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ice-9/poll: verify sizeof(struct pollfd)

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* libguile/poll.c (scm_init_poll): Define %sizeof-struct-pollfd.
* module/ice-9/poll.scm: Check %sizeof-struct-pollfd.
This commit is contained in:
Andy Wingo 2011-12-04 22:45:03 +01:00
parent 8500b18696
commit 6d346bb61a
2 changed files with 4 additions and 0 deletions
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1
libguile/poll.c
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@ -184,6 +184,7 @@ scm_init_poll (void)
{
#if HAVE_POLL
scm_c_define_gsubr ("primitive-poll", 4, 0, 0, scm_primitive_poll);
scm_c_define ("%sizeof-struct-pollfd", scm_from_size_t (sizeof (struct pollfd)));
#else
scm_misc_error ("%init-poll", "`poll' unavailable on this platform", SCM_EOL);
#endif

3
module/ice-9/poll.scm
View file

@ -38,6 +38,9 @@
(load-extension (string-append "libguile-" (effective-version))
"scm_init_poll"))
(if (not (= %sizeof-struct-pollfd 8))
(error "Unexpected struct pollfd size" %sizeof-struct-pollfd))
(if (defined? 'POLLIN)
(export POLLIN))