mirror of
https://github.com/cookiengineer/audacity
synced 2025-07-05 23:19:06 +02:00
8943494f8a
Several improvements in determining how much actual disk space a sampleblock uses. This allows us to provide how much space will be recovered when using File -> Compact Project. In addition, the History window now provides better space estimates.
109 lines
2.6 KiB
C++
109 lines
2.6 KiB
C++
/**********************************************************************
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Audacity: A Digital Audio Editor
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DBConection.h
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Paul Licameli -- split from ProjectFileIO.h
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**********************************************************************/
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#ifndef __AUDACITY_DB_CONNECTION__
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#define __AUDACITY_DB_CONNECTION__
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#include <atomic>
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#include <condition_variable>
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#include <map>
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#include <memory>
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#include <mutex>
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#include <thread>
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#include "ClientData.h"
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struct sqlite3;
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struct sqlite3_stmt;
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class wxString;
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class AudacityProject;
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class DBConnection
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{
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public:
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explicit
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DBConnection(const std::weak_ptr<AudacityProject> &pProject);
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~DBConnection();
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bool Open(const char *fileName);
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bool Close();
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bool SafeMode(const char *schema = "main");
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bool FastMode(const char *schema = "main");
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bool Assign(sqlite3 *handle);
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sqlite3 *Detach();
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sqlite3 *DB();
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int GetLastRC() const ;
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const wxString GetLastMessage() const;
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enum StatementID
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{
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GetSamples,
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GetSummary256,
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GetSummary64k,
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LoadSampleBlock,
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InsertSampleBlock,
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DeleteSampleBlock,
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GetRootPage,
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GetDBPage
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};
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sqlite3_stmt *GetStatement(enum StatementID id);
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sqlite3_stmt *Prepare(enum StatementID id, const char *sql);
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void SetBypass( bool bypass );
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bool ShouldBypass();
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private:
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bool ModeConfig(sqlite3 *db, const char *schema, const char *config);
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void CheckpointThread();
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static int CheckpointHook(void *data, sqlite3 *db, const char *schema, int pages);
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private:
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std::weak_ptr<AudacityProject> mpProject;
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sqlite3 *mDB;
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std::thread mCheckpointThread;
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std::condition_variable mCheckpointCondition;
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std::mutex mCheckpointMutex;
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std::atomic_bool mCheckpointStop{ false };
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std::atomic_bool mCheckpointPending{ false };
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std::atomic_bool mCheckpointActive{ false };
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std::map<enum StatementID, sqlite3_stmt *> mStatements;
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// Bypass transactions if database will be deleted after close
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bool mBypass;
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};
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using Connection = std::unique_ptr<DBConnection>;
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// This object attached to the project simply holds the pointer to the
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// project's current database connection, which is initialized on demand,
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// and may be redirected, temporarily or permanently, to another connection
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// when backing the project up or saving or saving-as.
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class ConnectionPtr final
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: public ClientData::Base
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, public std::enable_shared_from_this< ConnectionPtr >
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{
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public:
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static ConnectionPtr &Get( AudacityProject &project );
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static const ConnectionPtr &Get( const AudacityProject &project );
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~ConnectionPtr() override;
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Connection mpConnection;
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};
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#endif
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