From 9be37ca7d51513658f5f84d98fa5e46026cc5a04 Mon Sep 17 00:00:00 2001
From: kosaki <kosaki@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 4 May 2011 00:59:57 +0000
Subject: * thread.c (rb_wait_for_single_fd): new. * thread.c (select_single):
 select(2) based backend for rb_wait_for_single_fd().

* io.c (make_writeconv): use rb_wait_for_single_fd() instaed of
  rb_thread_fd_select().
* io.c (rb_io_wait_readable): ditto.
* thread.c (rb_thread_wait_fd_rw): ditto.

* io.c (wait_readable): removed.
* thread.c (init_set_fd): new helper function.
* include/ruby/io.h (RB_WAITFD_IN, RB_WAITFD_PRI, RB_WAITFD_OUT):
  new constant for rb_single_wait_fd().

The patch was written by Eric Wong. [Ruby 1.9 - Feature #4531]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31419 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 io.c | 42 ++----------------------------------------
 1 file changed, 2 insertions(+), 40 deletions(-)

(limited to 'io.c')

diff --git a/io.c b/io.c
index 1278e7fa5b..425ef8083a 100644
--- a/io.c
+++ b/io.c
@@ -685,21 +685,9 @@ io_fflush(rb_io_t *fptr)
     return 0;
 }
 
-#ifdef HAVE_RB_FD_INIT
-static VALUE
-wait_readable(VALUE p)
-{
-    rb_fdset_t *rfds = (rb_fdset_t *)p;
-
-    return rb_thread_fd_select(rb_fd_max(rfds), rfds, NULL, NULL, NULL);
-}
-#endif
-
 int
 rb_io_wait_readable(int f)
 {
-    rb_fdset_t rfds;
-
     if (f < 0) {
 	rb_raise(rb_eIOError, "closed stream");
     }
@@ -715,14 +703,7 @@ rb_io_wait_readable(int f)
 #if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
       case EWOULDBLOCK:
 #endif
-	rb_fd_init(&rfds);
-	rb_fd_set(f, &rfds);
-#ifdef HAVE_RB_FD_INIT
-	rb_ensure(wait_readable, (VALUE)&rfds,
-		  (VALUE (*)(VALUE))rb_fd_term, (VALUE)&rfds);
-#else
-	rb_thread_fd_select(f + 1, &rfds, NULL, NULL, NULL);
-#endif
+	rb_wait_for_single_fd(f, RB_WAITFD_IN, NULL);
 	return TRUE;
 
       default:
@@ -730,21 +711,9 @@ rb_io_wait_readable(int f)
     }
 }
 
-#ifdef HAVE_RB_FD_INIT
-static VALUE
-wait_writable(VALUE p)
-{
-    rb_fdset_t *wfds = (rb_fdset_t *)p;
-
-    return rb_thread_fd_select(rb_fd_max(wfds), NULL, wfds, NULL, NULL);
-}
-#endif
-
 int
 rb_io_wait_writable(int f)
 {
-    rb_fdset_t wfds;
-
     if (f < 0) {
 	rb_raise(rb_eIOError, "closed stream");
     }
@@ -760,14 +729,7 @@ rb_io_wait_writable(int f)
 #if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
       case EWOULDBLOCK:
 #endif
-	rb_fd_init(&wfds);
-	rb_fd_set(f, &wfds);
-#ifdef HAVE_RB_FD_INIT
-	rb_ensure(wait_writable, (VALUE)&wfds,
-		  (VALUE (*)(VALUE))rb_fd_term, (VALUE)&wfds);
-#else
-	rb_thread_fd_select(f + 1, NULL, &wfds, NULL, NULL);
-#endif
+	rb_wait_for_single_fd(f, RB_WAITFD_OUT, NULL);
 	return TRUE;
 
       default:
-- 
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