Enable Lumen multitasking framework on TS-7260 board

Lumen is a Lua-based framework to develop portable multitasking applications. It is very simple, consists just a scheduler that manage Lua coroutines to achieve multitasking, and no C code involved. I would like to use it on my TS-7260 board, after having enable Lua scripting on it (see my previous blog Enable Lua scripting on TS-7260 board).

I used the followings steps to try Lumen on my TS-7260 board:

1. Obtained latest Lumen code from GitHub into my desktop PC.
2. Tried running the test program tests/test.lua on my desktop PC, which also has Lua 5.2.1 installed. $ cd tests $ lua test.lua A says: going to sleep couple seconds B says: A found at task: A B says: waiting for a 'die' from A 0 says: waiting for a 'ev' from A $ The test program terminated prematurely. I later found out that the following modification (in function M.idle, in file sched.lua) is needed, if os.execute('sleep '..t) ~= 0 then os.exit() end has to be changed to if os.execute('sleep '..t) ~= true then os.exit() end After this change, the test program ran and terminated properly, as shown below: $ lua test.lua A says: going to sleep couple seconds B says: A found at task: A B says: waiting for a 'die' from A 0 says: waiting for a 'ev' from A A says: emittig 'ev, data!' 0 says: received a 'ev' from A, with a data! 0 says: going to kill A B says: received a 'die' from A B says: going to error with message 'xxx' 0 says: finishing, returning data! A says: finishing
3. Lumen has a shell task that depends on NIXIO for telnet access. Next, I obtained the latest NIXIO code and cross-compiled it for TS-LINUX, as shown below:
1. Added the following code into NIXIO main makefile:
ifeq ($(OS),TS-LINUX) NIXIO_CROSS_CC := /opt/crosstool/arm-unknown-linux-gnu/gcc-3.3.2-glibc-2.3.2/bin/arm-unknown-linux-gnu-gcc CC := $(NIXIO_CROSS_CC) NIXIO_LDFLAGS_POST := -L /opt/crosstool/arm-unknown-linux-gnu/gcc-3.3.2-glibc-2.3.2/lib -llua -lcrypt NIXIO_CFLAGS += -DNO_TLS -I /opt/crosstool/arm-unknown-linux-gnu/gcc-3.3.2-glibc-2.3.2/arm-unknown-linux-gnu/include -I /usr/local/include FPIC:= LUA_CFLAGS:= NIXIO_SO := nixio.so NIXIO_LDFLAGS:= NIXIO_TLS:= endif
2. Replaced all reference to luaL_reg with luaL_Reg in NIXIO C files
$ cd src $ sed -i "s/\bluaL_reg\b/luaL_Reg/g" *.c
3. Built C module of NIXIO (nixio.so) as below: cd .. make OS=TS-LINUX CFLAGS+=-DLUA_COMPAT_ALL
4. Copied files fs.lua and util.lua in directory lua/nixio to TS-7260 board, placed it under directory /root/nixio.
5. Copied file nixio.so to TS-7260 board, placed it under directory /root/nixio. Enabled executable permission (chmod +x) to it.
4. Copied Lumen files to TS-7260 board, place them under directory /root/Lumen.
5. Set environment variables LUA_PATH and LUA_CPATH as below:
export LUA_PATH="?;?.lua;../?.lua;/root/?.lua" export LUA_CPATH="./?.so;/root/nixio/?.so"
6. Tried running the test program tests/test.lua on TS-7260 board: $ cd Lumen/tests $ lua test.lua and got the same result as in step 2 above. So, Lumen has just worked on TS-7260 board.
7. Tried starting the shell task of Lumen on TS-7260 board, which was listening to port 2012 for telnet access: $ cd Lumen/tasks $ lua Lua 5.2.1 Copyright (C) 1994-2012 Lua.org, PUC-Rio > sched=require "sched" > shell=require "shell" > shell.init("127.0.0.1", 2012) > sched.go() From a desktop PC, telnet to the shell task as below: $ telnet 192.168.2.40 2012 Trying 192.168.2.40... Connected to 192.168.2.40. Escape character is '^]'. Welcome to Toribio Shell > print("Hello, Lumen") Hello, Lumen > I am now able to remotely run Lua codes via the shell task.