LLVM_ATTRIBUTE_ALWAYS_INLINE
static const Metadata *findHashableBaseTypeImpl(const Metadata *type) {
// Check the cache first.
if (HashableConformanceEntry *entry =
HashableConformances->find(HashableConformanceKey{type})) {
return entry->baseTypeThatConformsToHashable;
}
if (!KnownToConformToHashable &&
!swift_conformsToProtocol(type, &_TMps8Hashable)) {
// Don't cache the negative response because we don't invalidate
// this cache when a new conformance is loaded dynamically.
return nullptr;
}
// By this point, `type` is known to conform to `Hashable`.
const Metadata *baseTypeThatConformsToHashable = type;
while (true) {
const Metadata *superclass =
_swift_class_getSuperclass(baseTypeThatConformsToHashable);
if (!superclass)
break;
if (!swift_conformsToProtocol(superclass, &_TMps8Hashable))
break;
baseTypeThatConformsToHashable = superclass;
}
HashableConformances->getOrInsert(HashableConformanceKey{type},
baseTypeThatConformsToHashable);
return baseTypeThatConformsToHashable;
}
void Render(double time)
{
static const Mat4f reflection(
Vec4f( 1.0, 0.0, 0.0, 0.0),
Vec4f( 0.0,-1.0, 0.0, 0.0),
Vec4f( 0.0, 0.0, 1.0, 0.0),
Vec4f( 0.0, 0.0, 0.0, 1.0)
);
auto camera = CamMatrixf::Orbiting(
Vec3f(),
GLfloat(7.0 + SineWave(time / 12.0)*2.5),
FullCircles(time / 10.0),
Degrees(45.0 - SineWave(time / 7.0)*35.0)
);
shape_prog.Use();
shape.Bind();
gl.Enable(Capability::CullFace);
gl.FrontFace(make_shape.FaceWinding());
// render into the off-screen framebuffer
fbo.Bind(Framebuffer::Target::Draw);
gl.Viewport(
(width - refl_tex_side) / 2,
(height - refl_tex_side) / 2,
refl_tex_side, refl_tex_side
);
gl.Clear().ColorBuffer().DepthBuffer();
shape_camera_matrix.Set(
camera *
ModelMatrixf::Translation(0.0f, -1.0f, 0.0f) *
reflection
);
gl.CullFace(Face::Front);
shape_instr.Draw(shape_indices);
gl.Bind(Framebuffer::Target::Draw, DefaultFramebuffer());
gl.Viewport(width, height);
gl.Clear().ColorBuffer().DepthBuffer();
shape_camera_matrix.Set(camera);
gl.CullFace(Face::Back);
shape_instr.Draw(shape_indices);
gl.Disable(Capability::CullFace);
// Render the plane
plane_prog.Use();
plane.Bind();
plane_camera_matrix.Set(camera);
plane_camera_position.Set(camera.Position());
plane_instr.Draw(plane_indices);
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
//
// set the matrix for camera orbiting the origin
camera_matrix.Set(
CamMatrixf::Orbiting(
Vec3f(),
4.5,
Degrees(time * 35),
Degrees(SineWave(time / 20.0) * 60)
)
);
// set the model matrix
model_matrix.Set(
ModelMatrixf::RotationX(FullCircles(time * 0.25))
);
gl.PolygonMode(PolygonMode::Line);
gl.CullFace(Face::Front);
torus_instr.Draw(torus_indices);
//
gl.PolygonMode(PolygonMode::Fill);
gl.CullFace(Face::Back);
torus_instr.Draw(torus_indices);
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
//
camera_matrix.Set(
CamMatrixf::Orbiting(
Vec3f(),
3.0f,
Degrees(time * 50),
Degrees(SineWave(time / 16.0) * 80)
)
);
// the model matrix
model_matrix.Set(
ModelMatrixf::RotationY(Degrees(time * 25))
);
// draw 36 instances of the cube
// first the back faces
gl.CullFace(Face::Front);
front_facing.Set(0);
cube_instr.Draw(cube_indices, inst_count);
// then the front faces
gl.CullFace(Face::Back);
front_facing.Set(1);
cube_instr.Draw(cube_indices, inst_count);
}
int main(int argc,char** argv) {
cout << "Hello Lord Firal" << endl;
int i;
// create program state
ProgramState* state = new ProgramState();
state->setRunning(true);
// read in flags
while((i=getopt(argc,argv,"tu:")) != EOF) {
switch(i) {
case 'u': {
state->setRunning(false);
break;
}
case 'l': {
// load in the parameter
break;
}
default:
break;
}
}
// process flags
// run the program
if(state->getRunning()) {
Lazy* program = new Lazy(state);
program->run();
delete program;
}
return 0;
}
void Reshape(GLuint width, GLuint height) {
gl.Viewport(width, height);
auto projection =
CamMatrixf::PerspectiveX(Degrees(70), float(width) / height, 1, 200);
sky_box_projection_matrix.Set(projection);
shape_projection_matrix.Set(projection);
}
void Reshape(GLuint width, GLuint height) {
gl.Viewport(width, height);
Mat4f projection =
CamMatrixf::PerspectiveX(Degrees(70), float(width) / height, 1, 40);
shape_projection_matrix.Set(projection);
plane_projection_matrix.Set(projection);
halo_projection_matrix.Set(projection);
}
TEST(Lazy, constUsage) {
bool lambdaCalled = false;
const Lazy<Foo> lazy([&lambdaCalled] { lambdaCalled = true; return Foo(42); });
EXPECT_FALSE(lambdaCalled);
EXPECT_FALSE(static_cast<bool>(lazy));
EXPECT_EQ(42, (*lazy).value);
EXPECT_EQ(42, lazy.value().value);
EXPECT_EQ(42, lazy->value);
EXPECT_TRUE(lambdaCalled);
EXPECT_TRUE(static_cast<bool>(lazy));
}
const Metadata *
swift::_searchConformancesByMangledTypeName(const llvm::StringRef typeName) {
auto &C = Conformances.get();
const Metadata *foundMetadata = nullptr;
pthread_mutex_lock(&C.SectionsToScanLock);
unsigned sectionIdx = 0;
unsigned endSectionIdx = C.SectionsToScan.size();
for (; sectionIdx < endSectionIdx; ++sectionIdx) {
auto §ion = C.SectionsToScan[sectionIdx];
for (const auto &record : section) {
if (auto metadata = record.getCanonicalTypeMetadata())
foundMetadata = _matchMetadataByMangledTypeName(typeName, metadata, nullptr);
else if (auto pattern = record.getGenericPattern())
foundMetadata = _matchMetadataByMangledTypeName(typeName, nullptr, pattern);
if (foundMetadata != nullptr)
break;
}
if (foundMetadata != nullptr)
break;
}
pthread_mutex_unlock(&C.SectionsToScanLock);
return foundMetadata;
}
static const TypeContextDescriptor *
_findNominalTypeDescriptor(Demangle::NodePointer node) {
const TypeContextDescriptor *foundNominal = nullptr;
auto &T = TypeMetadataRecords.get();
auto mangledName = Demangle::mangleNode(node);
// Look for an existing entry.
// Find the bucket for the metadata entry.
if (auto Value = T.NominalCache.find(mangledName))
return Value->getDescription();
// Check type metadata records
T.SectionsToScanLock.withLock([&] {
foundNominal = _searchTypeMetadataRecords(T, node);
});
// Check protocol conformances table. Note that this has no support for
// resolving generic types yet.
if (!foundNominal)
foundNominal = _searchConformancesByMangledTypeName(node);
if (foundNominal) {
T.NominalCache.getOrInsert(mangledName, foundNominal);
}
return foundNominal;
}
const Metadata *
swift::_searchConformancesByMangledTypeName(const llvm::StringRef typeName) {
auto &C = Conformances.get();
const Metadata *foundMetadata = nullptr;
ScopedLock guard(C.SectionsToScanLock);
unsigned sectionIdx = 0;
unsigned endSectionIdx = C.SectionsToScan.size();
for (; sectionIdx < endSectionIdx; ++sectionIdx) {
auto §ion = C.SectionsToScan[sectionIdx];
for (const auto &record : section) {
if (auto metadata = record.getCanonicalTypeMetadata())
foundMetadata = _matchMetadataByMangledTypeName(typeName, metadata, nullptr);
else if (auto ntd = record.getNominalTypeDescriptor())
foundMetadata = _matchMetadataByMangledTypeName(typeName, nullptr, ntd);
if (foundMetadata != nullptr)
break;
}
if (foundMetadata != nullptr)
break;
}
return foundMetadata;
}
/// Search the witness table in the ConformanceCache. \returns a pair of the
/// WitnessTable pointer and a boolean value True if a definitive value is
/// found. \returns false if the type or its superclasses were not found in
/// the cache.
static
std::pair<const WitnessTable *, bool>
searchInConformanceCache(const Metadata *type,
const ProtocolDescriptor *protocol,
ConformanceCacheEntry *&foundEntry) {
auto &C = Conformances.get();
auto origType = type;
foundEntry = nullptr;
recur_inside_cache_lock:
// See if we have a cached conformance. Try the specific type first.
{
// Check if the type-protocol entry exists in the cache entry that we found.
if (auto *Value = C.findCached(type, protocol)) {
if (Value->isSuccessful())
return std::make_pair(Value->getWitnessTable(), true);
// If we're still looking up for the original type, remember that
// we found an exact match.
if (type == origType)
foundEntry = Value;
// If we got a cached negative response, check the generation number.
if (Value->getFailureGeneration() == C.SectionsToScan.size()) {
// We found an entry with a negative value.
return std::make_pair(nullptr, true);
}
}
}
{
// For generic and resilient types, nondependent conformances
// are keyed by the nominal type descriptor rather than the
// metadata, so try that.
auto *description = type->getNominalTypeDescriptor().get();
// Hash and lookup the type-protocol pair in the cache.
if (auto *Value = C.findCached(description, protocol)) {
if (Value->isSuccessful())
return std::make_pair(Value->getWitnessTable(), true);
// We don't try to cache negative responses for generic
// patterns.
}
}
// If the type is a class, try its superclass.
if (const ClassMetadata *classType = type->getClassObject()) {
if (classHasSuperclass(classType)) {
type = swift_getObjCClassMetadata(classType->SuperClass);
goto recur_inside_cache_lock;
}
}
// We did not find an entry.
return std::make_pair(nullptr, false);
}
void Reshape(GLuint width, GLuint height)
{
gl.Viewport(width, height);
projection_matrix.Set(
CamMatrixf::PerspectiveX(
Degrees(70),
width, height,
1, 100
)
);
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
//
// set the matrix for camera orbiting the origin
camera_matrix.Set(
CamMatrixf::Orbiting(
Vec3f(),
3.5,
Degrees(time * 35),
Degrees(SineWave(time / 60.0) * 80)
)
);
// set the model matrix
model_matrix.Set(
ModelMatrixf::RotationX(FullCircles(time * 0.25))
);
torus_instr.Draw(torus_indices);
}
void Reshape(GLuint width, GLuint height)
{
gl.Viewport(width, height);
prog.Use();
projection_matrix.Set(
CamMatrixf::PerspectiveX(
Degrees(70),
double(width)/height,
1, 20
)
);
}
void Render(double time) {
const double day_duration = 67.0;
auto sun =
Vec3f(0.000, 1.000, 0.000) * 1e10 * SineWave(time / day_duration) +
Vec3f(0.000, 0.000, -1.000) * 1e10 * CosineWave(time / day_duration);
auto camera = CamMatrixf::Orbiting(
Vec3f(),
5.0,
FullCircles(-0.10 - time / 27.0),
Degrees(-20 - SineWave(time / 17.0) * 30));
auto model = ModelMatrixf::RotationA(
Vec3f(1.0, 1.0, 1.0), FullCircles(time / 13.0));
gl.Clear().ColorBuffer().DepthBuffer();
sky_box.Use();
sky_box_prog.Use();
sky_box_camera_matrix.Set(camera);
sky_box_sun_position.Set(sun);
sky_box.Draw();
shape.Use();
shape_prog.Use();
shape_model_matrix.Set(model);
shape_camera_matrix.Set(camera);
shape_camera_position.Set(camera.Position());
shape_sun_position.Set(sun);
shape.Draw();
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
auto camera = CamMatrixf::Orbiting(
Vec3f(),
8.5,
FullCircles(time / 5.0),
Degrees(15 + (-SineWave(time/10.0)+1.0)* 0.5 * 75)
);
ModelMatrixf model =
ModelMatrixf::Translation(0.0f, 2.5f, 0.0) *
ModelMatrixf::RotationA(
Vec3f(1.0f, 1.0f, 1.0f),
FullCircles(time / 7.0)
);
plane_prog.Use();
plane_camera_matrix.Set(camera);
plane.Bind();
gl.DrawArrays(PrimitiveType::TriangleStrip, 0, 4);
shape_prog.Use();
shape_camera_matrix.Set(camera);
shape_model_matrix.Set(model);
shape.Bind();
shape_instr.Draw(shape_indices);
halo_prog.Use();
halo_camera_matrix.Set(camera);
halo_model_matrix.Set(model);
gl.DepthMask(false);
gl.Enable(Capability::Blend);
shape_instr.Draw(shape_indices);
gl.Disable(Capability::Blend);
gl.DepthMask(true);
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
//
Vec3f lightPos(-1.0f, 2.0f, 2.0f);
lightPos *= (1.0f - SineWave(time/5.0f)*0.4f);
light_pos.Set(lightPos);
tex_projection_matrix.Set(
CamMatrixf::PerspectiveX(Degrees(15), 1.0, 1, 20) *
CamMatrixf::LookingAt(lightPos, Vec3f())
);
// set the model matrix
model_matrix.Set(
ModelMatrixf::RotationY(FullCircles(time * 0.1))
);
cube.Bind();
gl.CullFace(Face::Front);
cube_instr.Draw(cube_indices);
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
camera_matrix.Set(
CamMatrixf::Orbiting(
Vec3f(),
GLfloat(30.0 - SineWave(time / 17.0)*25.0),
Degrees(time * 47),
Degrees(SineWave(time / 31.0) * 90)
)
);
gl.DrawArrays(PrimitiveType::Patches, 0, 16);
}
static void _addImageTypeMetadataRecordsBlock(const uint8_t *records,
size_t recordsSize) {
assert(recordsSize % sizeof(TypeMetadataRecord) == 0
&& "weird-sized type metadata section?!");
// If we have a section, enqueue the type metadata for lookup.
auto recordsBegin
= reinterpret_cast<const TypeMetadataRecord*>(records);
auto recordsEnd
= reinterpret_cast<const TypeMetadataRecord*>
(records + recordsSize);
// type metadata cache should always be sufficiently initialized by this point.
_registerTypeMetadataRecords(TypeMetadataRecords.unsafeGetAlreadyInitialized(),
recordsBegin, recordsEnd);
}
static void _addImageProtocolConformancesBlock(const uint8_t *conformances,
size_t conformancesSize) {
assert(conformancesSize % sizeof(ProtocolConformanceRecord) == 0
&& "weird-sized conformances section?!");
// If we have a section, enqueue the conformances for lookup.
auto recordsBegin
= reinterpret_cast<const ProtocolConformanceRecord*>(conformances);
auto recordsEnd
= reinterpret_cast<const ProtocolConformanceRecord*>
(conformances + conformancesSize);
// Conformance cache should always be sufficiently initialized by this point.
_registerProtocolConformances(Conformances.unsafeGetAlreadyInitialized(),
recordsBegin, recordsEnd);
}
void swift::addImageTypeMetadataRecordBlockCallback(const void *records,
uintptr_t recordsSize) {
assert(recordsSize % sizeof(TypeMetadataRecord) == 0
&& "weird-sized type metadata section?!");
// If we have a section, enqueue the type metadata for lookup.
auto recordBytes = reinterpret_cast<const char *>(records);
auto recordsBegin
= reinterpret_cast<const TypeMetadataRecord*>(records);
auto recordsEnd
= reinterpret_cast<const TypeMetadataRecord*>(recordBytes + recordsSize);
// Type metadata cache should always be sufficiently initialized by this
// point. Attempting to go through get() may also lead to an infinite loop,
// since we register records during the initialization of
// TypeMetadataRecords.
_registerTypeMetadataRecords(TypeMetadataRecords.unsafeGetAlreadyInitialized(),
recordsBegin, recordsEnd);
}
static const TypeContextDescriptor *
_findNominalTypeDescriptor(Demangle::NodePointer node,
Demangle::Demangler &Dem) {
const TypeContextDescriptor *foundNominal = nullptr;
auto &T = TypeMetadataRecords.get();
// If we have a symbolic reference to a context, resolve it immediately.
NodePointer symbolicNode = node;
if (symbolicNode->getKind() == Node::Kind::Type)
symbolicNode = symbolicNode->getChild(0);
if (symbolicNode->getKind() == Node::Kind::SymbolicReference)
return cast<TypeContextDescriptor>(
(const ContextDescriptor *)symbolicNode->getIndex());
auto mangledName =
Demangle::mangleNode(node,
[&](const void *context) -> NodePointer {
return _buildDemanglingForContext(
(const ContextDescriptor *) context,
{}, false, Dem);
});
// Look for an existing entry.
// Find the bucket for the metadata entry.
if (auto Value = T.NominalCache.find(mangledName))
return Value->getDescription();
// Check type metadata records
foundNominal = _searchTypeMetadataRecords(T, node);
// Check protocol conformances table. Note that this has no support for
// resolving generic types yet.
if (!foundNominal)
foundNominal = _searchConformancesByMangledTypeName(node);
if (foundNominal) {
T.NominalCache.getOrInsert(mangledName, foundNominal);
}
return foundNominal;
}
static const Metadata *
_typeByMangledName(const llvm::StringRef typeName) {
const Metadata *foundMetadata = nullptr;
auto &T = TypeMetadataRecords.get();
// Look for an existing entry.
// Find the bucket for the metadata entry.
if (auto Value = T.Cache.find(typeName))
return Value->getMetadata();
// Check type metadata records
pthread_mutex_lock(&T.SectionsToScanLock);
foundMetadata = _searchTypeMetadataRecords(T, typeName);
pthread_mutex_unlock(&T.SectionsToScanLock);
// Check protocol conformances table. Note that this has no support for
// resolving generic types yet.
if (!foundMetadata)
foundMetadata = _searchConformancesByMangledTypeName(typeName);
if (foundMetadata) {
T.Cache.getOrInsert(typeName, foundMetadata);
}
#if SWIFT_OBJC_INTEROP
// Check for ObjC class
// FIXME does this have any value? any ObjC class with a Swift name
// should already be registered as a Swift type.
if (foundMetadata == nullptr) {
std::string prefixedName("_Tt" + typeName.str());
foundMetadata = reinterpret_cast<ClassMetadata *>
(objc_lookUpClass(prefixedName.c_str()));
}
#endif
return foundMetadata;
}
static BoxPair::Return _swift_allocBox_(const Metadata *type) {
// Get the heap metadata for the box.
auto &B = Boxes.get();
const void *typeArg = type;
auto entry = B.findOrAdd(&typeArg, 1, [&]() -> BoxCacheEntry* {
// Create a new entry for the box.
auto entry = BoxCacheEntry::allocate(B.getAllocator(), &typeArg, 1, 0);
auto metadata = entry->getData();
metadata->Offset = GenericBoxHeapMetadata::getHeaderOffset(type);
metadata->BoxedType = type;
return entry;
});
auto metadata = entry->getData();
// Allocate and project the box.
auto allocation = swift_allocObject(metadata, metadata->getAllocSize(),
metadata->getAllocAlignMask());
auto projection = metadata->project(allocation);
return BoxPair{allocation, projection};
}
void
swift::swift_registerTypeMetadataRecords(const TypeMetadataRecord *begin,
const TypeMetadataRecord *end) {
auto &T = TypeMetadataRecords.get();
_registerTypeMetadataRecords(T, begin, end);
}
Laziness()
: total([&]{ return first.get()+ second.get(); }, total.depends(first).depends(second))
{}
const WitnessTable *
swift::swift_conformsToProtocol(const Metadata *type,
const ProtocolDescriptor *protocol) {
auto &C = Conformances.get();
auto origType = type;
unsigned numSections = 0;
ConformanceCacheEntry *foundEntry;
recur:
// See if we have a cached conformance. The ConcurrentMap data structure
// allows us to insert and search the map concurrently without locking.
// We do lock the slow path because the SectionsToScan data structure is not
// concurrent.
auto FoundConformance = searchInConformanceCache(type, protocol, foundEntry);
// The negative answer does not always mean that there is no conformance,
// unless it is an exact match on the type. If it is not an exact match,
// it may mean that all of the superclasses do not have this conformance,
// but the actual type may still have this conformance.
if (FoundConformance.second) {
if (FoundConformance.first || foundEntry)
return FoundConformance.first;
}
// If we didn't have an up-to-date cache entry, scan the conformance records.
C.SectionsToScanLock.lock();
unsigned failedGeneration = ConformanceCacheGeneration;
// If we have no new information to pull in (and nobody else pulled in
// new information while we waited on the lock), we're done.
if (C.SectionsToScan.size() == numSections) {
if (failedGeneration != ConformanceCacheGeneration) {
// Someone else pulled in new conformances while we were waiting.
// Start over with our newly-populated cache.
C.SectionsToScanLock.unlock();
type = origType;
goto recur;
}
// Save the failure for this type-protocol pair in the cache.
C.cacheFailure(type, protocol);
C.SectionsToScanLock.unlock();
return nullptr;
}
// Update the last known number of sections to scan.
numSections = C.SectionsToScan.size();
// Scan only sections that were not scanned yet.
unsigned sectionIdx = foundEntry ? foundEntry->getFailureGeneration() : 0;
unsigned endSectionIdx = C.SectionsToScan.size();
for (; sectionIdx < endSectionIdx; ++sectionIdx) {
auto §ion = C.SectionsToScan[sectionIdx];
// Eagerly pull records for nondependent witnesses into our cache.
for (const auto &record : section) {
// If the record applies to a specific type, cache it.
if (auto metadata = record.getCanonicalTypeMetadata()) {
auto P = record.getProtocol();
// Look for an exact match.
if (protocol != P)
continue;
if (!isRelatedType(type, metadata, /*isMetadata=*/true))
continue;
// Store the type-protocol pair in the cache.
auto witness = record.getWitnessTable(metadata);
if (witness) {
C.cacheSuccess(metadata, P, witness);
} else {
C.cacheFailure(metadata, P);
}
// If the record provides a nondependent witness table for all instances
// of a generic type, cache it for the generic pattern.
// TODO: "Nondependent witness table" probably deserves its own flag.
// An accessor function might still be necessary even if the witness table
// can be shared.
} else if (record.getTypeKind()
== TypeMetadataRecordKind::UniqueNominalTypeDescriptor
&& record.getConformanceKind()
== ProtocolConformanceReferenceKind::WitnessTable) {
auto R = record.getNominalTypeDescriptor();
auto P = record.getProtocol();
// Look for an exact match.
if (protocol != P)
continue;
if (!isRelatedType(type, R, /*isMetadata=*/false))
continue;
// Store the type-protocol pair in the cache.
C.cacheSuccess(R, P, record.getStaticWitnessTable());
}
}
}
++ConformanceCacheGeneration;
C.SectionsToScanLock.unlock();
// Start over with our newly-populated cache.
type = origType;
goto recur;
}
void
swift::swift_registerProtocolConformances(const ProtocolConformanceRecord *begin,
const ProtocolConformanceRecord *end){
auto &C = Conformances.get();
_registerProtocolConformances(C, begin, end);
}
/// Search the witness table in the ConformanceCache. \returns a pair of the
/// WitnessTable pointer and a boolean value True if a definitive value is
/// found. \returns false if the type or its superclasses were not found in
/// the cache.
static
std::pair<const WitnessTable *, bool>
searchInConformanceCache(const Metadata *type,
const ProtocolDescriptor *protocol,
ConformanceCacheEntry *&foundEntry) {
auto &C = Conformances.get();
auto origType = type;
foundEntry = nullptr;
recur_inside_cache_lock:
// See if we have a cached conformance. Try the specific type first.
// Hash and lookup the type-protocol pair in the cache.
size_t hash = hashTypeProtocolPair(type, protocol);
ConcurrentList<ConformanceCacheEntry> &Bucket =
C.Cache.findOrAllocateNode(hash);
// Check if the type-protocol entry exists in the cache entry that we found.
for (auto &Entry : Bucket) {
if (!Entry.matches(type, protocol)) continue;
if (Entry.isSuccessful()) {
return std::make_pair(Entry.getWitnessTable(), true);
}
if (type == origType)
foundEntry = &Entry;
// If we got a cached negative response, check the generation number.
if (Entry.getFailureGeneration() == C.SectionsToScan.size()) {
// We found an entry with a negative value.
return std::make_pair(nullptr, true);
}
}
// If the type is generic, see if there's a shared nondependent witness table
// for its instances.
if (auto generic = type->getGenericPattern()) {
// Hash and lookup the type-protocol pair in the cache.
size_t hash = hashTypeProtocolPair(generic, protocol);
ConcurrentList<ConformanceCacheEntry> &Bucket =
C.Cache.findOrAllocateNode(hash);
for (auto &Entry : Bucket) {
if (!Entry.matches(generic, protocol)) continue;
if (Entry.isSuccessful()) {
return std::make_pair(Entry.getWitnessTable(), true);
}
// We don't try to cache negative responses for generic
// patterns.
}
}
// If the type is a class, try its superclass.
if (const ClassMetadata *classType = type->getClassObject()) {
if (classHasSuperclass(classType)) {
type = swift_getObjCClassMetadata(classType->SuperClass);
goto recur_inside_cache_lock;
}
}
// We did not find an entry.
return std::make_pair(nullptr, false);
}
