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thread.c: suppress warnings

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* thread.c (do_select): suppress maybe-uninitialized warnings on
  maxfd.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51774 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2015-09-06 02:04:40 +00:00
parent 649016bdb1
commit f476726323
1 changed files with 17 additions and 12 deletions
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29
thread.c
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@ -3392,6 +3392,8 @@ rb_fd_select(int n, rb_fdset_t *readfds, rb_fdset_t *writefds, rb_fdset_t *excep
return select(n, r, w, e, timeout);
}
#define rb_fd_no_init(fds) ASSUME(!(fds)->maxfd)
#undef FD_ZERO
#undef FD_SET
#undef FD_CLR
@ -3457,6 +3459,10 @@ rb_fd_set(int fd, rb_fdset_t *set)
#endif
#ifndef rb_fd_no_init
#define rb_fd_no_init(fds) (void)(fds)
#endif
static inline int
retryable(int e)
{
@ -3510,12 +3516,12 @@ do_select(int n, rb_fdset_t *readfds, rb_fdset_t *writefds,
timeout = &wait_rest;
}
if (readfds)
rb_fd_init_copy(&orig_read, readfds);
if (writefds)
rb_fd_init_copy(&orig_write, writefds);
if (exceptfds)
rb_fd_init_copy(&orig_except, exceptfds);
#define fd_init_copy(f) \
(f##fds) ? rb_fd_init_copy(&orig_##f, f##fds) : rb_fd_no_init(&orig_##f)
fd_init_copy(read);
fd_init_copy(write);
fd_init_copy(except);
#undef fd_init_copy
do {
lerrno = 0;
@ -3529,12 +3535,11 @@ do_select(int n, rb_fdset_t *readfds, rb_fdset_t *writefds,
RUBY_VM_CHECK_INTS_BLOCKING(th);
} while (result < 0 && retryable(errno = lerrno) && do_select_update());
if (readfds)
rb_fd_term(&orig_read);
if (writefds)
rb_fd_term(&orig_write);
if (exceptfds)
rb_fd_term(&orig_except);
#define fd_term(f) if (f##fds) rb_fd_term(&orig_##f)
fd_term(read);
fd_term(write);
fd_term(except);
#undef fd_term
return result;
}