none/tests/mmap_o_direct.c

   1 #include <unistd.h>
   2 #define __USE_GNU
   3 #include <fcntl.h>
   4 #include <sys/mman.h>
   5 #include <stddef.h>
   6 #if !defined(O_DIRECT)
   7 #define O_DIRECT 0
   8 #endif
   9
  10 int main(void)
  11 {
  12    int fd = open("mmap_o_direct.c", O_RDONLY | O_DIRECT);
  13    if (-1 != fd)
  14    {
  15       void* m = mmap(NULL, 307, PROT_READ, MAP_PRIVATE, fd, 0);
  16       munmap(m, 307);
  17       close(fd);
  18    }
  19 }