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* exceptions.cc: (ctrl_c_handler): Do nothing while a Cygwin subprocess is

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starting.
* child_info.h (init_child_info): Remove pid argument from declaration.
* cygheap.h (init_cygheap::pid): New element.
* dcrt0.cc (dll_crt0_0): Eliminate handling of now-noexistent cygpid parameter
in child_info struct.  Set forkee to 'true' rather than cygpid since the pid
value was never used.
(dll_crt0_1): Ditto.
(_dll_crt0): Ditto.
* fork.cc (fork_child): Don't wait for sigthread.  This is handled in the fork
call now.
(fork_parent): Remove obsolete pid argument from init_child_info call.  Don't
do anything special with cygpid when DEBUGGING.
(fork): Delay all signals during fork.
(fork_init): Don't do anything special when DEBUGGING.
* pinfo.cc (set_myself): Remove pid parameter.  Use new pid field in cygheap.
(pinfo_init): Don't pass pid argument to set_myself.
* sigproc.cc (sig_send): Wait for dwProcessId to be non-zero as well as
sendsig.
(init_child_info): Eliminate handling of pid.
(wait_sig): Implement method to temporarily hold off sending signals.
* sigproc.h (__SIGHOLD): New enum.
(__SIGNOHOLD): Ditto.
* spawn.cc (spawn_guts): Remove obsolete pid argument from init_child_info
call.
This commit is contained in:
Christopher Faylor
2004-09-12 03:47:57 +00:00
parent ca5ec6685a
commit d584454c82
21 changed files with 235 additions and 216 deletions
Download Patch File Download Diff File Expand all files Collapse all files

100
winsup/cygwin/select.cc
View File

@@ -507,63 +507,63 @@ out:
if (s->write_selected)
{
if (s->write_ready)
{
select_printf ("%s, already ready for write", fh->get_name ());
gotone++;
}
{
select_printf ("%s, already ready for write", fh->get_name ());
gotone++;
}
/* Do we need to do anything about SIGTTOU here? */
else if (fh->get_device () == FH_PIPER)
select_printf ("%s, select for write on read end of pipe",
fh->get_name ());
else
{
/* We don't worry about the guard mutex, because that only applies
when from_select is false, and peek_pipe is never called that
way for writes. */
{
/* We don't worry about the guard mutex, because that only applies
when from_select is false, and peek_pipe is never called that
way for writes. */
IO_STATUS_BLOCK iosb = {0};
FILE_PIPE_LOCAL_INFORMATION fpli = {0};
IO_STATUS_BLOCK iosb = {0};
FILE_PIPE_LOCAL_INFORMATION fpli = {0};
if (NtQueryInformationFile (h,
&iosb,
&fpli,
sizeof (fpli),
FilePipeLocalInformation))
{
/* If NtQueryInformationFile fails, optimistically assume the
pipe is writable. This could happen on Win9x, because
NtQueryInformationFile is not available, or if we somehow
inherit a pipe that doesn't permit FILE_READ_ATTRIBUTES
access on the write end. */
select_printf ("%s, NtQueryInformationFile failed",
fh->get_name ());
gotone += s->write_ready = true;
}
/* Ensure that enough space is available for atomic writes,
as required by POSIX. Subsequent writes with size > PIPE_BUF
can still block, but most (all?) UNIX variants seem to work
this way (e.g., BSD, Linux, Solaris). */
else if (fpli.WriteQuotaAvailable >= PIPE_BUF)
{
select_printf ("%s, ready for write: size %lu, avail %lu",
fh->get_name (),
fpli.OutboundQuota,
fpli.WriteQuotaAvailable);
gotone += s->write_ready = 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 ("%s, tiny pipe: size %lu, avail %lu",
fh->get_name (),
fpli.OutboundQuota,
fpli.WriteQuotaAvailable);
gotone += s->write_ready = true;
}
}
if (NtQueryInformationFile (h,
&iosb,
&fpli,
sizeof (fpli),
FilePipeLocalInformation))
{
/* If NtQueryInformationFile fails, optimistically assume the
pipe is writable. This could happen on Win9x, because
NtQueryInformationFile is not available, or if we somehow
inherit a pipe that doesn't permit FILE_READ_ATTRIBUTES
access on the write end. */
select_printf ("%s, NtQueryInformationFile failed",
fh->get_name ());
gotone += s->write_ready = true;
}
/* Ensure that enough space is available for atomic writes,
as required by POSIX. Subsequent writes with size > PIPE_BUF
can still block, but most (all?) UNIX variants seem to work
this way (e.g., BSD, Linux, Solaris). */
else if (fpli.WriteQuotaAvailable >= PIPE_BUF)
{
select_printf ("%s, ready for write: size %lu, avail %lu",
fh->get_name (),
fpli.OutboundQuota,
fpli.WriteQuotaAvailable);
gotone += s->write_ready = 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 ("%s, tiny pipe: size %lu, avail %lu",
fh->get_name (),
fpli.OutboundQuota,
fpli.WriteQuotaAvailable);
gotone += s->write_ready = true;
}
}
}
return gotone;