#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
}


}
 my engineering thesis at AGH University of Science and Technology in Kraków, Poland</td><td class='sub right'></td></tr></table>
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<div class='path'>path: <a href='/AGH-engineering-thesis/commit/?id=5cf95f5885033c04ce26c53a0e10e8f2636eac25'>root</a>/<a href='/AGH-engineering-thesis/commit/COPYING?id=5cf95f5885033c04ce26c53a0e10e8f2636eac25'>COPYING</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='5cf95f5885033c04ce26c53a0e10e8f2636eac25'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Wojciech Kosior &lt;kwojtus@protonmail.com&gt;</td><td class='right'>2020-09-02 14:20:39 +0200</td></tr>
<tr><th>committer</th><td>Wojciech Kosior &lt;kwojtus@protonmail.com&gt;</td><td class='right'>2020-09-02 14:20:39 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/AGH-engineering-thesis/commit/COPYING?id=5cf95f5885033c04ce26c53a0e10e8f2636eac25'>5cf95f5885033c04ce26c53a0e10e8f2636eac25</a> (<a href='/AGH-engineering-thesis/patch/COPYING?id=5cf95f5885033c04ce26c53a0e10e8f2636eac25'>patch</a>)</td></tr>
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<div class='commit-subject'>add bench for embedded ram wishbone slave</div><div class='commit-msg'></div><div class='diffstat-header'><a href='/AGH-engineering-thesis/diff/?id=5cf95f5885033c04ce26c53a0e10e8f2636eac25'>Diffstat</a> (limited to 'COPYING')</div><table summary='diffstat' class='diffstat'></table><div class='diffstat-summary'>0 files changed, 0 insertions, 0 deletions</div><table summary='diff' class='diff'><tr><td></td></tr></table></div> <!-- class=content -->
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