| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef __SHARE_ALLOC_H_ |
| #define __SHARE_ALLOC_H_ |
| |
| #include <limits.h> |
| |
| // malloc(n floor 1) |
| static inline void *safe_malloc_(size_t n) |
| { |
| // dlmalloc is already safe |
| return malloc(n); |
| } |
| |
| // malloc(n1 * n2) then memset to zero |
| static inline void *safe_calloc_(size_t n1, size_t n2) |
| { |
| // dlcalloc is already safe |
| return calloc(n1, n2); |
| } |
| |
| // malloc(n1 + n2) |
| static inline void *safe_malloc_add_2op_(size_t n1, size_t n2) |
| { |
| unsigned long long n = n1 + n2; |
| size_t ns = n; |
| // check for overflow |
| return n == ns ? malloc(ns) : NULL; |
| } |
| |
| // malloc(n1 * n2) |
| static inline void *safe_malloc_mul_2op_(size_t n1, size_t n2) |
| { |
| unsigned long long n = n1 * n2; |
| size_t ns = n; |
| // check for overflow |
| return n == ns ? malloc(ns) : NULL; |
| } |
| |
| // malloc(n1 * (n2 + n3)) |
| static inline void *safe_malloc_muladd2_(size_t n1, size_t n2, size_t n3) |
| { |
| unsigned long long n = n1 * (n2 + n3); |
| size_t ns = n; |
| // check for overflow |
| return n == ns ? malloc(ns) : NULL; |
| } |
| |
| // realloc(ptr, n1 * n2) |
| static inline void *safe_realloc_mul_2op_(void *ptr, size_t n1, size_t n2) |
| { |
| unsigned long long n = n1 * n2; |
| size_t ns = n; |
| // check for overflow |
| return n == ns ? realloc(ptr, ns) : NULL; |
| } |
| |
| #endif // __SHARE_ALLOC_H_ |