Beispiel #1
0
        public void GeneratedUUID_ShouldHaveProperVersion(GuidGenerationMode mode)
        {
            var generator       = new TimeBasedGenerator();
            var expectedVersion = 0x10;

            var guid  = generator.GenerateGuid(mode);
            var array = guid.ToByteArray();

            Assert.Equal(expectedVersion, array[7] & 0xf0);
        }
Beispiel #2
0
        /// <summary>
        /// Generates a RFC4122 time based UUID in the give <paramref name="mode"/>.
        /// </summary>
        /// <param name="mode">Use <c>UUIDGenerationMode.FasterGeneration</c> for faster UUID generation, without synchronizing the system clock.
        /// Use <c>UUIDGenerationMode.WithUniquenessGuarantee</c> to synchronize system clock. Later approach may be slower than the former one.</param>
        /// <returns></returns>
        public Guid GenerateGuid(GuidGenerationMode mode)
        {
            if (mode == GuidGenerationMode.FasterGeneration)
            {
                var clockSequenceData = ReadClockSequenceBytes();
                return(GenerateGuid(DateTimeOffset.UtcNow, clockSequenceData, macAddressBytes));
            }

            var now = DateTimeOffset.UtcNow;

            if (now <= lastClockSyncedAt)
            {
                lock (mutex)
                {
                    if (now <= lastClockSyncedAt)
                    {
                        UpdateClockSequenceBytes();
                        lastClockSyncedAt = now;
                    }
                }
            }
            return(GenerateGuid(now, ReadClockSequenceBytes(), macAddressBytes));
        }