random.cc

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#include "base/random.hh"
 
#include <sstream>
 
#include "base/logging.hh"
#include "sim/serialize.hh"
 
namespace gem5
{
 
Random::Random()
{
    // default random seed
    init(5489);
}
 
Random::Random(uint32_t s)
{
    init(s);
}
 
Random::~Random()
{
}
 
void
Random::init(uint32_t s)
{
    gen.seed(s);
}
 
void
Random::serialize(CheckpointOut &cp) const
{
    panic("Currently not used anywhere.\n");
 
    // get the state from the generator
    std::ostringstream oss;
    oss << gen;
    std::string state = oss.str();
    paramOut(cp, "mt_state", state);
}
 
void
Random::unserialize(CheckpointIn &cp)
{
    panic("Currently not used anywhere.\n");
 
    // the random generator state did not use to be part of the
    // checkpoint state, so be forgiving in the unserialization and
    // keep on going if the parameter is not there
    std::string state;
    if (optParamIn(cp, "mt_state", state)) {
        std::istringstream iss(state);
        iss >> gen;
    }
}
 
Random random_mt;
 
} // namespace gem5