#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
}


}
ummary</a><a href='/guix/refs/?id=e28ffb7341707a9fa9744d5db25f2ad66e94b9c8'>refs</a><a class='active' href='/guix/log/gnu/tests/samba.scm'>log</a><a href='/guix/tree/gnu/tests/samba.scm?id=e28ffb7341707a9fa9744d5db25f2ad66e94b9c8'>tree</a><a href='/guix/commit/gnu/tests/samba.scm?id=e28ffb7341707a9fa9744d5db25f2ad66e94b9c8'>commit</a><a href='/guix/diff/gnu/tests/samba.scm?id=e28ffb7341707a9fa9744d5db25f2ad66e94b9c8'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/tests/samba.scm'>
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<div class='path'>path: <a href='/guix/log/?id=e28ffb7341707a9fa9744d5db25f2ad66e94b9c8'>root</a>/<a href='/guix/log/gnu?id=e28ffb7341707a9fa9744d5db25f2ad66e94b9c8'>gnu</a>/<a href='/guix/log/gnu/tests?id=e28ffb7341707a9fa9744d5db25f2ad66e94b9c8'>tests</a>/<a href='/guix/log/gnu/tests/samba.scm?id=e28ffb7341707a9fa9744d5db25f2ad66e94b9c8'>samba.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/tests/samba.scm?id=e28ffb7341707a9fa9744d5db25f2ad66e94b9c8&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-09-24 09:41:24 +0200'>2022-09-24</span></td><td><a href='/guix/commit/gnu/tests/samba.scm?id=e1ce1009156d7923bcf1b93ca3918c9b18123007'>services: Add wsdd service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* doc/guix.texi: Add documentation for wsdd service.
* gnu/services/samba.scm (&lt;wsdd-configuration&gt;): New record.
(wsdd-service-type): New variable.
(wsdd-shepherd-services): New procedure.
* gnu/tests/samba.scm (%wsdd-os): Add variable.
(run-wsdd-test): New procedure.
(%test-wsdd): New variable.

Signed-off-by: Lars-Dominik Braun &lt;lars@6xq.net&gt;
</span></span></td><td>Simon Streit</td></tr>
<tr><td><span title='2022-09-24 09:38:57 +0200'>2022-09-24</span></td><td><a href='/guix/commit/gnu/tests/samba.scm?id=d68721c55ae683d5939d1cf88f15081aa97c2b2b'>services: Add samba service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/samba.scm: New file.
* gnu/tests/samba.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add them.
* po/guix/POTFILES.in Add 'gnu/services/samba.scm'.
* doc/guix.texi: Document it.

Signed-off-by: Lars-Dominik Braun &lt;lars@6xq.net&gt;
</span></span></td><td>Simon Streit</td></tr>