com32/include/klibc/sysconfig.h

   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 */