#define IH_CONDSYNC(H) ih_condsync(H)
#ifdef HAVE_PIO
+#ifdef AFS_NT40_ENV
+#define OS_PREAD(FD, B, S, O) nt_pread(FD, B, S, O)
+#define OS_PWRITE(FD, B, S, O) nt_pwrite(FD, B, S, O)
+#else
#ifdef O_LARGEFILE
#define OS_PREAD(FD, B, S, O) pread64(FD, B, S, O)
#define OS_PWRITE(FD, B, S, O) pwrite64(FD, B, S, O)
#define OS_PREAD(FD, B, S, O) pread(FD, B, S, O)
#define OS_PWRITE(FD, B, S, O) pwrite(FD, B, S, O)
#endif /* !O_LARGEFILE */
+#endif /* AFS_NT40_ENV */
#else /* !HAVE_PIO */
extern ssize_t ih_pread(int fd, void * buf, size_t count, afs_foff_t offset);
extern ssize_t ih_pwrite(int fd, const void * buf, size_t count, afs_foff_t offset);