sbrk.c

来自「标准c库代码,可以应用于各个系统提供了大量的基本函数」· C语言 代码 · 共 24 行

#include <_ansi.h>
#include <sys/types.h>
#include <sys/stat.h>



caddr_t 
  _sbrk(incr)
     int incr;
{
  extern char end;		/* Defined by the linker */
  static char *heap_end;
  char *prev_heap_end;

  if (heap_end == 0) 
    {
      heap_end = &end;
    }
  prev_heap_end = heap_end;
  heap_end += incr;
  return (caddr_t)prev_heap_end;
}