/home/roberto/qt5_coco/qtsdk/qtbase/src/corelib/global/qmalloc.cpp

global/qmalloc.cpp

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38 ** $QT_END_LICENSE$ -

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40 ****************************************************************************/ -

41 -

42 #include "qplatformdefs.h" -

43 -

44 #include <stdlib.h> -

45 -

46 /* -

47 Define the container allocation functions in a separate file, so that our -

48 users can easily override them. -

49 */ -

50 -

51 QT_BEGIN_NAMESPACE -

52 -

53 #if !QT_DEPRECATED_SINCE(5, 0) -

54 // Make sure they're defined to be exported -

55 Q_CORE_EXPORT void *qMalloc(size_t size) Q_ALLOC_SIZE(1); -

56 Q_CORE_EXPORT void qFree(void *ptr); -

57 Q_CORE_EXPORT void *qRealloc(void *ptr, size_t size) Q_ALLOC_SIZE(2); -

58 #endif -

59 -

60 -

61 void *qMalloc(size_t size) -

62 { -

return ::malloc(size);

never executed: return ::malloc(size);

64 } -

65 -

66 void qFree(void *ptr) -

67 { -

::free(ptr);

never executed (the execution status of this line is deduced): ::free(ptr);

}

never executed: }

70 -

71 void *qRealloc(void *ptr, size_t size) -

72 { -

return ::realloc(ptr, size);

never executed: return ::realloc(ptr, size);

74 } -

75 -

76 void *qMallocAligned(size_t size, size_t alignment) -

77 { -

return qReallocAligned(0, size, 0, alignment);

executed: return qReallocAligned(0, size, 0, alignment);

Execution Count:1440

1440

79 } -

80 -

81 void *qReallocAligned(void *oldptr, size_t newsize, size_t oldsize, size_t alignment) -

82 { -

83 // fake an aligned allocation -

Q_UNUSED(oldsize);

executed (the execution status of this line is deduced): (void)oldsize;;

85 -

void *actualptr = oldptr ? static_cast<void **>(oldptr)[-1] : 0;

partially evaluated: oldptr

TRUE	FALSE
no Evaluation Count:0	yes Evaluation Count:1440

0-1440

if (alignment <= sizeof(void*)) {

evaluated: alignment <= sizeof(void*)

TRUE	FALSE
yes Evaluation Count:239	yes Evaluation Count:1201

239-1201

88 // special, fast case -

void **newptr = static_cast<void **>(realloc(actualptr, newsize + sizeof(void*)));

executed (the execution status of this line is deduced): void **newptr = static_cast<void **>(realloc(actualptr, newsize + sizeof(void*)));

if (!newptr)

partially evaluated: !newptr

TRUE	FALSE
no Evaluation Count:0	yes Evaluation Count:239

0-239

return 0;

never executed: return 0;

if (newptr == actualptr) {

partially evaluated: newptr == actualptr

TRUE	FALSE
no Evaluation Count:0	yes Evaluation Count:239

0-239

93 // realloc succeeded without reallocating -

return oldptr;

never executed: return oldptr;

95 } -

96 -

*newptr = newptr;

executed (the execution status of this line is deduced): *newptr = newptr;

return newptr + 1;

executed: return newptr + 1;

Execution Count:239

239

99 } -

100 -

101 // malloc returns pointers aligned at least at sizeof(size_t) boundaries -

102 // but usually more (8- or 16-byte boundaries). -

103 // So we overallocate by alignment-sizeof(size_t) bytes, so we're guaranteed to find a -

104 // somewhere within the first alignment-sizeof(size_t) that is properly aligned. -

105 -

106 // However, we need to store the actual pointer, so we need to allocate actually size + -

107 // alignment anyway. -

108 -

109

void *real = realloc(actualptr, newsize + alignment);

executed (the execution status of this line is deduced): void *real = realloc(actualptr, newsize + alignment);

110

if (!real)

partially evaluated: !real

TRUE	FALSE
no Evaluation Count:0	yes Evaluation Count:1201

0-1201

111

return 0;

never executed: return 0;

112 -

113

quintptr faked = reinterpret_cast<quintptr>(real) + alignment;

executed (the execution status of this line is deduced): quintptr faked = reinterpret_cast<quintptr>(real) + alignment;

114

faked &= ~(alignment - 1);

executed (the execution status of this line is deduced): faked &= ~(alignment - 1);

115 -

116

void **faked_ptr = reinterpret_cast<void **>(faked);

executed (the execution status of this line is deduced): void **faked_ptr = reinterpret_cast<void **>(faked);

117 -

118 // now save the value of the real pointer at faked-sizeof(void*) -

119 // by construction, alignment > sizeof(void*) and is a power of 2, so -

120 // faked-sizeof(void*) is properly aligned for a pointer -

121

faked_ptr[-1] = real;

executed (the execution status of this line is deduced): faked_ptr[-1] = real;

122 -

123

return faked_ptr;

executed: return faked_ptr;

Execution Count:1201

1201

124 } -

125 -

126 void qFreeAligned(void *ptr) -

127 { -

128

if (!ptr)

evaluated: !ptr

TRUE	FALSE
yes Evaluation Count:2	yes Evaluation Count:1437

2-1437

129

return;

executed: return;

Execution Count:2

130

void **ptr2 = static_cast<void **>(ptr);

executed (the execution status of this line is deduced): void **ptr2 = static_cast<void **>(ptr);

131

free(ptr2[-1]);

executed (the execution status of this line is deduced): free(ptr2[-1]);

132

}

executed: }

Execution Count:1437

1437

133 -

134 QT_END_NAMESPACE -

135 -

136 -

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