mirror of
https://github.com/jart/cosmopolitan.git
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73 lines
3.4 KiB
C
73 lines
3.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/sched_param.h"
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#include "libc/dce.h"
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#include "libc/errno.h"
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#include "libc/limits.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/sched.h"
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#include "libc/testlib/testlib.h"
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#define DEFAULT_POLICY SCHED_OTHER
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void SetUp(void) {
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if (IsFreebsd() && getuid() != 0) {
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exit(0);
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}
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if (IsXnu() || IsWindows() || IsOpenbsd() || IsWindows()) {
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exit(0);
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}
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int oldpolicy = sched_getscheduler(0);
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struct sched_param p = {sched_get_priority_min(DEFAULT_POLICY)};
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EXPECT_SYS(0, oldpolicy, sched_setscheduler(0, DEFAULT_POLICY, &p));
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}
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bool CanTuneRealtimeSchedulers(void) {
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int e = errno;
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int policy = SCHED_FIFO;
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struct sched_param p = {sched_get_priority_min(policy)};
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if (sched_setscheduler(0, policy, &p) != -1) {
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struct sched_param p = {sched_get_priority_min(DEFAULT_POLICY)};
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EXPECT_SYS(0, policy, sched_setscheduler(0, DEFAULT_POLICY, &p));
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return true;
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} else if (errno == EPERM) {
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errno = e;
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return false;
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} else {
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abort();
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}
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}
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TEST(sched_getscheduler, einval) {
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ASSERT_SYS(IsLinux() ? EINVAL : ESRCH, -1, sched_getscheduler(INT_MIN));
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}
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TEST(sched_setscheduler, test) {
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struct sched_param p = {sched_get_priority_min(SCHED_OTHER)};
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EXPECT_SYS(0, DEFAULT_POLICY, sched_setscheduler(0, SCHED_OTHER, &p));
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}
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TEST(sched_setscheduler, testMidpoint) {
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if (!CanTuneRealtimeSchedulers()) return;
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struct sched_param p = {(sched_get_priority_min(SCHED_FIFO) +
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sched_get_priority_max(SCHED_FIFO)) /
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2};
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EXPECT_SYS(0, DEFAULT_POLICY, sched_setscheduler(0, SCHED_FIFO, &p));
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}
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