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suyu/src/core/hle/service/bcat/module.cpp

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2018-05-28 15:36:38 +02:00
// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cctype>
#include <mbedtls/md5.h>
#include "backend/boxcat.h"
#include "common/hex_util.h"
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#include "common/logging/log.h"
#include "common/string_util.h"
#include "core/file_sys/vfs.h"
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#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/readable_event.h"
#include "core/hle/kernel/writable_event.h"
#include "core/hle/service/bcat/backend/backend.h"
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#include "core/hle/service/bcat/bcat.h"
#include "core/hle/service/bcat/module.h"
#include "core/hle/service/filesystem/filesystem.h"
#include "core/settings.h"
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namespace Service::BCAT {
constexpr ResultCode ERROR_INVALID_ARGUMENT{ErrorModule::BCAT, 1};
constexpr ResultCode ERROR_FAILED_OPEN_ENTITY{ErrorModule::BCAT, 2};
constexpr ResultCode ERROR_ENTITY_ALREADY_OPEN{ErrorModule::BCAT, 6};
constexpr ResultCode ERROR_NO_OPEN_ENTITY{ErrorModule::BCAT, 7};
// The command to clear the delivery cache just calls fs IFileSystem DeleteFile on all of the files
// and if any of them have a non-zero result it just forwards that result. This is the FS error code
// for permission denied, which is the closest approximation of this scenario.
constexpr ResultCode ERROR_FAILED_CLEAR_CACHE{ErrorModule::FS, 6400};
using BCATDigest = std::array<u8, 0x10>;
struct DeliveryCacheProgressImpl {
enum class Status : u8 {
Incomplete = 0x1,
Complete = 0x9,
};
Status status = Status::Incomplete;
INSERT_PADDING_BYTES(
0x1FF); ///< TODO(DarkLordZach): RE this structure. It just seems to convey info about the
///< progress of the BCAT sync, but for us just setting completion works.
};
static_assert(sizeof(DeliveryCacheProgressImpl) == 0x200,
"DeliveryCacheProgressImpl has incorrect size.");
namespace {
u64 GetCurrentBuildID() {
const auto& id = Core::System::GetInstance().GetCurrentProcessBuildID();
u64 out{};
std::memcpy(&out, id.data(), sizeof(u64));
return out;
}
// The digest is only used to determine if a file is unique compared to others of the same name.
// Since the algorithm isn't ever checked in game, MD5 is safe.
BCATDigest DigestFile(const FileSys::VirtualFile& file) {
BCATDigest out{};
const auto bytes = file->ReadAllBytes();
mbedtls_md5(bytes.data(), bytes.size(), out.data());
return out;
}
// For a name to be valid it must be non-empty, must have a null terminating character as the final
// char, can only contain numbers, letters, underscores and a hyphen if directory and a period if
// file.
bool VerifyNameValidInternal(Kernel::HLERequestContext& ctx, std::array<char, 0x20> name,
char match_char) {
const auto null_chars = std::count(name.begin(), name.end(), 0);
const auto bad_chars = std::count_if(name.begin(), name.end(), [match_char](char c) {
return !std::isalnum(static_cast<u8>(c)) && c != '_' && c != match_char && c != '\0';
});
if (null_chars == 0x20 || null_chars == 0 || bad_chars != 0 || name[0x1F] != '\0') {
LOG_ERROR(Service_BCAT, "Name passed was invalid!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_INVALID_ARGUMENT);
return false;
}
return true;
}
bool VerifyNameValidDir(Kernel::HLERequestContext& ctx, std::array<char, 0x20> name) {
return VerifyNameValidInternal(ctx, name, '-');
}
bool VerifyNameValidFile(Kernel::HLERequestContext& ctx, std::array<char, 0x20> name) {
return VerifyNameValidInternal(ctx, name, '.');
}
} // Anonymous namespace
using DirectoryName = std::array<char, 0x20>;
using FileName = std::array<char, 0x20>;
struct DeliveryCacheDirectoryEntry {
FileName name;
u64 size;
BCATDigest digest;
};
class IDeliveryCacheProgressService final : public ServiceFramework<IDeliveryCacheProgressService> {
public:
IDeliveryCacheProgressService(Kernel::SharedPtr<Kernel::ReadableEvent> event,
const DeliveryCacheProgressImpl& impl)
: ServiceFramework{"IDeliveryCacheProgressService"}, event(std::move(event)), impl(impl) {
// clang-format off
static const FunctionInfo functions[] = {
{0, &IDeliveryCacheProgressService::GetEvent, "GetEvent"},
{1, &IDeliveryCacheProgressService::GetImpl, "GetImpl"},
};
// clang-format on
RegisterHandlers(functions);
}
private:
void GetEvent(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_BCAT, "called");
IPC::ResponseBuilder rb{ctx, 2, 1};
rb.Push(RESULT_SUCCESS);
rb.PushCopyObjects(event);
}
void GetImpl(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_BCAT, "called");
ctx.WriteBuffer(&impl, sizeof(DeliveryCacheProgressImpl));
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
}
Kernel::SharedPtr<Kernel::ReadableEvent> event;
const DeliveryCacheProgressImpl& impl;
};
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class IBcatService final : public ServiceFramework<IBcatService> {
public:
IBcatService(Backend& backend) : ServiceFramework("IBcatService"), backend(backend) {
// clang-format off
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static const FunctionInfo functions[] = {
{10100, &IBcatService::RequestSyncDeliveryCache, "RequestSyncDeliveryCache"},
{10101, &IBcatService::RequestSyncDeliveryCacheWithDirectoryName, "RequestSyncDeliveryCacheWithDirectoryName"},
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{10200, nullptr, "CancelSyncDeliveryCacheRequest"},
{20100, nullptr, "RequestSyncDeliveryCacheWithApplicationId"},
{20101, nullptr, "RequestSyncDeliveryCacheWithApplicationIdAndDirectoryName"},
{30100, nullptr, "SetPassphrase"},
{30200, nullptr, "RegisterBackgroundDeliveryTask"},
{30201, nullptr, "UnregisterBackgroundDeliveryTask"},
{30202, nullptr, "BlockDeliveryTask"},
{30203, nullptr, "UnblockDeliveryTask"},
{90100, nullptr, "EnumerateBackgroundDeliveryTask"},
{90200, nullptr, "GetDeliveryList"},
{90201, nullptr, "ClearDeliveryCacheStorage"},
{90300, nullptr, "GetPushNotificationLog"},
};
// clang-format on
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RegisterHandlers(functions);
auto& kernel{Core::System::GetInstance().Kernel()};
progress.at(static_cast<std::size_t>(SyncType::Normal)).event =
Kernel::WritableEvent::CreateEventPair(kernel, Kernel::ResetType::Sticky,
"BCAT::IDeliveryCacheProgressEvent");
progress.at(static_cast<std::size_t>(SyncType::Directory)).event =
Kernel::WritableEvent::CreateEventPair(
kernel, Kernel::ResetType::OneShot,
"BCAT::IDeliveryCacheProgressEvent::DirectoryName");
}
private:
enum class SyncType {
Normal,
Directory,
Count,
};
std::function<void(bool)> CreateCallback(SyncType type) {
return [this, type](bool success) {
auto& pair{progress.at(static_cast<std::size_t>(type))};
pair.impl.status = DeliveryCacheProgressImpl::Status::Complete;
pair.event.writable->Signal();
};
}
std::shared_ptr<IDeliveryCacheProgressService> CreateProgressService(SyncType type) {
const auto& pair{progress.at(static_cast<std::size_t>(type))};
return std::make_shared<IDeliveryCacheProgressService>(pair.event.readable, pair.impl);
}
void RequestSyncDeliveryCache(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_BCAT, "called");
backend.Synchronize({Core::CurrentProcess()->GetTitleID(), GetCurrentBuildID()},
CreateCallback(SyncType::Normal));
IPC::ResponseBuilder rb{ctx, 2, 0, 1};
rb.Push(RESULT_SUCCESS);
rb.PushIpcInterface(CreateProgressService(SyncType::Normal));
}
void RequestSyncDeliveryCacheWithDirectoryName(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
const auto name_raw = rp.PopRaw<DirectoryName>();
const auto name =
Common::StringFromFixedZeroTerminatedBuffer(name_raw.data(), name_raw.size());
LOG_DEBUG(Service_BCAT, "called, name={}", name);
backend.SynchronizeDirectory({Core::CurrentProcess()->GetTitleID(), GetCurrentBuildID()},
name, CreateCallback(SyncType::Directory));
IPC::ResponseBuilder rb{ctx, 2, 0, 1};
rb.Push(RESULT_SUCCESS);
rb.PushIpcInterface(CreateProgressService(SyncType::Directory));
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}
}
Backend& backend;
struct ProgressPair {
Kernel::EventPair event;
DeliveryCacheProgressImpl impl;
};
std::array<ProgressPair, static_cast<std::size_t>(SyncType::Count)> progress{};
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};
void Module::Interface::CreateBcatService(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_BCAT, "called");
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IPC::ResponseBuilder rb{ctx, 2, 0, 1};
rb.Push(RESULT_SUCCESS);
rb.PushIpcInterface<IBcatService>(*backend);
}
class IDeliveryCacheFileService final : public ServiceFramework<IDeliveryCacheFileService> {
public:
IDeliveryCacheFileService(FileSys::VirtualDir root_)
: ServiceFramework{"IDeliveryCacheFileService"}, root(std::move(root_)) {
// clang-format off
static const FunctionInfo functions[] = {
{0, &IDeliveryCacheFileService::Open, "Open"},
{1, &IDeliveryCacheFileService::Read, "Read"},
{2, &IDeliveryCacheFileService::GetSize, "GetSize"},
{3, &IDeliveryCacheFileService::GetDigest, "GetDigest"},
};
// clang-format on
RegisterHandlers(functions);
}
private:
void Open(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
const auto dir_name_raw = rp.PopRaw<DirectoryName>();
const auto file_name_raw = rp.PopRaw<FileName>();
const auto dir_name =
Common::StringFromFixedZeroTerminatedBuffer(dir_name_raw.data(), dir_name_raw.size());
const auto file_name =
Common::StringFromFixedZeroTerminatedBuffer(file_name_raw.data(), file_name_raw.size());
LOG_DEBUG(Service_BCAT, "called, dir_name={}, file_name={}", dir_name, file_name);
if (!VerifyNameValidDir(ctx, dir_name_raw) || !VerifyNameValidFile(ctx, file_name_raw))
return;
if (current_file != nullptr) {
LOG_ERROR(Service_BCAT, "A file has already been opened on this interface!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_ENTITY_ALREADY_OPEN);
return;
}
const auto dir = root->GetSubdirectory(dir_name);
if (dir == nullptr) {
LOG_ERROR(Service_BCAT, "The directory of name={} couldn't be opened!", dir_name);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_FAILED_OPEN_ENTITY);
return;
}
current_file = dir->GetFile(file_name);
if (current_file == nullptr) {
LOG_ERROR(Service_BCAT, "The file of name={} couldn't be opened!", file_name);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_FAILED_OPEN_ENTITY);
return;
}
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
}
void Read(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
const auto offset{rp.PopRaw<u64>()};
auto size = ctx.GetWriteBufferSize();
LOG_DEBUG(Service_BCAT, "called, offset={:016X}, size={:016X}", offset, size);
if (current_file == nullptr) {
LOG_ERROR(Service_BCAT, "There is no file currently open!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_NO_OPEN_ENTITY);
}
size = std::min(current_file->GetSize() - offset, size);
const auto buffer = current_file->ReadBytes(size, offset);
ctx.WriteBuffer(buffer);
IPC::ResponseBuilder rb{ctx, 4};
rb.Push(RESULT_SUCCESS);
rb.Push<u64>(buffer.size());
}
void GetSize(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_BCAT, "called");
if (current_file == nullptr) {
LOG_ERROR(Service_BCAT, "There is no file currently open!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_NO_OPEN_ENTITY);
}
IPC::ResponseBuilder rb{ctx, 4};
rb.Push(RESULT_SUCCESS);
rb.Push<u64>(current_file->GetSize());
}
void GetDigest(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_BCAT, "called");
if (current_file == nullptr) {
LOG_ERROR(Service_BCAT, "There is no file currently open!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_NO_OPEN_ENTITY);
}
IPC::ResponseBuilder rb{ctx, 6};
rb.Push(RESULT_SUCCESS);
rb.PushRaw(DigestFile(current_file));
}
FileSys::VirtualDir root;
FileSys::VirtualFile current_file;
};
class IDeliveryCacheDirectoryService final
: public ServiceFramework<IDeliveryCacheDirectoryService> {
public:
IDeliveryCacheDirectoryService(FileSys::VirtualDir root_)
: ServiceFramework{"IDeliveryCacheDirectoryService"}, root(std::move(root_)) {
// clang-format off
static const FunctionInfo functions[] = {
{0, &IDeliveryCacheDirectoryService::Open, "Open"},
{1, &IDeliveryCacheDirectoryService::Read, "Read"},
{2, &IDeliveryCacheDirectoryService::GetCount, "GetCount"},
};
// clang-format on
RegisterHandlers(functions);
}
private:
void Open(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
const auto name_raw = rp.PopRaw<DirectoryName>();
const auto name =
Common::StringFromFixedZeroTerminatedBuffer(name_raw.data(), name_raw.size());
LOG_DEBUG(Service_BCAT, "called, name={}", name);
if (!VerifyNameValidDir(ctx, name_raw))
return;
if (current_dir != nullptr) {
LOG_ERROR(Service_BCAT, "A file has already been opened on this interface!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_ENTITY_ALREADY_OPEN);
return;
}
current_dir = root->GetSubdirectory(name);
if (current_dir == nullptr) {
LOG_ERROR(Service_BCAT, "Failed to open the directory name={}!", name);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_FAILED_OPEN_ENTITY);
return;
}
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
}
void Read(Kernel::HLERequestContext& ctx) {
auto write_size = ctx.GetWriteBufferSize() / sizeof(DeliveryCacheDirectoryEntry);
LOG_DEBUG(Service_BCAT, "called, write_size={:016X}", write_size);
if (current_dir == nullptr) {
LOG_ERROR(Service_BCAT, "There is no open directory!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_NO_OPEN_ENTITY);
return;
}
const auto files = current_dir->GetFiles();
write_size = std::min(write_size, files.size());
std::vector<DeliveryCacheDirectoryEntry> entries(write_size);
std::transform(
files.begin(), files.begin() + write_size, entries.begin(), [](const auto& file) {
FileName name{};
std::memcpy(name.data(), file->GetName().data(),
std::min(file->GetName().size(), name.size()));
return DeliveryCacheDirectoryEntry{name, file->GetSize(), DigestFile(file)};
});
ctx.WriteBuffer(entries);
IPC::ResponseBuilder rb{ctx, 3};
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(write_size * sizeof(DeliveryCacheDirectoryEntry));
}
void GetCount(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_BCAT, "called");
if (current_dir == nullptr) {
LOG_ERROR(Service_BCAT, "There is no open directory!");
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(ERROR_NO_OPEN_ENTITY);
return;
}
const auto files = current_dir->GetFiles();
IPC::ResponseBuilder rb{ctx, 3};
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(files.size());
}
FileSys::VirtualDir root;
FileSys::VirtualDir current_dir;
};
class IDeliveryCacheStorageService final : public ServiceFramework<IDeliveryCacheStorageService> {
public:
IDeliveryCacheStorageService(FileSys::VirtualDir root_)
: ServiceFramework{"IDeliveryCacheStorageService"}, root(std::move(root_)) {
// clang-format off
static const FunctionInfo functions[] = {
{0, &IDeliveryCacheStorageService::CreateFileService, "CreateFileService"},
{1, &IDeliveryCacheStorageService::CreateDirectoryService, "CreateDirectoryService"},
{10, &IDeliveryCacheStorageService::EnumerateDeliveryCacheDirectory, "EnumerateDeliveryCacheDirectory"},
};
// clang-format on
RegisterHandlers(functions);
for (const auto& subdir : root->GetSubdirectories()) {
DirectoryName name{};
std::memcpy(name.data(), subdir->GetName().data(),
std::min(sizeof(DirectoryName) - 1, subdir->GetName().size()));
entries.push_back(name);
}
}
private:
void CreateFileService(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_BCAT, "called");
IPC::ResponseBuilder rb{ctx, 2, 0, 1};
rb.Push(RESULT_SUCCESS);
rb.PushIpcInterface<IDeliveryCacheFileService>(root);
}
void CreateDirectoryService(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_BCAT, "called");
IPC::ResponseBuilder rb{ctx, 2, 0, 1};
rb.Push(RESULT_SUCCESS);
rb.PushIpcInterface<IDeliveryCacheDirectoryService>(root);
}
void EnumerateDeliveryCacheDirectory(Kernel::HLERequestContext& ctx) {
auto size = ctx.GetWriteBufferSize() / sizeof(DirectoryName);
LOG_DEBUG(Service_BCAT, "called, size={:016X}", size);
size = std::min(size, entries.size() - next_read_index);
ctx.WriteBuffer(entries.data() + next_read_index, size * sizeof(DirectoryName));
next_read_index += size;
IPC::ResponseBuilder rb{ctx, 3};
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(size);
}
FileSys::VirtualDir root;
std::vector<DirectoryName> entries;
u64 next_read_index = 0;
};
void Module::Interface::CreateDeliveryCacheStorageService(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_BCAT, "called");
IPC::ResponseBuilder rb{ctx, 2, 0, 1};
rb.Push(RESULT_SUCCESS);
rb.PushIpcInterface<IDeliveryCacheStorageService>(
Service::FileSystem::GetBCATDirectory(Core::CurrentProcess()->GetTitleID()));
}
void Module::Interface::CreateDeliveryCacheStorageServiceWithApplicationId(
Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp{ctx};
const auto title_id = rp.PopRaw<u64>();
LOG_DEBUG(Service_BCAT, "called, title_id={:016X}", title_id);
IPC::ResponseBuilder rb{ctx, 2, 0, 1};
rb.Push(RESULT_SUCCESS);
rb.PushIpcInterface<IDeliveryCacheStorageService>(
Service::FileSystem::GetBCATDirectory(title_id));
}
namespace {
std::unique_ptr<Backend> CreateBackendFromSettings(DirectoryGetter getter) {
const auto backend = Settings::values.bcat_backend;
#ifdef YUZU_ENABLE_BOXCAT
if (backend == "boxcat")
return std::make_unique<Boxcat>(std::move(getter));
#endif
return std::make_unique<NullBackend>(std::move(getter));
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}
} // Anonymous namespace
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Module::Interface::Interface(std::shared_ptr<Module> module, const char* name)
: ServiceFramework(name), module(std::move(module)),
backend(CreateBackendFromSettings(&Service::FileSystem::GetBCATDirectory)) {}
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hle/service: Default constructors and destructors in the cpp file where applicable When a destructor isn't defaulted into a cpp file, it can cause the use of forward declarations to seemingly fail to compile for non-obvious reasons. It also allows inlining of the construction/destruction logic all over the place where a constructor or destructor is invoked, which can lead to code bloat. This isn't so much a worry here, given the services won't be created and destroyed frequently. The cause of the above mentioned non-obvious errors can be demonstrated as follows: ------- Demonstrative example, if you know how the described error happens, skip forwards ------- Assume we have the following in the header, which we'll call "thing.h": \#include <memory> // Forward declaration. For example purposes, assume the definition // of Object is in some header named "object.h" class Object; class Thing { public: // assume no constructors or destructors are specified here, // or the constructors/destructors are defined as: // // Thing() = default; // ~Thing() = default; // // ... Some interface member functions would be defined here private: std::shared_ptr<Object> obj; }; If this header is included in a cpp file, (which we'll call "main.cpp"), this will result in a compilation error, because even though no destructor is specified, the destructor will still need to be generated by the compiler because std::shared_ptr's destructor is *not* trivial (in other words, it does something other than nothing), as std::shared_ptr's destructor needs to do two things: 1. Decrement the shared reference count of the object being pointed to, and if the reference count decrements to zero, 2. Free the Object instance's memory (aka deallocate the memory it's pointing to). And so the compiler generates the code for the destructor doing this inside main.cpp. Now, keep in mind, the Object forward declaration is not a complete type. All it does is tell the compiler "a type named Object exists" and allows us to use the name in certain situations to avoid a header dependency. So the compiler needs to generate destruction code for Object, but the compiler doesn't know *how* to destruct it. A forward declaration doesn't tell the compiler anything about Object's constructor or destructor. So, the compiler will issue an error in this case because it's undefined behavior to try and deallocate (or construct) an incomplete type and std::shared_ptr and std::unique_ptr make sure this isn't the case internally. Now, if we had defaulted the destructor in "thing.cpp", where we also include "object.h", this would never be an issue, as the destructor would only have its code generated in one place, and it would be in a place where the full class definition of Object would be visible to the compiler. ---------------------- End example ---------------------------- Given these service classes are more than certainly going to change in the future, this defaults the constructors and destructors into the relevant cpp files to make the construction and destruction of all of the services consistent and unlikely to run into cases where forward declarations are indirectly causing compilation errors. It also has the plus of avoiding the need to rebuild several services if destruction logic changes, since it would only be necessary to recompile the single cpp file.
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Module::Interface::~Interface() = default;
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void InstallInterfaces(SM::ServiceManager& service_manager) {
auto module = std::make_shared<Module>();
std::make_shared<BCAT>(module, "bcat:a")->InstallAsService(service_manager);
std::make_shared<BCAT>(module, "bcat:m")->InstallAsService(service_manager);
std::make_shared<BCAT>(module, "bcat:u")->InstallAsService(service_manager);
std::make_shared<BCAT>(module, "bcat:s")->InstallAsService(service_manager);
}
} // namespace Service::BCAT