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authorMiles Bader <miles@gnu.org>1996-03-05 00:07:01 +0000
committerMiles Bader <miles@gnu.org>1996-03-05 00:07:01 +0000
commite9ef1cf37a4d067c730b1df5c7a3fed3fdf06044 (patch)
treed74299851113ea49e8b10f94db303a19d7188abc /sysdeps
parentbba51ac77a00f156da6d02f59d03f708522280bc (diff)
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(__select): Don't increment GOT only because READ/WRITE/EXCEPTFDS is 0! Don't return without frobbing the bitmasks after a timeout. When clearing the bitmasks, only loop from FIRSTFD to LASTFD.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/mach/hurd/select.c36
1 files changed, 15 insertions, 21 deletions
diff --git a/sysdeps/mach/hurd/select.c b/sysdeps/mach/hurd/select.c
index 58818a7..001a28b 100644
--- a/sysdeps/mach/hurd/select.c
+++ b/sysdeps/mach/hurd/select.c
@@ -244,13 +244,13 @@ DEFUN(__select, (nfds, readfds, writefds, exceptfds, timeout),
}
}
- if (err == MACH_RCV_TIMED_OUT)
- /* This is the normal value for ERR. We might have timed out and
- read no messages. Otherwise, after receiving the first message,
- we poll for more messages. We receive with a timeout of 0 to
- effect a poll, so ERR is MACH_RCV_TIMED_OUT when the poll finds no
- message waiting. */
- err = 0;
+ if (err == MACH_RCV_TIMED_OUT)
+ /* This is the normal value for ERR. We might have timed out and
+ read no messages. Otherwise, after receiving the first message,
+ we poll for more messages. We receive with a timeout of 0 to
+ effect a poll, so ERR is MACH_RCV_TIMED_OUT when the poll finds no
+ message waiting. */
+ err = 0;
if (got && err == EINTR)
/* Some calls were interrupted, but at least one descriptor
@@ -266,12 +266,6 @@ DEFUN(__select, (nfds, readfds, writefds, exceptfds, timeout),
but the descriptor may have changed to a different server. */
__mach_port_destroy (__mach_task_self (), port);
- if (timeout && got == 0 && err == MACH_RCV_TIMED_OUT)
- /* No io_select call returned success immediately, and the last call
- blocked for our full timeout period and then timed out. So the
- multiplex times out too. */
- return 0;
-
if (err)
return __hurd_fail (err);
@@ -281,25 +275,25 @@ DEFUN(__select, (nfds, readfds, writefds, exceptfds, timeout),
/* Set the user bitarrays. We only ever have to clear bits, as all desired
ones are initially set. */
- for (i = 0; i < nfds; ++i)
+ for (i = firstfd; i < lastfd; ++i)
{
int type = types[i];
if ((type & SELECT_RETURNED) == 0)
type = 0;
- if (readfds != NULL && (type & SELECT_READ) == 0)
- FD_CLR (i, readfds);
- else
+ if (type & SELECT_READ)
got++;
- if (writefds != NULL && (type & SELECT_WRITE) == 0)
- FD_CLR (i, writefds);
else
+ FD_CLR (i, readfds);
+ if (type & SELECT_WRITE)
got++;
- if (exceptfds != NULL && (type & SELECT_URG) == 0)
- FD_CLR (i, exceptfds);
else
+ FD_CLR (i, writefds);
+ if (type & SELECT_URG)
got++;
+ else
+ FD_CLR (i, exceptfds);
}
return got;