mapping.h

   1 #include <sys/mman.h>
   2
   3 #include <errno.h>
   4 #include <unistd.h>
   5
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8 #include <fcntl.h>
   9
  10 void *Map(const char *path, size_t *size, bool ro) {
  11     int fd;
  12     _syscall(fd = open(path, ro ? O_RDONLY : O_RDWR));
  13
  14     struct stat stat;
  15     _syscall(fstat(fd, &stat));
  16
  17     if (size != NULL)
  18         *size = stat.st_size;
  19
  20     void *base;
  21     _syscall(base = mmap(0, stat.st_size, ro ? PROT_READ : PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0));
  22
  23     _syscall(close(fd));
  24     return base;
  25 }