File 0008-io-move-poll-defines-to-internal-io.h.patch of Package ruby2.5

From e34392ad2821dbbc64dc79a66a78091b97b07d69 Mon Sep 17 00:00:00 2001
From: Michal Suchanek <msuchanek@suse.de>
Date: Wed, 5 Feb 2020 22:31:42 +0100
Subject: [PATCH 08/19] io: move poll defines to internal/io.h

USE_POLL is defined in io.c and thread.c with different semantic. Move
to internal/io.h and adjust the #ifdef to #if.

Also move POLL*_SETs. Define POLLERR_SET on Linux as well. This
genereates a little more code in rb_wait_for_single_fd compated to teh
case when it was defined to 0 but should not impact result. We need
POLLERR_SET defined for checking errors.

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
---
 internal.h | 21 +++++++++++++++++++++
 thread.c   | 17 +----------------
 2 files changed, 22 insertions(+), 16 deletions(-)

diff --git a/internal.h b/internal.h
index 2e2fa7ba75c0..21bc37ba7ac4 100644
--- a/internal.h
+++ b/internal.h
@@ -79,6 +79,27 @@ extern "C" {
 # define __has_extension __has_feature
 #endif
 
+/* non-Linux poll may not work on all FDs */
+#if defined(HAVE_POLL)
+# if defined(__linux__)
+#   define USE_POLL 1
+# endif
+# if defined(__FreeBSD_version) && __FreeBSD_version >= 1100000
+#  define USE_POLL 1
+# endif
+#endif
+
+#ifndef USE_POLL
+# define USE_POLL 0
+#endif
+
+#if USE_POLL
+#define POLLIN_SET (POLLRDNORM | POLLRDBAND | POLLIN)
+#define POLLOUT_SET (POLLWRBAND | POLLWRNORM | POLLOUT)
+#define POLLEX_SET (POLLPRI)
+#define POLLERR_SET (POLLHUP | POLLERR)
+#endif
+
 #if GCC_VERSION_SINCE(4, 6, 0) || __has_extension(c_static_assert)
 # define STATIC_ASSERT(name, expr) _Static_assert(expr, #name ": " #expr)
 #else
diff --git a/thread.c b/thread.c
index 0cf48e38c61d..afbddc563cd0 100644
--- a/thread.c
+++ b/thread.c
@@ -3890,22 +3890,7 @@ rb_thread_fd_select(int max, rb_fdset_t * read, rb_fdset_t * write, rb_fdset_t *
     return do_select(max, read, write, except, timeout);
 }
 
-/*
- * poll() is supported by many OSes, but so far Linux is the only
- * one we know of that supports using poll() in all places select()
- * would work.
- */
-#if defined(HAVE_POLL) && defined(__linux__)
-#  define USE_POLL
-#endif
-
-#ifdef USE_POLL
-
-/* The same with linux kernel. TODO: make platform independent definition. */
-#define POLLIN_SET (POLLRDNORM | POLLRDBAND | POLLIN | POLLHUP | POLLERR)
-#define POLLOUT_SET (POLLWRBAND | POLLWRNORM | POLLOUT | POLLERR)
-#define POLLEX_SET (POLLPRI)
-
+#if USE_POLL
 #ifndef HAVE_PPOLL
 /* TODO: don't ignore sigmask */
 int
-- 
2.26.2