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39
40#ifndef QRANDOM_P_H
41#define QRANDOM_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include "qglobal_p.h"
55#include <private/qsimd_p.h>
56
57QT_BEGIN_NAMESPACE
58
59enum QRandomGeneratorControl {
60 UseSystemRNG = 1,
61 SkipSystemRNG = 2,
62 SkipHWRNG = 4,
63 SetRandomData = 8,
64
65 // 28 bits
66 RandomDataMask = 0xfffffff0
67};
68
69enum RNGType {
70 SystemRNG = 0,
71 MersenneTwister = 1
72};
73
74#if defined(QT_BUILD_INTERNAL) && defined(QT_BUILD_CORE_LIB)
75Q_CORE_EXPORT QBasicAtomicInteger<uint> qt_randomdevice_control = Q_BASIC_ATOMIC_INITIALIZER(0U);
76#elif defined(QT_BUILD_INTERNAL)
77extern Q_CORE_EXPORT QBasicAtomicInteger<uint> qt_randomdevice_control;
78#else
79static const struct {
80 uint loadAcquire() const { return 0; }
81} qt_randomdevice_control;
82#endif
83
84
85
86QT_END_NAMESPACE
87
88#endif // QRANDOM_P_H
89

source code of qtbase/src/corelib/global/qrandom_p.h