LogCabin::Core::Random::anonymous_namespace{Random.cc}::RandomState Class Reference

Keeps state needed by the random number generator, protected by a mutex. More...

List of all members.

Public Member Functions
	RandomState ()
void	reset ()
uint64_t	random64 ()
Private Types
enum	{ STATE_BYTES }
	Size of 'statebuf'. More...
Private Attributes
std::mutex	mutex
	Protect following members from concurrent access.
bool	init
	Set to true when the constructor completes.
char	statebuf [STATE_BYTES]
	Internal scratch state used by random_r.
random_data	randbuf
	random_r's state.
Friends
void	LogCabin::Core::Random::acquireMutex ()
void	LogCabin::Core::Random::releaseMutex ()

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Detailed Description

Keeps state needed by the random number generator, protected by a mutex.

Definition at line 51 of file Random.cc.

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Member Enumeration Documentation

anonymous enum [private]

Size of 'statebuf'.

128 is the same size as initstate() uses for regular random(), see manpages for details.

Enumerator:

STATE_BYTES

Definition at line 136 of file Random.cc.

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Constructor & Destructor Documentation

LogCabin::Core::Random::anonymous_namespace{Random.cc}::RandomState::RandomState

(

)

[inline]

Definition at line 53 of file Random.cc.

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Member Function Documentation

void LogCabin::Core::Random::anonymous_namespace{Random.cc}::RandomState::reset

(

)

[inline]

Definition at line 74 of file Random.cc.

uint64_t LogCabin::Core::Random::anonymous_namespace{Random.cc}::RandomState::random64

(

)

[inline]

Definition at line 96 of file Random.cc.

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Friends And Related Function Documentation

void LogCabin::Core::Random::acquireMutex

(

)

[friend]

void LogCabin::Core::Random::releaseMutex

(

)

[friend]

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Member Data Documentation

std::mutex LogCabin::Core::Random::anonymous_namespace{Random.cc}::RandomState::mutex [private]

Protect following members from concurrent access.

Definition at line 125 of file Random.cc.

bool LogCabin::Core::Random::anonymous_namespace{Random.cc}::RandomState::init [private]

Set to true when the constructor completes.

Definition at line 130 of file Random.cc.

char LogCabin::Core::Random::anonymous_namespace{Random.cc}::RandomState::statebuf[STATE_BYTES] [private]

Internal scratch state used by random_r.

Definition at line 141 of file Random.cc.

random_data LogCabin::Core::Random::anonymous_namespace{Random.cc}::RandomState::randbuf [private]

random_r's state.

Must be handed to each call, and seems to refer to statebuf in some undocumented way.

Definition at line 147 of file Random.cc.

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The documentation for this class was generated from the following file:

• Core/Random.cc