FS.Archive: Clean up treatment of archives and their handles

- Refactor FS::Archive internals to make Archive creation and lifetime
  management clearer.
- Remove the "Archive as a File" hack.
- Implement 64-bit Archive handles.

11 files changed, 197 insertions, 387 deletions

diff --git a/src/core/file_sys/archive_backend.h b/src/core/file_sys/archive_backend.h
index 8d7a6a05..18c31488 100644
--- a/src/core/file_sys/archive_backend.h
+++ b/src/core/file_sys/archive_backend.h
@@ -220,36 +220,6 @@ public:
      * @return Opened directory, or nullptr
      */
     virtual std::unique_ptr<DirectoryBackend> OpenDirectory(const Path& path) const = 0;
-
-    /**
-     * Read data from the archive
-     * @param offset Offset in bytes to start reading data from
-     * @param length Length in bytes of data to read from archive
-     * @param buffer Buffer to read data into
-     * @return Number of bytes read
-     */
-    virtual size_t Read(const u64 offset, const u32 length, u8* buffer) const = 0;
-
-    /**
-     * Write data to the archive
-     * @param offset Offset in bytes to start writing data to
-     * @param length Length in bytes of data to write to archive
-     * @param buffer Buffer to write data from
-     * @param flush  The flush parameters (0 == do not flush)
-     * @return Number of bytes written
-     */
-    virtual size_t Write(const u64 offset, const u32 length, const u32 flush, u8* buffer) = 0;
-
-    /**
-     * Get the size of the archive in bytes
-     * @return Size of the archive in bytes
-     */
-    virtual size_t GetSize() const = 0;
-
-    /**
-     * Set the size of the archive in bytes
-     */
-    virtual void SetSize(const u64 size) = 0;
 };
 
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_romfs.cpp b/src/core/file_sys/archive_romfs.cpp
index c515e0dd..0709b62a 100644
--- a/src/core/file_sys/archive_romfs.cpp
+++ b/src/core/file_sys/archive_romfs.cpp
@@ -2,6 +2,8 @@
 // Licensed under GPLv2
 // Refer to the license.txt file included.
 
+#include <memory>
+
 #include "common/common_types.h"
 
 #include "core/file_sys/archive_romfs.h"
@@ -20,9 +22,6 @@ Archive_RomFS::Archive_RomFS(const Loader::AppLoader& app_loader) {
     }
 }
 
-Archive_RomFS::~Archive_RomFS() {
-}
-
 /**
  * Open a file specified by its path, using the specified mode
  * @param path Path relative to the archive
@@ -30,7 +29,7 @@ Archive_RomFS::~Archive_RomFS() {
  * @return Opened file, or nullptr
  */
 std::unique_ptr<FileBackend> Archive_RomFS::OpenFile(const Path& path, const Mode mode) const {
-    return std::unique_ptr<FileBackend>(new File_RomFS);
+    return std::make_unique<File_RomFS>(this);
 }
 
 /**
@@ -79,48 +78,7 @@ bool Archive_RomFS::RenameDirectory(const FileSys::Path& src_path, const FileSys
  * @return Opened directory, or nullptr
  */
 std::unique_ptr<DirectoryBackend> Archive_RomFS::OpenDirectory(const Path& path) const {
-    return std::unique_ptr<DirectoryBackend>(new Directory_RomFS);
-}
-
-/**
- * Read data from the archive
- * @param offset Offset in bytes to start reading data from
- * @param length Length in bytes of data to read from archive
- * @param buffer Buffer to read data into
- * @return Number of bytes read
- */
-size_t Archive_RomFS::Read(const u64 offset, const u32 length, u8* buffer) const {
-    LOG_TRACE(Service_FS, "called offset=%llu, length=%d", offset, length);
-    memcpy(buffer, &raw_data[(u32)offset], length);
-    return length;
-}
-
-/**
- * Write data to the archive
- * @param offset Offset in bytes to start writing data to
- * @param length Length in bytes of data to write to archive
- * @param buffer Buffer to write data from
- * @param flush  The flush parameters (0 == do not flush)
- * @return Number of bytes written
- */
-size_t Archive_RomFS::Write(const u64 offset, const u32 length, const u32 flush, u8* buffer) {
-    LOG_WARNING(Service_FS, "Attempted to write to ROMFS.");
-    return 0;
-}
-
-/**
- * Get the size of the archive in bytes
- * @return Size of the archive in bytes
- */
-size_t Archive_RomFS::GetSize() const {
-    return sizeof(u8) * raw_data.size();
-}
-
-/**
- * Set the size of the archive in bytes
- */
-void Archive_RomFS::SetSize(const u64 size) {
-    LOG_WARNING(Service_FS, "Attempted to set the size of ROMFS");
+    return std::make_unique<Directory_RomFS>();
 }
 
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_romfs.h b/src/core/file_sys/archive_romfs.h
index 0390821b..5b1ee633 100644
--- a/src/core/file_sys/archive_romfs.h
+++ b/src/core/file_sys/archive_romfs.h
@@ -20,7 +20,6 @@ namespace FileSys {
 class Archive_RomFS final : public ArchiveBackend {
 public:
     Archive_RomFS(const Loader::AppLoader& app_loader);
-    ~Archive_RomFS() override;
 
     std::string GetName() const override { return "RomFS"; }
 
@@ -76,37 +75,9 @@ public:
      */
     std::unique_ptr<DirectoryBackend> OpenDirectory(const Path& path) const override;
 
-    /**
-     * Read data from the archive
-     * @param offset Offset in bytes to start reading data from
-     * @param length Length in bytes of data to read from archive
-     * @param buffer Buffer to read data into
-     * @return Number of bytes read
-     */
-    size_t Read(const u64 offset, const u32 length, u8* buffer) const override;
-
-    /**
-     * Write data to the archive
-     * @param offset Offset in bytes to start writing data to
-     * @param length Length in bytes of data to write to archive
-     * @param buffer Buffer to write data from
-     * @param flush  The flush parameters (0 == do not flush)
-     * @return Number of bytes written
-     */
-    size_t Write(const u64 offset, const u32 length, const u32 flush, u8* buffer) override;
-
-    /**
-     * Get the size of the archive in bytes
-     * @return Size of the archive in bytes
-     */
-    size_t GetSize() const override;
-
-    /**
-     * Set the size of the archive in bytes
-     */
-    void SetSize(const u64 size) override;
-
 private:
+    friend class File_RomFS;
+
     std::vector<u8> raw_data;
 };
 
diff --git a/src/core/file_sys/archive_sdmc.cpp b/src/core/file_sys/archive_sdmc.cpp
index 43252b98..9d58668e 100644
--- a/src/core/file_sys/archive_sdmc.cpp
+++ b/src/core/file_sys/archive_sdmc.cpp
@@ -106,47 +106,6 @@ std::unique_ptr<DirectoryBackend> Archive_SDMC::OpenDirectory(const Path& path)
 }
 
 /**
- * Read data from the archive
- * @param offset Offset in bytes to start reading archive from
- * @param length Length in bytes to read data from archive
- * @param buffer Buffer to read data into
- * @return Number of bytes read
- */
-size_t Archive_SDMC::Read(const u64 offset, const u32 length, u8* buffer) const {
-    LOG_ERROR(Service_FS, "(UNIMPLEMENTED)");
-    return -1;
-}
-
-/**
- * Write data to the archive
- * @param offset Offset in bytes to start writing data to
- * @param length Length in bytes of data to write to archive
- * @param buffer Buffer to write data from
- * @param flush  The flush parameters (0 == do not flush)
- * @return Number of bytes written
- */
-size_t Archive_SDMC::Write(const u64 offset, const u32 length, const u32 flush, u8* buffer) {
-    LOG_ERROR(Service_FS, "(UNIMPLEMENTED)");
-    return -1;
-}
-
-/**
- * Get the size of the archive in bytes
- * @return Size of the archive in bytes
- */
-size_t Archive_SDMC::GetSize() const {
-    LOG_ERROR(Service_FS, "(UNIMPLEMENTED)");
-    return 0;
-}
-
-/**
- * Set the size of the archive in bytes
- */
-void Archive_SDMC::SetSize(const u64 size) {
-    LOG_ERROR(Service_FS, "(UNIMPLEMENTED)");
-}
-
-/**
  * Getter for the path used for this Archive
  * @return Mount point of that passthrough archive
  */
diff --git a/src/core/file_sys/archive_sdmc.h b/src/core/file_sys/archive_sdmc.h
index 5920051f..05904524 100644
--- a/src/core/file_sys/archive_sdmc.h
+++ b/src/core/file_sys/archive_sdmc.h
@@ -81,36 +81,6 @@ public:
     std::unique_ptr<DirectoryBackend> OpenDirectory(const Path& path) const override;
 
     /**
-     * Read data from the archive
-     * @param offset Offset in bytes to start reading archive from
-     * @param length Length in bytes to read data from archive
-     * @param buffer Buffer to read data into
-     * @return Number of bytes read
-     */
-    size_t Read(const u64 offset, const u32 length, u8* buffer) const override;
-
-    /**
-     * Write data to the archive
-     * @param offset Offset in bytes to start writing data to
-     * @param length Length in bytes of data to write to archive
-     * @param buffer Buffer to write data from
-     * @param flush  The flush parameters (0 == do not flush)
-     * @return Number of bytes written
-     */
-    size_t Write(const u64 offset, const u32 length, const u32 flush, u8* buffer) override;
-
-    /**
-     * Get the size of the archive in bytes
-     * @return Size of the archive in bytes
-     */
-    size_t GetSize() const override;
-
-    /**
-     * Set the size of the archive in bytes
-     */
-    void SetSize(const u64 size) override;
-
-    /**
      * Getter for the path used for this Archive
      * @return Mount point of that passthrough archive
      */
diff --git a/src/core/file_sys/file_romfs.cpp b/src/core/file_sys/file_romfs.cpp
index b55708df..5f38c270 100644
--- a/src/core/file_sys/file_romfs.cpp
+++ b/src/core/file_sys/file_romfs.cpp
@@ -5,24 +5,19 @@
 #include "common/common_types.h"
 
 #include "core/file_sys/file_romfs.h"
+#include "core/file_sys/archive_romfs.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
 namespace FileSys {
 
-File_RomFS::File_RomFS() {
-}
-
-File_RomFS::~File_RomFS() {
-}
-
 /**
  * Open the file
  * @return true if the file opened correctly
  */
 bool File_RomFS::Open() {
-    return false;
+    return true;
 }
 
 /**
@@ -33,7 +28,9 @@ bool File_RomFS::Open() {
  * @return Number of bytes read
  */
 size_t File_RomFS::Read(const u64 offset, const u32 length, u8* buffer) const {
-    return -1;
+    LOG_TRACE(Service_FS, "called offset=%llu, length=%d", offset, length);
+    memcpy(buffer, &archive->raw_data[(u32)offset], length);
+    return length;
 }
 
 /**
@@ -45,7 +42,8 @@ size_t File_RomFS::Read(const u64 offset, const u32 length, u8* buffer) const {
  * @return Number of bytes written
  */
 size_t File_RomFS::Write(const u64 offset, const u32 length, const u32 flush, const u8* buffer) const {
-    return -1;
+    LOG_WARNING(Service_FS, "Attempted to write to ROMFS.");
+    return 0;
 }
 
 /**
@@ -53,7 +51,7 @@ size_t File_RomFS::Write(const u64 offset, const u32 length, const u32 flush, co
  * @return Size of the file in bytes
  */
 size_t File_RomFS::GetSize() const {
-    return -1;
+    return sizeof(u8) * archive->raw_data.size();
 }
 
 /**
@@ -62,6 +60,7 @@ size_t File_RomFS::GetSize() const {
  * @return true if successful
  */
 bool File_RomFS::SetSize(const u64 size) const {
+    LOG_WARNING(Service_FS, "Attempted to set the size of ROMFS");
     return false;
 }
 
diff --git a/src/core/file_sys/file_romfs.h b/src/core/file_sys/file_romfs.h
index 4ddaafe2..09fa2e7e 100644
--- a/src/core/file_sys/file_romfs.h
+++ b/src/core/file_sys/file_romfs.h
@@ -14,10 +14,11 @@
 
 namespace FileSys {
 
+class Archive_RomFS;
+
 class File_RomFS final : public FileBackend {
 public:
-    File_RomFS();
-    ~File_RomFS() override;
+    File_RomFS(const Archive_RomFS* archive) : archive(archive) {}
 
     /**
      * Open the file
@@ -62,6 +63,9 @@ public:
      * @return true if the file closed correctly
      */
     bool Close() const override;
+
+private:
+    const Archive_RomFS* archive;
 };
 
 } // namespace FileSys
diff --git a/src/core/hle/service/fs/archive.cpp b/src/core/hle/service/fs/archive.cpp
index d04e5b2e..a4ee7a15 100644
--- a/src/core/hle/service/fs/archive.cpp
+++ b/src/core/hle/service/fs/archive.cpp
@@ -2,7 +2,8 @@
 // Licensed under GPLv2
 // Refer to the license.txt file included.
 
-#include <map>
+#include <memory>
+#include <unordered_map>
 
 #include "common/common_types.h"
 #include "common/file_util.h"
@@ -41,74 +42,24 @@ enum class DirectoryCommand : u32 {
     Close           = 0x08020000,
 };
 
-class Archive : public Kernel::Session {
+class Archive {
 public:
-    std::string GetName() const override { return "Archive: " + backend->GetName(); }
-
-    ArchiveIdCode id_code;      ///< Id code of the archive
-    FileSys::ArchiveBackend* backend;  ///< Archive backend interface
-
-    ResultVal<bool> SyncRequest() override {
-        u32* cmd_buff = Kernel::GetCommandBuffer();
-        FileCommand cmd = static_cast<FileCommand>(cmd_buff[0]);
-
-        switch (cmd) {
-        // Read from archive...
-        case FileCommand::Read:
-        {
-            u64 offset  = cmd_buff[1] | ((u64)cmd_buff[2] << 32);
-            u32 length  = cmd_buff[3];
-            u32 address = cmd_buff[5];
+    Archive(std::unique_ptr<FileSys::ArchiveBackend>&& backend, ArchiveIdCode id_code)
+            : backend(std::move(backend)), id_code(id_code) {
+    }
 
-            // Number of bytes read
-            cmd_buff[2] = backend->Read(offset, length, Memory::GetPointer(address));
-            break;
-        }
-        // Write to archive...
-        case FileCommand::Write:
-        {
-            u64 offset  = cmd_buff[1] | ((u64)cmd_buff[2] << 32);
-            u32 length  = cmd_buff[3];
-            u32 flush   = cmd_buff[4];
-            u32 address = cmd_buff[6];
+    std::string GetName() const { return "Archive: " + backend->GetName(); }
 
-            // Number of bytes written
-            cmd_buff[2] = backend->Write(offset, length, flush, Memory::GetPointer(address));
-            break;
-        }
-        case FileCommand::GetSize:
-        {
-            u64 filesize = (u64) backend->GetSize();
-            cmd_buff[2]  = (u32) filesize;         // Lower word
-            cmd_buff[3]  = (u32) (filesize >> 32); // Upper word
-            break;
-        }
-        case FileCommand::SetSize:
-        {
-            backend->SetSize(cmd_buff[1] | ((u64)cmd_buff[2] << 32));
-            break;
-        }
-        case FileCommand::Close:
-        {
-            LOG_TRACE(Service_FS, "Close %s %s", GetTypeName().c_str(), GetName().c_str());
-            CloseArchive(id_code);
-            break;
-        }
-        // Unknown command...
-        default:
-        {
-            LOG_ERROR(Service_FS, "Unknown command=0x%08X", cmd);
-            cmd_buff[0] = UnimplementedFunction(ErrorModule::FS).raw;
-            return MakeResult<bool>(false);
-        }
-        }
-        cmd_buff[1] = 0; // No error
-        return MakeResult<bool>(false);
-    }
+    ArchiveIdCode id_code; ///< Id code of the archive
+    std::unique_ptr<FileSys::ArchiveBackend> backend; ///< Archive backend interface
 };
 
 class File : public Kernel::Session {
 public:
+    File(std::unique_ptr<FileSys::FileBackend>&& backend, const FileSys::Path& path)
+            : backend(std::move(backend)), path(path) {
+    }
+
     std::string GetName() const override { return "Path: " + path.DebugStr(); }
 
     FileSys::Path path; ///< Path of the file
@@ -183,6 +134,10 @@ public:
 
 class Directory : public Kernel::Session {
 public:
+    Directory(std::unique_ptr<FileSys::DirectoryBackend>&& backend, const FileSys::Path& path)
+            : backend(std::move(backend)), path(path) {
+    }
+
     std::string GetName() const override { return "Directory: " + path.DebugStr(); }
 
     FileSys::Path path; ///< Path of the directory
@@ -228,105 +183,95 @@ public:
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
-std::map<ArchiveIdCode, Handle> g_archive_map; ///< Map of file archives by IdCode
+/**
+ * Map of registered archives, identified by id code. Once an archive is registered here, it is
+ * never removed until the FS service is shut down.
+ */
+static std::unordered_map<ArchiveIdCode, std::unique_ptr<Archive>> id_code_map;
 
-ResultVal<Handle> OpenArchive(ArchiveIdCode id_code) {
-    auto itr = g_archive_map.find(id_code);
-    if (itr == g_archive_map.end()) {
+/**
+ * Map of active archive handles. Values are pointers to the archives in `idcode_map`.
+ */
+static std::unordered_map<ArchiveHandle, Archive*> handle_map;
+static ArchiveHandle next_handle;
+
+static Archive* GetArchive(ArchiveHandle handle) {
+    auto itr = handle_map.find(handle);
+    return (itr == handle_map.end()) ? nullptr : itr->second;
+}
+
+ResultVal<ArchiveHandle> OpenArchive(ArchiveIdCode id_code) {
+    LOG_TRACE(Service_FS, "Opening archive with id code 0x%08X", id_code);
+
+    auto itr = id_code_map.find(id_code);
+    if (itr == id_code_map.end()) {
+        // TODO: Verify error against hardware
         return ResultCode(ErrorDescription::NotFound, ErrorModule::FS,
                 ErrorSummary::NotFound, ErrorLevel::Permanent);
     }
 
-    return MakeResult<Handle>(itr->second);
+    // This should never even happen in the first place with 64-bit handles, 
+    while (handle_map.count(next_handle) != 0) {
+        ++next_handle;
+    }
+    handle_map.emplace(next_handle, itr->second.get());
+    return MakeResult<ArchiveHandle>(next_handle++);
 }
 
-ResultCode CloseArchive(ArchiveIdCode id_code) {
-    auto itr = g_archive_map.find(id_code);
-    if (itr == g_archive_map.end()) {
-        LOG_ERROR(Service_FS, "Cannot close archive %d, does not exist!", (int)id_code);
+ResultCode CloseArchive(ArchiveHandle handle) {
+    if (handle_map.erase(handle) == 0)
         return InvalidHandle(ErrorModule::FS);
-    }
-
-    LOG_TRACE(Service_FS, "Closed archive %d", (int) id_code);
-    return RESULT_SUCCESS;
+    else
+        return RESULT_SUCCESS;
 }
 
-/**
- * Mounts an archive
- * @param archive Pointer to the archive to mount
- */
-ResultCode MountArchive(Archive* archive) {
-    ArchiveIdCode id_code = archive->id_code;
-    ResultVal<Handle> archive_handle = OpenArchive(id_code);
-    if (archive_handle.Succeeded()) {
-        LOG_ERROR(Service_FS, "Cannot mount two archives with the same ID code! (%d)", (int) id_code);
-        return archive_handle.Code();
-    }
-    g_archive_map[id_code] = archive->GetHandle();
-    LOG_TRACE(Service_FS, "Mounted archive %s", archive->GetName().c_str());
-    return RESULT_SUCCESS;
-}
+// TODO(yuriks): This might be what the fs:REG service is for. See the Register/Unregister calls in
+// http://3dbrew.org/wiki/Filesystem_services#ProgramRegistry_service_.22fs:REG.22
+ResultCode CreateArchive(std::unique_ptr<FileSys::ArchiveBackend>&& backend, ArchiveIdCode id_code) {
+    auto result = id_code_map.emplace(id_code, std::make_unique<Archive>(std::move(backend), id_code));
 
-ResultCode CreateArchive(FileSys::ArchiveBackend* backend, ArchiveIdCode id_code) {
-    Archive* archive = new Archive;
-    Handle handle = Kernel::g_object_pool.Create(archive);
-    archive->id_code = id_code;
-    archive->backend = backend;
+    bool inserted = result.second;
+    _dbg_assert_msg_(Service_FS, inserted, "Tried to register more than one archive with same id code");
 
-    ResultCode result = MountArchive(archive);
-    if (result.IsError()) {
-        return result;
-    }
-    
+    auto& archive = result.first->second;
+    LOG_DEBUG(Service_FS, "Registered archive %s with id code 0x%08X", archive->GetName().c_str(), id_code);
     return RESULT_SUCCESS;
 }
 
-ResultVal<Handle> OpenFileFromArchive(Handle archive_handle, const FileSys::Path& path, const FileSys::Mode mode) {
-    // TODO(bunnei): Binary type files get a raw file pointer to the archive. Currently, we create
-    // the archive file handles at app loading, and then keep them persistent throughout execution.
-    // Archives file handles are just reused and not actually freed until emulation shut down.
-    // Verify if real hardware works this way, or if new handles are created each time
-    if (path.GetType() == FileSys::Binary)
-        // TODO(bunnei): FixMe - this is a hack to compensate for an incorrect FileSys backend
-        // design. While the functionally of this is OK, our implementation decision to separate
-        // normal files from archive file pointers is very likely wrong.
-        // See https://github.com/citra-emu/citra/issues/205
-        return MakeResult<Handle>(archive_handle);
-
-    File* file = new File;
-    Handle handle = Kernel::g_object_pool.Create(file);
-
-    Archive* archive = Kernel::g_object_pool.Get<Archive>(archive_handle);
-    if (archive == nullptr) {
+ResultVal<Handle> OpenFileFromArchive(ArchiveHandle archive_handle, const FileSys::Path& path, const FileSys::Mode mode) {
+    Archive* archive = GetArchive(archive_handle);
+    if (archive == nullptr)
         return InvalidHandle(ErrorModule::FS);
-    }
-    file->path = path;
-    file->backend = archive->backend->OpenFile(path, mode);
 
-    if (!file->backend) {
+    std::unique_ptr<FileSys::FileBackend> backend = archive->backend->OpenFile(path, mode);
+    if (backend == nullptr) {
         return ResultCode(ErrorDescription::NotFound, ErrorModule::FS,
-                ErrorSummary::NotFound, ErrorLevel::Permanent);
+                          ErrorSummary::NotFound, ErrorLevel::Permanent);
     }
 
+    auto file = std::make_unique<File>(std::move(backend), path);
+    Handle handle = Kernel::g_object_pool.Create(file.release());
     return MakeResult<Handle>(handle);
 }
 
-ResultCode DeleteFileFromArchive(Handle archive_handle, const FileSys::Path& path) {
-    Archive* archive = Kernel::g_object_pool.GetFast<Archive>(archive_handle);
+ResultCode DeleteFileFromArchive(ArchiveHandle archive_handle, const FileSys::Path& path) {
+    Archive* archive = GetArchive(archive_handle);
     if (archive == nullptr)
         return InvalidHandle(ErrorModule::FS);
+
     if (archive->backend->DeleteFile(path))
         return RESULT_SUCCESS;
     return ResultCode(ErrorDescription::NoData, ErrorModule::FS, // TODO: verify description
                       ErrorSummary::Canceled, ErrorLevel::Status);
 }
 
-ResultCode RenameFileBetweenArchives(Handle src_archive_handle, const FileSys::Path& src_path,
-                                     Handle dest_archive_handle, const FileSys::Path& dest_path) {
-    Archive* src_archive = Kernel::g_object_pool.GetFast<Archive>(src_archive_handle);
-    Archive* dest_archive = Kernel::g_object_pool.GetFast<Archive>(dest_archive_handle);
+ResultCode RenameFileBetweenArchives(ArchiveHandle src_archive_handle, const FileSys::Path& src_path,
+                                     ArchiveHandle dest_archive_handle, const FileSys::Path& dest_path) {
+    Archive* src_archive = GetArchive(src_archive_handle);
+    Archive* dest_archive = GetArchive(dest_archive_handle);
     if (src_archive == nullptr || dest_archive == nullptr)
         return InvalidHandle(ErrorModule::FS);
+
     if (src_archive == dest_archive) {
         if (src_archive->backend->RenameFile(src_path, dest_path))
             return RESULT_SUCCESS;
@@ -334,36 +279,42 @@ ResultCode RenameFileBetweenArchives(Handle src_archive_handle, const FileSys::P
         // TODO: Implement renaming across archives
         return UnimplementedFunction(ErrorModule::FS);
     }
+
+    // TODO(yuriks): This code probably isn't right, it'll return a Status even if the file didn't
+    // exist or similar. Verify.
     return ResultCode(ErrorDescription::NoData, ErrorModule::FS, // TODO: verify description
                       ErrorSummary::NothingHappened, ErrorLevel::Status);
 }
 
-ResultCode DeleteDirectoryFromArchive(Handle archive_handle, const FileSys::Path& path) {
-    Archive* archive = Kernel::g_object_pool.GetFast<Archive>(archive_handle);
+ResultCode DeleteDirectoryFromArchive(ArchiveHandle archive_handle, const FileSys::Path& path) {
+    Archive* archive = GetArchive(archive_handle);
     if (archive == nullptr)
         return InvalidHandle(ErrorModule::FS);
+
     if (archive->backend->DeleteDirectory(path))
         return RESULT_SUCCESS;
     return ResultCode(ErrorDescription::NoData, ErrorModule::FS, // TODO: verify description
                       ErrorSummary::Canceled, ErrorLevel::Status);
 }
 
-ResultCode CreateDirectoryFromArchive(Handle archive_handle, const FileSys::Path& path) {
-    Archive* archive = Kernel::g_object_pool.GetFast<Archive>(archive_handle);
+ResultCode CreateDirectoryFromArchive(ArchiveHandle archive_handle, const FileSys::Path& path) {
+    Archive* archive = GetArchive(archive_handle);
     if (archive == nullptr)
         return InvalidHandle(ErrorModule::FS);
+
     if (archive->backend->CreateDirectory(path))
         return RESULT_SUCCESS;
     return ResultCode(ErrorDescription::NoData, ErrorModule::FS, // TODO: verify description
                       ErrorSummary::Canceled, ErrorLevel::Status);
 }
 
-ResultCode RenameDirectoryBetweenArchives(Handle src_archive_handle, const FileSys::Path& src_path,
-                                          Handle dest_archive_handle, const FileSys::Path& dest_path) {
-    Archive* src_archive = Kernel::g_object_pool.GetFast<Archive>(src_archive_handle);
-    Archive* dest_archive = Kernel::g_object_pool.GetFast<Archive>(dest_archive_handle);
+ResultCode RenameDirectoryBetweenArchives(ArchiveHandle src_archive_handle, const FileSys::Path& src_path,
+                                          ArchiveHandle dest_archive_handle, const FileSys::Path& dest_path) {
+    Archive* src_archive = GetArchive(src_archive_handle);
+    Archive* dest_archive = GetArchive(dest_archive_handle);
     if (src_archive == nullptr || dest_archive == nullptr)
         return InvalidHandle(ErrorModule::FS);
+
     if (src_archive == dest_archive) {
         if (src_archive->backend->RenameDirectory(src_path, dest_path))
             return RESULT_SUCCESS;
@@ -371,6 +322,9 @@ ResultCode RenameDirectoryBetweenArchives(Handle src_archive_handle, const FileS
         // TODO: Implement renaming across archives
         return UnimplementedFunction(ErrorModule::FS);
     }
+
+    // TODO(yuriks): This code probably isn't right, it'll return a Status even if the file didn't
+    // exist or similar. Verify.
     return ResultCode(ErrorDescription::NoData, ErrorModule::FS, // TODO: verify description
                       ErrorSummary::NothingHappened, ErrorLevel::Status);
 }
@@ -381,44 +335,42 @@ ResultCode RenameDirectoryBetweenArchives(Handle src_archive_handle, const FileS
  * @param path Path to the Directory inside of the Archive
  * @return Opened Directory object
  */
-ResultVal<Handle> OpenDirectoryFromArchive(Handle archive_handle, const FileSys::Path& path) {
-    Directory* directory = new Directory;
-    Handle handle = Kernel::g_object_pool.Create(directory);
-
-    Archive* archive = Kernel::g_object_pool.Get<Archive>(archive_handle);
-    if (archive == nullptr) {
+ResultVal<Handle> OpenDirectoryFromArchive(ArchiveHandle archive_handle, const FileSys::Path& path) {
+    Archive* archive = GetArchive(archive_handle);
+    if (archive == nullptr)
         return InvalidHandle(ErrorModule::FS);
-    }
-    directory->path = path;
-    directory->backend = archive->backend->OpenDirectory(path);
 
-    if (!directory->backend) {
+    std::unique_ptr<FileSys::DirectoryBackend> backend = archive->backend->OpenDirectory(path);
+    if (backend == nullptr) {
         return ResultCode(ErrorDescription::NotFound, ErrorModule::FS,
                           ErrorSummary::NotFound, ErrorLevel::Permanent);
     }
 
+    auto directory = std::make_unique<Directory>(std::move(backend), path);
+    Handle handle = Kernel::g_object_pool.Create(directory.release());
     return MakeResult<Handle>(handle);
 }
 
 /// Initialize archives
 void ArchiveInit() {
-    g_archive_map.clear();
+    next_handle = 1;
 
     // TODO(Link Mauve): Add the other archive types (see here for the known types:
     // http://3dbrew.org/wiki/FS:OpenArchive#Archive_idcodes).  Currently the only half-finished
     // archive type is SDMC, so it is the only one getting exposed.
 
     std::string sdmc_directory = FileUtil::GetUserPath(D_SDMC_IDX);
-    auto archive = new FileSys::Archive_SDMC(sdmc_directory);
+    auto archive = std::make_unique<FileSys::Archive_SDMC>(sdmc_directory);
     if (archive->Initialize())
-        CreateArchive(archive, ArchiveIdCode::SDMC);
+        CreateArchive(std::move(archive), ArchiveIdCode::SDMC);
     else
         LOG_ERROR(Service_FS, "Can't instantiate SDMC archive with path %s", sdmc_directory.c_str());
 }
 
 /// Shutdown archives
 void ArchiveShutdown() {
-    g_archive_map.clear();
+    handle_map.clear();
+    id_code_map.clear();
 }
 
 } // namespace FS
diff --git a/src/core/hle/service/fs/archive.h b/src/core/hle/service/fs/archive.h
index 2c50dfff..a38de92e 100644
--- a/src/core/hle/service/fs/archive.h
+++ b/src/core/hle/service/fs/archive.h
@@ -24,25 +24,27 @@ enum class ArchiveIdCode : u32 {
     SDMCWriteOnly       = 0x0000000A,
 };
 
+typedef u64 ArchiveHandle;
+
 /**
  * Opens an archive
  * @param id_code IdCode of the archive to open
  * @return Handle to the opened archive
  */
-ResultVal<Handle> OpenArchive(ArchiveIdCode id_code);
+ResultVal<ArchiveHandle> OpenArchive(ArchiveIdCode id_code);
 
 /**
  * Closes an archive
  * @param id_code IdCode of the archive to open
  */
-ResultCode CloseArchive(ArchiveIdCode id_code);
+ResultCode CloseArchive(ArchiveHandle handle);
 
 /**
  * Creates an Archive
  * @param backend File system backend interface to the archive
  * @param id_code Id code used to access this type of archive
  */
-ResultCode CreateArchive(FileSys::ArchiveBackend* backend, ArchiveIdCode id_code);
+ResultCode CreateArchive(std::unique_ptr<FileSys::ArchiveBackend>&& backend, ArchiveIdCode id_code);
 
 /**
  * Open a File from an Archive
@@ -51,7 +53,7 @@ ResultCode CreateArchive(FileSys::ArchiveBackend* backend, ArchiveIdCode id_code
  * @param mode Mode under which to open the File
  * @return Handle to the opened File object
  */
-ResultVal<Handle> OpenFileFromArchive(Handle archive_handle, const FileSys::Path& path, const FileSys::Mode mode);
+ResultVal<Handle> OpenFileFromArchive(ArchiveHandle archive_handle, const FileSys::Path& path, const FileSys::Mode mode);
 
 /**
  * Delete a File from an Archive
@@ -59,7 +61,7 @@ ResultVal<Handle> OpenFileFromArchive(Handle archive_handle, const FileSys::Path
  * @param path Path to the File inside of the Archive
  * @return Whether deletion succeeded
  */
-ResultCode DeleteFileFromArchive(Handle archive_handle, const FileSys::Path& path);
+ResultCode DeleteFileFromArchive(ArchiveHandle archive_handle, const FileSys::Path& path);
 
 /**
  * Rename a File between two Archives
@@ -69,8 +71,8 @@ ResultCode DeleteFileFromArchive(Handle archive_handle, const FileSys::Path& pat
  * @param dest_path Path to the File inside of the destination Archive
  * @return Whether rename succeeded
  */
-ResultCode RenameFileBetweenArchives(Handle src_archive_handle, const FileSys::Path& src_path,
-                                     Handle dest_archive_handle, const FileSys::Path& dest_path);
+ResultCode RenameFileBetweenArchives(ArchiveHandle src_archive_handle, const FileSys::Path& src_path,
+                                     ArchiveHandle dest_archive_handle, const FileSys::Path& dest_path);
 
 /**
  * Delete a Directory from an Archive
@@ -78,7 +80,7 @@ ResultCode RenameFileBetweenArchives(Handle src_archive_handle, const FileSys::P
  * @param path Path to the Directory inside of the Archive
  * @return Whether deletion succeeded
  */
-ResultCode DeleteDirectoryFromArchive(Handle archive_handle, const FileSys::Path& path);
+ResultCode DeleteDirectoryFromArchive(ArchiveHandle archive_handle, const FileSys::Path& path);
 
 /**
  * Create a Directory from an Archive
@@ -86,7 +88,7 @@ ResultCode DeleteDirectoryFromArchive(Handle archive_handle, const FileSys::Path
  * @param path Path to the Directory inside of the Archive
  * @return Whether creation of directory succeeded
  */
-ResultCode CreateDirectoryFromArchive(Handle archive_handle, const FileSys::Path& path);
+ResultCode CreateDirectoryFromArchive(ArchiveHandle archive_handle, const FileSys::Path& path);
 
 /**
  * Rename a Directory between two Archives
@@ -96,8 +98,8 @@ ResultCode CreateDirectoryFromArchive(Handle archive_handle, const FileSys::Path
  * @param dest_path Path to the Directory inside of the destination Archive
  * @return Whether rename succeeded
  */
-ResultCode RenameDirectoryBetweenArchives(Handle src_archive_handle, const FileSys::Path& src_path,
-                                          Handle dest_archive_handle, const FileSys::Path& dest_path);
+ResultCode RenameDirectoryBetweenArchives(ArchiveHandle src_archive_handle, const FileSys::Path& src_path,
+                                          ArchiveHandle dest_archive_handle, const FileSys::Path& dest_path);
 
 /**
  * Open a Directory from an Archive
@@ -105,7 +107,7 @@ ResultCode RenameDirectoryBetweenArchives(Handle src_archive_handle, const FileS
  * @param path Path to the Directory inside of the Archive
  * @return Handle to the opened File object
  */
-ResultVal<Handle> OpenDirectoryFromArchive(Handle archive_handle, const FileSys::Path& path);
+ResultVal<Handle> OpenDirectoryFromArchive(ArchiveHandle archive_handle, const FileSys::Path& path);
 
 /// Initialize archives
 void ArchiveInit();
diff --git a/src/core/hle/service/fs/fs_user.cpp b/src/core/hle/service/fs/fs_user.cpp
index eda7cb8a..0f75d5e3 100644
--- a/src/core/hle/service/fs/fs_user.cpp
+++ b/src/core/hle/service/fs/fs_user.cpp
@@ -3,6 +3,7 @@
 // Refer to the license.txt file included.
 
 #include "common/common.h"
+#include "common/scope_exit.h"
 
 #include "common/string_util.h"
 #include "core/hle/service/fs/archive.h"
@@ -16,6 +17,10 @@
 namespace Service {
 namespace FS {
 
+static ArchiveHandle MakeArchiveHandle(u32 low_word, u32 high_word) {
+    return (u64)low_word | ((u64)high_word << 32);
+}
+
 static void Initialize(Service::Interface* self) {
     u32* cmd_buff = Kernel::GetCommandBuffer();
 
@@ -62,6 +67,7 @@ static void OpenFile(Service::Interface* self) {
     if (handle.Succeeded()) {
         cmd_buff[3] = *handle;
     } else {
+        cmd_buff[3] = 0;
         LOG_ERROR(Service_FS, "failed to get a handle for file %s", file_path.DebugStr().c_str());
     }
 }
@@ -106,25 +112,25 @@ static void OpenFileDirectly(Service::Interface* self) {
     if (archive_path.GetType() != FileSys::Empty) {
         LOG_ERROR(Service_FS, "archive LowPath type other than empty is currently unsupported");
         cmd_buff[1] = UnimplementedFunction(ErrorModule::FS).raw;
+        cmd_buff[3] = 0;
         return;
     }
 
-    // TODO(Link Mauve): Check if we should even get a handle for the archive, and don't leak it
-    // TODO(yuriks): Why is there all this duplicate (and seemingly useless) code up here?
-    ResultVal<Handle> archive_handle = OpenArchive(archive_id);
-    cmd_buff[1] = archive_handle.Code().raw;
+    ResultVal<ArchiveHandle> archive_handle = OpenArchive(archive_id);
     if (archive_handle.Failed()) {
         LOG_ERROR(Service_FS, "failed to get a handle for archive");
+        cmd_buff[1] = archive_handle.Code().raw;
+        cmd_buff[3] = 0;
         return;
     }
-    // cmd_buff[2] isn't used according to 3dmoo's implementation.
-    cmd_buff[3] = *archive_handle;
+    SCOPE_EXIT({ CloseArchive(*archive_handle); });
 
     ResultVal<Handle> handle = OpenFileFromArchive(*archive_handle, file_path, mode);
     cmd_buff[1] = handle.Code().raw;
     if (handle.Succeeded()) {
         cmd_buff[3] = *handle;
     } else {
+        cmd_buff[3] = 0;
         LOG_ERROR(Service_FS, "failed to get a handle for file %s", file_path.DebugStr().c_str());
     }
 }
@@ -140,12 +146,10 @@ static void OpenFileDirectly(Service::Interface* self) {
  *  Outputs:
  *      1 : Result of function, 0 on success, otherwise error code
  */
-void DeleteFile(Service::Interface* self) {
+static void DeleteFile(Service::Interface* self) {
     u32* cmd_buff = Kernel::GetCommandBuffer();
 
-    // TODO(Link Mauve): cmd_buff[2], aka archive handle lower word, isn't used according to
-    // 3dmoo's or ctrulib's implementations.  Triple check if it's really the case.
-    Handle archive_handle = static_cast<Handle>(cmd_buff[3]);
+    ArchiveHandle archive_handle = MakeArchiveHandle(cmd_buff[2], cmd_buff[3]);
     auto filename_type    = static_cast<FileSys::LowPathType>(cmd_buff[4]);
     u32 filename_size     = cmd_buff[5];
     u32 filename_ptr      = cmd_buff[7];
@@ -174,15 +178,13 @@ void DeleteFile(Service::Interface* self) {
  *  Outputs:
  *      1 : Result of function, 0 on success, otherwise error code
  */
-void RenameFile(Service::Interface* self) {
+static void RenameFile(Service::Interface* self) {
     u32* cmd_buff = Kernel::GetCommandBuffer();
 
-    // TODO(Link Mauve): cmd_buff[2] and cmd_buff[6], aka archive handle lower word, aren't used according to
-    // 3dmoo's or ctrulib's implementations.  Triple check if it's really the case.
-    Handle src_archive_handle  = static_cast<Handle>(cmd_buff[3]);
+    ArchiveHandle src_archive_handle = MakeArchiveHandle(cmd_buff[2], cmd_buff[3]);
     auto src_filename_type     = static_cast<FileSys::LowPathType>(cmd_buff[4]);
     u32 src_filename_size      = cmd_buff[5];
-    Handle dest_archive_handle = static_cast<Handle>(cmd_buff[7]);
+    ArchiveHandle dest_archive_handle = MakeArchiveHandle(cmd_buff[6], cmd_buff[7]);;
     auto dest_filename_type    = static_cast<FileSys::LowPathType>(cmd_buff[8]);
     u32 dest_filename_size     = cmd_buff[9];
     u32 src_filename_ptr       = cmd_buff[11];
@@ -209,12 +211,10 @@ void RenameFile(Service::Interface* self) {
  *  Outputs:
  *      1 : Result of function, 0 on success, otherwise error code
  */
-void DeleteDirectory(Service::Interface* self) {
+static void DeleteDirectory(Service::Interface* self) {
     u32* cmd_buff = Kernel::GetCommandBuffer();
 
-    // TODO(Link Mauve): cmd_buff[2], aka archive handle lower word, isn't used according to
-    // 3dmoo's or ctrulib's implementations.  Triple check if it's really the case.
-    Handle archive_handle = static_cast<Handle>(cmd_buff[3]);
+    ArchiveHandle archive_handle = MakeArchiveHandle(cmd_buff[2], cmd_buff[3]);
     auto dirname_type     = static_cast<FileSys::LowPathType>(cmd_buff[4]);
     u32 dirname_size      = cmd_buff[5];
     u32 dirname_ptr       = cmd_buff[7];
@@ -241,9 +241,7 @@ void DeleteDirectory(Service::Interface* self) {
 static void CreateDirectory(Service::Interface* self) {
     u32* cmd_buff = Kernel::GetCommandBuffer();
 
-    // TODO: cmd_buff[2], aka archive handle lower word, isn't used according to
-    // 3dmoo's or ctrulib's implementations.  Triple check if it's really the case.
-    Handle archive_handle = static_cast<Handle>(cmd_buff[3]);
+    ArchiveHandle archive_handle = MakeArchiveHandle(cmd_buff[2], cmd_buff[3]);
     auto dirname_type = static_cast<FileSys::LowPathType>(cmd_buff[4]);
     u32 dirname_size = cmd_buff[5];
     u32 dirname_ptr = cmd_buff[8];
@@ -271,15 +269,13 @@ static void CreateDirectory(Service::Interface* self) {
  *  Outputs:
  *      1 : Result of function, 0 on success, otherwise error code
  */
-void RenameDirectory(Service::Interface* self) {
+static void RenameDirectory(Service::Interface* self) {
     u32* cmd_buff = Kernel::GetCommandBuffer();
 
-    // TODO(Link Mauve): cmd_buff[2] and cmd_buff[6], aka archive handle lower word, aren't used according to
-    // 3dmoo's or ctrulib's implementations.  Triple check if it's really the case.
-    Handle src_archive_handle  = static_cast<Handle>(cmd_buff[3]);
+    ArchiveHandle src_archive_handle = MakeArchiveHandle(cmd_buff[2], cmd_buff[3]);
     auto src_dirname_type      = static_cast<FileSys::LowPathType>(cmd_buff[4]);
     u32 src_dirname_size       = cmd_buff[5];
-    Handle dest_archive_handle = static_cast<Handle>(cmd_buff[7]);
+    ArchiveHandle dest_archive_handle = MakeArchiveHandle(cmd_buff[6], cmd_buff[7]);
     auto dest_dirname_type     = static_cast<FileSys::LowPathType>(cmd_buff[8]);
     u32 dest_dirname_size      = cmd_buff[9];
     u32 src_dirname_ptr        = cmd_buff[11];
@@ -295,12 +291,23 @@ void RenameDirectory(Service::Interface* self) {
     cmd_buff[1] = RenameDirectoryBetweenArchives(src_archive_handle, src_dir_path, dest_archive_handle, dest_dir_path).raw;
 }
 
+/**
+ * FS_User::OpenDirectory service function
+ *  Inputs:
+ *      1 : Archive handle low word
+ *      2 : Archive handle high word
+ *      3 : Low path type
+ *      4 : Low path size
+ *      7 : (LowPathSize << 14) | 2
+ *      8 : Low path data pointer
+ *  Outputs:
+ *      1 : Result of function, 0 on success, otherwise error code
+ *      3 : Directory handle
+ */
 static void OpenDirectory(Service::Interface* self) {
     u32* cmd_buff = Kernel::GetCommandBuffer();
 
-    // TODO(Link Mauve): cmd_buff[2], aka archive handle lower word, isn't used according to
-    // 3dmoo's or ctrulib's implementations.  Triple check if it's really the case.
-    Handle archive_handle = static_cast<Handle>(cmd_buff[2]);
+    ArchiveHandle archive_handle = MakeArchiveHandle(cmd_buff[1], cmd_buff[2]);
     auto dirname_type = static_cast<FileSys::LowPathType>(cmd_buff[3]);
     u32 dirname_size = cmd_buff[4];
     u32 dirname_ptr = cmd_buff[6];
@@ -348,16 +355,34 @@ static void OpenArchive(Service::Interface* self) {
         return;
     }
 
-    ResultVal<Handle> handle = OpenArchive(archive_id);
+    ResultVal<ArchiveHandle> handle = OpenArchive(archive_id);
     cmd_buff[1] = handle.Code().raw;
     if (handle.Succeeded()) {
-        // cmd_buff[2] isn't used according to 3dmoo's implementation.
-        cmd_buff[3] = *handle;
+        cmd_buff[2] = *handle & 0xFFFFFFFF;
+        cmd_buff[3] = (*handle >> 32) & 0xFFFFFFFF;
     } else {
+        cmd_buff[2] = cmd_buff[3] = 0;
         LOG_ERROR(Service_FS, "failed to get a handle for archive");
     }
 }
 
+/**
+ * FS_User::CloseArchive service function
+ *  Inputs:
+ *      0 : 0x080E0080
+ *      1 : Archive handle low word
+ *      2 : Archive handle high word
+ *  Outputs:
+ *      0 : ??? TODO(yuriks): Verify return header
+ *      1 : Result of function, 0 on success, otherwise error code
+ */
+static void CloseArchive(Service::Interface* self) {
+    u32* cmd_buff = Kernel::GetCommandBuffer();
+
+    ArchiveHandle archive_handle = MakeArchiveHandle(cmd_buff[1], cmd_buff[2]);
+    cmd_buff[1] = CloseArchive(archive_handle).raw;
+}
+
 /*
 * FS_User::IsSdmcDetected service function
 *  Outputs:
@@ -389,7 +414,7 @@ const FSUserInterface::FunctionInfo FunctionTable[] = {
     {0x080B0102, OpenDirectory,         "OpenDirectory"},
     {0x080C00C2, OpenArchive,           "OpenArchive"},
     {0x080D0144, nullptr,               "ControlArchive"},
-    {0x080E0080, nullptr,               "CloseArchive"},
+    {0x080E0080, CloseArchive,          "CloseArchive"},
     {0x080F0180, nullptr,               "FormatThisUserSaveData"},
     {0x08100200, nullptr,               "CreateSystemSaveData"},
     {0x08110040, nullptr,               "DeleteSystemSaveData"},
diff --git a/src/core/loader/loader.cpp b/src/core/loader/loader.cpp
index 49f8c458..463dacca 100644
--- a/src/core/loader/loader.cpp
+++ b/src/core/loader/loader.cpp
@@ -74,7 +74,7 @@ ResultStatus LoadFile(const std::string& filename) {
 
         // Load application and RomFS
         if (ResultStatus::Success == app_loader.Load()) {
-            Service::FS::CreateArchive(new FileSys::Archive_RomFS(app_loader), Service::FS::ArchiveIdCode::RomFS);
+            Service::FS::CreateArchive(std::make_unique<FileSys::Archive_RomFS>(app_loader), Service::FS::ArchiveIdCode::RomFS);
             return ResultStatus::Success;
         }
         break;