1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2013-2014 Alexis Laferrière <alexis.laf@xymus.net>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 # FFI support for the Java language
19 # TODO support callbacks to super and casts
24 import c_compiler_options
26 redef class FFILanguageAssignationPhase
27 var java_language
: FFILanguage = new JavaLanguage(self)
33 redef fun identify_language
(n
) do return n
.is_java
35 redef fun compile_module_block
(block
, ccu
, mmodule
)
37 mmodule
.ensure_java_files
38 var java_file
= mmodule
.java_file
39 assert java_file
!= null
41 if block
.is_inner_java
then
42 java_file
.class_content
.add
(block
.code
)
43 else java_file
.header
.add
(block
.code
)
46 redef fun compile_extern_method
(block
, m
, ccu
, mmodule
)
49 mmodule
.ensure_java_files
50 var java_file
= mmodule
.java_file
51 assert java_file
!= null
53 var mclass_type
= m
.parent
.as(AClassdef).mclass
.mclass_type
54 var mmethodef
= m
.mpropdef
55 var mproperty
= m
.mpropdef
.mproperty
57 # C function calling the Java method through JNI
58 var fc
= new ExternCFunction(m
, mmodule
)
62 jmethodID java_meth_id;
64 // retrieve the current JVM
65 Sys sys = Pointer_sys(NULL);
66 JNIEnv *nit_ffi_jni_env = Sys_jni_env(sys);
68 // retrieve the implementation Java class
69 java_class = Sys_load_jclass(sys, "{{{mmodule.impl_java_class_name}}}");
70 if (java_class == NULL) {
71 PRINT_ERROR("Nit FFI with Java error: failed to load class.\\n");
72 (*nit_ffi_jni_env)->ExceptionDescribe(nit_ffi_jni_env);
76 // register callbacks (only once per Nit module)
77 if (!nit_ffi_with_java_registered_natives) nit_ffi_with_java_register_natives(nit_ffi_jni_env, java_class);
80 # Retrieve the Java implementation function id
81 var java_fun_name
= mproperty
.build_cname
(mclass_type
, mmodule
, "___java_impl", long_signature
)
82 var jni_format
= mproperty
.build_jni_format
(mclass_type
, mmodule
)
84 // retreive the implementation static function
85 java_meth_id = (*nit_ffi_jni_env)->GetStaticMethodID(nit_ffi_jni_env, java_class, "{{{java_fun_name}}}", "{{{jni_format}}}");
86 if (java_meth_id == NULL) {
87 PRINT_ERROR("Nit FFI with Java error: Java implementation not found.\\n");
88 (*nit_ffi_jni_env)->ExceptionDescribe(nit_ffi_jni_env);
93 # Call the C Java implementation method from C
94 var signature
= mmethodef
.msignature
95 assert signature
!= null
99 var params
= new Array[String]
100 params
.add
"nit_ffi_jni_env"
101 params
.add
"java_class"
102 params
.add
"java_meth_id"
104 if mproperty
.is_init
then
105 jni_signature_alt
= mclass_type
.jni_signature_alt
106 return_type
= mclass_type
109 if signature
.return_mtype
!= null then
110 var ret_mtype
= signature
.return_mtype
111 ret_mtype
= ret_mtype
.resolve_for
(mclass_type
, mclass_type
, mmodule
, true)
112 return_type
= signature
.return_mtype
113 jni_signature_alt
= return_type
.jni_signature_alt
115 jni_signature_alt
= "Void"
120 for p
in signature
.mparameters
do
121 var param_mtype
= p
.mtype
122 param_mtype
= param_mtype
.resolve_for
(mclass_type
, mclass_type
, mmodule
, true)
123 params
.add
(to_java_call_context
.cast_to
(param_mtype
, p
.name
))
126 var cname
= "(*nit_ffi_jni_env)->CallStatic{jni_signature_alt}Method"
128 if return_type
!= null then
129 ccall
= "{return_type.jni_type} jni_res = {cname}({params.join(", ")});"
130 else ccall
= "{cname}({params.join(", ")});"
133 // execute implementation code
135 if ((*nit_ffi_jni_env)->ExceptionCheck(nit_ffi_jni_env)) {
136 PRINT_ERROR("Nit FFI with Java error: Exception after call.\\n");
137 (*nit_ffi_jni_env)->ExceptionDescribe(nit_ffi_jni_env);
141 (*nit_ffi_jni_env)->DeleteLocalRef(nit_ffi_jni_env, java_class);
144 if return_type
!= null then
145 fc
.exprs
.add
"\treturn {to_java_call_context.cast_from(return_type, "jni_res")};"
148 ccu
.add_exported_function
( fc
)
150 # Java implementation function in Java
151 var java_csig
= mproperty
.build_csignature
(mclass_type
, mmodule
, "___java_impl", long_signature
, java_call_context
)
152 mmodule
.java_file
.class_content
.add
"""
153 public static {{{java_csig}}} {
154 // from Nit FII at: {{{block.location}}}
159 mmodule
.callbacks_used_from_java
.join m
.foreign_callbacks
162 redef fun compile_extern_class
(block
, m
, ccu
, mmodule
) do end
164 redef fun get_ftype
(block
, m
) do return new ForeignJavaType(block
.code
)
166 redef fun compile_to_files
(mmodule
, compdir
)
168 var ffi_ccu
= ffi_ccu
169 assert ffi_ccu
!= null
171 # Make sure we have a .java file
172 mmodule
.ensure_java_files
174 # Needed compiler and linker options
175 mmodule
.insert_compiler_options
177 # Enable linking C callbacks to java native methods
178 mmodule
.ensure_linking_callback_methods
(ffi_ccu
)
180 # Java implementation code
181 var java_file
= mmodule
.java_file
182 assert java_file
!= null
183 var extern_java_file
= java_file
.write_to_files
(compdir
)
184 mmodule
.ffi_files
.add
(extern_java_file
)
187 var ffi_ccu
: nullable CCompilationUnit = null # HACK
189 redef fun compile_callback
(callback
, mmodule
, mainmodule
, ccu
)
192 callback
.compile_callback_to_java
(mmodule
, mainmodule
, ccu
)
197 private var callbacks_used_from_java
= new ForeignCallbackSet
199 # Java source file extracted from user FFI code with generated structure
200 var java_file
: nullable JavaClassTemplate = null
202 # Set up the templates of the Java implementation class
203 private fun ensure_java_files
205 if java_file
!= null then return
207 # Java implementation code
208 java_file
= new JavaClassTemplate(impl_java_class_name
)
211 # Compile C code to call JNI and link C callbacks implementations to Java extern methods
212 private fun ensure_linking_callback_methods
(ccu
: CCompilationUnit)
214 var callbacks
= callbacks_used_from_java
.callbacks
215 if callbacks
.is_empty
then
216 ccu
.body_decl
.add
"static int nit_ffi_with_java_registered_natives = 1;\n"
220 ccu
.body_decl
.add
"static int nit_ffi_with_java_registered_natives = 0;\n"
222 var jni_methods
= new Array[String]
223 for cb
in callbacks
do
224 jni_methods
.add_all
(cb
.jni_methods_declaration
(self))
226 for cb
in callbacks_used_from_java
.types
do
227 jni_methods
.add_all
(cb
.jni_methods_declaration
(self))
230 var cf
= new CFunction("void nit_ffi_with_java_register_natives(JNIEnv* env, jclass jclazz)")
232 nit_ffi_with_java_registered_natives = 1;
234 jint n_methods = {{{jni_methods.length}}};
235 JNINativeMethod methods[] = {
236 {{{jni_methods.join(",\n\t\t")}}}
238 jint res = (*env)->RegisterNatives(env, jclazz, methods, n_methods);
240 PRINT_ERROR("RegisterNatives failed\\n");
241 (*env)->ExceptionDescribe(env);
245 ccu
.add_local_function cf
248 # Tell the C compiler where to find jni.h and how to link with libjvm
249 private fun insert_compiler_options
251 cflags
.add_one
("", "-I $(JAVA_HOME)/include/ -I $(JAVA_HOME)/include/linux/")
254 # Name of the generated Java class where to store all implementation methods of this module
255 # as well as generated callbacks.
256 private fun impl_java_class_name
: String do return "Nit_{name}"
259 redef class AMethPropdef
260 redef fun verify_nitni_callbacks
(toolcontext
)
264 var block
= n_extern_code_block
265 if block
!= null and block
.is_java
then
266 insert_artificial_callbacks
(toolcontext
)
270 # Insert additional explicit calls to get the current `JNIEnv`
272 # This forces declaration of callbacks to Nit. The callbacks will be available in Java
273 # but will be used mainly by the FFI itself.
275 # The developer can also customize the JNIEnv used by the FFI by redefining `Sys::jni_env`.
276 private fun insert_artificial_callbacks
(toolcontext
: ToolContext)
278 var fcc
= foreign_callbacks
280 var modelbuilder
= toolcontext
.modelbuilder
281 var mmodule
= mpropdef
.mclassdef
.mmodule
283 # We use callbacks from the C FFI since they will be called from generated C
284 var c_language_visitor
= toolcontext
.ffi_language_assignation_phase
.as(FFILanguageAssignationPhase).c_language
285 if not mmodule
.ffi_callbacks
.keys
.has
(c_language_visitor
) then
286 mmodule
.ffi_callbacks
[c_language_visitor
] = new HashSet[NitniCallback]
290 var pointer_class
= modelbuilder
.try_get_mclass_by_name
(self, mmodule
, "Pointer")
291 assert pointer_class
!= null
292 var pointer_sys_meth
= modelbuilder
.try_get_mproperty_by_name2
(self, mmodule
, pointer_class
.mclass_type
, "sys")
293 assert pointer_sys_meth
!= null and pointer_sys_meth
isa MMethod
295 var explicit_call
= new MExplicitCall(pointer_class
.mclass_type
, pointer_sys_meth
, mmodule
)
296 fcc
.callbacks
.add
(explicit_call
)
297 mmodule
.ffi_callbacks
[c_language_visitor
].add
(explicit_call
)
300 var sys_class
= modelbuilder
.try_get_mclass_by_name
(self, mmodule
, "Sys")
301 assert sys_class
!= null
302 var sys_jni_env_meth
= modelbuilder
.try_get_mproperty_by_name2
(self, mmodule
, sys_class
.mclass_type
, "jni_env")
303 if sys_jni_env_meth
== null or not sys_jni_env_meth
isa MMethod then
304 toolcontext
.error
(self.location
, "Java FFI Error: you must import the `java` module when using the FFI with Java")
308 explicit_call
= new MExplicitCall(sys_class
.mclass_type
, sys_jni_env_meth
, mmodule
)
309 fcc
.callbacks
.add
(explicit_call
)
310 mmodule
.ffi_callbacks
[c_language_visitor
].add
(explicit_call
)
313 var sys_jni_load_jclass_meth
= modelbuilder
.try_get_mproperty_by_name2
(self, mmodule
, sys_class
.mclass_type
, "load_jclass")
314 assert sys_jni_load_jclass_meth
!= null
315 assert sys_jni_load_jclass_meth
isa MMethod
317 explicit_call
= new MExplicitCall(sys_class
.mclass_type
, sys_jni_load_jclass_meth
, mmodule
)
318 fcc
.callbacks
.add
(explicit_call
)
319 mmodule
.ffi_callbacks
[c_language_visitor
].add
(explicit_call
)
320 explicit_call
.fill_type_for
(fcc
, mmodule
)
324 redef class AExternCodeBlock
325 # Is this code block in Java?
326 fun is_java
: Bool do return is_default_java
or (parent
isa AModule and is_inner_java
)
328 # Is this code block in Java, with the default mode? (On module blocks it targets the file header)
329 private fun is_default_java
: Bool do return language_name
!= null and
330 language_name_lowered
== "java"
332 # Is this code block in Java, and for a module block to generate in the class?
333 private fun is_inner_java
: Bool do return language_name
!= null and
334 language_name_lowered
== "java inner"
337 # Java class source template
338 class JavaClassTemplate
341 var java_class_name
: String
343 var header
= new Template
344 var class_content
= new Template
346 fun write_to_files
(compdir
: String): ExternFile
348 var filename
= "{java_class_name}.java"
349 var filepath
= compdir
/filename
351 write_to_file filepath
353 return new JavaFile(filename
)
360 add
"public class {java_class_name} \{\n"
366 # A generated Java source file, represent the corresponding Makefile rules
370 redef fun makefile_rule_name
do return "{filename.basename(".java")}.class"
371 redef fun makefile_rule_content
do return "javac {filename.basename} -d ."
372 redef fun add_to_jar
do return true
375 # Context in pure Java code
376 private class JavaCallContext
379 redef fun name_mtype
(mtype
) do return mtype
.java_type
382 # Context in C, when call are from normal C to JNI
383 private class ToJavaCallContext
386 redef fun cast_to
(mtype
, name
) do return "({mtype.jni_type})({name})"
387 redef fun cast_from
(mtype
, name
) do return "({mtype.cname})({name})"
388 redef fun name_mtype
(mtype
) do return mtype
.jni_type
391 # Context in C, when call are from JNI to normal C
392 private class FromJavaCallContext
395 redef fun cast_to
(mtype
, name
) do return "({mtype.cname})({name})"
396 redef fun cast_from
(mtype
, name
) do return "({mtype.jni_type})({name})"
397 redef fun name_mtype
(mtype
) do return mtype
.jni_type
400 # Foreign type attach to Nit extern Java classes
401 class ForeignJavaType
404 var java_type
: String
407 redef class NitniCallback
408 # Compile C and Java code to implement this callback
409 fun compile_callback_to_java
(mmodule
: MModule, mainmodule
: MModule, ccu
: CCompilationUnit) do end
411 # Returns the list of C functions to link with extern Java methods, as required
412 # to enable this callback from Java code.
414 # Return used by `MModule::ensure_linking_callback_methods`
416 # TODO we return an Array to support cast and other features like that
417 fun jni_methods_declaration
(from_module
: MModule): Array[String] do return new Array[String]
420 redef class MExplicitCall
421 redef fun compile_callback_to_java
(mmodule
, mainmodule
, ccu
)
423 if not mmodule
.callbacks_used_from_java
.callbacks
.has
(self) then return
425 var mproperty
= mproperty
426 assert mproperty
isa MMethod
428 # In C, indirection implementing the Java extern methods
429 var csignature
= mproperty
.build_c_implementation_signature
(recv_mtype
, mmodule
, "___indirect", long_signature
, from_java_call_context
)
430 var cf
= new CFunction("JNIEXPORT {csignature}")
431 cf
.exprs
.add
"\t{mproperty.build_ccall(recv_mtype, mainmodule, null, long_signature, from_java_call_context, null)}\n"
432 ccu
.add_non_static_local_function cf
434 # In Java, declare the extern method as a private static local method
435 var java_signature
= mproperty
.build_csignature
(recv_mtype
, mainmodule
, null, short_signature
, java_call_context
)
436 mmodule
.java_file
.class_content
.add
"private native static {java_signature};\n"
439 redef fun jni_methods_declaration
(from_mmodule
)
441 var mproperty
= mproperty
442 assert mproperty
isa MMethod
444 var java_name
= mproperty
.build_cname
(recv_mtype
, from_mmodule
, null, short_signature
)
445 var jni_format
= mproperty
.build_jni_format
(recv_mtype
, from_mmodule
)
446 var c_name
= mproperty
.build_cname
(recv_mtype
, from_mmodule
, "___indirect", long_signature
)
448 return ["""{"{{{java_name}}}", "{{{jni_format}}}", {{{c_name}}}}"""]
456 # * Primitives common to both languages use their Java primitive type
457 # * Nit extern Java classes are represented by their full Java type
458 # * Other Nit objects are represented by `int` in Java. It holds the
459 # pointer to the underlying C structure.
460 # TODO create static Java types to store and hide the pointer
461 private fun java_type
: String do return "int"
463 # JNI type name (in C)
465 # So this is a C type, usually defined in `jni.h`
466 private fun jni_type
: String do return "long"
468 # JNI short type name (for signatures)
470 # Is used by `MMethod::build_jni_format` to pass a Java method signature
471 # to the JNI function `GetStaticMetodId`.
472 private fun jni_format
: String do return "I"
474 # Type name appearing within JNI function names.
476 # Used by `JavaLanguage::compile_extern_method` when calling JNI's `CallStatic*Method`.
477 # This strategy is used by JNI to type the return of callbacks to Java.
478 private fun jni_signature_alt
: String do return "Int"
480 redef fun compile_callback_to_java
(mmodule
, mainmodule
, ccu
)
482 var java_file
= mmodule
.java_file
483 if java_file
== null then return
485 for variation
in ["incr", "decr"] do
486 var friendly_name
= "{mangled_cname}_{variation}_ref"
489 var csignature
= "void {mmodule.impl_java_class_name}_{friendly_name}(JNIEnv *env, jclass clazz, jint object)"
490 var cf
= new CFunction("JNIEXPORT {csignature}")
491 cf
.exprs
.add
"\tnitni_global_ref_{variation}((void*)(long)object);"
492 ccu
.add_non_static_local_function cf
495 java_file
.class_content
.add
"private native static void {friendly_name}(int object);\n"
499 redef fun jni_methods_declaration
(from_mmodule
)
501 var arr
= new Array[String]
502 for variation
in ["incr", "decr"] do
503 var friendly_name
= "{mangled_cname}_{variation}_ref"
504 var jni_format
= "(I)V"
505 var cname
= "{from_mmodule.impl_java_class_name}_{friendly_name}"
506 arr
.add
"""{"{{{friendly_name}}}", "{{{jni_format}}}", {{{cname}}}}"""
513 redef class MClassType
516 var ftype
= mclass
.ftype
517 if ftype
isa ForeignJavaType then return ftype
.java_type
.
518 replace
('/', ".").replace
('$', ".").replace
(' ', "").replace
('\n',"")
519 if mclass
.name
== "Bool" then return "boolean"
520 if mclass
.name
== "Char" then return "int"
521 if mclass
.name
== "Int" then return "long"
522 if mclass
.name
== "Float" then return "double"
523 if mclass
.name
== "Byte" then return "byte"
524 if mclass
.name
== "Int8" then return "byte"
525 if mclass
.name
== "Int16" then return "short"
526 if mclass
.name
== "UInt16" then return "short"
527 if mclass
.name
== "Int32" then return "int"
528 if mclass
.name
== "UInt32" then return "int"
534 var ftype
= mclass
.ftype
535 if ftype
isa ForeignJavaType then return "jobject"
536 if mclass
.name
== "Bool" then return "jboolean"
537 if mclass
.name
== "Char" then return "jint"
538 if mclass
.name
== "Int" then return "jlong"
539 if mclass
.name
== "Float" then return "jdouble"
540 if mclass
.name
== "Byte" then return "jbyte"
541 if mclass
.name
== "Int8" then return "jbyte"
542 if mclass
.name
== "Int16" then return "jshort"
543 if mclass
.name
== "UInt16" then return "jshort"
544 if mclass
.name
== "Int32" then return "jint"
545 if mclass
.name
== "UInt32" then return "jint"
551 var ftype
= mclass
.ftype
552 if ftype
isa ForeignJavaType then
553 var jni_type
= ftype
.java_type
.
554 replace
('.', "/").replace
(' ', "").replace
('\n', "")
556 # Remove parameters of generic types
558 var i
= jni_type
.last_index_of
('<')
560 var j
= jni_type
.index_of_from
('>', i
)
562 print
"Error: missing closing '>' in extern Java type of \"{mclass.name}\
""
565 jni_type
= jni_type
.substring
(0, i
) +
566 jni_type
.substring
(j
+1, jni_type
.length
)
570 # Change `float[]` to `[float`
571 if jni_type
.has
('[') then
572 var depth
= jni_type
.chars
.count
('[')
573 var java_type
= jni_type
.replace
("[]", "")
576 if java_type
== "boolean" then
578 else if java_type
== "byte" then
580 else if java_type
== "char" then
582 else if java_type
== "short" then
584 else if java_type
== "int" then
586 else if java_type
== "long" then
588 else if java_type
== "float" then
590 else if java_type
== "double" then
593 short
= "L{java_type};"
596 return "["*depth
+ short
599 return "L{jni_type};"
601 if mclass
.name
== "Bool" then return "Z"
602 if mclass
.name
== "Char" then return "I"
603 if mclass
.name
== "Int" then return "J"
604 if mclass
.name
== "Float" then return "D"
605 if mclass
.name
== "Byte" then return "B"
606 if mclass
.name
== "Int8" then return "B"
607 if mclass
.name
== "Int16" then return "S"
608 if mclass
.name
== "UInt16" then return "S"
609 if mclass
.name
== "Int32" then return "I"
610 if mclass
.name
== "UInt32" then return "I"
614 redef fun jni_signature_alt
616 var ftype
= mclass
.ftype
618 if ftype
isa ForeignJavaType then return "Object"
619 if mclass
.name
== "Bool" then return "Boolean"
620 if mclass
.name
== "Char" then return "Int"
621 if mclass
.name
== "Int" then return "Long"
622 if mclass
.name
== "Float" then return "Double"
623 if mclass
.name
== "Byte" then return "Byte"
624 if mclass
.name
== "Int8" then return "Byte"
625 if mclass
.name
== "Int16" then return "Short"
626 if mclass
.name
== "UInt16" then return "Short"
627 if mclass
.name
== "Int32" then return "Int"
628 if mclass
.name
== "UInt32" then return "Int"
634 # Returns the JNI signature format of this Nit method
636 # Example: a Nity signature `(Bool, Int, Float, JavaString)` is represented by
637 # the JNI format `(ZIDLjava/lang/string;)V"
638 private fun build_jni_format
(recv_mtype
: MClassType, from_mmodule
: MModule): String
640 var mmethoddef
= lookup_first_definition
(from_mmodule
, recv_mtype
)
641 var msignature
= mmethoddef
.msignature
642 var format
= new Array[String]
647 if not self.is_init
then format
.add recv_mtype
.jni_format
650 for p
in msignature
.mparameters
do
651 var param_mtype
= p
.mtype
.resolve_for
(recv_mtype
, recv_mtype
, from_mmodule
, true)
652 format
.add param_mtype
.jni_format
658 format
.add recv_mtype
.jni_format
660 var return_mtype
= msignature
.return_mtype
661 if return_mtype
!= null then
662 return_mtype
= return_mtype
.resolve_for
(recv_mtype
, recv_mtype
, from_mmodule
, true)
663 format
.add return_mtype
.jni_format
670 # Similar to `build_c_signature` but adapted to create the signature expected by JNI for C functions
671 # implementing Java extern methods.
673 # Is used to generate FFI callbacks to Nit at `MExplicitCall::compile_callback_to_java`.
674 private fun build_c_implementation_signature
(recv_mtype
: MClassType, from_mmodule
: MModule,
675 suffix
: nullable String, length
: SignatureLength, call_context
: CallContext): String
677 var mmethoddef
= lookup_first_definition
(from_mmodule
, recv_mtype
)
678 var signature
= mmethoddef
.msignature
679 assert signature
!= null
683 creturn_type
= call_context
.name_mtype
(recv_mtype
)
684 else if signature
.return_mtype
!= null then
685 var ret_mtype
= signature
.return_mtype
686 ret_mtype
= ret_mtype
.resolve_for
(recv_mtype
, recv_mtype
, from_mmodule
, true)
687 creturn_type
= call_context
.name_mtype
(ret_mtype
)
689 creturn_type
= "void"
692 var cname
= build_cname
(recv_mtype
, from_mmodule
, suffix
, length
)
694 var cparams
= new List[String]
697 cparams
.add
"JNIEnv *env"
698 cparams
.add
"jclass clazz"
700 if not self.is_init
then
701 cparams
.add
"{call_context.name_mtype(recv_mtype)} self"
703 for p
in signature
.mparameters
do
704 var param_mtype
= p
.mtype
.resolve_for
(recv_mtype
, recv_mtype
, from_mmodule
, true)
705 cparams
.add
"{call_context.name_mtype(param_mtype)} {p.name}"
708 return "{creturn_type} {cname}( {cparams.join(", ")} )"
712 private fun java_call_context
: JavaCallContext do return new JavaCallContext
713 private fun to_java_call_context
: ToJavaCallContext do return new ToJavaCallContext
714 private fun from_java_call_context
: FromJavaCallContext do return new FromJavaCallContext
716 redef class CCompilationUnit
717 # Similar to `add_local_function` but not `static`
719 # Used when the signature contains a visibility attribute.
720 private fun add_non_static_local_function
(c_function
: CFunction)
722 body_decl
.add c_function
.signature
726 body_impl
.add c_function
.to_writer