https://github.com/xiyoo0812/lmdb
lmdb的lua封装库！
https://github.com/xiyoo0812/lmdb
Last synced: 13 days ago
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lmdb的lua封装库！
- Host: GitHub
- URL: https://github.com/xiyoo0812/lmdb
- Owner: xiyoo0812
- License: mit
- Created: 2024-03-07T03:44:02.000Z (about 1 year ago)
- Default Branch: master
- Last Pushed: 2024-12-24T08:55:24.000Z (5 months ago)
- Last Synced: 2025-05-07T08:58:18.717Z (13 days ago)
- Language: C
- Size: 159 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# lmdb
lmdb的lua封装库！
# 依赖
- [lua](https://github.com/xiyoo0812/lua.git)5.2以上
- [luakit](https://github.com/xiyoo0812/luakit.git)一个luabind库
- 项目路径如下
|--proj
|--lua
|--lmdb
|--luakit
# 编译
- msvc: 准备好lua依赖库并放到指定位置，将proj文件加到sln后编译。
- linux: 准备好lua依赖库并放到指定位置，执行make -f lmdb.mak
# 注意事项
- mimalloc: 参考[quanta](https://github.com/xiyoo0812/quanta.git)使用，不用则在工程文件中注释
# 用法
```lua
-- lmdb_test.lua
local log_debug = logger.debug
local jsoncodec = json.jsoncodec
local MDB_CREATE = lmdb.MDB_DBI_FLAG.MDB_CREATE
local MDB_NOSUBDIR = lmdb.MDB_ENV_FLAG.MDB_NOSUBDIR
local MDB_FIRST = lmdb.MDB_CUR_OP.MDB_FIRST
local MDB_NEXT = lmdb.MDB_CUR_OP.MDB_NEXT
local MDB_SET = lmdb.MDB_CUR_OP.MDB_SET
local driver = lmdb.create()
local jcodec = jsoncodec()
driver.set_max_dbs(10)
driver.set_codec(jcodec)
driver.open("./lmdb/xxx.mdb", MDB_NOSUBDIR, 0644)
driver.begin_txn("test", MDB_CREATE)
local a = driver.put("abc1", {a=123})
local b = driver.put("abc2", "234")
local c = driver.put("abc3", "235")
local d = driver.put("abc4", "236")
log_debug("put: {}-{}-{}-{}", a, b, c, d)
driver.commit_txn()
driver.begin_txn("test")
for i = 1, 6 do
local da,rc = driver.get("abc" .. i)
log_debug("get-{}: {}-{}", i, da,rc)
end
driver.commit_txn()
driver.cursor_open("test")
local r, k, v = driver.cursor_get("abc1", MDB_SET )
while v do
log_debug("cursor: {}={}->{}", k, v, r)
r, k, v = driver.cursor_get(0, MDB_NEXT )
end
driver.cursor_close()
a = driver.quick_put("abc4", {a=234}, "test")
b = driver.quick_put("abc5", "235", "test")
log_debug("quick_put: {}-{}", a, b)
for i = 1, 6 do
local da,rc = driver.quick_get("abc" .. i, "test")
log_debug("quick_get-{}: {}-{}", i, da,rc)
end
b = driver.quick_del("abc4", "test")
a = driver.quick_del("abc5", "test")
log_debug("quick_del: {}-{}", a, b)
for i = 1, 6 do
local da,rc = driver.quick_get("abc" .. i, "test")
log_debug("quick_del_get-{}: {}-{}", i, da,rc)
end
local objects = { a = true, b = 3, c = 3 }
local s = driver.batch_put(objects, "test")
log_debug("batch_put: {}", s)
local x = driver.batch_get({"a", "b", "c", "d"}, "test")
log_debug("batch_get: {}", x)
local g = driver.batch_del({"a", "b", "c", "d"}, "test")
log_debug("batch_del: {}", g)
local y = driver.batch_get({"a", "b", "c", "d"}, "test")
log_debug("batch_get: {}", y)
local dp = driver.quick_drop("test", true)
log_debug("quick_drop: {}", dp)
driver.cursor_open("test")
r, k, v = driver.cursor_get("abc1", MDB_FIRST )
while v do
log_debug("cursor2: {}={}->{}", k, v, r)
r, k, v = driver.cursor_get(0, MDB_NEXT )
end
driver.cursor_close()
```