* io.c (io_read_nonblock): support non-blocking reads without raising

  exceptions. As in: `io.read_nonblock(size, exception: false)`
  [ruby-core:38666] [Feature #5138]
* ext/openssl/ossl_ssl.c (ossl_ssl_read_internal): ditto
* ext/stringio/stringio.c (strio_sysread): ditto
* io.c (rb_io_write_nonblock): support non-blocking writes without
  raising an exception.
* ext/openssl/ossl_ssl.c (ossl_ssl_write_internal): ditto
* test/openssl/test_pair.rb (class OpenSSL): tests
* test/ruby/test_io.rb (class TestIO): ditto
* test/socket/test_nonblock.rb (class TestSocketNonblock): ditto
* test/stringio/test_stringio.rb (class TestStringIO): ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42695 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 4 deletions

diff --git a/ext/openssl/lib/openssl/buffering.rb b/ext/openssl/lib/openssl/buffering.rb
index 51bc968e3a..e40dfee667 100644
--- a/ext/openssl/lib/openssl/buffering.rb
+++ b/ext/openssl/lib/openssl/buffering.rb
@@ -161,7 +161,7 @@ module OpenSSL::Buffering
   # when the peer requests a new TLS/SSL handshake.  See openssl the FAQ for
   # more details.  http://www.openssl.org/support/faq.html
 
-  def read_nonblock(maxlen, buf=nil)
+  def read_nonblock(maxlen, buf=nil, exception: true)
     if maxlen == 0
       if buf
         buf.clear
@@ -171,7 +171,7 @@ module OpenSSL::Buffering
       end
     end
     if @rbuffer.empty?
-      return sysread_nonblock(maxlen, buf)
+      return sysread_nonblock(maxlen, buf, exception: exception)
     end
     ret = consume_rbuff(maxlen)
     if buf
@@ -370,9 +370,9 @@ module OpenSSL::Buffering
   # is when the peer requests a new TLS/SSL handshake.  See the openssl FAQ
   # for more details.  http://www.openssl.org/support/faq.html
 
-  def write_nonblock(s)
+  def write_nonblock(s, exception: true)
     flush
-    syswrite_nonblock(s)
+    syswrite_nonblock(s, exception: exception)
   end
 
   ##