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warning instead of error on multithreaded fork

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* libguile/posix.c (scm_fork): Issue a warning instead of an error on a
  multithreaded fork.
* doc/ref/posix.texi (Processes): Add note about multithreaded fork.
This commit is contained in:
Andy Wingo 2013-01-17 12:18:22 +01:00
parent 94027fe6ec
commit 22cdf986db
2 changed files with 21 additions and 3 deletions
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8
libguile/posix.c
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@ -1260,8 +1260,12 @@ SCM_DEFINE (scm_fork, "primitive-fork", 0, 0, 0,
async-signal-safe. We can't guarantee that in general. The best
we can do is to allow forking only very early, before any call to
sigaction spawns the signal-handling thread. */
SCM_MISC_ERROR ("attempt to fork while multiple threads are running",
SCM_EOL);
scm_display
(scm_from_latin1_string
("warning: call to primitive-fork while multiple threads are running;\n"
" further behavior unspecified. See \"Processes\" in the\n"
" manual, for more information.\n"),
scm_current_warning_port ());
pid = fork ();
if (pid == -1)
SCM_SYSERROR;