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pull in ncruces/go-sqlite3 v0.20.3 with tetratelabs/wazero v1.8.2 (#3574)

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kim
2024-11-26 16:25:48 +00:00
committed by GitHub
parent 6a8af42647
commit 61f8f1e0e3
41 changed files with 374 additions and 226 deletions
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25
vendor/github.com/ncruces/go-sqlite3/vfs/os_bsd.go generated vendored
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@ -15,9 +15,15 @@ func osGetSharedLock(file *os.File) _ErrorCode {
func osGetReservedLock(file *os.File) _ErrorCode {
rc := osLock(file, unix.LOCK_EX|unix.LOCK_NB, _IOERR_LOCK)
if rc == _BUSY {
// The documentation states the lock is upgraded by releasing the previous lock,
// then acquiring the new lock.
// This is a race, so return BUSY_SNAPSHOT to ensure the transaction is aborted.
// The documentation states that a lock is upgraded by
// releasing the previous lock, then acquiring the new lock.
// Going over the source code of various BSDs, though,
// with LOCK_NB, the lock is not released,
// and EAGAIN is returned holding the shared lock.
// Still, if we're already in a transaction, we want to abort it,
// so return BUSY_SNAPSHOT here. If there's no transaction active,
// SQLite will change this back to SQLITE_BUSY,
// and invoke the busy handler if appropriate.
return _BUSY_SNAPSHOT
}
return rc
@ -33,9 +39,11 @@ func osGetExclusiveLock(file *os.File, state *LockLevel) _ErrorCode {
func osDowngradeLock(file *os.File, _ LockLevel) _ErrorCode {
rc := osLock(file, unix.LOCK_SH|unix.LOCK_NB, _IOERR_RDLOCK)
if rc == _BUSY {
// The documentation states the lock is upgraded by releasing the previous lock,
// then acquiring the new lock.
// This is a race, so return IOERR_RDLOCK to ensure the transaction is aborted.
// The documentation states that a lock is downgraded by
// releasing the previous lock then acquiring the new lock.
// Going over the source code of various BSDs, though,
// with LOCK_SH|LOCK_NB this should never happen.
// Return IOERR_RDLOCK, as BUSY would cause an assert to fail.
return _IOERR_RDLOCK
}
return _OK
@ -50,7 +58,10 @@ func osReleaseLock(file *os.File, _ LockLevel) _ErrorCode {
}
func osCheckReservedLock(file *os.File) (bool, _ErrorCode) {
// Test the RESERVED lock.
// Test the RESERVED lock with fcntl(F_GETLK).
// This only works on systems where fcntl and flock are compatible.
// However, SQLite only calls this while holding a shared lock,
// so the difference is immaterial.
lock, rc := osTestLock(file, _RESERVED_BYTE, 1)
return lock == unix.F_WRLCK, rc
}