mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-05 05:08:44 +00:00
f2af97711b
- Improve compatibility with Blink virtual machine - Add non-POSIX APIs for joining threads and signal masks - Never ever use anything except 32-bit integers for atomics - Add some `#undef` statements to workaround `ctags` problems
77 lines
3.4 KiB
C
77 lines
3.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2022 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/sched-sysv.internal.h"
|
|
#include "libc/calls/struct/cpuset.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/intrin/atomic.h"
|
|
#include "libc/intrin/describeflags.internal.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
#include "libc/thread/posixthread.internal.h"
|
|
|
|
/**
|
|
* Gets CPU affinity for thread.
|
|
*
|
|
* @param size is bytes in bitset, which should be `sizeof(cpu_set_t)`
|
|
* @return 0 on success, or errno on error
|
|
* @raise EINVAL if `size` or `bitset` is invalid
|
|
* @raise ENOSYS if not Linux, FreeBSD, or NetBSD
|
|
* @raise ESRCH if thread isn't alive
|
|
*/
|
|
errno_t pthread_getaffinity_np(pthread_t thread, size_t size,
|
|
cpu_set_t *bitset) {
|
|
int e, rc, tid;
|
|
|
|
if (!(rc = pthread_getunique_np(thread, &tid))) {
|
|
e = errno;
|
|
if (size != sizeof(cpu_set_t)) {
|
|
rc = einval();
|
|
} else if (IsWindows() || IsMetal() || IsOpenbsd()) {
|
|
rc = enosys();
|
|
} else if (IsFreebsd()) {
|
|
if (!sys_sched_getaffinity_freebsd(CPU_LEVEL_WHICH, CPU_WHICH_TID, tid,
|
|
32, bitset)) {
|
|
rc = 32;
|
|
} else {
|
|
rc = -1;
|
|
}
|
|
} else if (IsNetbsd()) {
|
|
if (!sys_sched_getaffinity_netbsd(tid, 0, 32, bitset)) {
|
|
rc = 32;
|
|
} else {
|
|
rc = -1;
|
|
}
|
|
} else {
|
|
rc = sys_sched_getaffinity(tid, size, bitset);
|
|
}
|
|
if (rc > 0) {
|
|
if (rc < size) {
|
|
bzero((char *)bitset + rc, size - rc);
|
|
}
|
|
rc = 0;
|
|
}
|
|
}
|
|
|
|
STRACE("pthread_getaffinity_np(%d, %'zu, %p) → %s", tid, size, bitset,
|
|
DescribeErrno(rc));
|
|
return rc;
|
|
}
|