1 /* 2 * klibc/sysconfig.h 3 * 4 * Allows for definitions of some things which may be system-dependent 5 */ 6 7 #ifndef _KLIBC_SYSCONFIG_H 8 #define _KLIBC_SYSCONFIG_H 9 10 /* 11 * Define this to obtain memory using sbrk() instead 12 * of mmap(). This should make it friendlier on 13 * non-MMU architectures. This should become a 14 * per-architecture configurable. 15 */ 16 #define MALLOC_USING_SBRK 17 18 /* 19 * This is the minimum chunk size we will ask the kernel for using 20 * malloc(); this should be a multiple of the page size on all 21 * architectures. 22 */ 23 #define MALLOC_CHUNK_SIZE 4096 24 #define MALLOC_CHUNK_MASK (MALLOC_CHUNK_SIZE-1) 25 26 /* 27 * This is the minimum alignment for the memory returned by sbrk(). 28 * It must be a power of 2. If MALLOC_USING_SBRK is defined it should 29 * be no smaller than the size of struct arena_header in malloc.h (4 30 * pointers.) 31 */ 32 #define SBRK_ALIGNMENT 32 33 34 #endif /* _KLIBC_SYSCONFIG_H */ 35