add sharemap , an example of stm

lualib-src/lua-stm.c

@@ -3,6 +3,7 @@
 #include <stdlib.h>
 #include <stdint.h>
 #include <assert.h>
+#include <string.h>
 
 #include "rwlock.h"
 #include "skynet_malloc.h"
@@ -126,8 +127,16 @@ lcopy(lua_State *L) {
 
 static int
 lnewwriter(lua_State *L) {
-	void * msg = lua_touserdata(L, 1);
-	uint32_t sz = (uint32_t)luaL_checkinteger(L, 2);
+	void * msg;
+	size_t sz;
+	if (lua_isuserdata(L,1)) {
+		msg = lua_touserdata(L, 1);
+		sz = (size_t)luaL_checkinteger(L, 2);
+	} else {
+		const char * tmp = luaL_checklstring(L,1,&sz);
+		msg = skynet_malloc(sz);
+		memcpy(msg, tmp, sz);
+	}
 	struct boxstm * box = lua_newuserdata(L, sizeof(*box));
 	box->obj = stm_new(msg,sz);
 	lua_pushvalue(L, lua_upvalueindex(1));
@@ -148,8 +157,16 @@ ldeletewriter(lua_State *L) {
 static int
 lupdate(lua_State *L) {
 	struct boxstm * box = lua_touserdata(L, 1);
-	void * msg = lua_touserdata(L, 2);
-	uint32_t sz = (uint32_t)luaL_checkinteger(L, 3);
+	void * msg;
+	size_t sz;
+	if (lua_isuserdata(L, 2)) {
+		msg = lua_touserdata(L, 2);
+		sz = (size_t)luaL_checkinteger(L, 3);
+	} else {
+		const char * tmp = luaL_checklstring(L,2,&sz);
+		msg = skynet_malloc(sz);
+		memcpy(msg, tmp, sz);
+	}
 	stm_update(box->obj, msg, sz);
 
 	return 0;
@@ -186,6 +203,7 @@ static int
 lread(lua_State *L) {
 	struct boxreader * box = lua_touserdata(L, 1);
 	luaL_checktype(L, 2, LUA_TFUNCTION);
+
 	struct stm_copy * copy = stm_copy(box->obj);
 	if (copy == box->lastcopy) {
 		// not update
@@ -197,10 +215,13 @@ lread(lua_State *L) {
 	stm_releasecopy(box->lastcopy);
 	box->lastcopy = copy;
 	if (copy) {
+		lua_settop(L, 3);
+		lua_replace(L, 1);
 		lua_settop(L, 2);
 		lua_pushlightuserdata(L, copy->msg);
 		lua_pushinteger(L, copy->sz);
-		lua_call(L, 2, LUA_MULTRET);
+		lua_pushvalue(L, 1);
+		lua_call(L, 3, LUA_MULTRET);
 		lua_pushboolean(L, 1);
 		lua_replace(L, 1);
 		return lua_gettop(L);

lualib/sharemap.lua

@@ -0,0 +1,69 @@
+local stm = require "stm"
+local sprotoloader = require "sprotoloader"
+local sproto = require "sproto"
+local setmetatable = setmetatable
+
+local sharemap = {}
+
+function sharemap.register(protofile)
+	-- use global slot 0 for type define
+	sprotoloader.register(protofile, 0)
+end
+
+local sprotoobj
+local function loadsp()
+	if sprotoobj == nil then
+		sprotoobj = sprotoloader.load(0)
+	end
+	return sprotoobj
+end
+
+function sharemap:commit()
+	self.__obj(sprotoobj:encode(self.__typename, self.__data))
+end
+
+function sharemap:copy()
+	return stm.copy(self.__obj)
+end
+
+function sharemap.writer(typename, obj)
+	local sp = loadsp()
+	obj = obj or {}
+	local stmobj = stm.new(sp:encode(typename,obj))
+	obj.__typename = typename
+	obj.__obj = stmobj
+	obj.__data = obj
+	obj.commit = sharemap.commit
+	obj.copy = sharemap.copy
+	return setmetatable(obj, { __index = obj.__data, __newindex = obj.__data })
+end
+
+local function decode(msg, sz, self)
+	local data = self.__data
+	for k in pairs(data) do
+		data[k] = nil
+	end
+	return sprotoobj:decode(self.__typename, msg, sz, data)
+end
+
+function sharemap:update()
+	return self.__obj(decode, self)
+end
+
+function sharemap.reader(typename, stmcpy)
+	local sp = loadsp()
+	local stmobj = stm.newcopy(stmcpy)
+	local _, data = stmobj(function(msg, sz)
+		return sp:decode(typename, msg, sz)
+	end)
+
+	local obj = {
+		__typename = typename,
+		__obj = stmobj,
+		__data = data,
+		update = sharemap.update,
+	}
+	return setmetatable(obj, { __index = obj.__data, __newindex = error })
+end
+
+return sharemap

lualib/sproto.lua

@@ -53,9 +53,9 @@ function sproto:encode(typename, tbl)
 	return core.encode(st, tbl)
 end
 
-function sproto:decode(typename, bin)
+function sproto:decode(typename, ...)
 	local st = querytype(self, typename)
-	return core.decode(st, bin)
+	return core.decode(st, ...)
 end
 
 function sproto:pencode(typename, tbl)

test/sharemap.sp

@@ -0,0 +1,5 @@
+.foobar {
+	x 0 : integer
+	y 1 : integer
+	s 2 : string
+}

test/testsm.lua

@@ -0,0 +1,48 @@
+local skynet = require "skynet"
+local sharemap = require "sharemap"
+
+local mode = ...
+
+if mode == "slave" then
+--slave
+
+local function dump(reader)
+	reader:update()
+	print("x=", reader.x)
+	print("y=", reader.y)
+	print("s=", reader.s)
+end
+
+skynet.start(function()
+	local reader
+	skynet.dispatch("lua", function(_,_,cmd,...)
+		if cmd == "init" then
+			reader = sharemap.reader(...)
+		else
+			assert(cmd == "ping")
+			dump(reader)
+		end
+		skynet.ret()
+	end)
+end)
+
+else
+-- master
+skynet.start(function()
+	-- register share type schema
+	sharemap.register("./test/sharemap.sp")
+	local slave = skynet.newservice(SERVICE_NAME, "slave")
+	local writer = sharemap.writer("foobar", { x=0,y=0,s="hello" })
+	skynet.call(slave, "lua", "init", "foobar", writer:copy())
+	writer.x = 1
+	writer:commit()
+	skynet.call(slave, "lua", "ping")
+	writer.y = 2
+	writer:commit()
+	skynet.call(slave, "lua", "ping")
+	writer.s = "world"
+	writer:commit()
+	skynet.call(slave, "lua", "ping")
+end)
+
+end