Golang leveldb_writebatch_put Examples

Example #1

File: batch.go Project: andradeandrey/levigo

// Put places a key-value pair into the WriteBatch for writing later.
//
// Both the key and value byte slices may be reused as WriteBatch takes a copy
// of them before returning.
//
func (w *WriteBatch) Put(key, value []byte) {
	// leveldb_writebatch_put, and _delete call memcpy() (by way of
	// Memtable::Add) when called, so we do not need to worry about these
	// []byte being reclaimed by GC.
	C.leveldb_writebatch_put(w.wbatch,
		(*C.char)(unsafe.Pointer(&key[0])), C.size_t(len(key)),
		(*C.char)(unsafe.Pointer(&value[0])), C.size_t(len(value)))
}

Example #2

File: batch.go Project: malloc-fi/vantaa

func (w *WriteBatch) Put(key, value []byte) {
	var k, v *C.char
	if len(key) != 0 {
		k = (*C.char)(unsafe.Pointer(&key[0]))
	}
	if len(value) != 0 {
		v = (*C.char)(unsafe.Pointer(&value[0]))
	}

	lenk := len(key)
	lenv := len(value)

	C.leveldb_writebatch_put(w.wbatch, k, C.size_t(lenk), v, C.size_t(lenv))
}

Example #3

File: batch.go Project: monadbobo/agent_leveldb

func (wb *Writebatch) Put(key, value []byte) error {
	key_len := len(key)
	value_len := len(value)
	if key_len == 0 {
		return ldb_error("key must be not empty")
	}

	if value_len == 0 {
		return ldb_error("value must be not empty")
	}

	key_c := (*C.char)(unsafe.Pointer(&key[0]))
	value_c := (*C.char)(unsafe.Pointer(&value[0]))

	C.leveldb_writebatch_put(wb.wb, key_c, C.size_t(key_len), value_c, C.size_t(value_len))
	return nil
}

Example #4

File: batch.go Project: janelia-flyem/go

// Put places a key-value pair into the WriteBatch for writing later.
//
// Both the key and value byte slices may be reused as WriteBatch takes a copy
// of them before returning.
//
func (w *WriteBatch) Put(key, value []byte) {
	// leveldb_writebatch_put, and _delete call memcpy() (by way of
	// Memtable::Add) when called, so we do not need to worry about these
	// []byte being reclaimed by GC.
	var k, v *C.char
	if len(key) != 0 {
		k = (*C.char)(unsafe.Pointer(&key[0]))
	}
	if len(value) != 0 {
		v = (*C.char)(unsafe.Pointer(&value[0]))
	}

	lenk := len(key)
	lenv := len(value)

	C.leveldb_writebatch_put(w.wbatch, k, C.size_t(lenk), v, C.size_t(lenv))
}