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As c11 already provided timespec_get, to avoid symbol conflict, use c23_timespec_get as the function name and define timespec_get c23_timespec_get to achieve that Signed-off-by: Yonggang Luo <luoyonggang@gmail.com> Reviewed-by: Jesse Natalie <jenatali@microsoft.com> Acked-by: David Heidelberg <david.heidelberg@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23733>
85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
/*
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* Copyright 2022 Yonggang Luo
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* SPDX-License-Identifier: MIT
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*
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* C11 <time.h> emulation library
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*/
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#ifndef C11_TIME_H_INCLUDED_
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#define C11_TIME_H_INCLUDED_
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#include <time.h>
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/*---------------------------- macros ---------------------------*/
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/* Refer to https://htmlpreview.github.io/?https://icube-forge.unistra.fr/icps/c23-library/-/raw/main/README.html#time_monotonic-time_active-time_thread_active */
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#if defined(TIME_UTC) && \
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defined(TIME_MONOTONIC) && \
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defined(TIME_ACTIVE) && \
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defined(TIME_THREAD_ACTIVE) && \
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defined(TIME_MONOTONIC_RAW)
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/* all needed time base is implemented */
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#else
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#define _TIMESPEC_GET_NEED_IMPL
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#endif
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#ifdef _TIMESPEC_GET_NEED_IMPL
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#undef TIME_UTC
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#undef TIME_MONOTONIC
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#undef TIME_ACTIVE
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#undef TIME_THREAD_ACTIVE
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#undef TIME_MONOTONIC_RAW
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/* c11 */
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#define TIME_UTC 1
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/* c23 */
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#define TIME_MONOTONIC 2
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#define TIME_ACTIVE 3
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#define TIME_THREAD_ACTIVE 4
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#define TIME_MONOTONIC_RAW 5
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#define timespec_get c23_timespec_get
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*---------------------------- types ----------------------------*/
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/*
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* On MINGW `struct timespec` present but `timespec_get` may not present;
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* On MSVC `struct timespec` and `timespec_get` present at the same time;
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* So detecting `HAVE_STRUCT_TIMESPEC` in meson script dynamically.
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*/
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#ifndef HAVE_STRUCT_TIMESPEC
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struct timespec
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{
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time_t tv_sec; // Seconds - >= 0
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long tv_nsec; // Nanoseconds - [0, 999999999]
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};
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#endif
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/*-------------------------- functions --------------------------*/
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#if defined(_TIMESPEC_GET_NEED_IMPL)
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#define _TIMESPEC_GET_NEED_DECL
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#elif defined(__APPLE__) && defined(__cplusplus) && (__cplusplus < 201703L)
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/* On macOS, the guard for declaration of timespec_get is by
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* (defined(__cplusplus) && __cplusplus >= 201703L),
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* fix the declaration for C++14 and lower here
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*/
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#define _TIMESPEC_GET_NEED_DECL
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#endif
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#ifdef _TIMESPEC_GET_NEED_DECL
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/*-------------------- 7.25.7 Time functions --------------------*/
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// 7.25.6.1
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int
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timespec_get(struct timespec *ts, int base);
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#undef _TIMESPEC_GET_NEED_DECL
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* C11_TIME_H_INCLUDED_ */
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