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require 'dl'
require 'dl/callback'
require 'dl/stack'
require 'dl/value'
require 'thread'
module DL
parent = DL.fiddle? ? Fiddle::Function : Object
class Function < parent
include DL
include ValueUtil
def initialize cfunc, argtypes, abi = nil, &block
if DL.fiddle?
abi ||= Fiddle::Function::DEFAULT
if block_given?
@cfunc = Class.new(Fiddle::Closure) {
define_method(:call, block)
}.new(cfunc.ctype, argtypes)
else
@cfunc = cfunc
end
@args = argtypes
super(@cfunc, @args.reject { |x| x == TYPE_VOID }, cfunc.ctype, abi)
else
@cfunc = cfunc
@stack = Stack.new(argtypes.collect{|ty| ty.abs})
if( @cfunc.ctype < 0 )
@cfunc.ctype = @cfunc.ctype.abs
@unsigned = true
else
@unsigned = false
end
if block_given?
bind(&block)
end
end
end
def to_i()
@cfunc.to_i
end
def name
@cfunc.name
end
def call(*args, &block)
if DL.fiddle?
if block_given?
args.find { |a| DL::Function === a }.bind_at_call(&block)
end
super
else
funcs = []
_args = wrap_args(args, @stack.types, funcs, &block)
r = @cfunc.call(@stack.pack(_args))
funcs.each{|f| f.unbind_at_call()}
return wrap_result(r)
end
end
def wrap_result(r)
case @cfunc.ctype
when TYPE_VOIDP
r = CPtr.new(r)
else
if( @unsigned )
r = unsigned_value(r, @cfunc.ctype)
end
end
r
end
def bind(&block)
if DL.fiddle?
@cfunc = Class.new(Fiddle::Closure) {
def initialize ctype, args, block
super(ctype, args)
@block = block
end
def call *args
@block.call(*args)
end
}.new(@cfunc.ctype, @args, block)
else
if( !block )
raise(RuntimeError, "block must be given.")
end
unless block.lambda?
block = Class.new{define_method(:call, block)}.new.method(:call)
end
if( @cfunc.ptr == 0 )
cb = Proc.new{|*args|
ary = @stack.unpack(args)
@stack.types.each_with_index{|ty, idx|
case ty
when TYPE_VOIDP
ary[idx] = CPtr.new(ary[idx])
end
}
r = block.call(*ary)
wrap_arg(r, @cfunc.ctype, [])
}
case @cfunc.calltype
when :cdecl
@cfunc.ptr = set_cdecl_callback(@cfunc.ctype, @stack.size, &cb)
when :stdcall
@cfunc.ptr = set_stdcall_callback(@cfunc.ctype, @stack.size, &cb)
else
raise(RuntimeError, "unsupported calltype: #{@cfunc.calltype}")
end
if( @cfunc.ptr == 0 )
raise(RuntimeException, "can't bind C function.")
end
end
end
end
def unbind()
if( @cfunc.ptr != 0 )
case @cfunc.calltype
when :cdecl
remove_cdecl_callback(@cfunc.ptr, @cfunc.ctype)
when :stdcall
remove_stdcall_callback(@cfunc.ptr, @cfunc.ctype)
else
raise(RuntimeError, "unsupported calltype: #{@cfunc.calltype}")
end
@cfunc.ptr = 0
end
end
def bound?()
@cfunc.ptr != 0
end
def bind_at_call(&block)
bind(&block)
end
def unbind_at_call()
end
end
class TempFunction < Function
def bind_at_call(&block)
bind(&block)
end
def unbind_at_call()
unbind()
end
end
class CarriedFunction < Function
def initialize(cfunc, argtypes, n)
super(cfunc, argtypes)
@carrier = []
@index = n
@mutex = Mutex.new
end
def create_carrier(data)
ary = []
userdata = [ary, data]
@mutex.lock()
@carrier.push(userdata)
return dlwrap(userdata)
end
def bind_at_call(&block)
userdata = @carrier[-1]
userdata[0].push(block)
bind{|*args|
ptr = args[@index]
if( !ptr )
raise(RuntimeError, "The index of userdata should be lower than #{args.size}.")
end
userdata = dlunwrap(Integer(ptr))
args[@index] = userdata[1]
userdata[0][0].call(*args)
}
@mutex.unlock()
end
end
end
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