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Add DL::Importable::Internal::callback().

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2541 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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ttate 2002-06-10 17:47:48 +00:00
parent be87030ea8
commit 5c1bdda10c
1 changed files with 47 additions and 9 deletions
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56
ext/dl/lib/dl/import.rb
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@ -37,10 +37,7 @@ module DL
end
alias dllink :dlload
# example:
# extern "int strlen(char*)"
#
def extern(proto)
def parse_cproto(proto)
proto = proto.gsub(/\s+/, " ").strip
case proto
when /^([\d\w\*_\s]+)\(([\d\w\*_\s\,\[\]]*)\)$/
@ -54,12 +51,52 @@ module DL
ret.push("*")
end
ret = ret.join(" ")
return import(func, ret, args)
return [func, ret, args]
else
raise(RuntimeError,"can't parse the function prototype: #{proto}")
end
end
# example:
# extern "int strlen(char*)"
#
def extern(proto)
func,ret,args = parse_cproto(proto)
return import(func, ret, args)
end
# example:
# callback "int method_name(int, char*)"
#
def callback(proto)
func,ret,args = parse_cproto(proto)
init_types()
init_sym()
rty,_,rdec = @types.encode_type(ret)
ty,enc,dec = encode_types(args)
symty = rty + ty
module_eval("module_function :#{func}")
sym = module_eval [
"DL::callback(\"#{symty}\"){|*args|",
" sym,rdec,enc,dec = @SYM['#{func}']",
" args = enc.call(args) if enc",
" r,rs = #{func}(*args)",
" r = rdec.call(r) if rdec",
" rs = dec.call(rs) if dec",
" @retval = r",
" @args = rs",
" @retval",
"}",
].join("\n")
@SYM[func] = [sym,rdec,enc,dec]
return sym
end
# example:
# typealias("uint", "unsigned int")
#
@ -74,11 +111,12 @@ module DL
def import(name, rettype, argtypes = nil)
init_types()
init_sym()
@LIBS.each{|lib|
rty,_,rdec = @types.encode_type(rettype)
ty,enc,dec = encode_types(argtypes)
symty = rty + ty
rty,_,rdec = @types.encode_type(rettype)
ty,enc,dec = encode_types(argtypes)
symty = rty + ty
@LIBS.each{|lib|
begin
sym = lib[name, symty]
rescue