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Diffstat (limited to 'innobase/include/ut0mem.h')
| -rw-r--r-- | innobase/include/ut0mem.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/innobase/include/ut0mem.h b/innobase/include/ut0mem.h index 85b99efff68..2e02b3f0b6b 100644 --- a/innobase/include/ut0mem.h +++ b/innobase/include/ut0mem.h @@ -67,6 +67,37 @@ ut_free( /*====*/ void* ptr); /* in, own: memory block */ /************************************************************************** +Implements realloc. This is needed by /pars/lexyy.c. Otherwise, you should not +use this function because the allocation functions in mem0mem.h are the +recommended ones in InnoDB. + +man realloc in Linux, 2004: + + realloc() changes the size of the memory block pointed to + by ptr to size bytes. The contents will be unchanged to + the minimum of the old and new sizes; newly allocated mem + ory will be uninitialized. If ptr is NULL, the call is + equivalent to malloc(size); if size is equal to zero, the + call is equivalent to free(ptr). Unless ptr is NULL, it + must have been returned by an earlier call to malloc(), + calloc() or realloc(). + +RETURN VALUE + realloc() returns a pointer to the newly allocated memory, + which is suitably aligned for any kind of variable and may + be different from ptr, or NULL if the request fails. If + size was equal to 0, either NULL or a pointer suitable to + be passed to free() is returned. If realloc() fails the + original block is left untouched - it is not freed or + moved. */ + +void* +ut_realloc( +/*=======*/ + /* out, own: pointer to new mem block or NULL */ + void* ptr, /* in: pointer to old block or NULL */ + ulint size); /* in: desired size */ +/************************************************************************** Frees in shutdown all allocated memory not freed yet. */ void |