mirror of https://github.com/ledisdb/ledisdb.git
66 lines
1.2 KiB
Go
66 lines
1.2 KiB
Go
// +build leveldb
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package leveldb
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// #cgo LDFLAGS: -lleveldb
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// #include "leveldb/c.h"
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import "C"
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import (
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"unsafe"
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)
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type WriteBatch struct {
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db *DB
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wbatch *C.leveldb_writebatch_t
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}
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func (w *WriteBatch) Close() error {
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C.leveldb_writebatch_destroy(w.wbatch)
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w.wbatch = nil
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return nil
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}
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func (w *WriteBatch) Put(key, value []byte) {
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var k, v *C.char
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if len(key) != 0 {
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k = (*C.char)(unsafe.Pointer(&key[0]))
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}
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if len(value) != 0 {
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v = (*C.char)(unsafe.Pointer(&value[0]))
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}
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lenk := len(key)
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lenv := len(value)
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C.leveldb_writebatch_put(w.wbatch, k, C.size_t(lenk), v, C.size_t(lenv))
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}
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func (w *WriteBatch) Delete(key []byte) {
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C.leveldb_writebatch_delete(w.wbatch,
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(*C.char)(unsafe.Pointer(&key[0])), C.size_t(len(key)))
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}
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func (w *WriteBatch) Commit() error {
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return w.commit(w.db.writeOpts)
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}
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func (w *WriteBatch) SyncCommit() error {
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return w.commit(w.db.syncOpts)
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}
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func (w *WriteBatch) Rollback() error {
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C.leveldb_writebatch_clear(w.wbatch)
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return nil
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}
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func (w *WriteBatch) commit(wb *WriteOptions) error {
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var errStr *C.char
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C.leveldb_write(w.db.db, wb.Opt, w.wbatch, &errStr)
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if errStr != nil {
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return saveError(errStr)
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}
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return nil
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}
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