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#
# Version: CPL 1.0/GPL 2.0/LGPL 2.1
#
# The contents of this file are subject to the Common Public
# License Version 1.0 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.eclipse.org/legal/cpl-v10.html
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# Copyright (C) 2008 JRuby project
#
# Alternatively, the contents of this file may be used under the terms of
# either of the GNU General Public License Version 2 or later (the "GPL"),
# or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
# in which case the provisions of the GPL or the LGPL are applicable instead
# of those above. If you wish to allow use of your version of this file only
# under the terms of either the GPL or the LGPL, and not to allow others to
# use your version of this file under the terms of the CPL, indicate your
# decision by deleting the provisions above and replace them with the notice
# and other provisions required by the GPL or the LGPL. If you do not delete
# the provisions above, a recipient may use your version of this file under
# the terms of any one of the CPL, the GPL or the LGPL.
#
# Copyright (c) 2007, 2008 Evan Phoenix
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * Neither the name of the Evan Phoenix nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
require 'rbconfig'
module FFI
# Specialised error classes - delcare before loading all the other classes
class NativeError < LoadError; end
class SignatureError < NativeError; end
class NotFoundError < NativeError
def initialize(function, *libraries)
super("Function '#{function}' not found in [#{libraries[0].nil? ? 'current process' : libraries.join(", ")}]")
end
end
end
require 'ffi-internal.so' # Load the JRuby implementation class
require 'ffi/platform'
require 'ffi/types'
require 'ffi/library'
require 'ffi/memorypointer'
require 'ffi/autopointer'
require 'ffi/struct'
require 'ffi/io'
require 'ffi/variadic'
require 'ffi/errno'
require 'ffi/managedstruct'
require 'ffi/enum'
module FFI
def self.map_library_name(lib)
lib = lib.to_s
# Mangle the library name to reflect the native library naming conventions
lib = Platform::LIBC if lib == 'c'
if lib && File.basename(lib) == lib
ext = ".#{Platform::LIBSUFFIX}"
lib = Platform::LIBPREFIX + lib unless lib =~ /^#{Platform::LIBPREFIX}/
lib += ext unless lib =~ /#{ext}/
end
lib
end
def self.create_invoker(lib, name, args, ret_type, options = { :convention => :default })
# Current artificial limitation based on JRuby::FFI limit
raise SignatureError, 'FFI functions may take max 32 arguments!' if args.size > 32
# Open the library if needed
library = if lib.kind_of?(DynamicLibrary)
lib
elsif lib.kind_of?(String)
# Allow FFI.create_invoker to be called with a library name
DynamicLibrary.open(FFI.map_library_name(lib), DynamicLibrary::RTLD_LAZY)
elsif lib.nil?
FFI::Library::DEFAULT
else
raise LoadError, "Invalid library '#{lib}'"
end
function = library.find_function(name)
raise NotFoundError.new(name, library.name) unless function
args = args.map {|e| find_type(e) }
invoker = if args.length > 0 && args[args.length - 1] == FFI::NativeType::VARARGS
FFI::VariadicInvoker.new(library, function, args, find_type(ret_type), options)
else
FFI::Function.new(find_type(ret_type), args, function, options)
end
raise NotFoundError.new(name, library.name) unless invoker
return invoker
end
# Load all the platform dependent types/consts/struct members
class Config
CONFIG = Hash.new
begin
File.open(File.join(Platform::CONF_DIR, 'platform.conf'), "r") do |f|
typedef = "rbx.platform.typedef."
f.each_line { |line|
if line.index(typedef) == 0
new_type, orig_type = line.chomp.slice(typedef.length..-1).split(/\s*=\s*/)
FFI.add_typedef(orig_type.to_sym, new_type.to_sym)
else
key, value = line.chomp.split(/\s*=\s*/)
CONFIG[String.new << key] = String.new << value unless key.nil? or value.nil?
end
}
end
rescue Errno::ENOENT
end
end
end
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