp, tmp2
<span id="L36" class="LineNr">36 </span>  tmp <span class="SpecialChar">&lt;-</span> <a href='131table.subx.html#L26'>get</a> t, tv_nsec
<span id="L37" class="LineNr">37 </span>  tmp2 <span class="SpecialChar">&lt;-</span> copy nsecs
<span id="L38" class="LineNr">38 </span>  copy-to *tmp, tmp2
<span id="L39" class="LineNr">39 </span>  <span class="muComment"># perform the syscall</span>
<span id="L40" class="LineNr">40 </span>  <span class="PreProc">var</span> t-addr/<span class="Constant">ebx</span>: (addr <a href='402time.mu.html#L1'>timespec</a>) <span class="SpecialChar">&lt;-</span> address t
<span id="L41" class="LineNr">41 </span>  <span class="PreProc">var</span> rem-addr/<span class="Constant">ecx</span>: (addr <a href='402time.mu.html#L1'>timespec</a>) <span class="SpecialChar">&lt;-</span> copy <span class="Constant">0</span>
<span id="L42" class="LineNr">42 </span>  syscall_nanosleep
<span id="L43" class="LineNr">43 </span><span class="Delimiter">}</span>
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