Decouple native Ruby Mysql#async_query from the C extension as per Roger's suggestion.Remove no-op c_mysql_query flag for evented tests.

ext/extconf.rb

@@ -31,6 +31,10 @@ else
   exit 1
 end
 
+if have_func('rb_thread_blocking_region') and have_macro('RB_UBF_DFL', 'ruby.h')
+  flags << "-DHAVE_TBR"
+end
+
 # make mysql constant
 File.open("conftest.c", "w") do |f|
   f.puts src

ext/mysql.c

@@ -2143,7 +2143,7 @@ void Init_mysql(void)
 #endif
     rb_define_method(cMysql, "query", query, 1);
     rb_define_method(cMysql, "real_query", query, 1);
-    rb_define_method(cMysql, "async_query", async_query, -1);
+    rb_define_method(cMysql, "c_async_query", async_query, -1);
     rb_define_method(cMysql, "send_query", send_query, 1);
     rb_define_method(cMysql, "get_result", get_result, 0);
     rb_define_method(cMysql, "readable?", readable, -1);

lib/mysqlplus.rb

@@ -2,11 +2,7 @@ require 'mysql'
 
 class Mysql
   
-  alias_method :c_async_query, :async_query
-
   def async_query(sql, timeout = nil)
-    puts "** Blocking ? #{blocking?().inspect}" if ENV['MYSQL_BLOCKING_STATUS'] == '1'
-    return c_async_query(sql, timeout) if ENV['MYSQL_C_ASYNC_QUERY'] == '1'
     send_query(sql)
     select [ (@sockets ||= {})[socket] ||= IO.new(socket) ], nil, nil, nil
     get_result

test/evented_test.rb

@@ -2,12 +2,5 @@ require File.dirname(__FILE__) + '/test_helper'
 
 EventedMysqlTest.new( 10 ) do |test|
   test.setup{ Mysql.real_connect('localhost','root') }
-  test.log_blocking_status = true
-  test.run!
-end
-
-EventedMysqlTest.new( 10 ) do |test|
-  test.setup{ Mysql.real_connect('localhost','root') }
-  test.c_async_query = true
   test.run!
 end

test/test_helper.rb

@@ -28,10 +28,8 @@ class MysqlTest
   
   def run!
     c_or_native_ruby_async_query do
-      with_blocking_status do
-        prepare
-        yield
-      end  
+      prepare
+      yield
     end  
   end
   
@@ -61,22 +59,16 @@ class MysqlTest
   
   def c_or_native_ruby_async_query
     if @c_async_query
-      ENV['MYSQL_C_ASYNC_QUERY'] = '1'
       log "** using C based async_query"
     else
-      ENV['MYSQL_C_ASYNC_QUERY'] = '0'
       log "** using native Ruby async_query"
     end
     yield
   end
   
-  def with_blocking_status
-    if @log_blocking_status
-      ENV['MYSQL_BLOCKING_STATUS'] = '1'
-    else
-      ENV['MYSQL_BLOCKING_STATUS'] = '0'
-    end
-    yield
+  def c_or_native_async_query( connection, sql, timeout = nil )
+    method = @c_async_query ? :c_async_query : :async_query
+    connection.send( method, sql, timeout )
   end
   
 end
@@ -174,7 +166,7 @@ class ThreadedMysqlTest < MysqlTest
 
           log "sending query on connection #{conn}"
 
-          @connections[conn].async_query( "select sleep(3)" ).each do |result|
+          c_or_native_async_query( @connections[conn], "select sleep(3)" ).each do |result|
             log "connection #{conn} done"
           end 
         

test/threaded_test.rb

@@ -2,7 +2,6 @@ require File.dirname(__FILE__) + '/test_helper'
 
 ThreadedMysqlTest.new( 10 ) do |test|
   test.setup{ Mysql.real_connect('localhost','root') }
-  test.log_blocking_status = true
   test.run!
 end