#include "types.hh"
#include "util.hh"
#include "affinity.hh"

#if HAVE_SCHED_H
#include <sched.h>
#endif

namespace nix {


#if HAVE_SCHED_SETAFFINITY
static bool didSaveAffinity = false;
static cpu_set_t savedAffinity;
#endif


void setAffinityTo(int cpu)
{
#if HAVE_SCHED_SETAFFINITY
    if (sched_getaffinity(0, sizeof(cpu_set_t), &savedAffinity) == -1) return;
    didSaveAffinity = true;
    printMsg(lvlDebug, format("locking this thread to CPU %1%") % cpu);
    cpu_set_t newAffinity;
    CPU_ZERO(&newAffinity);
    CPU_SET(cpu, &newAffinity);
    if (sched_setaffinity(0, sizeof(cpu_set_t), &newAffinity) == -1)
        printMsg(lvlError, format("failed to lock thread to CPU %1%") % cpu);
#endif
}


int lockToCurrentCPU()
{
#if HAVE_SCHED_SETAFFINITY
    int cpu = sched_getcpu();
    if (cpu != -1) setAffinityTo(cpu);
    return cpu;
#else
    return -1;
#endif
}


void restoreAffinity()
{
#if HAVE_SCHED_SETAFFINITY
    if (!didSaveAffinity) return;
    if (sched_setaffinity(0, sizeof(cpu_set_t), &savedAffinity) == -1)
        printMsg(lvlError, "failed to restore affinity %1%");
#endif
}


}
 the flow of data in JS program, based on UglifyJS</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/tracifyjs/about/'>about</a><a href='/tracifyjs/'>summary</a><a href='/tracifyjs/refs/?id=c12486bab4e445144968635e16b96943ed98b8c1'>refs</a><a class='active' href='/tracifyjs/log/test/compress/side_effects.js'>log</a><a href='/tracifyjs/tree/test/compress/side_effects.js?id=c12486bab4e445144968635e16b96943ed98b8c1'>tree</a><a href='/tracifyjs/commit/test/compress/side_effects.js?id=c12486bab4e445144968635e16b96943ed98b8c1'>commit</a><a href='/tracifyjs/diff/test/compress/side_effects.js?id=c12486bab4e445144968635e16b96943ed98b8c1'>diff</a></td><td class='form'><form class='right' method='get' action='/tracifyjs/log/test/compress/side_effects.js'>
<input type='hidden' name='id' value='c12486bab4e445144968635e16b96943ed98b8c1'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/tracifyjs/log/?id=c12486bab4e445144968635e16b96943ed98b8c1'>root</a>/<a href='/tracifyjs/log/test?id=c12486bab4e445144968635e16b96943ed98b8c1'>test</a>/<a href='/tracifyjs/log/test/compress?id=c12486bab4e445144968635e16b96943ed98b8c1'>compress</a>/<a href='/tracifyjs/log/test/compress/side_effects.js?id=c12486bab4e445144968635e16b96943ed98b8c1'>side_effects.js</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/tracifyjs/log/test/compress/side_effects.js?id=c12486bab4e445144968635e16b96943ed98b8c1&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-12-24 09:56:02 +0800'>2020-12-24</span></td><td><a href='/tracifyjs/commit/test/compress/side_effects.js?id=6988cd95584ce8b66716c17afad9d2dcc71717d0'>replace `keep_fargs` default to `false` (#4443)</a></td><td>Alex Lam S.L</td></tr>
<tr><td><span title='2020-12-12 07:42:29 +0800'>2020-12-12</span></td><td><a href='/tracifyjs/commit/test/compress/side_effects.js?id=8c000033d3604dcad50faf31b2dbecc4f0fb98b6'>clarify corner case in object literal (#4371)</a><span class='msg-avail'>...<span class='msg-tooltip'>closes #4366</span></span></td><td>Alex Lam S.L</td></tr>
<tr><td><span title='2020-11-29 10:05:48 +0800'>2020-11-29</span></td><td><a href='/tracifyjs/commit/test/compress/side_effects.js?id=9d34f8428bc4a5fb7d26ac953f585b2622d63171'>fix corner case in `side_effects` (#4326)</a><span class='msg-avail'>...<span class='msg-tooltip'>fixes #4325</span></span></td><td>Alex Lam S.L</td></tr>
<tr><td><span title='2020-10-04 23:43:49 +0800'>2020-10-04</span></td><td><a href='/tracifyjs/commit/test/compress/side_effects.js?id=66140b459e65e0540e567966f8dbefdbc2016f9e'>enhance `side_effects` (#4175)</a></td><td>Alex Lam S.L</td></tr>
<tr><td><span title='2020-09-18 21:35:29 +0800'>2020-09-18</span></td><td><a href='/tracifyjs/commit/test/compress/side_effects.js?id=38a46c86d7163002ad079eb9dd690e18b5c9da8f'>enhance `side_effects` (#4124)</a><span class='msg-avail'>...<span class='msg-tooltip'>- add documentation for `merge_vars`</span></span></td><td>Alex Lam S.L</td></tr>
<tr><td><span title='2020-07-01 11:33:48 +0800'>2020-07-01</span></td><td><a href='/tracifyjs/commit/test/compress/side_effects.js?id=484d3fd8c77d8d144c97b312cc2be17586fce995'>fix corner case in `side_effects` (#4009)</a><span class='msg-avail'>...<span class='msg-tooltip'>fixes #4008</span></span></td><td>Alex Lam S.L</td></tr>
<tr><td><span title='2020-06-10 19:30:37 +0800'>2020-06-10</span></td><td><a href='/tracifyjs/commit/test/compress/side_effects.js?id=1dbf7d4a3af7bf870d61b029120078c0ef499350'>fix corner case in `side_effects` (#3984)</a><span class='msg-avail'>...<span class='msg-tooltip'>fixes #3983</span></span></td><td>Alex Lam S.L</td></tr>
<tr><td><span title='2020-06-08 05:23:23 +0800'>2020-06-08</span></td><td><a href='/tracifyjs/commit/test/compress/side_effects.js?id=df3bb8028a7cd8a69a3c76090d12f808ca7abc3b'>fix corner cases related to `in` (#3964)</a></td><td>Alex Lam S.L</td></tr>
<tr><td><span title='2020-06-05 04:06:43 +0800'>2020-06-05</span></td><td><a href='/tracifyjs/commit/test/compress/side_effects.js?id=04fd3d90f8600bc8c6c5715abce06617110d88d6'>fix corner cases in `assignments`, `reduce_vars` &amp; `unused` (#3950)</a><span class='msg-avail'>...<span class='msg-tooltip'>fixes #3949
fixes #3951</span></span></td><td>Alex Lam S.L</td></tr>
<tr><td><span title='2019-12-27 14:24:54 +0000'>2019-12-27</span></td><td><a href='/tracifyjs/commit/test/compress/side_effects.js?id=a19d31dd33abdce5ff162d802705cd97cec10b5f'>fix corner case in `unsafe` (#3646)</a></td><td>Alex Lam S.L</td></tr>
</table><ul class='pager'></ul></div> <!-- class=content -->
                         <div class=footer>generated by
                             <a href="https://git.zx2c4.com/cgit/about/">
                                 cgit
                             </a>
                         </div>
                        </div> <!-- id=cgit -->
</body>
</html>