mirror of
https://github.com/ncruces/go-sqlite3.git
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99 lines
4.1 KiB
Go
99 lines
4.1 KiB
Go
package sqlite3vfs
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// OpenFlag is a flag for the [VFS.Open] method.
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//
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// https://www.sqlite.org/c3ref/c_open_autoproxy.html
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type OpenFlag uint32
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const (
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OPEN_READONLY OpenFlag = 0x00000001 /* Ok for sqlite3_open_v2() */
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OPEN_READWRITE OpenFlag = 0x00000002 /* Ok for sqlite3_open_v2() */
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OPEN_CREATE OpenFlag = 0x00000004 /* Ok for sqlite3_open_v2() */
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OPEN_DELETEONCLOSE OpenFlag = 0x00000008 /* VFS only */
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OPEN_EXCLUSIVE OpenFlag = 0x00000010 /* VFS only */
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OPEN_AUTOPROXY OpenFlag = 0x00000020 /* VFS only */
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OPEN_URI OpenFlag = 0x00000040 /* Ok for sqlite3_open_v2() */
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OPEN_MEMORY OpenFlag = 0x00000080 /* Ok for sqlite3_open_v2() */
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OPEN_MAIN_DB OpenFlag = 0x00000100 /* VFS only */
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OPEN_TEMP_DB OpenFlag = 0x00000200 /* VFS only */
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OPEN_TRANSIENT_DB OpenFlag = 0x00000400 /* VFS only */
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OPEN_MAIN_JOURNAL OpenFlag = 0x00000800 /* VFS only */
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OPEN_TEMP_JOURNAL OpenFlag = 0x00001000 /* VFS only */
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OPEN_SUBJOURNAL OpenFlag = 0x00002000 /* VFS only */
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OPEN_SUPER_JOURNAL OpenFlag = 0x00004000 /* VFS only */
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OPEN_NOMUTEX OpenFlag = 0x00008000 /* Ok for sqlite3_open_v2() */
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OPEN_FULLMUTEX OpenFlag = 0x00010000 /* Ok for sqlite3_open_v2() */
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OPEN_SHAREDCACHE OpenFlag = 0x00020000 /* Ok for sqlite3_open_v2() */
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OPEN_PRIVATECACHE OpenFlag = 0x00040000 /* Ok for sqlite3_open_v2() */
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OPEN_WAL OpenFlag = 0x00080000 /* VFS only */
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OPEN_NOFOLLOW OpenFlag = 0x01000000 /* Ok for sqlite3_open_v2() */
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)
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// AccessFlag is a flag for the [VFS.Access] method.
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//
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// https://www.sqlite.org/c3ref/c_access_exists.html
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type AccessFlag uint32
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const (
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ACCESS_EXISTS AccessFlag = 0
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ACCESS_READWRITE AccessFlag = 1 /* Used by PRAGMA temp_store_directory */
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ACCESS_READ AccessFlag = 2 /* Unused */
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)
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// SyncFlag is a flag for the [File.Sync] method.
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//
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// https://www.sqlite.org/c3ref/c_sync_dataonly.html
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type SyncFlag uint32
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const (
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SYNC_NORMAL SyncFlag = 0x00002
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SYNC_FULL SyncFlag = 0x00003
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SYNC_DATAONLY SyncFlag = 0x00010
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)
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// LockLevel is a value used with [File.Lock] and [File.Unlock] methods.
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//
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// https://www.sqlite.org/c3ref/c_lock_exclusive.html
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type LockLevel uint32
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const (
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// No locks are held on the database.
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// The database may be neither read nor written.
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// Any internally cached data is considered suspect and subject to
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// verification against the database file before being used.
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// Other processes can read or write the database as their own locking
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// states permit.
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// This is the default state.
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LOCK_NONE LockLevel = 0 /* xUnlock() only */
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// The database may be read but not written.
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// Any number of processes can hold SHARED locks at the same time,
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// hence there can be many simultaneous readers.
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// But no other thread or process is allowed to write to the database file
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// while one or more SHARED locks are active.
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LOCK_SHARED LockLevel = 1 /* xLock() or xUnlock() */
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// A RESERVED lock means that the process is planning on writing to the
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// database file at some point in the future but that it is currently just
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// reading from the file.
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// Only a single RESERVED lock may be active at one time,
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// though multiple SHARED locks can coexist with a single RESERVED lock.
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// RESERVED differs from PENDING in that new SHARED locks can be acquired
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// while there is a RESERVED lock.
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LOCK_RESERVED LockLevel = 2 /* xLock() only */
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// A PENDING lock means that the process holding the lock wants to write to
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// the database as soon as possible and is just waiting on all current
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// SHARED locks to clear so that it can get an EXCLUSIVE lock.
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// No new SHARED locks are permitted against the database if a PENDING lock
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// is active, though existing SHARED locks are allowed to continue.
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LOCK_PENDING LockLevel = 3 /* internal use only */
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// An EXCLUSIVE lock is needed in order to write to the database file.
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// Only one EXCLUSIVE lock is allowed on the file and no other locks of any
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// kind are allowed to coexist with an EXCLUSIVE lock.
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// In order to maximize concurrency, SQLite works to minimize the amount of
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// time that EXCLUSIVE locks are held.
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LOCK_EXCLUSIVE LockLevel = 4 /* xLock() only */
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)
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