#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
}


}
 href='/guix/refs/?id=66158f535a032137bf0fc88df562defab9cbeb91'>refs</a><a class='active' href='/guix/log/tests/rpm.scm'>log</a><a href='/guix/tree/tests/rpm.scm?id=66158f535a032137bf0fc88df562defab9cbeb91'>tree</a><a href='/guix/commit/tests/rpm.scm?id=66158f535a032137bf0fc88df562defab9cbeb91'>commit</a><a href='/guix/diff/tests/rpm.scm?id=66158f535a032137bf0fc88df562defab9cbeb91'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/rpm.scm'>
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<div class='path'>path: <a href='/guix/log/?id=66158f535a032137bf0fc88df562defab9cbeb91'>root</a>/<a href='/guix/log/tests?id=66158f535a032137bf0fc88df562defab9cbeb91'>tests</a>/<a href='/guix/log/tests/rpm.scm?id=66158f535a032137bf0fc88df562defab9cbeb91'>rpm.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/tests/rpm.scm?id=66158f535a032137bf0fc88df562defab9cbeb91&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-02-19 21:13:23 -0500'>2023-02-19</span></td><td><a href='/guix/commit/tests/rpm.scm?id=598f4c509bbfec2b983a8ee246cce0a0fe45ec7f'>pack: Add RPM format.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/rpm.scm: New file.
* guix/scripts/pack.scm (rpm-archive): New procedure.
(%formats): Register it.
(show-formats): Add it.
(guix-pack): Register supported extra-options for the rpm format.
* tests/pack.scm (rpm-for-tests): New variable.
("rpm archive can be installed/uninstalled"): New test.
* tests/rpm.scm: New test.
* doc/guix.texi (Invoking guix pack): Document it.
</span></span></td><td>Maxim Cournoyer</td></tr>