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More VFS API.

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Nuno Cruces
2023-09-21 02:43:45 +01:00
parent f5614bc2ed
commit e66bd51845
2 changed files with 21 additions and 6 deletions
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21
vfs/api.go
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@@ -47,7 +47,7 @@ type File interface {
// FileLockState extends File to implement the
// SQLITE_FCNTL_LOCKSTATE file control opcode.
//
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntllockstate
type FileLockState interface {
File
LockState() LockLevel
@@ -56,7 +56,7 @@ type FileLockState interface {
// FileSizeHint extends File to implement the
// SQLITE_FCNTL_SIZE_HINT file control opcode.
//
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlsizehint
type FileSizeHint interface {
File
SizeHint(size int64) error
@@ -65,16 +65,25 @@ type FileSizeHint interface {
// FileHasMoved extends File to implement the
// SQLITE_FCNTL_HAS_MOVED file control opcode.
//
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlhasmoved
type FileHasMoved interface {
File
HasMoved() (bool, error)
}
// FileOverwrite extends File to implement the
// SQLITE_FCNTL_OVERWRITE file control opcode.
//
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntloverwrite
type FileOverwrite interface {
File
Overwrite() error
}
// FilePowersafeOverwrite extends File to implement the
// SQLITE_FCNTL_POWERSAFE_OVERWRITE file control opcode.
//
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlpowersafeoverwrite
type FilePowersafeOverwrite interface {
File
PowersafeOverwrite() bool
@@ -84,7 +93,7 @@ type FilePowersafeOverwrite interface {
// FilePowersafeOverwrite extends File to implement the
// SQLITE_FCNTL_COMMIT_PHASETWO file control opcode.
//
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlcommitphasetwo
type FileCommitPhaseTwo interface {
File
CommitPhaseTwo() error
@@ -94,7 +103,7 @@ type FileCommitPhaseTwo interface {
// SQLITE_FCNTL_BEGIN_ATOMIC_WRITE, SQLITE_FCNTL_COMMIT_ATOMIC_WRITE
// and SQLITE_FCNTL_ROLLBACK_ATOMIC_WRITE file control opcodes.
//
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html
// https://www.sqlite.org/c3ref/c_fcntl_begin_atomic_write.html#sqlitefcntlbeginatomicwrite
type FileBatchAtomicWrite interface {
File
BeginAtomicWrite() error

6
vfs/vfs.go
View File

@@ -309,6 +309,12 @@ func vfsFileControl(ctx context.Context, mod api.Module, pFile uint32, op _Fcntl
return vfsErrorCode(err, _IOERR_FSTAT)
}
case _FCNTL_OVERWRITE:
if file, ok := file.(FileOverwrite); ok {
err := file.Overwrite()
return vfsErrorCode(err, _IOERR)
}
case _FCNTL_COMMIT_PHASETWO:
if file, ok := file.(FileCommitPhaseTwo); ok {
err := file.CommitPhaseTwo()