Core/Random.cc File Reference

#include <cassert>
#include <cmath>
#include <cstring>
#include <fcntl.h>
#include <limits>
#include <mutex>
#include <pthread.h>
#include <sys/stat.h>
#include <unistd.h>
#include "Core/Debug.h"
#include "Core/Random.h"

Go to the source code of this file.

Classes
class	LogCabin::Core::Random::anonymous_namespace{Random.cc}::RandomState
	Keeps state needed by the random number generator, protected by a mutex. More...
Namespaces
namespace	LogCabin
namespace	LogCabin::Core
namespace	LogCabin::Core::Random
	Thread-safe pseudo-random number generator.
namespace	LogCabin::Core::Random::anonymous_namespace{Random.cc}
Functions
void	LogCabin::Core::Random::acquireMutex ()
	Called before fork() to grab the mutex used in pthread_atfork.
void	LogCabin::Core::Random::releaseMutex ()
	Called in the parent post fork().
void	LogCabin::Core::Random::anonymous_namespace{Random.cc}::resetRandomState ()
	Called in child after fork() to reset random seed.
template<typename T >
T	LogCabin::Core::Random::anonymous_namespace{Random.cc}::getRandomBytes ()
	Fill a variable of type T with some random bytes.
double	LogCabin::Core::Random::anonymous_namespace{Random.cc}::randomUnit ()
	Return a random number between 0 and 1.
uint8_t	LogCabin::Core::Random::random8 ()
	Return one random byte.
uint16_t	LogCabin::Core::Random::random16 ()
	Return two random bytes.
uint32_t	LogCabin::Core::Random::random32 ()
	Return four random bytes.
uint64_t	LogCabin::Core::Random::random64 ()
	Return eight random bytes.
double	LogCabin::Core::Random::randomRangeDouble (double start, double end)
	Return a random floating point number between start and end, inclusive.
uint64_t	LogCabin::Core::Random::randomRange (uint64_t start, uint64_t end)
	Return a random integer between start and end, inclusive.
Variables
class LogCabin::Core::Random::anonymous_namespace{Random.cc}::RandomState	LogCabin::Core::Random::anonymous_namespace{Random.cc}::randomState