mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-10-26 03:00:57 +00:00
b41f91c658
The cosmopolitan command interpreter now has 13 builtin commands, variable support, support for ; / && / || syntax, asynchronous support, and plenty of unit tests with bug fixes. This change fixes a bug in posix_spawn() with null envp arg. strace logging now uses atomic writes for scatter functions. Breaking change renaming GetCpuCount() to _getcpucount(). TurfWar is now updated to use the new token bucket algorithm. WIN32 affinity masks now inherit across fork() and execve().
87 lines
3.8 KiB
C
87 lines
3.8 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 2020 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/internal.h"
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#include "libc/calls/sched-sysv.internal.h"
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#include "libc/calls/struct/cpuset.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/nt/enum/processaccess.h"
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#include "libc/nt/process.h"
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#include "libc/nt/runtime.h"
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#include "libc/sysv/errfuns.h"
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static dontinline textwindows int sys_sched_setaffinity_nt(
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int pid, uint64_t size, const cpu_set_t *bitset) {
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int rc;
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int64_t h, closeme = -1;
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if (!pid || pid == getpid()) {
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h = GetCurrentProcess();
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} else if (__isfdkind(pid, kFdProcess)) {
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h = g_fds.p[pid].handle;
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} else {
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h = OpenProcess(kNtProcessSetInformation | kNtProcessQueryInformation,
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false, pid);
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if (!h) return __winerr();
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closeme = h;
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}
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if (SetProcessAffinityMask(h, bitset->__bits[0])) {
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rc = 0;
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} else {
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rc = __winerr();
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}
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if (closeme != -1) {
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CloseHandle(closeme);
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}
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return rc;
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}
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/**
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* Asks kernel to only schedule process on particular CPUs.
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*
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* Affinity masks are inherited across fork() and execve() boundaries.
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*
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* @param pid is the process or process id (or 0 for caller)
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* @param size is bytes in bitset, which should be `sizeof(cpuset_t)`
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* @return 0 on success, or -1 w/ errno
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* @raise ENOSYS if not Linux, FreeBSD, NetBSD, or Windows
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* @see pthread_getaffinity_np() for threads
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*/
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int sched_setaffinity(int pid, size_t size, const cpu_set_t *bitset) {
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int rc;
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if (size != sizeof(cpu_set_t)) {
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rc = einval();
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} else if (IsWindows()) {
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rc = sys_sched_setaffinity_nt(pid, size, bitset);
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} else if (IsFreebsd()) {
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rc = sys_sched_setaffinity_freebsd(CPU_LEVEL_WHICH, CPU_WHICH_PID, pid, 32,
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bitset);
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} else if (IsNetbsd()) {
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rc = sys_sched_setaffinity_netbsd(P_ALL_LWPS, pid, 32, bitset);
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} else {
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rc = sys_sched_setaffinity(pid, size, bitset);
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}
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STRACE("sched_setaffinity(%d, %'zu, %p) → %d% m", pid, size, bitset, rc);
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return rc;
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}
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