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tweak last patch: add comment and avoid the first sleep

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This commit is contained in:
Sam Steingold 2007-03-11 21:08:45 +00:00
parent dc9332a69e
commit 9b73fa0b88
1 changed files with 10 additions and 7 deletions
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17
src/process.c
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@ -6495,13 +6495,16 @@ sigchld_handler (signo)
#define WUNTRACED 0
#endif /* no WUNTRACED */
/* Keep trying to get a status until we get a definitive result. */
do
{
sleep (1);
errno = 0;
pid = wait3 (&w, WNOHANG | WUNTRACED, 0);
}
while (pid < 0 && errno == EINTR);
while (1) {
errno = 0;
pid = wait3 (&w, WNOHANG | WUNTRACED, 0);
if (! (pid < 0 && errno == EINTR))
break;
/* avoid a busyloop: wait3 is a system call, so we do not want
to prevent the kernel from actually sending SIGCHLD to emacs
by asking for it all the time */
sleep (1);
}
if (pid <= 0)
{