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141 lines
4.6 KiB
C++
141 lines
4.6 KiB
C++
//===--- Clock.cpp - Time and clock resolution ----------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Runtime/Concurrency.h"
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#include "swift/Runtime/Once.h"
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#include <time.h>
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#if defined(_WIN32)
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#define WIN32_LEAN_AND_MEAN
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#define NOMINMAX
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#include <Windows.h>
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#include <realtimeapiset.h>
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#endif
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#include "Error.h"
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using namespace swift;
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SWIFT_EXPORT_FROM(swift_Concurrency)
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SWIFT_CC(swift)
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void swift_get_time(
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long long *seconds,
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long long *nanoseconds,
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swift_clock_id clock_id) {
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switch (clock_id) {
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case swift_clock_id_continuous: {
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struct timespec continuous;
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#if defined(__linux__)
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clock_gettime(CLOCK_BOOTTIME, &continuous);
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#elif defined(__APPLE__)
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clock_gettime(CLOCK_MONOTONIC_RAW, &continuous);
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#elif (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__wasi__))
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clock_gettime(CLOCK_MONOTONIC, &continuous);
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#elif defined(_WIN32)
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// This needs to match what swift-corelibs-libdispatch does
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// QueryInterruptTimePrecise() outputs a value measured in 100ns
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// units. We must divide the output by 10,000,000 to get a value in
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// seconds and multiply the remainder by 100 to get nanoseconds.
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ULONGLONG interruptTime;
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(void)QueryInterruptTimePrecise(&interruptTime);
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continuous.tv_sec = interruptTime / 10'000'000;
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continuous.tv_nsec = (interruptTime % 10'000'000) * 100;
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#else
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#error Missing platform continuous time definition
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#endif
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*seconds = continuous.tv_sec;
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*nanoseconds = continuous.tv_nsec;
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return;
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}
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case swift_clock_id_suspending: {
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struct timespec suspending;
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#if defined(__linux__)
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clock_gettime(CLOCK_MONOTONIC, &suspending);
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#elif defined(__APPLE__)
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clock_gettime(CLOCK_UPTIME_RAW, &suspending);
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#elif defined(__wasi__)
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clock_gettime(CLOCK_MONOTONIC, &suspending);
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#elif (defined(__OpenBSD__) || defined(__FreeBSD__))
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clock_gettime(CLOCK_UPTIME, &suspending);
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#elif defined(_WIN32)
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// This needs to match what swift-corelibs-libdispatch does
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// QueryUnbiasedInterruptTimePrecise() outputs a value measured in 100ns
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// units. We must divide the output by 10,000,000 to get a value in
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// seconds and multiply the remainder by 100 to get nanoseconds.
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ULONGLONG unbiasedTime;
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(void)QueryUnbiasedInterruptTimePrecise(&unbiasedTime);
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suspending.tv_sec = unbiasedTime / 10'000'000;
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suspending.tv_nsec = (unbiasedTime % 10'000'000) * 100;
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#else
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#error Missing platform suspending time definition
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#endif
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*seconds = suspending.tv_sec;
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*nanoseconds = suspending.tv_nsec;
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return;
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}
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}
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swift_Concurrency_fatalError(0, "Fatal error: invalid clock ID %d\n",
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clock_id);
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}
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SWIFT_EXPORT_FROM(swift_Concurrency)
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SWIFT_CC(swift)
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void swift_get_clock_res(
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long long *seconds,
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long long *nanoseconds,
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swift_clock_id clock_id) {
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switch (clock_id) {
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case swift_clock_id_continuous: {
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struct timespec continuous;
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#if defined(__linux__)
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clock_getres(CLOCK_BOOTTIME, &continuous);
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#elif defined(__APPLE__)
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clock_getres(CLOCK_MONOTONIC_RAW, &continuous);
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#elif (defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__wasi__))
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clock_getres(CLOCK_MONOTONIC, &continuous);
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#elif defined(_WIN32)
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continuous.tv_sec = 0;
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continuous.tv_nsec = 100;
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#else
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#error Missing platform continuous time definition
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#endif
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*seconds = continuous.tv_sec;
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*nanoseconds = continuous.tv_nsec;
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return;
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}
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case swift_clock_id_suspending: {
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struct timespec suspending;
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#if defined(__linux__)
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clock_getres(CLOCK_MONOTONIC_RAW, &suspending);
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#elif defined(__APPLE__)
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clock_getres(CLOCK_UPTIME_RAW, &suspending);
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#elif defined(__wasi__)
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clock_getres(CLOCK_MONOTONIC, &suspending);
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#elif (defined(__OpenBSD__) || defined(__FreeBSD__))
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clock_getres(CLOCK_UPTIME, &suspending);
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#elif defined(_WIN32)
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suspending.tv_sec = 0;
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suspending.tv_nsec = 100;
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#else
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#error Missing platform suspending time definition
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#endif
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*seconds = suspending.tv_sec;
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*nanoseconds = suspending.tv_nsec;
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return;
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}
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}
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swift_Concurrency_fatalError(0, "Fatal error: invalid clock ID %d\n",
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clock_id);
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}
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