+++ /dev/null
-/* JNI interface to C RngStream code */
-
-/* Copyright (c) 2006-2019. The SimGrid Team.
- * All rights reserved. */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-package org.simgrid.msg;
-/**
- * Export of RngStreams for Java
- */
-public class RngStream {
- /**
- * Represents the bind between the RngStream java object and the C object.
- */
- private long bind;
- /**
- * Creates and returns a new stream without identifier.
- * This procedure reserves space to keep the information relative to
- * the RngStream, initializes its seed Ig , sets Bg and Cg equal to Ig , sets its antithetic and
- * precision switches to 0. The seed Ig is equal to the initial seed of the package given by
- * setPackageSeed if this is the first stream created, otherwise it is Z steps ahead
- * of that of the most recently created stream.
- */
- public RngStream() {
- create("");
- }
- /**
- * Creates and returns a new stream with identifier "name".
- * This procedure reserves space to keep the information relative to
- * the RngStream, initializes its seed Ig , sets Bg and Cg equal to Ig , sets its antithetic and
- * precision switches to 0. The seed Ig is equal to the initial seed of the package given by
- * setPackageSeed if this is the first stream created, otherwise it is Z steps ahead
- * of that of the most recently created stream.
- */
- public RngStream(String name) {
- create(name);
- }
- /**
- * The natively implemented method to create a C RngStream object.
- */
- private native void create(String name);
-
- /** @deprecated (from Java9 onwards) */
- @Deprecated @Override
- protected void finalize() throws Throwable{
- nativeFinalize();
- }
- /**
- * Release the C RngStream object
- */
- private native void nativeFinalize();
-
- /**
- * Sets the initial seed of the package RngStreams to the six integers in the vector seed. This will
- * be the seed (initial state) of the first stream. If this procedure is not called, the default initial
- * seed is (12345, 12345, 12345, 12345, 12345, 12345). If it is called, the first 3 values of the seed
- * must all be less than m1 = 4294967087, and not all 0; and the last 3 values must all be less
- * than m2 = 4294944443, and not all 0. Returns false for invalid seeds, and true otherwise.
- */
- public static native boolean setPackageSeed(int[] seed);
- /**
- * Reinitializes the stream g to its initial state: Cg and Bg are set to Ig .
- */
- public native void resetStart();
- /**
- * Reinitializes the stream g to the beginning of its current substream: Cg is set to Bg .
- */
- public native void restartStartSubstream();
- /**
- * Reinitializes the stream g to the beginning of its next substream: Ng is computed, and Cg and
- * Bg are set to Ng .
- */
- public native void resetNextSubstream();
- /**
- * If a = true the stream g will start generating antithetic variates, i.e., 1 - U instead of U , until
- * this method is called again with a = false.
- */
- public native void setAntithetic(boolean a);
- /**
- * Sets the initial seed Ig of stream g to the vector seed. This vector must satisfy the same
- * conditions as in setPackageSeed. The stream is then reset to this initial seed. The
- * states and seeds of the other streams are not modified. As a result, after calling this procedure,
- * the initial seeds of the streams are no longer spaced Z values apart. We discourage the use of
- * this procedure. Returns false for invalid seeds, and true otherwise.
- */
- public native boolean setSeed(int[] seed);
- /**
- * Advances the state of the stream by k values, without modifying the states of other streams (as
- * in RngStream_SetSeed), nor the values of Bg and Ig associated with this stream. If e > 0, then
- * k = 2e + c; if e < 0, then k = -2-e + c; and if e = 0, then k = c. Note: c is allowed to take
- * negative values. We discourage the use of this procedure.
- */
- public native void advanceState(int e, int g);
-
- /**
- * Returns a (pseudo)random number from the uniform distribution over the interval (0, 1), after advancing the state by one step. The returned number has 32 bits of precision
- * in the sense that it is always a multiple of 1/(232 - 208), unless RngStream_IncreasedPrecis
- * has been called for this stream.
- */
- public native double randU01();
- /**
- * Returns a (pseudo)random number from the discrete uniform distribution over the integers
- * {i, i + 1, . . . , j}
- */
- public native int randInt(int i, int j);
-
- /**
- * Class initializer, to initialize various JNI stuff
- */
- public static native void nativeInit();
- static {
- org.simgrid.NativeLib.nativeInit();
- nativeInit();
- }
-}
