BSONObj JSSrand( const BSONObj &a, void* data ) {
uassert( 12518, "srand requires a single numeric argument",
a.nFields() == 1 && a.firstElement().isNumber() );
#if !defined(_WIN32)
_randomSeed.set( static_cast< unsigned int >( a.firstElement().numberLong() ) ); // grab least significant digits
#else
srand( static_cast< unsigned int >( a.firstElement().numberLong() ) );
#endif
return undefinedReturn;
}
BSONObj JSSrand(const BSONObj& a, void* data) {
unsigned int seed;
// grab the least significant bits of either the supplied argument or
// a random number from SecureRandom.
if (a.nFields() == 1 && a.firstElement().isNumber())
seed = static_cast<unsigned int>(a.firstElement().numberLong());
else {
std::unique_ptr<SecureRandom> rand(SecureRandom::create());
seed = static_cast<unsigned int>(rand->nextInt64());
}
#if !defined(_WIN32)
_randomSeed.set(seed);
#else
srand(seed);
#endif
return BSON("" << static_cast<double>(seed));
}
StackChecker() {
checker.set(this);
}