You could copy the C code from your systems library that implements rand/srand, and use XS to create functions rand2/srand2, and have either your known sequences or your random sequence generated using rand2/srand2.

Or perhaps your system has srand48_r and drand48_r. Write some XS to interface with that, and you'll have access to the state that's being kept. So you can have several sequences (known and random).

In reply to Re: Legacy code uses "srand()" .. how to avoid losing entropy? by JavaFan
in thread Legacy code uses "srand()" .. how to avoid losing entropy? by locked_user sundialsvc4

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