#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
}


}
ref='/guix/'>summary</a><a href='/guix/refs/?id=c8b19d97833243e7e89f8ca83a0d641de6516271'>refs</a><a class='active' href='/guix/log/gnu/packages/iso-codes.scm'>log</a><a href='/guix/tree/gnu/packages/iso-codes.scm?id=c8b19d97833243e7e89f8ca83a0d641de6516271'>tree</a><a href='/guix/commit/gnu/packages/iso-codes.scm?id=c8b19d97833243e7e89f8ca83a0d641de6516271'>commit</a><a href='/guix/diff/gnu/packages/iso-codes.scm?id=c8b19d97833243e7e89f8ca83a0d641de6516271'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/iso-codes.scm'>
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<div class='path'>path: <a href='/guix/log/?id=c8b19d97833243e7e89f8ca83a0d641de6516271'>root</a>/<a href='/guix/log/gnu?id=c8b19d97833243e7e89f8ca83a0d641de6516271'>gnu</a>/<a href='/guix/log/gnu/packages?id=c8b19d97833243e7e89f8ca83a0d641de6516271'>packages</a>/<a href='/guix/log/gnu/packages/iso-codes.scm?id=c8b19d97833243e7e89f8ca83a0d641de6516271'>iso-codes.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/iso-codes.scm?id=c8b19d97833243e7e89f8ca83a0d641de6516271&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-09-20 11:15:06 +0000'>2021-09-20</span></td><td><a href='/guix/commit/gnu/packages/iso-codes.scm?id=c170e9b75fbda901aaf46d3b8e09975cb9b422bb'>gnu: iso-codes: Move inputs to native-inputs when cross-compiling.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/iso-codes.scm
  (iso-codes)[inputs]: Move "gettext", "perl" and "python" to ...
  (iso-codes)[native-inputs]: ... here when cross-compiling.
</span></span></td><td>Maxime Devos</td></tr>
<tr><td><span title='2020-11-09 22:08:10 +0100'>2020-11-09</span></td><td><a href='/guix/commit/gnu/packages/iso-codes.scm?id=486512dcec484e0f6903e288a2eb1bb15ac585bb'>gnu: iso-codes: Update to 4.5.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/iso-codes.scm (iso-codes): Update to 4.5.0.
</span></span></td><td>Marius Bakke</td></tr>