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StdLib/LibC/StdLib/Malloc.c: Make the free() function conform to the ISO/IEC 9899 (C95) specification.

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The C95 specification states: "The free function causes the space pointed to by ptr to be deallocated, that is, made available for further allocation.  If ptr is a null pointer, no action occurs".  The UEFI FreePool() function, which the StdLib implementation of free() uses, does not make this check.  This fix adds a check for null to the free() function such that if the pointer argument is NULL, nothing is done.

Contributed-under: TianoCore Contribution Agreement 1.0
Reviewed-by: erik.c.bjorge@intel.com


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13739 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
darylm503 2012-09-24 22:44:03 +00:00
parent 76d6b68de8
commit 565b3c807c
1 changed files with 3 additions and 1 deletions
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4
StdLib/LibC/StdLib/Malloc.c
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@ -137,7 +137,9 @@ calloc(size_t Num, size_t Size)
void
free(void *Ptr)
{
(void) gBS->FreePool (Ptr);
if(Ptr != NULL) {
(void) gBS->FreePool (Ptr);
}
}
/** The realloc function changes the size of the object pointed to by Ptr to