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authorSamuel Thibault <samuel.thibault@ens-lyon.org>2015-02-07 22:18:03 +0100
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2015-02-07 22:18:03 +0100
commitc187253fc222ed05de710d94b5bcaf02c3ef37c5 (patch)
tree149bbaf07278418e57f6da72e65f92d7381c6d93 /hurd
parenthurd: fix sigstate locking (diff)
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hurdselect: remove dead code.
This removes code which actually never happens, and is already taken care of in the function. This is in the second part of select, when the __mach_msg() function over the portset has returned something else than MACH_MSG_SUCCESS. I guess in the past the value returned by __mach_msg() was stored in err, so this code was necessary to set back err to 0, but now it is stored in msgerr, so err is already still 0 by default. It can thus never contain MACH_RCV_TIMED_OUT, i.e. the code is dead. The first case mentioned in the comment is already handled: on time out with no message, err is already still the default 0. On time out due to poll, err would still be 0, unless some of the io_select RPCs has returned EINTR, in which case it contains EINTR. If any other io_select RPCs had returned a proper answer, got!=0, and thus err is set to 0 just below. The code is thus indeed not useful any more.
Diffstat (limited to 'hurd')
-rw-r--r--hurd/hurdselect.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/hurd/hurdselect.c b/hurd/hurdselect.c
index bd31c94aae..1d908548e2 100644
--- a/hurd/hurdselect.c
+++ b/hurd/hurdselect.c
@@ -407,13 +407,6 @@ _hurd_select (int nfds,
}
}
- 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 (msgerr == MACH_RCV_INTERRUPTED)
/* Interruption on our side (e.g. signal reception). */
err = EINTR;