mirror of
https://github.com/jart/cosmopolitan.git
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55 lines
2.9 KiB
C
55 lines
2.9 KiB
C
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/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2016 Google Inc. │
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│ │
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│ Licensed under the Apache License, Version 2.0 (the "License"); │
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│ you may not use this file except in compliance with the License. │
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│ You may obtain a copy of the License at │
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│ │
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│ http://www.apache.org/licenses/LICENSE-2.0 │
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│ │
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│ Unless required by applicable law or agreed to in writing, software │
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│ distributed under the License is distributed on an "AS IS" BASIS, │
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│ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. │
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│ See the License for the specific language governing permissions and │
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│ limitations under the License. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/struct/timespec.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/clock.h"
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#include "third_party/nsync/time.h"
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asm(".ident\t\"\\n\\n\
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*NSYNC (Apache 2.0)\\n\
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Copyright 2016 Google, Inc.\\n\
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https://github.com/google/nsync\"");
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// clang-format off
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#define NSYNC_NS_IN_S_ (1000 * 1000 * 1000)
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/* Return the maximum t, assuming it's an integral
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type, and the representation is not too strange. */
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#define MAX_INT_TYPE(t) (((t)~(t)0) > 1? /*is t unsigned?*/ \
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(t)~(t)0 : /*unsigned*/ \
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(t) ((((uintmax_t)1) << (sizeof (t) * CHAR_BIT - 1)) - 1)) /*signed*/
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const nsync_time nsync_time_no_deadline =
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NSYNC_TIME_STATIC_INIT (MAX_INT_TYPE (int64_t), NSYNC_NS_IN_S_ - 1);
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const nsync_time nsync_time_zero = NSYNC_TIME_STATIC_INIT (0, 0);
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nsync_time nsync_time_sleep (nsync_time delay) {
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struct timespec ts;
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struct timespec remain;
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memset (&ts, 0, sizeof (ts));
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ts.tv_sec = NSYNC_TIME_SEC (delay);
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ts.tv_nsec = NSYNC_TIME_NSEC (delay);
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if (nanosleep (&ts, &remain) == 0) {
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/* nanosleep() is not required to fill in "remain"
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if it returns 0. */
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memset (&remain, 0, sizeof (remain));
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}
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return (remain);
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}
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