Add an unitest

paddle/fluid/operators/reader/open_files_op.cc

@@ -94,7 +94,9 @@ void MultipleReader::EndScheduler() {
   available_thread_idx_->Close();
   buffer_->Close();
   waiting_file_idx_->Close();
-  scheduler_.join();
+  if (scheduler_.joinable()) {
+    scheduler_.join();
+  }
   delete buffer_;
   delete available_thread_idx_;
   delete waiting_file_idx_;

paddle/fluid/operators/reader/reader_op_registry.cc

@@ -38,17 +38,16 @@ std::unordered_map<std::string, FileReaderCreator>& FileReaderRegistry() {
 
 std::unique_ptr<framework::ReaderBase> CreateReaderByFileName(
     const std::string& file_name, const std::vector<framework::DDim>& dims) {
-  size_t separator_pos = file_name.find(kFileFormatSeparator);
+  size_t separator_pos = file_name.find_last_of(kFileFormatSeparator);
   PADDLE_ENFORCE_NE(separator_pos, std::string::npos,
                     "File name illegal! A legal file name should be like: "
-                    "[file_format]:[file_name] (e.g., 'recordio:data_file').");
+                    "[file_name].[file_format] (e.g., 'data_file.recordio').");
-  std::string filetype = file_name.substr(0, separator_pos);
+  std::string filetype = file_name.substr(separator_pos + 1);
-  std::string f_name = file_name.substr(separator_pos + 1);
 
   auto itor = FileReaderRegistry().find(filetype);
   PADDLE_ENFORCE(itor != FileReaderRegistry().end(),
                  "No file reader registered for '%s' format.", filetype);
-  framework::ReaderBase* reader = (itor->second)(f_name, dims);
+  framework::ReaderBase* reader = (itor->second)(file_name, dims);
   return std::unique_ptr<framework::ReaderBase>(reader);
 }
 

paddle/fluid/operators/reader/reader_op_registry.h

@@ -21,7 +21,7 @@ namespace paddle {
 namespace operators {
 namespace reader {
 
-static constexpr char kFileFormatSeparator[] = ":";
+static constexpr char kFileFormatSeparator[] = ".";
 
 using FileReaderCreator = std::function<framework::ReaderBase*(
     const std::string&, const std::vector<framework::DDim>&)>;

python/paddle/fluid/layers/io.py

@@ -21,7 +21,8 @@ from ..executor import global_scope
 
 __all__ = [
     'data', 'BlockGuardServ', 'ListenAndServ', 'Send', 'open_recordio_file',
-    'read_file', 'create_shuffle_reader', 'create_double_buffer_reader'
+    'open_files', 'read_file', 'create_shuffle_reader',
+    'create_double_buffer_reader'
 ]
 
 
@@ -307,7 +308,7 @@ def open_files(filenames, thread_num, shapes, lod_levels, dtypes):
             'shape_concat': shape_concat,
             'lod_levels': lod_levels,
             'ranks': ranks,
-            'filename': filenames,
+            'file_names': filenames,
             'thread_num': thread_num
         })
 

python/paddle/fluid/tests/unittests/test_multiple_reader.py

@@ -0,0 +1,71 @@
+#   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import unittest
+
+import paddle.fluid as fluid
+import paddle.v2 as paddle
+import paddle.v2.dataset.mnist as mnist
+from shutil import copyfile
+
+
+class TestMultipleReader(unittest.TestCase):
+    def setUp(self):
+        # Convert mnist to recordio file
+        with fluid.program_guard(fluid.Program(), fluid.Program()):
+            reader = paddle.batch(mnist.train(), batch_size=32)
+            feeder = fluid.DataFeeder(
+                feed_list=[  # order is image and label
+                    fluid.layers.data(
+                        name='image', shape=[784]),
+                    fluid.layers.data(
+                        name='label', shape=[1], dtype='int64'),
+                ],
+                place=fluid.CPUPlace())
+            self.num_batch = fluid.recordio_writer.convert_reader_to_recordio_file(
+                './mnist_0.recordio', reader, feeder)
+        copyfile('./mnist_0.recordio', './mnist_1.recordio')
+        copyfile('./mnist_0.recordio', './mnist_2.recordio')
+        print(self.num_batch)
+
+    def test_multiple_reader(self, thread_num=3):
+        file_list = [
+            './mnist_0.recordio', './mnist_1.recordio', './mnist_2.recordio'
+        ]
+        with fluid.program_guard(fluid.Program(), fluid.Program()):
+            data_files = fluid.layers.open_files(
+                filenames=file_list,
+                thread_num=thread_num,
+                shapes=[(-1, 784), (-1, 1)],
+                lod_levels=[0, 0],
+                dtypes=['float32', 'int64'])
+            img, label = fluid.layers.read_file(data_files)
+
+            if fluid.core.is_compiled_with_cuda():
+                place = fluid.CUDAPlace(0)
+            else:
+                place = fluid.CPUPlace()
+
+            exe = fluid.Executor(place)
+            exe.run(fluid.default_startup_program())
+
+            batch_count = 0
+            while not data_files.eof():
+                img_val, = exe.run(fetch_list=[img])
+                batch_count += 1
+                print(batch_count)
+            # data_files.reset()
+            print("FUCK")
+
+            self.assertEqual(batch_count, self.num_batch * 3)