mirror of
https://github.com/jart/cosmopolitan.git
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a3865ecc3c
- Fix Makefile flaking due to ZIPOBJ_FLAGS generation - Make printf() floating point and gdtoa thread safe - Polish up the runit / runitd programs some more - Prune some more makefile dependencies
70 lines
3 KiB
C
70 lines
3 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/bits/atomic.h"
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#include "libc/calls/calls.h"
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#include "libc/dce.h"
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#include "libc/sysv/consts/clock.h"
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#include "libc/sysv/consts/futex.h"
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#include "libc/thread/freebsd.internal.h"
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#include "libc/thread/thread.h"
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int cthread_memory_wait32(int* addr, int val, const struct timespec* timeout) {
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size_t size;
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struct _umtx_time *put, ut;
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if (IsLinux() || IsOpenbsd()) {
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return sys_futex(addr, FUTEX_WAIT, val, timeout, 0);
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#if 0
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} else if (IsFreebsd()) {
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if (!timeout) {
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put = 0;
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size = 0;
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} else {
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ut._flags = 0;
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ut._clockid = CLOCK_REALTIME;
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ut._timeout = *timeout;
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put = &ut;
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size = sizeof(ut);
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}
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return _umtx_op(addr, UMTX_OP_MUTEX_WAIT, 0, &size, put);
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#endif
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} else {
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unsigned tries;
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for (tries = 1; atomic_load(addr) == val; ++tries) {
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if (tries & 7) {
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__builtin_ia32_pause();
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} else {
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sched_yield();
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}
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}
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return 0;
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}
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}
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int cthread_memory_wake32(int* addr, int n) {
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if (IsLinux() || IsOpenbsd()) {
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return sys_futex(addr, FUTEX_WAKE, n, 0, 0);
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#if 0
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} else if (IsFreebsd()) {
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return _umtx_op(addr, UMTX_OP_MUTEX_WAKE, n, 0, 0);
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#endif
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}
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return -1;
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}
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