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* sigproc.cc (remove_proc): Don't terminate the currently executing thread.

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This commit is contained in:
Christopher Faylor
2011-11-29 15:34:49 +00:00
parent d1fc77322f
commit 480b13a37a
9 changed files with 219 additions and 136 deletions
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79
winsup/cygwin/select.cc
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@@ -484,48 +484,51 @@ pipe_data_available (int fd, fhandler_base *fh, HANDLE h, bool writing)
FILE_PIPE_LOCAL_INFORMATION fpli = {0};
bool res = false;
if (NtQueryInformationFile (h,
&iosb,
&fpli,
sizeof (fpli),
FilePipeLocalInformation))
if (!fh->has_ongoing_io ())
{
/* If NtQueryInformationFile fails, optimistically assume the
pipe is writable. This could happen if we somehow
inherit a pipe that doesn't permit FILE_READ_ATTRIBUTES
access on the write end. */
select_printf ("fd %d, %s, NtQueryInformationFile failed",
fd, fh->get_name ());
res = writing ? true : -1;
}
else if (!writing)
{
res = !!fpli.ReadDataAvailable;
paranoid_printf ("fd %d, %s, read avail %u", fd, fh->get_name (), fpli.ReadDataAvailable);
}
else
{
/* If there is anything available in the pipe buffer then signal
that. This means that a pipe could still block since you could
be trying to write more to the pipe than is available in the
buffer but that is the hazard of select(). */
if ((fpli.WriteQuotaAvailable = (fpli.OutboundQuota - fpli.ReadDataAvailable)))
if (NtQueryInformationFile (h,
&iosb,
&fpli,
sizeof (fpli),
FilePipeLocalInformation))
{
paranoid_printf ("fd %d, %s, write: size %lu, avail %lu", fd,
fh->get_name (), fpli.OutboundQuota,
fpli.WriteQuotaAvailable);
res = true;
/* If NtQueryInformationFile fails, optimistically assume the
pipe is writable. This could happen if we somehow
inherit a pipe that doesn't permit FILE_READ_ATTRIBUTES
access on the write end. */
select_printf ("fd %d, %s, NtQueryInformationFile failed",
fd, fh->get_name ());
res = writing ? true : -1;
}
/* If we somehow inherit a tiny pipe (size < PIPE_BUF), then consider
the pipe writable only if it is completely empty, to minimize the
probability that a subsequent write will block. */
else if (fpli.OutboundQuota < PIPE_BUF &&
fpli.WriteQuotaAvailable == fpli.OutboundQuota)
else if (!writing)
{
select_printf ("fd, %s, write tiny pipe: size %lu, avail %lu",
fd, fh->get_name (), fpli.OutboundQuota,
fpli.WriteQuotaAvailable);
res = true;
res = !!fpli.ReadDataAvailable;
paranoid_printf ("fd %d, %s, read avail %u", fd, fh->get_name (), fpli.ReadDataAvailable);
}
else
{
/* If there is anything available in the pipe buffer then signal
that. This means that a pipe could still block since you could
be trying to write more to the pipe than is available in the
buffer but that is the hazard of select(). */
if ((fpli.WriteQuotaAvailable = (fpli.OutboundQuota - fpli.ReadDataAvailable)))
{
paranoid_printf ("fd %d, %s, write: size %lu, avail %lu", fd,
fh->get_name (), fpli.OutboundQuota,
fpli.WriteQuotaAvailable);
res = true;
}
/* If we somehow inherit a tiny pipe (size < PIPE_BUF), then consider
the pipe writable only if it is completely empty, to minimize the
probability that a subsequent write will block. */
else if (fpli.OutboundQuota < PIPE_BUF &&
fpli.WriteQuotaAvailable == fpli.OutboundQuota)
{
select_printf ("fd, %s, write tiny pipe: size %lu, avail %lu",
fd, fh->get_name (), fpli.OutboundQuota,
fpli.WriteQuotaAvailable);
res = true;
}
}
}
return res ?: -!!(fpli.NamedPipeState & FILE_PIPE_CLOSING_STATE);