ext/socket/init.c (rsock_accept): handle ENOMEM

accept(2) documents ENOMEM as a possible error, handle it
consistent with all of our other FD-allocating wrappers.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52727 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Tue Nov 24 07:56:54 2015  Eric Wong  <e@80x24.org>
+
+	* ext/socket/init.c (rsock_accept): handle ENOMEM
+
 Tue Nov 24 07:50:15 2015  Eric Wong  <e@80x24.org>
 
 	* dir.c (dir_initialize): use rb_gc_for_fd for ENOMEM

ext/socket/init.c

@@ -605,6 +605,7 @@ rsock_s_accept(VALUE klass, int fd, struct sockaddr *sockaddr, socklen_t *len)
 	switch (errno) {
 	  case EMFILE:
 	  case ENFILE:
+	  case ENOMEM:
 	    if (retry) break;
 	    rb_gc();
 	    retry = 1;