luajit | 易学教程

3.luajit简介

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--------------------- luajit环境 openresty使用的解释器不是官方的lua解释器，而是第三方的luajit，为的是追求极致的性能 luajit=汇编编写的解释器+jit编译器基于lua5.1 goto for i=1,10 do if i%2==0 then goto continue end print("i=",i) ::continue:: end jit库包含了环境相关的信息 jit.version version_num os arch status table库 new clear clone bit库 ffi库可以调用系统函数和openresty的内部c函数还可以加载so形式的动态库调用动态库的函数。来源： CSDN 作者： peace&love9 链接： https://blog.csdn.net/Edu_enth/article/details/103457829

How to install luarocks packages without internet?

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问题 I used torch distro repository on github and installed LuaJIT and luarocks. I want to install luarocks packages , from source, that is downloading the packages(.zip files) and building them from source . I tried doing it by downloading the packages from github and then running luarocks install modulename.rockspec . But here it again starts cloning from github. Can anyone tell me the exact procedure to do this ? 回答1: You can use either source rocks or binary rocks. Using source rocks A source

How can I detect at runtime if I am running Luajit or PUC Lua 5.1?

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问题 I am writing some test scripts for my Lua project and I want to be sure that they run correctly under the different Lua versions available. Since my unit testing framework can use the wrong Lua version if I misconfigure it, I would like to be extra safe and check at runtime what Lua version my tests are running under. What would be the best way to do that? I know that a quick way to tell 5.1 and 5.2 apart is to check the _VERSION global but how can I tell regular Lua 5.1 and LuaJIT apart? 回答1

C++ and Lua5.1-2 / LuaJIT

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问题 So I'm working on embedding Lua5.1-2 using LuaJIT in a C++ application and included the ability for lua scripts to "subscribe" to events raised in the C++ code and successfully stored the function reference using luaL_ref and successfully called the function using lua_rawgeti and lua_pcall. The problem is that after about ~1500 calls to the function the application crashes with no exception thrown. Out of curiosity I decided to monitor the stack before and after calls to the lua function and

Torch Cuda - Generates two processes on both GPU cores

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问题 When I run; require 'cutorch' in lua it automatically allocates two processes to two of the cores in my GPU. For example I get the following output in nvidia-smi ; ---------------------------------------------------------------------------+ | Processes: GPU Memory | | GPU PID Type Process name Usage | |=============================================================================| | 0 Not Supported | | 1 6091 C /home/msmith/torch/install/bin/qlua 98MiB | | 2 6091 C /home/msmith/torch/install

Luajit: compiling bytecode into object format

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问题 The Luajit manual about the -b option says: The output file type is auto-detected from the extension of the output file name: c — C source file, exported bytecode data. h — C header file, static bytecode data. obj or o — Object file, exported bytecode data (OS- and architecture-specific). raw or any other extension — Raw bytecode file (portable). What does it mean to compile it to object file ? I know it produces a file which then can be linked with other object files generated from C or C++

How can I list modules and check functions exist at the command line?

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问题 Like many "(windows) users" I do not want to spend time learning to compile anything from source. So Lua seems a very good choice for a hobbyist. Sorry if this is a very simple problem - but... Q1. How can I list the modules available to any given instance of the interpreter? Some binary distros have a number of modules compiled as DLLs, and some have them added into the main EXE. It would be nice to know which modules are built in to the EXE, and check the cpath is finding any other DLL

Building openresty1.7.10.1 with luajit on windows

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Building openresty1.7.10.1 with luajit on windows using Cygwin, 在windows下用Cygwin下编译带Luajit的openresty 2013-11-27 15:39 815人阅读评论 (0) 收藏举报（heeroz原创）First install 32bit cygwin. Install packet: openssl zlib-dev pcre gcc-core perl readline openresty没有对Cygwin做兼容，我们需要自己来修改文件 Open bundle\lua-cjson and lua-rds-parser and lua-redis-parser three folder's Makefile for edit, Add those lines before “## ..... (Macports)” bundle\lua-cjson的，lua-rds-parser的，lua-redis-parser的Makefile里，“## ***OSX (Macports)”上面加入： [plain] view plain copy ifeq ($(OS),Windows_NT) LDFLAGS2 += -L../luajit-root/usr/local/openresty

安装 LuaJIT

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wget http://luajit.org/download/LuaJIT-2.0.5.tar.gz tar xzvf LuaJIT-2.0.5.tar.gz cd LuaJIT-2.0.5 mkdir ~/luajit2 make prefix=/home/wang/luajit2 sudo make install luajit -v #Successfully LuaJIT 2.0.5 -- Copyright (C) 2005-2017 Mike Pall. http://luajit.org/ 来源： CSDN 作者：明珠师兄链接： https://blog.csdn.net/qq_21489189/article/details/103463343

【几维安全】lua脚本加密，lua代码加密使用说明

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概述 xLua加密工具主要是一款Lua安全编译器，配置好xLua环境后，用几维提供的libluajit.a替换对应的默认文件，来实现对Lua文件的加密，加密后的Lua文件只能由几维提供的lua bytecode解释器解析，从而避免Lua文件被逆向分析，达到保护Lua核心代码的目的。集成 1、获取xLua 从官方下载对应的xLua版本，默认是master分支 1)这个步骤是属于开发环节，请自行下载并部署好【xLua是开源项目，请自行检测环境变量、Lua和Luajit的版本，以便顺利编译通过】 2)Luajit-2.1.0-beta2以上版本支持64位，几维编译器版本的luajit加密方案基于Luajit-2.1.0-beta2 2、Android快速集成加密版静态库 1）执行build目录下的make_android_luajit.sh(根据自己的平台选择编译脚本)，确保原始的编译成功 2）编译成功之后查看luajit源码目录下src/libluajit.a文件 3）用几维提供的libluajit.a进行替换，x86对应x86，armeabi-v7a对应armeabi-v7a 4）修改make_android_luajit.sh文件，编译armeabi-v7a版本的libxlua.so，如下图 5）同理修改编译出x86版本的libxlua.so 6）复制编译好的libxlua