qrandom.cpp File Reference

(95d6b801810acfaf932d4f862eff8c693af7baf1)

#include "qrandom.h"
#include "qrandom_p.h"
#include <qendian.h>
#include <qmutex.h>
#include <qobjectdefs.h>
#include <QtCore/qtcoreglobal.h>
#include <errno.h>
#include "qdeadlinetimer.h"
#include "qhashfunctions.h"
#include <cstdio>
#include <cstdlib>
#include <mutex>
#include <qt_windows.h>
#include <assert.h>

Include dependency graph for qrandom.cpp:

Go to the source code of this file.

Classes
struct	QRandomGenerator::SystemGenerator
struct	QRandomGenerator::SystemAndGlobalGenerators
struct	QRandomGenerator::SystemAndGlobalGenerators::ShortenedSystem
struct	QRandomGenerator::SystemAndGlobalGenerators::PRNGLocker

Macros
#define	_CRT_RAND_S
#define	Q_ASSERT(cond)
#define	Q_ASSERT_X(cond, x, msg)

Enumerations
enum	{ FillBufferNoexcept = true , FillBufferNoexcept = true }
enum	{ FillBufferNoexcept = true , FillBufferNoexcept = true }

Functions
DECLSPEC_IMPORT BOOLEAN WINAPI	SystemFunction036 (PVOID RandomBuffer, ULONG RandomBufferLength)
static void	fallback_update_seed (unsigned valuevalue)
static Q_NEVER_INLINE void	fallback_fill (quint32 *ptr, qsizetype leftleft) noexcept
bool	operator== (const QRandomGenerator &rng1, const QRandomGenerator &rng2)
template<typename Generator, typename FillBufferType, typename T>
static qsizetype	callFillBuffer (FillBufferType ff, T *vv)
QRandomGenerator::InitialRandomData	qt_initial_random_value ()

Variables
static Q_CONSTINIT QBasicAtomicInteger< unsigned >	seed = Q_BASIC_ATOMIC_INITIALIZER(0U)
static Q_CONSTINIT std::once_flag	fallbackFillWarningFlag

Macro Definition Documentation

_CRT_RAND_S

#define _CRT_RAND_S

Definition at line 7 of file qrandom.cpp.

Q_ASSERT

#define Q_ASSERT

(

cond

)

Value:

assert(cond)

Definition at line 52 of file qrandom.cpp.

Q_ASSERT_X

#define Q_ASSERT_X	(		cond,
			x,
			msg )

Value:

assert(cond && msg)

Definition at line 53 of file qrandom.cpp.

Enumeration Type Documentation

anonymous enum [1/2]

anonymous enum

Enumerator
FillBufferNoexcept
FillBufferNoexcept

Definition at line 61 of file qrandom.cpp.

anonymous enum [2/2]

anonymous enum

Enumerator
FillBufferNoexcept
FillBufferNoexcept

Definition at line 61 of file qrandom.cpp.

Function Documentation

callFillBuffer()

template<typename Generator, typename FillBufferType, typename T>

qsizetype callFillBuffer ( FillBufferType f, T * v )

static

Definition at line 1312 of file qrandom.cpp.

fallback_fill()

Q_NEVER_INLINE void fallback_fill ( quint32 * ptr, qsizetype left )

staticnoexcept

Definition at line 231 of file qrandom.cpp.

fallback_update_seed()

void fallback_update_seed ( unsigned value )

static

Definition at line 212 of file qrandom.cpp.

operator==()

bool operator==	(	const QRandomGenerator &	rng1,
		const QRandomGenerator &	rng2 )

Definition at line 1265 of file qrandom.cpp.

qt_initial_random_value()

QRandomGenerator::InitialRandomData qt_initial_random_value ( )

noexcept

Returns an initial random value (useful for QHash's global seed). This function attempts to use OS-provided random values to avoid initializing QRandomGenerator::system() and qsimd.cpp.

Note: on some systems, this functionn may rerturn the same value every time it is called.

Definition at line 1333 of file qrandom.cpp.

SystemFunction036()

DECLSPEC_IMPORT BOOLEAN WINAPI SystemFunction036	(	PVOID	RandomBuffer,
		ULONG	RandomBufferLength )

Variable Documentation

fallbackFillWarningFlag

Q_CONSTINIT std::once_flag fallbackFillWarningFlag

static

Definition at line 221 of file qrandom.cpp.

seed

Q_CONSTINIT QBasicAtomicInteger< unsigned > seed = Q_BASIC_ATOMIC_INITIALIZER(0U)

static

Definition at line 211 of file qrandom.cpp.