1/*
2 * Copyright 2016-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#pragma once
18
19#include <stdint.h>
20#include <time.h>
21
22#include <folly/portability/Config.h>
23
24// OSX is a pain. The XCode 8 SDK always declares clock_gettime
25// even if the target OS version doesn't support it, so you get
26// an error at runtime because it can't resolve the symbol. We
27// solve that by pretending we have it here in the header and
28// then enable our implementation on the source side so that
29// gets linked in instead.
30#if __MACH__ && \
31 (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12 || \
32 __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_10_0)
33
34#ifdef FOLLY_HAVE_CLOCK_GETTIME
35#undef FOLLY_HAVE_CLOCK_GETTIME
36#endif
37
38#define FOLLY_HAVE_CLOCK_GETTIME 1
39#define FOLLY_FORCE_CLOCK_GETTIME_DEFINITION 1
40
41#endif
42
43// These aren't generic implementations, so we can only declare them on
44// platforms we support.
45#if !FOLLY_HAVE_CLOCK_GETTIME && (defined(__MACH__) || defined(_WIN32))
46#define CLOCK_REALTIME 0
47#define CLOCK_MONOTONIC 1
48#define CLOCK_PROCESS_CPUTIME_ID 2
49#define CLOCK_THREAD_CPUTIME_ID 3
50
51typedef uint8_t clockid_t;
52extern "C" int clock_gettime(clockid_t clk_id, struct timespec* ts);
53extern "C" int clock_getres(clockid_t clk_id, struct timespec* ts);
54#endif
55
56#ifdef _WIN32
57#define TM_YEAR_BASE (1900)
58
59extern "C" {
60char* asctime_r(const tm* tm, char* buf);
61char* ctime_r(const time_t* t, char* buf);
62tm* gmtime_r(const time_t* t, tm* res);
63tm* localtime_r(const time_t* t, tm* o);
64int nanosleep(const struct timespec* request, struct timespec* remain);
65char* strptime(
66 const char* __restrict buf,
67 const char* __restrict fmt,
68 struct tm* __restrict tm);
69}
70#endif
71