| #region Copyright notice and license |
| // Copyright 2015 gRPC authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| #endregion |
| using System; |
| using System.Runtime.InteropServices; |
| using System.Threading; |
| |
| using Grpc.Core.Utils; |
| |
| namespace Grpc.Core.Internal |
| { |
| /// <summary> |
| /// gpr_timespec from grpc/support/time.h |
| /// </summary> |
| [StructLayout(LayoutKind.Sequential)] |
| internal struct Timespec |
| { |
| const long NanosPerSecond = 1000 * 1000 * 1000; |
| const long NanosPerTick = 100; |
| const long TicksPerSecond = NanosPerSecond / NanosPerTick; |
| |
| static readonly NativeMethods Native = NativeMethods.Get(); |
| static readonly DateTime UnixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc); |
| |
| public Timespec(long tv_sec, int tv_nsec) : this(tv_sec, tv_nsec, ClockType.Realtime) |
| { |
| } |
| |
| public Timespec(long tv_sec, int tv_nsec, ClockType clock_type) |
| { |
| this.tv_sec = tv_sec; |
| this.tv_nsec = tv_nsec; |
| this.clock_type = clock_type; |
| } |
| |
| private long tv_sec; |
| private int tv_nsec; |
| private ClockType clock_type; |
| |
| /// <summary> |
| /// Timespec a long time in the future. |
| /// </summary> |
| public static Timespec InfFuture |
| { |
| get |
| { |
| return new Timespec(long.MaxValue, 0, ClockType.Realtime); |
| } |
| } |
| |
| /// <summary> |
| /// Timespec a long time in the past. |
| /// </summary> |
| public static Timespec InfPast |
| { |
| get |
| { |
| return new Timespec(long.MinValue, 0, ClockType.Realtime); |
| } |
| } |
| |
| /// <summary> |
| /// Return Timespec representing the current time. |
| /// </summary> |
| public static Timespec Now |
| { |
| get |
| { |
| return Native.gprsharp_now(ClockType.Realtime); |
| } |
| } |
| |
| /// <summary> |
| /// Seconds since unix epoch. |
| /// </summary> |
| public long TimevalSeconds |
| { |
| get |
| { |
| return tv_sec; |
| } |
| } |
| |
| /// <summary> |
| /// The nanoseconds part of timeval. |
| /// </summary> |
| public int TimevalNanos |
| { |
| get |
| { |
| return tv_nsec; |
| } |
| } |
| |
| /// <summary> |
| /// Converts the timespec to desired clock type. |
| /// </summary> |
| public Timespec ToClockType(ClockType targetClock) |
| { |
| return Native.gprsharp_convert_clock_type(this, targetClock); |
| } |
| |
| /// <summary> |
| /// Converts Timespec to DateTime. |
| /// Timespec needs to be of type GPRClockType.Realtime and needs to represent a legal value. |
| /// DateTime has lower resolution (100ns), so rounding can occurs. |
| /// Value are always rounded up to the nearest DateTime value in the future. |
| /// |
| /// For Timespec.InfFuture or if timespec is after the largest representable DateTime, DateTime.MaxValue is returned. |
| /// For Timespec.InfPast or if timespec is before the lowest representable DateTime, DateTime.MinValue is returned. |
| /// |
| /// Unless DateTime.MaxValue or DateTime.MinValue is returned, the resulting DateTime is always in UTC |
| /// (DateTimeKind.Utc) |
| /// </summary> |
| public DateTime ToDateTime() |
| { |
| GrpcPreconditions.CheckState(tv_nsec >= 0 && tv_nsec < NanosPerSecond); |
| GrpcPreconditions.CheckState(clock_type == ClockType.Realtime); |
| |
| // fast path for InfFuture |
| if (this.Equals(InfFuture)) |
| { |
| return DateTime.MaxValue; |
| } |
| |
| // fast path for InfPast |
| if (this.Equals(InfPast)) |
| { |
| return DateTime.MinValue; |
| } |
| |
| try |
| { |
| // convert nanos to ticks, round up to the nearest tick |
| long ticksFromNanos = tv_nsec / NanosPerTick + ((tv_nsec % NanosPerTick != 0) ? 1 : 0); |
| long ticksTotal = checked(tv_sec * TicksPerSecond + ticksFromNanos); |
| return UnixEpoch.AddTicks(ticksTotal); |
| } |
| catch (OverflowException) |
| { |
| // ticks out of long range |
| return tv_sec > 0 ? DateTime.MaxValue : DateTime.MinValue; |
| } |
| catch (ArgumentOutOfRangeException) |
| { |
| // resulting date time would be larger than MaxValue |
| return tv_sec > 0 ? DateTime.MaxValue : DateTime.MinValue; |
| } |
| } |
| |
| /// <summary> |
| /// Creates DateTime to Timespec. |
| /// DateTime has to be in UTC (DateTimeKind.Utc) unless it's DateTime.MaxValue or DateTime.MinValue. |
| /// For DateTime.MaxValue of date time after the largest representable Timespec, Timespec.InfFuture is returned. |
| /// For DateTime.MinValue of date time before the lowest representable Timespec, Timespec.InfPast is returned. |
| /// </summary> |
| /// <returns>The date time.</returns> |
| /// <param name="dateTime">Date time.</param> |
| public static Timespec FromDateTime(DateTime dateTime) |
| { |
| if (dateTime == DateTime.MaxValue) |
| { |
| return Timespec.InfFuture; |
| } |
| |
| if (dateTime == DateTime.MinValue) |
| { |
| return Timespec.InfPast; |
| } |
| |
| GrpcPreconditions.CheckArgument(dateTime.Kind == DateTimeKind.Utc, "dateTime needs of kind DateTimeKind.Utc or be equal to DateTime.MaxValue or DateTime.MinValue."); |
| |
| try |
| { |
| TimeSpan timeSpan = dateTime - UnixEpoch; |
| long ticks = timeSpan.Ticks; |
| |
| long seconds = ticks / TicksPerSecond; |
| int nanos = (int)((ticks % TicksPerSecond) * NanosPerTick); |
| if (nanos < 0) |
| { |
| // correct the result based on C# modulo semantics for negative dividend |
| seconds--; |
| nanos += (int)NanosPerSecond; |
| } |
| return new Timespec(seconds, nanos); |
| } |
| catch (ArgumentOutOfRangeException) |
| { |
| return dateTime > UnixEpoch ? Timespec.InfFuture : Timespec.InfPast; |
| } |
| } |
| |
| /// <summary> |
| /// Gets current timestamp using <c>GPRClockType.Precise</c>. |
| /// Only available internally because core needs to be compiled with |
| /// GRPC_TIMERS_RDTSC support for this to use RDTSC. |
| /// </summary> |
| internal static Timespec PreciseNow |
| { |
| get |
| { |
| return Native.gprsharp_now(ClockType.Precise); |
| } |
| } |
| |
| // for tests only |
| internal static int NativeSize |
| { |
| get |
| { |
| return Native.gprsharp_sizeof_timespec(); |
| } |
| } |
| |
| // for tests only |
| internal static Timespec NativeInfFuture |
| { |
| get |
| { |
| return Native.gprsharp_inf_future(ClockType.Realtime); |
| } |
| } |
| |
| // for tests only |
| public static Timespec NativeInfPast |
| { |
| get |
| { |
| return Native.gprsharp_inf_past(ClockType.Realtime); |
| } |
| } |
| } |
| } |