用C写自己的ruby类库 下载ruby源码: linux: apt-get install ruby1.9.1-dev .最简单.
windows: http://www.ruby-lang.org/zh_cn/downloads/ , 添加 include 和 lib 的环境变量.
编辑MyTest/MyTest.c :
C代码
// Include the Ruby headers and goodies  
#include "ruby.h"  
  
// Defining a space for information and references about the module to be stored internally  
VALUE MyTest = Qnil;  
  
// Prototype for the initialization method - Ruby calls this, not you  
void Init_mytest();  
  
// Prototype for our method 'test1' - methods are prefixed by 'method_' here  
VALUE method_test1(VALUE self);  
  
// The initialization method for this module  
void Init_mytest() {  
   MyTest = rb_define_module("MyTest");  
   rb_define_method(MyTest, "test1", method_test1, 0);     
}  
  
// Our 'test1' method.. it simply returns a value of '10' for now.  
VALUE method_test1(VALUE self) {  
   int x = 10;  
   return INT2NUM(x);  
}   
编辑 MyTest/extconf.rb :
Ruby代码
# Loads mkmf which is used to make makefiles for Ruby extensions  
require 'mkmf'  
  
# Give it a name  
extension_name = 'mytest'  
  
# The destination  
dir_config(extension_name)  
  
# Do the work  
create_makefile(extension_name)  
运行 kk@ubuntu:~/MyTest$ ruby extconf.rb
creating Makefile
运行 kk@ubuntu:~/MyTest$ make
gcc -I. -I/usr/include/ruby-1.9.1/i486-linux -I/usr/include/ruby-1.9.1/ruby/backward -I/usr/include/ruby-1.9.1 -I. -D_FILE_OFFSET_BITS=64 -fPIC -fno-strict-aliasing -g -g -O2 -O2 -g -Wall -Wno-parentheses -fPIC -o test.o -c test.c
gcc -shared -o mytest.so test.o -L. -L/usr/lib -L. -Wl,-Bsymbolic-functions -rdynamic -Wl,-export-dynamic -lruby-1.9.1 -lpthread -lrt -ldl -lcrypt -lm -lc
当前目录生成了 mytest.so 文件
这个 mytest.so 就可以用 ruby load 或 require 了.
Ruby代码
require 'mytest' ; include MyTest ; puts test1   
输出 => 10   
Ruby代码
# Load in the extension (on OS X this loads ./MyTest/mytest.bundle - unsure about Linux, possibly mytest.so)  
require 'mytest'  
  
# MyTest is now a module, so we need to include it  
include MyTest  
  
# Call and print the result from the test1 method  
puts test1  
  
# => 10