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file_sys/registered_cache: Use unique_ptr and regular pointers instead of shared_ptrs where applicable

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The data retrieved in these cases are ultimately chiefly owned by either
the RegisteredCache instance itself, or the filesystem factories. Both
these should live throughout the use of their contained data. If they
don't, it should be considered an interface/design issue, and using
shared_ptr instances here would mask that, as the data would always be
prolonged after the main owner's lifetime ended.

This makes the lifetime of the data explicit and makes it harder to
accidentally create cyclic references. It also makes the interface
slightly more flexible than the previous API, as a shared_ptr can be
created from a unique_ptr, but not the other way around, so this allows
for that use-case if it ever becomes necessary in some form.
This commit is contained in:
Lioncash 2018-10-16 09:05:47 -04:00
parent 548958bcaf
commit 39ae73b356
12 changed files with 53 additions and 51 deletions
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13
src/core/hle/service/filesystem/filesystem.cpp
View file

@ -319,13 +319,12 @@ ResultVal<FileSys::VirtualDir> OpenSDMC() {
return sdmc_factory->Open();
}
std::shared_ptr<FileSys::RegisteredCacheUnion> GetUnionContents() {
return std::make_shared<FileSys::RegisteredCacheUnion>(
std::vector<std::shared_ptr<FileSys::RegisteredCache>>{
GetSystemNANDContents(), GetUserNANDContents(), GetSDMCContents()});
std::unique_ptr<FileSys::RegisteredCacheUnion> GetUnionContents() {
return std::make_unique<FileSys::RegisteredCacheUnion>(std::vector<FileSys::RegisteredCache*>{
GetSystemNANDContents(), GetUserNANDContents(), GetSDMCContents()});
}
std::shared_ptr<FileSys::RegisteredCache> GetSystemNANDContents() {
FileSys::RegisteredCache* GetSystemNANDContents() {
LOG_TRACE(Service_FS, "Opening System NAND Contents");
if (bis_factory == nullptr)
@ -334,7 +333,7 @@ std::shared_ptr<FileSys::RegisteredCache> GetSystemNANDContents() {
return bis_factory->GetSystemNANDContents();
}
std::shared_ptr<FileSys::RegisteredCache> GetUserNANDContents() {
FileSys::RegisteredCache* GetUserNANDContents() {
LOG_TRACE(Service_FS, "Opening User NAND Contents");
if (bis_factory == nullptr)
@ -343,7 +342,7 @@ std::shared_ptr<FileSys::RegisteredCache> GetUserNANDContents() {
return bis_factory->GetUserNANDContents();
}
std::shared_ptr<FileSys::RegisteredCache> GetSDMCContents() {
FileSys::RegisteredCache* GetSDMCContents() {
LOG_TRACE(Service_FS, "Opening SDMC Contents");
if (sdmc_factory == nullptr)

8
src/core/hle/service/filesystem/filesystem.h
View file

@ -47,11 +47,11 @@ ResultVal<FileSys::VirtualDir> OpenSaveData(FileSys::SaveDataSpaceId space,
FileSys::SaveDataDescriptor save_struct);
ResultVal<FileSys::VirtualDir> OpenSDMC();
std::shared_ptr<FileSys::RegisteredCacheUnion> GetUnionContents();
std::unique_ptr<FileSys::RegisteredCacheUnion> GetUnionContents();
std::shared_ptr<FileSys::RegisteredCache> GetSystemNANDContents();
std::shared_ptr<FileSys::RegisteredCache> GetUserNANDContents();
std::shared_ptr<FileSys::RegisteredCache> GetSDMCContents();
FileSys::RegisteredCache* GetSystemNANDContents();
FileSys::RegisteredCache* GetUserNANDContents();
FileSys::RegisteredCache* GetSDMCContents();
FileSys::VirtualDir GetModificationLoadRoot(u64 title_id);

2
src/core/hle/service/ns/pl_u.cpp
View file

@ -161,7 +161,7 @@ PL_U::PL_U() : ServiceFramework("pl:u"), impl{std::make_unique<Impl>()} {
};
RegisterHandlers(functions);
// Attempt to load shared font data from disk
const auto nand = FileSystem::GetSystemNANDContents();
const auto* nand = FileSystem::GetSystemNANDContents();
std::size_t offset = 0;
// Rebuild shared fonts from data ncas
if (nand->HasEntry(static_cast<u64>(FontArchives::Standard),