compiler: the type poset contains only directed casts
[nit.git] / src / compiler / compiler_ffi.nit
index 331955e..b6cb920 100644 (file)
@@ -18,7 +18,7 @@
 module compiler_ffi
 
 intrude import abstract_compiler
-intrude import common_ffi
+intrude import ffi
 import nitni
 
 redef class MModule
@@ -53,7 +53,9 @@ extern void nitni_global_ref_decr(void*);
                nitni_ccu.write_as_nitni(self, v.compiler.modelbuilder.compile_dir)
 
                for file in nitni_ccu.files do
-                       v.compiler.extern_bodies.add(new ExternCFile(file, c_compiler_options))
+                       var f = new ExternCFile(file, c_compiler_options)
+                       f.pkgconfigs.add_all pkgconfigs
+                       v.compiler.extern_bodies.add(f)
                end
 
                # reset FFI things so the next compilation job, if any, starts with a clean context
@@ -82,7 +84,7 @@ extern void nitni_global_ref_decr(void*);
                return res
        end
 
-       private var compiled_callbacks: Array[NitniCallback] = new Array[NitniCallback]
+       private var compiled_callbacks = new Array[NitniCallback]
 
        # Returns true if callbacks has yet to be generated and register it as being generated
        private fun check_callback_compilation(cb: NitniCallback): Bool
@@ -98,7 +100,6 @@ redef class AMethPropdef
        do
                var mmodule = mpropdef.mclassdef.mmodule
                var mainmodule = v.compiler.mainmodule
-               var amainmodule = v.compiler.modelbuilder.mmodule2nmodule[mainmodule]
                var amodule = v.compiler.modelbuilder.mmodule2nmodule[mmodule]
                var mclass_type = mpropdef.mclassdef.bound_mtype
 
@@ -119,21 +120,21 @@ redef class AMethPropdef
                                mtype.compile_extern_type(v, ccu)
 
                                # has callbacks already been compiled? (this may very well happen with global compilation)
-                               if mmodule.check_callback_compilation(mtype) then mtype.compile_extern_helper_functions(v, ccu)
+                               mtype.compile_extern_helper_functions(v, ccu, mmodule.check_callback_compilation(mtype))
                        end
                end
 
                # compile callbacks
-               for cb in foreign_callbacks.callbacks do if mainmodule.check_callback_compilation(cb) then
-                       cb.compile_extern_callback(v, ccu)
+               for cb in foreign_callbacks.callbacks do
+                       cb.compile_extern_callback(v, ccu, mainmodule.check_callback_compilation(cb))
                end
 
-               for cb in foreign_callbacks.supers do if mainmodule.check_callback_compilation(cb) then
-                       cb.compile_extern_callback(v, ccu)
+               for cb in foreign_callbacks.supers do
+                       cb.compile_extern_callback(v, ccu, mainmodule.check_callback_compilation(cb))
                end
 
-               for cb in foreign_callbacks.casts do if mainmodule.check_callback_compilation(cb) then
-                       cb.compile_extern_callbacks(v, ccu)
+               for cb in foreign_callbacks.casts do
+                       cb.compile_extern_callbacks(v, ccu, mainmodule.check_callback_compilation(cb))
                end
 
                # manage nitni callback set
@@ -311,7 +312,7 @@ redef class MType
                ccu.header_c_types.add("#endif\n")
        end
 
-       private fun compile_extern_helper_functions(v: AbstractCompilerVisitor, ccu: CCompilationUnit)
+       private fun compile_extern_helper_functions(v: AbstractCompilerVisitor, ccu: CCompilationUnit, compile_implementation_too: Bool)
        do
                # actually, we do not need to do anything when using the bohem garbage collector
                var call_context = from_c_call_context
@@ -329,7 +330,7 @@ redef class MType
 end
 
 redef class MNullableType
-       redef fun compile_extern_helper_functions(v, ccu)
+       redef fun compile_extern_helper_functions(v, ccu, compile_implementation_too)
        do
                super
 
@@ -343,6 +344,8 @@ redef class MNullableType
                # In nitni files, #define friendly as extern
                ccu.header_decl.add("#define {base_cname} {full_cname}\n")
 
+               if not compile_implementation_too then return
+
                # FIXME: This is ugly an broke the separate compilation principle
                # The real function MUST be compiled only once, #define pragma only protect the compiler, not the loader
                # However, I am not sure of the right approach here (eg. week refs are ugly)
@@ -363,7 +366,7 @@ redef class MNullableType
 end
 
 redef class MExplicitCall
-       private fun compile_extern_callback(v: AbstractCompilerVisitor, ccu: CCompilationUnit)
+       private fun compile_extern_callback(v: AbstractCompilerVisitor, ccu: CCompilationUnit, compile_implementation_too: Bool)
        do
                var mproperty = mproperty
                assert mproperty isa MMethod
@@ -372,6 +375,8 @@ redef class MExplicitCall
                var full_friendly_csignature = mproperty.build_csignature(recv_mtype, v.compiler.mainmodule, null, long_signature, internal_call_context)
                ccu.header_decl.add("extern {full_friendly_csignature};\n")
 
+               if not compile_implementation_too then return
+
                # Internally, implement internal function
                var nitni_visitor = v.compiler.new_visitor
                nitni_visitor.frame = v.frame
@@ -423,12 +428,11 @@ redef class MExplicitCall
 end
 
 redef class MExplicitSuper
-       private fun compile_extern_callback(v: AbstractCompilerVisitor, ccu: CCompilationUnit)
+       private fun compile_extern_callback(v: AbstractCompilerVisitor, ccu: CCompilationUnit, compile_implementation_too: Bool)
        do
                var mproperty = from.mproperty
                assert mproperty isa MMethod
                var mclass_type = from.mclassdef.mclass.mclass_type
-               var mmodule = from.mclassdef.mmodule
 
                # In nitni files, declare internal function as extern
                var internal_csignature = mproperty.build_csignature(mclass_type, v.compiler.mainmodule, "___super", long_signature, internal_call_context)
@@ -439,6 +443,8 @@ redef class MExplicitSuper
                var internal_cname = mproperty.build_cname(mclass_type, v.compiler.mainmodule, "___super", long_signature)
                ccu.header_decl.add("#define {friendly_cname} {internal_cname}\n")
 
+               if not compile_implementation_too then return
+
                # Internally, implement internal function
                var nitni_visitor = v.compiler.new_visitor
                nitni_visitor.frame = v.frame
@@ -477,7 +483,7 @@ redef class MExplicitSuper
 end
 
 redef class MExplicitCast
-       private fun compile_extern_callbacks(v: AbstractCompilerVisitor, ccu: CCompilationUnit)
+       private fun compile_extern_callbacks(v: AbstractCompilerVisitor, ccu: CCompilationUnit, compile_implementation_too: Bool)
        do
                var from = from
                var to = to
@@ -493,22 +499,23 @@ redef class MExplicitCast
                # In nitni files, #define friendly as extern
                ccu.header_decl.add("#define {check_cname} {v.compiler.mainmodule.name}___{check_cname}\n")
 
-               # Internally, implement internal function
-               var nitni_visitor = v.compiler.new_visitor
-               nitni_visitor.frame = v.frame
+               if compile_implementation_too then
+                       # Internally, implement internal function
+                       var nitni_visitor = v.compiler.new_visitor
+                       nitni_visitor.frame = v.frame
 
-               var full_internal_csignature = "int {v.compiler.mainmodule.name }___{from.mangled_cname}_is_a_{to.mangled_cname}({internal_call_context.name_mtype(from)} from)"
+                       var full_internal_csignature = "int {v.compiler.mainmodule.name }___{from.mangled_cname}_is_a_{to.mangled_cname}({internal_call_context.name_mtype(from)} from)"
 
-               nitni_visitor.add_decl("/* nitni check for {from} to {to} */")
-               nitni_visitor.add_decl("{full_internal_csignature} \{")
+                       nitni_visitor.add_decl("/* nitni check for {from} to {to} */")
+                       nitni_visitor.add_decl("{full_internal_csignature} \{")
 
-               #var from_var = new RuntimeVariable("from->value", from, from)
-               var from_var = nitni_visitor.var_from_c("from", from)
-               from_var = nitni_visitor.box_extern(from_var, from)
-               var recv_var = nitni_visitor.type_test(from_var, to, "FFI isa")
-               nitni_visitor.add("return {recv_var};")
+                       var from_var = nitni_visitor.var_from_c("from", from)
+                       from_var = nitni_visitor.box_extern(from_var, from)
+                       var recv_var = nitni_visitor.type_test(from_var, to, "FFI isa")
+                       nitni_visitor.add("return {recv_var};")
 
-               nitni_visitor.add("\}")
+                       nitni_visitor.add("\}")
+               end
 
                # special checks
                if from == to.as_nullable then
@@ -527,30 +534,32 @@ redef class MExplicitCast
                # In nitni files, #define friendly as extern
                ccu.header_decl.add("#define {cast_cname} {v.compiler.mainmodule.name}___{cast_cname}\n")
 
-               # Internally, implement internal function
-               nitni_visitor = v.compiler.new_visitor
-               nitni_visitor.frame = v.frame
+               if compile_implementation_too then
+                       # Internally, implement internal function
+                       var nitni_visitor = v.compiler.new_visitor
+                       nitni_visitor.frame = v.frame
 
-               full_internal_csignature = "{to.cname_blind} {v.compiler.mainmodule.name }___{from.mangled_cname}_as_{to.mangled_cname}({internal_call_context.name_mtype(from)} from)"
-               nitni_visitor.add_decl("/* nitni cast for {from} to {to} */")
-               nitni_visitor.add_decl("{full_internal_csignature} \{")
+                       var full_internal_csignature = "{to.cname_blind} {v.compiler.mainmodule.name }___{from.mangled_cname}_as_{to.mangled_cname}({internal_call_context.name_mtype(from)} from)"
+                       nitni_visitor.add_decl("/* nitni cast for {from} to {to} */")
+                       nitni_visitor.add_decl("{full_internal_csignature} \{")
 
-               from_var = nitni_visitor.var_from_c("from", from)
-               from_var = nitni_visitor.box_extern(from_var, from)
+                       var from_var = nitni_visitor.var_from_c("from", from)
+                       from_var = nitni_visitor.box_extern(from_var, from)
 
-               ## test type
-               var check = nitni_visitor.type_test(from_var, to, "FFI cast")
-               nitni_visitor.add("if (!{check}) \{")
-               nitni_visitor.add_abort("FFI cast failed")
-               nitni_visitor.add("\}")
+                       ## test type
+                       var check = nitni_visitor.type_test(from_var, to, "FFI cast")
+                       nitni_visitor.add("if (!{check}) \{")
+                       nitni_visitor.add_abort("FFI cast failed")
+                       nitni_visitor.add("\}")
 
-               ## internal cast
-               recv_var = nitni_visitor.autobox(from_var, to)
-               recv_var = nitni_visitor.unbox_extern(recv_var, to)
+                       ## internal cast
+                       var recv_var = nitni_visitor.autobox(from_var, to)
+                       recv_var = nitni_visitor.unbox_extern(recv_var, to)
 
-               nitni_visitor.ret_to_c(recv_var, to)
+                       nitni_visitor.ret_to_c(recv_var, to)
 
-               nitni_visitor.add("\}")
+                       nitni_visitor.add("\}")
+               end
 
                # special casts
                if from.as_nullable == to then