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19 lines
574 B
C++
19 lines
574 B
C++
static QMutex l_rndMutex; // mutex to protect the random number generator
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void BSP::randomSeed(uint32_t seed) {
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l_rndMutex.init(N_PHILO + 1U); // <--- initialize the mutex
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l_rnd = seed;
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}
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uint32_t BSP::random(void) { // a very cheap pseudo-random-number generator
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uint32_t rnd;
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l_rndMutex.lock(); // <--- lock the shared random seed
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// "Super-Duper" Linear Congruential Generator (LCG)
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rnd = l_rnd * (3U*7U*11U*13U*23U);
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l_rnd = rnd; // set for the next time
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l_rndMutex.unlock(); // <--- unlock the shared random seed
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return rnd;
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}
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