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편집 파일: sysprof-clock.h

/* sysprof-clock.h * * Copyright 2016-2019 Christian Hergert <chergert@redhat.com> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Subject to the terms and conditions of this license, each copyright holder * and contributor hereby grants to those receiving rights under this license * a perpetual, worldwide, non-exclusive, no-charge, royalty-free, * irrevocable (except for failure to satisfy the conditions of this license) * patent license to make, have made, use, offer to sell, sell, import, and * otherwise transfer this software, where such license applies only to those * patent claims, already acquired or hereafter acquired, licensable by such * copyright holder or contributor that are necessarily infringed by: * * (a) their Contribution(s) (the licensed copyrights of copyright holders * and non-copyrightable additions of contributors, in source or binary * form) alone; or * * (b) combination of their Contribution(s) with the work of authorship to * which such Contribution(s) was added by such copyright holder or * contributor, if, at the time the Contribution is added, such addition * causes such combination to be necessarily infringed. The patent license * shall not apply to any other combinations which include the * Contribution. * * Except as expressly stated above, no rights or licenses from any copyright * holder or contributor is granted under this license, whether expressly, by * implication, estoppel or otherwise. * * DISCLAIMER * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * SPDX-License-Identifier: BSD-2-Clause-Patent */ #pragma once #include <stdint.h> #include <time.h> #include "sysprof-macros.h" #include "sysprof-version-macros.h" SYSPROF_BEGIN_DECLS typedef int SysprofClock; typedef int64_t SysprofTimeStamp; typedef int32_t SysprofTimeSysprofan; #define SYSPROF_NSEC_PER_SEC SYSPROF_INT64_CONSTANT(1000000000) SYSPROF_AVAILABLE_IN_ALL SysprofClock sysprof_clock; static inline SysprofTimeStamp sysprof_clock_get_current_time (void) { struct timespec ts; SysprofClock clock = sysprof_clock; if SYSPROF_UNLIKELY (clock == -1) #ifdef __APPLE__ clock = _CLOCK_MONOTONIC; #else clock = CLOCK_MONOTONIC; #endif clock_gettime (clock, &ts); return (ts.tv_sec * SYSPROF_NSEC_PER_SEC) + ts.tv_nsec; } static inline SysprofTimeSysprofan sysprof_clock_get_relative_time (SysprofTimeStamp epoch) { return sysprof_clock_get_current_time () - epoch; } SYSPROF_AVAILABLE_IN_ALL void sysprof_clock_init (void); SYSPROF_END_DECLS