// Automatically generate unique RNG seeds. // The CRandom class uses an unsigned 64-bit value for the seed. // This routine automatically generates two unique seeds. One is used for // the TxnInput generator RNG, and the other is for the TxnMixGenerator RNG. // The 64 bits are used as follows. // // Bits 0 - 31 Caller provided unique unsigned 32-bit id. // Bit 32 0 for TxnInputGenerator, 1 for TxnMixGenerator // Bits 33 - 43 Number of days since the base time. The base time // is set to be January 1 of the most recent year that is // a multiple of 5. This allows enough space for the last // field, and it makes the algorithm "timeless" by resetting // the generated values every 5 years. // Bits 44 - 63 Current time of day measured in 1/10's of a second. // void CMEE::AutoSetRNGSeeds( UINT32 UniqueId ) { CDateTime Now; INT32 BaseYear; INT32 Tmp1, Tmp2; Now.GetYMD( &BaseYear, &Tmp1, &Tmp2 ); // Set the base year to be the most recent year that was a multiple of 5. BaseYear -= ( BaseYear % 5 ); CDateTime Base( BaseYear, 1, 1 ); // January 1st in the BaseYear // Initialize the seed with the current time of day measured in 1/10's of a second. // This will use up to 20 bits. RNGSEED Seed; Seed = Now.MSec() / 100; // Now add in the number of days since the base time. // The number of days in the 5 year period requires 11 bits. // So shift up by that much to make room in the "lower" bits. Seed <<= 11; Seed += (RNGSEED)((INT64)Now.DayNo() - (INT64)Base.DayNo()); // So far, we've used up 31 bits. // Save the "last" bit of the "upper" 32 for the RNG id. // In addition, make room for the caller's 32-bit unique id. // So shift a total of 33 bits. Seed <<= 33; // Now the "upper" 32-bits have been set with a value for RNG 0. // Add in the sponsor's unique id for the "lower" 32-bits. Seed += UniqueId; // Set the Ticker Tape RNG to the unique seed. m_TickerTape.SetRNGSeed( Seed ); m_DriverMEESettings.cur.TickerTapeRNGSeed = Seed; // Set the RNG Id to 1 for the Trading Floor. Seed |= UINT64_CONST(0x0000000100000000); m_TradingFloor.SetRNGSeed( Seed ); m_DriverMEESettings.cur.TradingFloorRNGSeed = Seed; }
// Automatically generate unique RNG seeds. // The CRandom class uses an unsigned 64-bit value for the seed. // This routine automatically generates two unique seeds. One is used for // the TxnInput generator RNG, and the other is for the TxnMixGenerator RNG. // The 64 bits are used as follows. // // Bits 0 - 31 Caller provided unique unsigned 32-bit id. // Bit 32 0 // Bits 33 - 43 Number of days since the base time. The base time // is set to be January 1 of the most recent year that is // a multiple of 5. This allows enough space for the last // field, and it makes the algorithm "timeless" by resetting // the generated values every 5 years. // Bits 44 - 63 Current time of day measured in 1/10's of a second. // void CDM::AutoSetRNGSeeds( UINT32 UniqueId ) { CDateTime Now; INT32 BaseYear; INT32 Tmp1, Tmp2; Now.GetYMD( &BaseYear, &Tmp1, &Tmp2 ); // Set the base year to be the most recent year that was a multiple of 5. BaseYear -= ( BaseYear % 5 ); CDateTime Base( BaseYear, 1, 1 ); // January 1st in the BaseYear // Initialize the seed with the current time of day measured in 1/10's of a second. // This will use up to 20 bits. RNGSEED Seed; Seed = Now.MSec() / 100; // Now add in the number of days since the base time. // The number of days in the 5 year period requires 11 bits. // So shift up by that much to make room in the "lower" bits. Seed <<= 11; Seed += Now.DayNo() - Base.DayNo(); // So far, we've used up 31 bits. // Save the "last" bit of the "upper" 32 for the RNG id. In // this case, it is always 0 since we don't have a second // RNG in this class. // In addition, make room for the caller's 32-bit unique id. // So shift a total of 33 bits. Seed <<= 33; // Now the "upper" 32-bits have been set with a value for RNG 0. // Add in the sponsor's unique id for the "lower" 32-bits. Seed += UniqueId; // Set the RNG to the unique seed. m_rnd.SetSeed( Seed ); m_DriverDMSettings.cur.RNGSeed = Seed; }