diff options
Diffstat (limited to 'storage/perfschema/pfs_global.h')
| -rw-r--r-- | storage/perfschema/pfs_global.h | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/storage/perfschema/pfs_global.h b/storage/perfschema/pfs_global.h index f9687524cd5..f3326c5589f 100644 --- a/storage/perfschema/pfs_global.h +++ b/storage/perfschema/pfs_global.h @@ -1,4 +1,4 @@ -/* Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved. +/* Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -44,18 +44,24 @@ extern size_t pfs_allocated_memory; void *pfs_malloc(size_t size, myf flags); +/** Allocate an array of structures with overflow check. */ +void *pfs_malloc_array(size_t n, size_t size, myf flags); + /** Helper, to allocate an array of structures. - @param n number of elements in the array. - @param T type of an element. + @param n number of elements in the array + @param s size of array element + @param T type of an element @param f flags to use when allocating memory */ -#define PFS_MALLOC_ARRAY(n, T, f) \ - reinterpret_cast<T*> (pfs_malloc((n) * sizeof(T), (f))) +#define PFS_MALLOC_ARRAY(n, s, T, f) \ + reinterpret_cast<T*>(pfs_malloc_array((n), (s), (f))) /** Free memory allocated with @sa pfs_malloc. */ void pfs_free(void *ptr); +/** Detect multiplication overflow. */ +bool is_overflow(size_t product, size_t n1, size_t n2); uint pfs_get_socket_address(char *host, uint host_len, @@ -107,7 +113,7 @@ inline uint randomized_index(const void *ptr, uint max_size) value= (reinterpret_cast<intptr> (ptr)) >> 3; value*= 1789; value+= seed2 + seed1 + 1; - + result= (static_cast<uint> (value)) % max_size; seed2= seed1*seed1; |