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57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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//! Persist service
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//!
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//! The persist service manages persistent app key-value stores. A persistent
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//! store is simply a SettingsFile identified by the app's UUID. The service
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//! manages the creation, opening and deletion of persist stores so that an app
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//! and its worker can both access the same file through a single file handle
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//! and SettingsFile state object.
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//!
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//! The persist service makes no attempt to make SettingsFile reentrant; it is
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//! the caller's responsibility to enforce mutual exclusion and prevent
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//! concurrent access to the SettingsFile.
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#include <stdint.h>
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#include <stddef.h>
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#include "util/uuid.h"
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#include "process_management/app_install_types.h"
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#include "system/status_codes.h"
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typedef struct SettingsFile SettingsFile;
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//! Initialize the persist service.
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void persist_service_init(void);
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//! Lock and get the persist store for the given app.
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SettingsFile *persist_service_lock_and_get_store(const Uuid *uuid);
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//! Unlock the given persist store.
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void persist_service_unlock_store(SettingsFile *store);
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//! Call during each process's startup.
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void persist_service_client_open(const Uuid *uuid);
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//! Call once after proces exits to clean it up.
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void persist_service_client_close(const Uuid *uuid);
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//! Deletes the app's persist file.
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status_t persist_service_delete_file(const Uuid *uuid);
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