Implemented shared memory as an NPObject.

o3d/gpu_plugin/system_services/shared_memory_unittest.cc

+// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/process_util.h"
+#include "o3d/gpu_plugin/np_utils/np_browser_stub.h"
+#include "o3d/gpu_plugin/system_services/shared_memory.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+using testing::_;
+using testing::DoAll;
+using testing::Return;
+using testing::SetArgumentPointee;
+using testing::StrictMock;
+
+namespace o3d {
+namespace gpu_plugin {
+
+class SharedMemoryTest : public testing::Test {
+ protected:
+  virtual void SetUp() {
+    shared_memory_ = NPCreateObject<SharedMemory>(NULL);
+  }
+
+  StubNPBrowser stub_browser_;
+  NPObjectPointer<SharedMemory> shared_memory_;
+};
+
+TEST_F(SharedMemoryTest, MemoryIsNotMappedBeforeInitialization) {
+  EXPECT_TRUE(NULL == shared_memory_->handle);
+  EXPECT_TRUE(NULL == shared_memory_->ptr);
+  EXPECT_EQ(0, shared_memory_->size);
+  EXPECT_EQ(0, shared_memory_->GetSize());
+}
+
+TEST_F(SharedMemoryTest, InitializesAndReturnsMappedMemory) {
+  EXPECT_TRUE(shared_memory_->Initialize(65536));
+  EXPECT_TRUE(NULL != shared_memory_->handle);
+  EXPECT_TRUE(NULL == shared_memory_->ptr);
+  EXPECT_EQ(65536, shared_memory_->size);
+  EXPECT_EQ(65536, shared_memory_->GetSize());
+
+  EXPECT_TRUE(shared_memory_->Map());
+  ASSERT_TRUE(NULL != shared_memory_->ptr);
+  EXPECT_EQ(65536, shared_memory_->size);
+
+  // Test that memory can be written to.
+  int8* ptr = static_cast<int8*>(shared_memory_->ptr);
+  for (int i = 0; i < 65536; ++i) {
+    ptr[i] = 7;
+  }
+}
+
+TEST_F(SharedMemoryTest, MapFailsBeforeInitialization) {
+  EXPECT_FALSE(shared_memory_->Map());
+}
+
+TEST_F(SharedMemoryTest, InitializeFailsForNegativeSize) {
+  EXPECT_FALSE(shared_memory_->Initialize(-1));
+}
+
+TEST_F(SharedMemoryTest, SecondCallToInitializeFails) {
+  EXPECT_TRUE(shared_memory_->Initialize(65536));
+  EXPECT_FALSE(shared_memory_->Initialize(65536));
+}
+
+TEST_F(SharedMemoryTest, InitializeRoundsUpToPageSizeButReportsRequestedSize) {
+  EXPECT_TRUE(shared_memory_->Initialize(7));
+
+  EXPECT_TRUE(shared_memory_->Map());
+  EXPECT_EQ(7, shared_memory_->size);
+
+  // Test that memory can be written to.
+  int8* ptr = static_cast<int8*>(shared_memory_->ptr);
+  for (int i = 0; i < 7; ++i) {
+    ptr[i] = 7;
+  }
+}
+
+TEST_F(SharedMemoryTest, SecondMapDoesNothing) {
+  EXPECT_TRUE(shared_memory_->Initialize(65536));
+
+  EXPECT_TRUE(shared_memory_->Map());
+  ASSERT_TRUE(NULL != shared_memory_->handle);
+  ASSERT_TRUE(NULL != shared_memory_->ptr);
+  EXPECT_EQ(65536, shared_memory_->size);
+
+  void* handle = shared_memory_->handle;
+  void* ptr = shared_memory_->ptr;
+  EXPECT_TRUE(shared_memory_->Map());
+  ASSERT_EQ(ptr, shared_memory_->ptr);
+  EXPECT_EQ(65536, shared_memory_->size);
+}
+
+TEST_F(SharedMemoryTest, CanInitializeWithHandle) {
+  base::SharedMemory* temp_shared_memory = new base::SharedMemory;
+  EXPECT_TRUE(temp_shared_memory->Create(std::wstring(), false, false, 65536));
+
+  shared_memory_->Initialize(temp_shared_memory, 65536);
+  EXPECT_TRUE(NULL != shared_memory_->handle);
+  EXPECT_TRUE(NULL == shared_memory_->ptr);
+  EXPECT_EQ(65536, shared_memory_->size);
+
+  EXPECT_TRUE(shared_memory_->Map());
+  EXPECT_TRUE(NULL != shared_memory_->handle);
+  EXPECT_TRUE(NULL != shared_memory_->ptr);
+  EXPECT_EQ(65536, shared_memory_->size);
+}
+
+}  // namespace gpu_plugin
+}  // namespace o3d