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corelib: Introduce Q_ALLOC_SIZE and use it on qMalloc and friends

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GCC 4.3 introduced the alloc_size attribute to hint the compiler
that allocated memory will be returned, inform the compiler which
parameter holds the size of the allocation.

Change-Id: I8734868f6bd19e201abdacd0a1b0fb80a27883c0
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Holger Hans Peter Freyther 2012-01-02 13:31:46 +01:00 committed by Qt by Nokia
parent fb7404e569
commit 16696ce493
1 changed files with 11 additions and 4 deletions
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15
src/corelib/global/qglobal.h
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@ -487,6 +487,9 @@ namespace QT_NAMESPACE {}
# define QT_NO_ARM_EABI
# endif
# endif
# if (__GNUC__ * 100 + __GNUC_MINOR__) >= 403
# define Q_ALLOC_SIZE(x) __attribute__((alloc_size(x)))
# endif
# if defined(__GXX_EXPERIMENTAL_CXX0X__)
# if (__GNUC__ * 100 + __GNUC_MINOR__) >= 403
/* C++0x features supported in GCC 4.3: */
@ -793,6 +796,10 @@ namespace QT_NAMESPACE {}
# define Q_UNLIKELY(x) (x)
#endif
#ifndef Q_ALLOC_SIZE
# define Q_ALLOC_SIZE(x)
#endif
#ifndef Q_CONSTRUCTOR_FUNCTION
# define Q_CONSTRUCTOR_FUNCTION0(AFUNC) \
namespace { \
@ -2161,11 +2168,11 @@ Q_DECLARE_TYPEINFO(long double, Q_PRIMITIVE_TYPE);
These functions make it possible to use standard C++ functions with
a similar name from Qt header files (especially template classes).
*/
Q_CORE_EXPORT void *qMalloc(size_t size);
Q_CORE_EXPORT void *qMalloc(size_t size) Q_ALLOC_SIZE(1);
Q_CORE_EXPORT void qFree(void *ptr);
Q_CORE_EXPORT void *qRealloc(void *ptr, size_t size);
Q_CORE_EXPORT void *qMallocAligned(size_t size, size_t alignment);
Q_CORE_EXPORT void *qReallocAligned(void *ptr, size_t size, size_t oldsize, size_t alignment);
Q_CORE_EXPORT void *qRealloc(void *ptr, size_t size) Q_ALLOC_SIZE(2);
Q_CORE_EXPORT void *qMallocAligned(size_t size, size_t alignment) Q_ALLOC_SIZE(1);
Q_CORE_EXPORT void *qReallocAligned(void *ptr, size_t size, size_t oldsize, size_t alignment) Q_ALLOC_SIZE(2);
Q_CORE_EXPORT void qFreeAligned(void *ptr);
Q_CORE_EXPORT void *qMemCopy(void *dest, const void *src, size_t n);
Q_CORE_EXPORT void *qMemSet(void *dest, int c, size_t n);