1 #include "test_builder.h"
3 #include "flatbuffers/stl_emulation.h"
4 #include "monster_test_generated.h"
6 using namespace MyGame::Example;
8 const std::string m1_name = "Cyberdemon";
9 const Color m1_color = Color_Red;
10 const std::string m2_name = "Imp";
11 const Color m2_color = Color_Green;
13 struct OwnedAllocator : public flatbuffers::DefaultAllocator {};
15 class TestHeapBuilder : public flatbuffers::FlatBufferBuilder {
18 #if !defined(FLATBUFFERS_CPP98_STL)
19 TestHeapBuilder(const TestHeapBuilder &);
20 TestHeapBuilder &operator=(const TestHeapBuilder &);
21 #endif // !defined(FLATBUFFERS_CPP98_STL)
26 : flatbuffers::FlatBufferBuilder(2048, new OwnedAllocator(), true) {}
29 #if !defined(FLATBUFFERS_CPP98_STL)
31 TestHeapBuilder(TestHeapBuilder &&other)
32 : FlatBufferBuilder(std::move(other)) {}
34 TestHeapBuilder &operator=(TestHeapBuilder &&other) {
35 FlatBufferBuilder::operator=(std::move(other));
39 #endif // !defined(FLATBUFFERS_CPP98_STL)
43 // This class simulates flatbuffers::grpc::detail::SliceAllocatorMember
44 struct AllocatorMember {
45 flatbuffers::DefaultAllocator member_allocator_;
48 struct GrpcLikeMessageBuilder : private AllocatorMember,
49 public flatbuffers::FlatBufferBuilder {
51 GrpcLikeMessageBuilder(const GrpcLikeMessageBuilder &);
52 GrpcLikeMessageBuilder &operator=(const GrpcLikeMessageBuilder &);
55 GrpcLikeMessageBuilder()
56 : flatbuffers::FlatBufferBuilder(1024, &member_allocator_, false) {}
58 GrpcLikeMessageBuilder(GrpcLikeMessageBuilder &&other)
59 : FlatBufferBuilder(1024, &member_allocator_, false) {
60 // Default construct and swap idiom.
65 #if !defined(FLATBUFFERS_CPP98_STL)
67 GrpcLikeMessageBuilder &operator=(GrpcLikeMessageBuilder &&other) {
68 // Construct temporary and swap idiom
69 GrpcLikeMessageBuilder temp(std::move(other));
74 #endif // !defined(FLATBUFFERS_CPP98_STL)
77 void Swap(GrpcLikeMessageBuilder &other) {
78 // No need to swap member_allocator_ because it's stateless.
79 FlatBufferBuilder::Swap(other);
80 // After swapping the FlatBufferBuilder, we swap back the allocator, which
81 // restores the original allocator back in place. This is necessary because
82 // MessageBuilder's allocator is its own member (SliceAllocatorMember). The
83 // allocator passed to FlatBufferBuilder::vector_downward must point to this
85 buf_.swap_allocator(other.buf_);
89 flatbuffers::Offset<Monster> populate1(
90 flatbuffers::FlatBufferBuilder &builder) {
91 auto name_offset = builder.CreateString(m1_name);
92 return CreateMonster(builder, nullptr, 0, 0, name_offset, 0, m1_color);
95 flatbuffers::Offset<Monster> populate2(
96 flatbuffers::FlatBufferBuilder &builder) {
97 auto name_offset = builder.CreateString(m2_name);
98 return CreateMonster(builder, nullptr, 0, 0, name_offset, 0, m2_color);
101 uint8_t *release_raw_base(flatbuffers::FlatBufferBuilder &fbb, size_t &size,
103 return fbb.ReleaseRaw(size, offset);
106 void free_raw(flatbuffers::grpc::MessageBuilder &, uint8_t *) {
107 // release_raw_base calls FlatBufferBuilder::ReleaseRaw on the argument
108 // MessageBuilder. It's semantically wrong as MessageBuilder has its own
109 // ReleaseRaw member function that takes three arguments. In such cases
110 // though, ~MessageBuilder() invokes ~SliceAllocator() that takes care of
111 // deleting memory as it calls grpc_slice_unref. Obviously, this behavior is
112 // very surprising as the pointer returned by FlatBufferBuilder::ReleaseRaw is
113 // not valid as soon as MessageBuilder goes out of scope. This problem does
114 // not occur with FlatBufferBuilder.
117 void free_raw(flatbuffers::FlatBufferBuilder &, uint8_t *buf) {
118 flatbuffers::DefaultAllocator().deallocate(buf, 0);
121 bool verify(const flatbuffers::DetachedBuffer &buf,
122 const std::string &expected_name, Color color) {
123 const Monster *monster = flatbuffers::GetRoot<Monster>(buf.data());
124 return (monster->name()->str() == expected_name) &&
125 (monster->color() == color);
128 bool verify(const uint8_t *buf, size_t offset, const std::string &expected_name,
130 const Monster *monster = flatbuffers::GetRoot<Monster>(buf + offset);
131 return (monster->name()->str() == expected_name) &&
132 (monster->color() == color);
135 bool release_n_verify(flatbuffers::FlatBufferBuilder &fbb,
136 const std::string &expected_name, Color color) {
137 flatbuffers::DetachedBuffer buf = fbb.Release();
138 return verify(buf, expected_name, color);
141 void FlatBufferBuilderTest() {
142 using flatbuffers::FlatBufferBuilder;
144 BuilderTests<FlatBufferBuilder>::all_tests();
145 BuilderTests<TestHeapBuilder>::all_tests();
146 BuilderTests<GrpcLikeMessageBuilder>::all_tests();
148 BuilderReuseTestSelector tests[4] = {
149 REUSABLE_AFTER_RELEASE, REUSABLE_AFTER_RELEASE_RAW,
150 REUSABLE_AFTER_RELEASE_AND_MOVE_ASSIGN,
151 REUSABLE_AFTER_RELEASE_RAW_AND_MOVE_ASSIGN
154 BuilderReuseTests<FlatBufferBuilder, FlatBufferBuilder>::run_tests(
155 TestSelector(tests, tests + 4));
156 BuilderReuseTests<TestHeapBuilder, TestHeapBuilder>::run_tests(
157 TestSelector(tests, tests + 4));
158 BuilderReuseTests<GrpcLikeMessageBuilder, GrpcLikeMessageBuilder>::run_tests(
159 TestSelector(tests, tests + 4));