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List:       cygwin-patches
Subject:    Re: [PATCH] suspend all thread on SIGSTOP
From:       Christopher Faylor <cgf () redhat ! com>
Date:       2003-10-31 21:26:56
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On Fri, Oct 31, 2003 at 10:17:37PM +0100, Thomas Pfaff wrote:
>This time with attachment.
>
>This patch suspends all threads on SIGSTOP and resumes them on SIGCONT. 
>The corresponding functions in the pthread class are already committed.
>
>Thomas
>
>2003-10-31  Thomas Pfaff  <tpfaff@gmx.net>
>
>	* exceptions.cc (sig_handle_tty_stop): Suspend all
>	threads on SIGSTOP, resume them on SIGCONT.

You can't suspend threads like this because SuspendThread can
hang in some situations, like when a thread is doing I/O.  That's why
there is a WaitForSingleObject here rather than just suspending the
thread.

It is not a perfect solution, obviously but this will just cause people
to complain about multi-threaded processes hanging after they hit CTRL-Z.

cgf
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