#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
}


}
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<div class='path'>path: <a href='/guix/log/?id=ec9c5a8ff5da1dc08759fbca467a74fe8f5bd9db&amp;showmsg=1'>root</a>/<a href='/guix/log/gnu?id=ec9c5a8ff5da1dc08759fbca467a74fe8f5bd9db&amp;showmsg=1'>gnu</a>/<a href='/guix/log/gnu/build?id=ec9c5a8ff5da1dc08759fbca467a74fe8f5bd9db&amp;showmsg=1'>build</a>/<a href='/guix/log/gnu/build/icecat-extension.scm?id=ec9c5a8ff5da1dc08759fbca467a74fe8f5bd9db&amp;showmsg=1'>icecat-extension.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/build/icecat-extension.scm?id=ec9c5a8ff5da1dc08759fbca467a74fe8f5bd9db'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2023-12-10 21:46:52 +0100'>2023-12-10</span></td><td class='logsubject'><a href='/guix/commit/gnu/build/icecat-extension.scm?id=1300c316e9ab27ce042d41b3ebd6fad7e3c26efb'>gnu: ‘make-icecat-extension’ inherits package location.</a></td><td>Ludovic Courtès</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
This is an improvement for the purposes of ‘guix edit’ &amp; co.

* gnu/build/icecat-extension.scm (make-icecat-extension): Add ‘location’
field.

Change-Id: I896ae6823b3fe4ea013fa74e2c536f45664d8042


</td></tr>
<tr class='logheader'><td><span title='2023-10-23 11:19:02 +0200'>2023-10-23</span></td><td class='logsubject'><a href='/guix/commit/gnu/build/icecat-extension.scm?id=25043e01b6cb6696ffdc6cdedd9cdf8235bb695c'>gnu: icecat: Support Guix packaged extensions and native manifests.</a></td><td>Clément Lassieur</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
* gnu/build/icecat-extension.scm: New file with a MAKE-ICECAT-EXTENSION
procedure that makes sure the add-on directory is a symlink, so that Icecat
can normalize it into a package store path.
* gnu/local.mk (dist_patch_DATA): Register it, as well as new patches.
* gnu/packages/browser-extensions.scm (ublock-origin)[properties]: Store the
add-on ID so that it is accessible in MAKE-ICECAT-EXTENSION.
[arguments]: Use the add-on ID as root directory.
(ublock-origin/icecat): New procedure.
* gnu/packages/gnuzilla.scm (icecat-minimal)[arguments]: Rewrite the unused
'apply-guix-specific-patches' phase so that it applies the following two
patches.
[native-search-paths]: New field.
* gnu/packages/patches/icecat-compare-paths.patch: New patch that compares
add-on paths (which are package store paths) to detect package changes.
* gnu/packages/patches/icecat-use-system-wide-dir.patch: New patch that
replaces "/usr/lib/mozilla" (the system-wide directory for extensions and
native manifests) with "$ICECAT_SYSTEM_DIR".


</td></tr>