A question on sigchld_handler

[Herbert Euler]

Hello,

Here is a question on the SIGCHLD handler, `sigchld_handler' in
process.c.

Could SIGCHLD possibly be delivered more than once to Emacs, so that
`sigchld_handler' is invoked more than once?  For example, SIGCHLD
arrives first, hence `sigchld_handler' gets called.  Before it
finishes, SIGINT arrives, so `sigchld_handler' is suspended and
`interrupt_signal' gets called.  Before `interrupt_signal' finishes,
another SIGCHLD arrives and so `sigchld_handler' gets called again.
Is that possible?

Regards,
Guanpeng Xu
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