Ioring stream buffer enhancements

conanfile.py

@@ -69,7 +69,7 @@ def configure(self):
 
 
     def requirements(self):
-        self.requires("batteries/0.51.0", **VISIBLE)
+        self.requires("batteries/0.52.1", **VISIBLE)
         self.requires("boost/1.83.0", **VISIBLE)
         self.requires("cli11/2.3.2", **VISIBLE)
         self.requires("glog/0.6.0", **VISIBLE)

src/llfs/ioring_buffer_view.test.cpp

@@ -10,6 +10,8 @@
 //
 #include <llfs/ioring_buffer_view.hpp>
 
+#include <llfs/ioring_buffer_view.test.hpp>
+
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 
@@ -39,44 +41,7 @@ namespace {
 
 using namespace llfs::int_types;
 
-usize kTestBufferCount = 4;
-usize kTestBufferSize = 4096;
-
-class IoringBufferViewTest : public ::testing::Test
-{
- public:
-  void SetUp() override
-  {
-    this->scoped_io_ring =
-        llfs::ScopedIoRing::make_new(llfs::MaxQueueDepth{8}, llfs::ThreadPoolSize{1});
-
-    ASSERT_TRUE(this->scoped_io_ring.ok()) << BATT_INSPECT(this->scoped_io_ring.status());
-
-    this->io_ring = std::addressof(this->scoped_io_ring->get_io_ring());
-
-    this->status_or_buffer_pool = llfs::IoRingBufferPool::make_new(
-        *this->io_ring, llfs::BufferCount{kTestBufferCount}, llfs::BufferSize{kTestBufferSize});
-
-    ASSERT_TRUE(this->status_or_buffer_pool.ok())
-        << BATT_INSPECT(this->status_or_buffer_pool.status());
-
-    this->buffer_pool = this->status_or_buffer_pool->get();
-
-    this->buffer_1 = this->buffer_pool->await_allocate();
-
-    ASSERT_TRUE(this->buffer_1.ok()) << BATT_INSPECT(this->buffer_1.status());
-  }
-
-  llfs::StatusOr<llfs::ScopedIoRing> scoped_io_ring;
-
-  const llfs::IoRing* io_ring = nullptr;
-
-  llfs::StatusOr<std::unique_ptr<llfs::IoRingBufferPool>> status_or_buffer_pool;
-
-  llfs::IoRingBufferPool* buffer_pool = nullptr;
-
-  llfs::StatusOr<llfs::IoRingBufferPool::Buffer> buffer_1;
-};
+using llfs::testing::IoringBufferViewTest;
 
 //+++++++++++-+-+--+----- --- -- -  -  -   -
 //  1. Construct with empty buffer/slice.

src/llfs/ioring_buffer_view.test.hpp

@@ -0,0 +1,66 @@
+//#=##=##=#==#=#==#===#+==#+==========+==+=+=+=+=+=++=+++=+++++=-++++=-+++++++++++
+//
+// Part of the LLFS Project, under Apache License v2.0.
+// See https://www.apache.org/licenses/LICENSE-2.0 for license information.
+// SPDX short identifier: Apache-2.0
+//
+//+++++++++++-+-+--+----- --- -- -  -  -   -
+
+#pragma once
+#ifndef LLFS_IORING_BUFFER_VIEW_TEST_HPP
+#define LLFS_IORING_BUFFER_VIEW_TEST_HPP
+
+#include <llfs/config.hpp>
+//
+#include <llfs/int_types.hpp>
+#include <llfs/ioring_buffer_view.hpp>
+
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+
+namespace llfs {
+namespace testing {
+
+class IoringBufferViewTest : public ::testing::Test
+{
+ public:
+  static constexpr usize kTestBufferCount = 4;
+  static constexpr usize kTestBufferSize = 4096;
+
+  void SetUp() override
+  {
+    this->scoped_io_ring =
+        llfs::ScopedIoRing::make_new(llfs::MaxQueueDepth{8}, llfs::ThreadPoolSize{1});
+
+    ASSERT_TRUE(this->scoped_io_ring.ok()) << BATT_INSPECT(this->scoped_io_ring.status());
+
+    this->io_ring = std::addressof(this->scoped_io_ring->get_io_ring());
+
+    this->status_or_buffer_pool = llfs::IoRingBufferPool::make_new(
+        *this->io_ring, llfs::BufferCount{kTestBufferCount}, llfs::BufferSize{kTestBufferSize});
+
+    ASSERT_TRUE(this->status_or_buffer_pool.ok())
+        << BATT_INSPECT(this->status_or_buffer_pool.status());
+
+    this->buffer_pool = this->status_or_buffer_pool->get();
+
+    this->buffer_1 = this->buffer_pool->await_allocate();
+
+    ASSERT_TRUE(this->buffer_1.ok()) << BATT_INSPECT(this->buffer_1.status());
+  }
+
+  llfs::StatusOr<llfs::ScopedIoRing> scoped_io_ring;
+
+  const llfs::IoRing* io_ring = nullptr;
+
+  llfs::StatusOr<std::unique_ptr<llfs::IoRingBufferPool>> status_or_buffer_pool;
+
+  llfs::IoRingBufferPool* buffer_pool = nullptr;
+
+  llfs::StatusOr<llfs::IoRingBufferPool::Buffer> buffer_1;
+};
+
+}  //namespace testing
+}  //namespace llfs
+
+#endif  // LLFS_IORING_BUFFER_VIEW_TEST_HPP

src/llfs/ioring_stream_buffer.cpp

@@ -253,6 +253,7 @@ void IoRingStreamBuffer::Fragment::push(Fragment&& fragment)
   for (BufferView& part : fragment.views_) {
     this->push(std::move(part));
   }
+  fragment.views_.clear();
 }
 
 //==#==========+==+=+=++=+++++++++++-+-+--+----- --- -- -  -  -   -

src/llfs/ioring_stream_buffer.test.cpp

@@ -10,6 +10,7 @@
 //
 #include <llfs/ioring_stream_buffer.hpp>
 
+#include <llfs/ioring_buffer_view.test.hpp>
 #include <llfs/ioring_stream_buffer.test.hpp>
 
 #include <gmock/gmock.h>
@@ -22,6 +23,7 @@ namespace {
 
 using namespace llfs::int_types;
 
+using llfs::testing::IoringBufferViewTest;
 using llfs::testing::IoringStreamBufferClosedEmptyTest;
 using llfs::testing::IoringStreamBufferEmptyTest;
 using llfs::testing::IoringStreamBufferFullTest;
@@ -396,4 +398,59 @@ TEST_F(IoringStreamBufferFullTest, PrepareWaitOk2)
   EXPECT_TRUE(view.ok()) << BATT_INSPECT(view.ok());
 }
 
+//==#==========+==+=+=++=+++++++++++-+-+--+----- --- -- -  -  -   -
+//
+TEST_F(IoringBufferViewTest, FragmentSeqTest)
+{
+  const std::string_view kTestDataPrefix = "hello, world";
+
+  std::memset(this->buffer_1->data(), 'a', this->buffer_1->size());
+  std::memcpy(this->buffer_1->data(), kTestDataPrefix.data(), kTestDataPrefix.size());
+
+  const auto verify_data_in_fragment = [this](const llfs::IoRingStreamBuffer::Fragment& f) {
+    std::variant<llfs::IoRingBufferPool::Buffer, std::unique_ptr<u8[]>> storage;
+
+    batt::ConstBuffer cb = f.gather(storage);
+
+    ASSERT_EQ(cb.size(), this->buffer_1->size());
+    ASSERT_EQ(std::memcmp(cb.data(), this->buffer_1->data(), cb.size()), 0);
+  };
+
+  // Build Fragment f1 using a single buffer view.
+  //
+  llfs::IoRingConstBufferView view1{
+      *this->buffer_1,
+      this->buffer_1->get(),
+  };
+
+  llfs::IoRingStreamBuffer::Fragment f1;
+  f1.push(std::move(view1));
+
+  ASSERT_NO_FATAL_FAILURE(verify_data_in_fragment(f1));
+
+  // Now create Fragment f2 by copying views from f1.
+  //
+  llfs::IoRingStreamBuffer::Fragment f2;
+
+  f1.as_seq() | batt::seq::for_each([&f2](const llfs::IoRingConstBufferView& view) {
+    f2.push(batt::make_copy(view));
+  });
+
+  EXPECT_EQ(f1.byte_size(), f2.byte_size());
+  ASSERT_NO_FATAL_FAILURE(verify_data_in_fragment(f2));
+
+  // Use push overloads.
+  //
+  llfs::IoRingStreamBuffer::Fragment f3;
+  f3.push(f2);
+  EXPECT_EQ(f1.byte_size(), f3.byte_size());
+  ASSERT_NO_FATAL_FAILURE(verify_data_in_fragment(f3));
+
+  llfs::IoRingStreamBuffer::Fragment f4;
+  f4.push(std::move(f1));
+  EXPECT_EQ(f2.byte_size(), f4.byte_size());
+  EXPECT_TRUE(f1.empty());
+  ASSERT_NO_FATAL_FAILURE(verify_data_in_fragment(f4));
+}
+
 }  // namespace