| // Copyright 2014 The Android Open Source Project |
| // |
| // This software is licensed under the terms of the GNU General Public |
| // License version 2, as published by the Free Software Foundation, and |
| // may be copied, distributed, and modified under those terms. |
| // |
| // This program is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| #ifndef ANDROID_BASE_MEMORY_MALLOC_USABLE_SIZE_H |
| #define ANDROID_BASE_MEMORY_MALLOC_USABLE_SIZE_H |
| |
| // Define HAVE_MALLOC_USABLE_SIZE to 1 to indicate that the current |
| // system has malloc_usable_size(). Which takes the address of a malloc-ed |
| // pointer, and return the size of the underlying storage block. |
| // This is useful to optimize heap memory usage. |
| |
| // Including at least one C library header is required to define symbols |
| // like __GLIBC__. Choose carefully because some headers like <stddef.h> |
| // are actually provided by the compiler, not the C library and do not |
| // define the macros we need. |
| #include <stdint.h> |
| |
| #if defined(__GLIBC__) |
| # include <malloc.h> |
| # define USE_MALLOC_USABLE_SIZE 1 |
| #elif defined(__APPLE__) || defined(__FreeBSD__) |
| # include <malloc/malloc.h> |
| # define malloc_usable_size malloc_size |
| # define USE_MALLOC_USABLE_SIZE 1 |
| #else |
| # define USE_MALLOC_USABLE_SIZE 0 |
| #endif |
| |
| #endif // ANDROID_BASE_MEMORY_MALLOC_USABLE_SIZE_H |
