Rainer Orth <[email protected]> writes:
> Ian Lance Taylor <[email protected]> writes:
>
>> Thanks. I'm going to try gambling that every uses the type "long" for
>> the fds_bits array. If so, I think this patch will work. Bootstrapped
>> and ran Go testsuite on x86_64-unknown-linux-gnu (forcing the use of
>> select). Committed to mainline.
>
> I fear you lost ;-)
>
> * On Solaris, it's always long (i.e. either 32 or 64-bit).
>
> * On IRIX 6.5, it's long for 32-bit and int for 64-bit (i.e. always
> 32-bit), while 64-bit long is 64-bit.
>
> * On Tru64 UNIX V5.1, it's always int (i.e. 32-bit), while long is
> 64-bit.
>
> This has to be system-dependent, I fear.
Bother.
OK, for my next attempt I committed the appended patch, in which
mksysinfo tries to guess the right type to use. Let me know where this
fails. Bootstrapped and ran Go testsuite on x86_64-unknown-linux-gnu.
Committed to mainline.
Ian
diff -r fa0bb5137d66 libgo/configure.ac
--- a/libgo/configure.ac Thu Mar 31 22:09:27 2011 -0700
+++ b/libgo/configure.ac Fri Apr 01 15:47:05 2011 -0700
@@ -417,7 +417,7 @@
;;
esac
-AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h)
+AC_CHECK_HEADERS(sys/mman.h syscall.h sys/epoll.h sys/ptrace.h sys/syscall.h sys/user.h sys/utsname.h sys/select.h)
AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
AC_CHECK_FUNCS(srandom random strerror_r strsignal wait4)
diff -r fa0bb5137d66 libgo/mksysinfo.sh
--- a/libgo/mksysinfo.sh Thu Mar 31 22:09:27 2011 -0700
+++ b/libgo/mksysinfo.sh Fri Apr 01 15:47:05 2011 -0700
@@ -73,6 +73,9 @@
#if defined(HAVE_SYS_UTSNAME_H)
#include <sys/utsname.h>
#endif
+#if defined(HAVE_SYS_SELECT_H)
+#include <sys/select.h>
+#endif
#include <unistd.h>
EOF
@@ -438,4 +441,12 @@
-e 's/_in_addr/[4]byte/g' \
>> ${OUT}
+# Try to guess the type to use for fd_set.
+fd_set=`grep '^type _fd_set ' gen-sysinfo.go || true`
+fds_bits_type="_C_long"
+if test "$fd_set" != ""; then
+ fds_bits_type=`echo $fd_set | sed -e 's/.*[]]\([^;]*\); }$/\1/'`
+fi
+echo "type fds_bits_type $fds_bits_type" >> ${OUT}
+
exit $?
diff -r fa0bb5137d66 libgo/syscalls/sysfile_posix.go
--- a/libgo/syscalls/sysfile_posix.go Thu Mar 31 22:09:27 2011 -0700
+++ b/libgo/syscalls/sysfile_posix.go Fri Apr 01 15:47:05 2011 -0700
@@ -181,10 +181,10 @@
return;
}
-const nfdbits = unsafe.Sizeof(_C_long) * 8
+const nfdbits = unsafe.Sizeof(fds_bits_type) * 8
type FdSet_t struct {
- Fds_bits [(FD_SETSIZE + nfdbits - 1) / nfdbits]_C_long
+ Fds_bits [(FD_SETSIZE + nfdbits - 1) / nfdbits]fds_bits_type
}
func FDSet(fd int, set *FdSet_t) {
