Function getRandomSeed

flow/Platform.actor.cpp:2179–2212

namespace platform {

int getRandomSeed() {
	INJECT_FAULT(platform_error, "getRandomSeed"); // getting a random seed failed
	int randomSeed;
	int retryCount = 0;

#ifdef _WIN32
	do {
		retryCount++;
		if (rand_s((unsigned int*)&randomSeed) != 0) {
			TraceEvent(SevError, "WindowsRandomSeedError").log();
			throw platform_error();
		}
	} while (randomSeed == 0 &&
	         retryCount <
	             FLOW_KNOBS->RANDOMSEED_RETRY_LIMIT); // randomSeed cannot be 0 since we use mersenne twister in
	                                                  // DeterministicRandom. Get a new one if randomSeed is 0.
#else
	int devRandom = open("/dev/urandom", O_RDONLY | O_CLOEXEC);
	do {
		retryCount++;
		if (read(devRandom, &randomSeed, sizeof(randomSeed)) != sizeof(randomSeed)) {
			TraceEvent(SevError, "OpenURandom").GetLastError();
			throw platform_error();
		}
	} while (randomSeed == 0 && retryCount < FLOW_KNOBS->RANDOMSEED_RETRY_LIMIT);
	close(devRandom);
#endif

	if (randomSeed == 0) {
		TraceEvent(SevError, "RandomSeedZeroError").log();
		throw platform_error();
	}
	return randomSeed;
}
} // namespace platform

std::string joinPath(std::string const& directory, std::string const& filename) {