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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2374 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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ttate 2002-04-14 17:19:44 +00:00
parent 66484faf1b
commit cb944528b6
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16
ext/dl/doc/dl.txt
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@ -17,8 +17,8 @@ and LoadLibrary() on Windows.
= Using Ruby/DL
We should usually use DL::Importable module provided by dl/import.rb.
It has high-level functions to access to library functions. We use
We should usually use DL::Importable module provided by "dl/import.rb".
It has high-level functions to access library functions. We use
DL::Importable module to extend a module as follows:
require "dl/import"
@ -26,22 +26,22 @@ DL::Importable module to extend a module as follows:
extend DL::Importable
end
Now we can use methods dlload() and extern() in this module. We load the
libraries using dlload(), and define wrapper methods to library functions
using extern() respectively as follows:
Now we can use methods dlload and extern in this module. We load the
libraries using dlload, and define wrapper methods to library functions
using extern respectively as follows:
module LIBC
extend DL::Importable
dlload "libc.so.6","libm.so.6"
extern "int strlen(char*)"
end
# Note that we should not include the module LIBC from some reason.
Note that we should not include the module LIBC from some reason.
We can call the library function strlen() using LIBC.strlen(). If the first
We can call the library function strlen() using LIBC.strlen. If the first
character of given function name is an uppercase, the first character of the
defined method name becomes lowercase.
We can also construct memory images of structures and unions using functions
struct and union which are defined in dl/struct.rb as follows:
struct and union which are defined in "dl/struct.rb" as follows:
require "dl/import"
require "dl/struct"