1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2013 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 compilers
20 intrude import abstract_compiler
25 private var foreign_callbacks
= new ForeignCallbackSet
26 var nitni_ccu
: nullable CCompilationUnit = null
28 private fun nmodule
(v
: AbstractCompilerVisitor): nullable AModule
30 var m2n
= v
.compiler
.modelbuilder
.mmodule2nmodule
31 return m2n
.get_or_null
(self)
34 redef fun finalize_ffi
(compiler
: AbstractCompiler)
36 if not uses_ffi
then return
38 var v
= compiler
.new_visitor
40 if n
== null then return
41 n
.ensure_compile_ffi_wrapper
42 finalize_ffi_wrapper
(v
.compiler
.modelbuilder
.compile_dir
, v
.compiler
.mainmodule
)
43 for file
in ffi_files
do v
.compiler
.extern_bodies
.add
(file
)
45 ensure_compile_nitni_base
(v
)
47 nitni_ccu
.header_c_types
.add
("#include \"{name}._ffi
.h\
"\n")
48 nitni_ccu
.header_c_types
.add
"""
49 extern void nitni_global_ref_incr(void*);
50 extern void nitni_global_ref_decr(void*);
53 nitni_ccu
.write_as_nitni
(self, v
.compiler
.modelbuilder
.compile_dir
)
55 for file
in nitni_ccu
.files
do
56 var f
= new ExternCFile(file
, c_compiler_options
)
57 f
.pkgconfigs
.add_all pkgconfigs
58 v
.compiler
.extern_bodies
.add
(f
)
61 # reset FFI things so the next compilation job, if any, starts with a clean context
62 # FIXME clean and rationalize this
64 compiled_ffi_methods
.clear
67 compiled_callbacks
.clear
68 #Do not reset `foreign_callbacks` and `ffi_callbacks` because they are computed in previous phases
71 private fun ensure_compile_nitni_base
(v
: AbstractCompilerVisitor)
73 if nitni_ccu
!= null then return
75 nitni_ccu
= new CCompilationUnit
78 redef fun collect_linker_libs
80 var s
= c_linker_options
81 if s
.is_empty
then return null
82 var res
= new ArraySet[String]
87 private var compiled_callbacks
= new Array[NitniCallback]
89 # Returns true if callbacks has yet to be generated and register it as being generated
90 private fun check_callback_compilation
(cb
: NitniCallback): Bool
92 var compiled
= compiled_callbacks
.has
(cb
)
93 if not compiled
then compiled_callbacks
.add
(cb
)
98 redef class AMethPropdef
99 private fun compile_ffi_support_to_c
(v
: AbstractCompilerVisitor)
101 var mmodule
= mpropdef
.mclassdef
.mmodule
102 var mainmodule
= v
.compiler
.mainmodule
103 var amodule
= v
.compiler
.modelbuilder
.mmodule2nmodule
[mmodule
]
104 var mclass_type
= mpropdef
.mclassdef
.bound_mtype
107 var csignature
= mpropdef
.mproperty
.build_csignature
(mclass_type
, mmodule
, "___impl", long_signature
, internal_call_context
)
108 v
.declare_once
("{csignature};")
111 amodule
.ensure_compile_ffi_wrapper
112 compile_ffi_method
(mmodule
)
114 # nitni - Compile missing callbacks
115 mmodule
.ensure_compile_nitni_base
(v
)
116 var ccu
= mmodule
.nitni_ccu
.as(not null)
118 for mtype
in foreign_callbacks
.types
do
119 if not mtype
.is_cprimitive
then
120 mtype
.compile_extern_type
(v
, ccu
)
122 # has callbacks already been compiled? (this may very well happen with global compilation)
123 if mmodule
.check_callback_compilation
(mtype
) then mtype
.compile_extern_helper_functions
(v
, ccu
)
128 for cb
in foreign_callbacks
.callbacks
do if mainmodule
.check_callback_compilation
(cb
) then
129 cb
.compile_extern_callback
(v
, ccu
)
132 for cb
in foreign_callbacks
.supers
do if mainmodule
.check_callback_compilation
(cb
) then
133 cb
.compile_extern_callback
(v
, ccu
)
136 for cb
in foreign_callbacks
.casts
do if mainmodule
.check_callback_compilation
(cb
) then
137 cb
.compile_extern_callbacks
(v
, ccu
)
140 # manage nitni callback set
141 mmodule
.foreign_callbacks
.join
(foreign_callbacks
)
144 redef fun compile_externmeth_to_c
(v
, mpropdef
, arguments
)
146 # if using the old native interface fallback on previous implementation
147 if n_extern_code_block
== null then return super
149 var mmodule
= mpropdef
.mclassdef
.mmodule
150 mmodule
.uses_ffi
= true
152 var mclass_type
= mpropdef
.mclassdef
.bound_mtype
154 # Outgoing code in compiler
155 var externname
= mpropdef
.mproperty
.build_cname
(mpropdef
.mclassdef
.bound_mtype
, mmodule
, "___impl", long_signature
)
156 var recv_var
: nullable RuntimeVariable = null
157 var return_mtype
= mpropdef
.msignature
.return_mtype
158 if return_mtype
!= null then
159 return_mtype
= return_mtype
.anchor_to
(mmodule
, mclass_type
)
160 recv_var
= v
.new_var
(return_mtype
)
163 v
.adapt_signature
(mpropdef
, arguments
)
164 v
.unbox_signature_extern
(mpropdef
, arguments
)
166 var arguments_for_c
= new Array[String]
167 for a
in [0..arguments
.length
[ do
168 var arg
= arguments
[a
]
169 var param_mtype
: MType
171 param_mtype
= mpropdef
.mclassdef
.mclass
.mclass_type
172 else param_mtype
= mpropdef
.msignature
.mparameters
[a-1
].mtype
174 param_mtype
= param_mtype
.anchor_to
(mmodule
, mclass_type
)
176 if param_mtype
.is_cprimitive
then
177 arguments_for_c
.add
(arg
.name
)
179 v
.add
("struct nitni_instance* var_for_c_{a};")
180 v
.add
("var_for_c_{a} = nit_alloc(sizeof(struct nitni_instance));")
181 v
.add
("var_for_c_{a}->value = {arg.name};")
182 arguments_for_c
.add
("var_for_c_{a}")
186 if recv_var
== null then
187 v
.add
("{externname}({arguments_for_c.join(", ")});")
189 assert return_mtype
!= null
190 if return_mtype
.is_cprimitive
then
191 v
.add
("{recv_var} = {externname}({arguments_for_c.join(", ")});")
193 v
.add
("struct nitni_instance* ret_var;")
194 v
.add
("ret_var = {externname}({arguments_for_c.join(", ")});")
195 v
.add
("{recv_var} = ret_var->value;")
197 recv_var
= v
.box_extern
(recv_var
, return_mtype
)
201 compile_ffi_support_to_c
(v
)
205 redef fun compile_externinit_to_c
(v
, mpropdef
, arguments
)
207 # if using the old native interface fallback on previous implementation
208 if n_extern_code_block
== null then return super
210 var mmodule
= mpropdef
.mclassdef
.mmodule
211 mmodule
.uses_ffi
= true
213 var mclass_type
= mpropdef
.mclassdef
.bound_mtype
215 var externname
= mpropdef
.mproperty
.build_cname
(mpropdef
.mclassdef
.bound_mtype
, mmodule
, "___impl", long_signature
)
216 var return_mtype
= arguments
.first
.mtype
217 var recv_var
= v
.new_var
(return_mtype
)
219 v
.adapt_signature
(mpropdef
, arguments
)
220 v
.unbox_signature_extern
(mpropdef
, arguments
)
224 var arguments_for_c
= new Array[String]
225 for a
in [0..arguments
.length
[ do
226 var arg
= arguments
[a
]
227 var param_mtype
: MType
228 param_mtype
= mpropdef
.msignature
.mparameters
[a
].mtype
229 param_mtype
= param_mtype
.anchor_to
(mmodule
, mclass_type
)
231 if param_mtype
.is_cprimitive
then
232 arguments_for_c
.add
(arg
.name
)
234 v
.add
("struct nitni_instance* var_for_c_{a};")
235 v
.add
("var_for_c_{a} = nit_alloc(sizeof(struct nitni_instance));")
236 v
.add
("var_for_c_{a}->value = {arg.name};")
237 arguments_for_c
.add
("var_for_c_{a}")
241 if return_mtype
.is_cprimitive
then
242 v
.add
("{recv_var} = {externname}({arguments_for_c.join(", ")});")
244 v
.add
("struct nitni_instance* ret_var;")
245 v
.add
("ret_var = {externname}({arguments_for_c.join(", ")});")
246 v
.add
("{recv_var} = ret_var->value;")
248 recv_var
= v
.box_extern
(recv_var
, return_mtype
)
251 compile_ffi_support_to_c
(v
)
256 redef class CCompilationUnit
257 fun write_as_nitni
(mmodule
: MModule, compdir
: String)
259 var base_name
= "{mmodule.name}._nitni"
261 var h_file
= "{base_name}.h"
262 write_header_to_file
( mmodule
, "{compdir}/{h_file}", new Array[String],
263 "{mmodule.cname.to_s.to_upper}_NITG_NITNI_H")
265 var c_file
= "{base_name}.c"
266 write_body_to_file
( mmodule
, "{compdir}/{c_file}", ["\"{h_file}\
""] )
268 files
.add
( "{compdir}/{c_file}" )
272 redef class AbstractCompiler
273 # Cache to avoid multiple compilation of NULL values
274 # see FIXME in `MNullableType#compile_extern_helper_functions`
275 private var compiled_null_types
= new Array[MNullableType]
278 redef class AbstractCompilerVisitor
279 # Create a `RuntimeVariable` for this C variable originating from C user code
280 private fun var_from_c
(name
: String, mtype
: MType): RuntimeVariable
282 if mtype
.is_cprimitive
then
283 return new RuntimeVariable(name
, mtype
, mtype
)
285 return new RuntimeVariable("{name}->value", mtype
, mtype
)
289 # Return a `RuntimeVarible` to C user code
290 private fun ret_to_c
(src
: RuntimeVariable, mtype
: MType)
292 if mtype
.is_cprimitive
then
295 add
("struct nitni_instance* ret_for_c;")
296 add
("ret_for_c = nit_alloc(sizeof(struct nitni_instance));")
297 add
("ret_for_c->value = {src};")
298 add
("return ret_for_c;")
304 private fun compile_extern_type
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
306 assert not is_cprimitive
308 # define friendly type
309 ccu
.header_c_types
.add
("#ifndef NIT_TYPE_{cname}\n")
310 ccu
.header_c_types
.add
("#define NIT_TYPE_{cname} 1\n")
311 ccu
.header_c_types
.add
("typedef struct nitni_instance *{cname};\n")
312 ccu
.header_c_types
.add
("#endif\n")
315 private fun compile_extern_helper_functions
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
317 # actually, we do not need to do anything when using the bohem garbage collector
318 var call_context
= from_c_call_context
321 ccu
.header_decl
.add
"#ifndef {mangled_cname}_incr_ref\n"
322 ccu
.header_decl
.add
" #define {mangled_cname}_incr_ref(from) nitni_global_ref_incr(({call_context.name_mtype(self)})(from))\n"
323 ccu
.header_decl
.add
"#endif\n"
326 ccu
.header_decl
.add
"#ifndef {mangled_cname}_decr_ref\n"
327 ccu
.header_decl
.add
" #define {mangled_cname}_decr_ref(from) nitni_global_ref_decr(({call_context.name_mtype(self)})(from))\n"
328 ccu
.header_decl
.add
"#endif\n"
332 redef class MNullableType
333 redef fun compile_extern_helper_functions
(v
, ccu
)
337 var base_cname
= "null_{mtype.mangled_cname}"
338 var full_cname
= "NIT_NULL___{base_cname}"
340 # In nitni files, declare internal function as extern
341 var full_friendly_csignature
= "{cname_blind} {full_cname}()"
342 ccu
.header_decl
.add
("extern {full_friendly_csignature};\n")
344 # In nitni files, #define friendly as extern
345 ccu
.header_decl
.add
("#define {base_cname} {full_cname}\n")
347 # FIXME: This is ugly an broke the separate compilation principle
348 # The real function MUST be compiled only once, #define pragma only protect the compiler, not the loader
349 # However, I am not sure of the right approach here (eg. week refs are ugly)
350 if v
.compiler
.compiled_null_types
.has
(self) then return
351 v
.compiler
.compiled_null_types
.add
self
353 # Internally, implement internal function
354 var nitni_visitor
= v
.compiler
.new_visitor
355 nitni_visitor
.frame
= v
.frame
356 var full_internal_csignature
= "{cname_blind} {full_cname}()"
357 nitni_visitor
.add
("{full_internal_csignature} \{")
358 nitni_visitor
.add
("struct nitni_instance* ret_for_c;")
359 nitni_visitor
.add
("ret_for_c = nit_alloc(sizeof(struct nitni_instance));")
360 nitni_visitor
.add
("ret_for_c->value = NULL;")
361 nitni_visitor
.add
("return ret_for_c;")
362 nitni_visitor
.add
("\}")
366 redef class MExplicitCall
367 private fun compile_extern_callback
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
369 var mproperty
= mproperty
370 assert mproperty
isa MMethod
372 # In nitni files, declare internal function as extern
373 var full_friendly_csignature
= mproperty
.build_csignature
(recv_mtype
, v
.compiler
.mainmodule
, null, long_signature
, internal_call_context
)
374 ccu
.header_decl
.add
("extern {full_friendly_csignature};\n")
376 # Internally, implement internal function
377 var nitni_visitor
= v
.compiler
.new_visitor
378 nitni_visitor
.frame
= v
.frame
379 var msignature
= mproperty
.lookup_first_definition
(v
.compiler
.mainmodule
, recv_mtype
).msignature
380 var csignature_blind
= mproperty
.build_csignature
(recv_mtype
, v
.compiler
.mainmodule
, null, long_signature
, internal_call_context
)
382 nitni_visitor
.add_decl
("/* nitni callback for {mproperty.full_name} */")
383 nitni_visitor
.add_decl
("{csignature_blind} \{")
385 var vars
= new Array[RuntimeVariable]
386 var mtype
: MType = recv_mtype
388 if mproperty
.is_init
then
389 var recv_mtype
= recv_mtype
390 recv_var
= nitni_visitor
.init_instance
(recv_mtype
)
391 nitni_visitor
.add
("{mtype.ctype} recv /* var self: {mtype} */;")
392 nitni_visitor
.add
("recv = {recv_var};")
394 mtype
= mtype
.anchor_to
(v
.compiler
.mainmodule
, recv_mtype
)
395 recv_var
= nitni_visitor
.var_from_c
("recv", mtype
)
396 recv_var
= nitni_visitor
.box_extern
(recv_var
, mtype
)
401 for p
in msignature
.mparameters
do
402 var arg_mtype
= p
.mtype
.anchor_to
(v
.compiler
.mainmodule
, recv_mtype
)
403 var arg
= nitni_visitor
.var_from_c
(p
.name
, arg_mtype
)
404 arg
= nitni_visitor
.box_extern
(arg
, arg_mtype
)
408 var ret_var
= nitni_visitor
.send
(mproperty
, vars
)
410 var return_mtype
= msignature
.return_mtype
411 if mproperty
.is_init
then
412 if recv_mtype
.mclass
.kind
!= extern_kind
then ret_var
= recv_var
413 return_mtype
= recv_mtype
415 if return_mtype
!= null then
416 assert ret_var
!= null
417 return_mtype
= return_mtype
.anchor_to
(v
.compiler
.mainmodule
, recv_mtype
)
418 ret_var
= nitni_visitor
.autobox
(ret_var
, return_mtype
)
419 ret_var
= nitni_visitor
.unbox_extern
(ret_var
, return_mtype
)
420 nitni_visitor
.ret_to_c
(ret_var
, return_mtype
)
422 nitni_visitor
.add
("\}")
426 redef class MExplicitSuper
427 private fun compile_extern_callback
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
429 var mproperty
= from
.mproperty
430 assert mproperty
isa MMethod
431 var mclass_type
= from
.mclassdef
.mclass
.mclass_type
433 # In nitni files, declare internal function as extern
434 var internal_csignature
= mproperty
.build_csignature
(mclass_type
, v
.compiler
.mainmodule
, "___super", long_signature
, internal_call_context
)
435 ccu
.header_decl
.add
("extern {internal_csignature};\n")
437 # In nitni files, #define friendly as extern
438 var friendly_cname
= mproperty
.build_cname
(mclass_type
, v
.compiler
.mainmodule
, "___super", short_signature
)
439 var internal_cname
= mproperty
.build_cname
(mclass_type
, v
.compiler
.mainmodule
, "___super", long_signature
)
440 ccu
.header_decl
.add
("#define {friendly_cname} {internal_cname}\n")
442 # Internally, implement internal function
443 var nitni_visitor
= v
.compiler
.new_visitor
444 nitni_visitor
.frame
= v
.frame
445 var msignature
= mproperty
.lookup_first_definition
(v
.compiler
.mainmodule
, mclass_type
).msignature
447 var csignature_blind
= mproperty
.build_csignature
(mclass_type
, v
.compiler
.mainmodule
, "___super", long_signature
, internal_call_context
)
449 nitni_visitor
.add_decl
("/* nitni callback to super for {mproperty.full_name} */")
450 nitni_visitor
.add_decl
("{csignature_blind} \{")
452 var vars
= new Array[RuntimeVariable]
454 var recv_var
= nitni_visitor
.var_from_c
("recv", mclass_type
)
455 recv_var
= nitni_visitor
.box_extern
(recv_var
, mclass_type
)
458 for p
in msignature
.mparameters
do
459 var arg_mtype
= v
.anchor
(p
.mtype
)
460 var arg
= nitni_visitor
.var_from_c
(p
.name
, arg_mtype
)
461 arg
= nitni_visitor
.box_extern
(arg
, arg_mtype
)
465 var ret_var
= nitni_visitor
.supercall
(from
.as(MMethodDef), mclass_type
, vars
)
467 var return_mtype
= msignature
.return_mtype
468 if return_mtype
!= null then
469 assert ret_var
!= null
470 return_mtype
= v
.anchor
(return_mtype
)
471 ret_var
= nitni_visitor
.autobox
(ret_var
, return_mtype
)
472 ret_var
= nitni_visitor
.unbox_extern
(ret_var
, return_mtype
)
473 nitni_visitor
.ret_to_c
(ret_var
, return_mtype
)
475 nitni_visitor
.add
("\}")
479 redef class MExplicitCast
480 private fun compile_extern_callbacks
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
489 # In nitni files, declare internal function as extern
490 var full_friendly_csignature
= "int {v.compiler.mainmodule.name }___{from.mangled_cname}_is_a_{to.mangled_cname}({from.cname_blind})"
491 ccu
.header_decl
.add
("extern {full_friendly_csignature};\n")
493 # In nitni files, #define friendly as extern
494 ccu
.header_decl
.add
("#define {check_cname} {v.compiler.mainmodule.name}___{check_cname}\n")
496 # Internally, implement internal function
497 var nitni_visitor
= v
.compiler
.new_visitor
498 nitni_visitor
.frame
= v
.frame
500 var full_internal_csignature
= "int {v.compiler.mainmodule.name }___{from.mangled_cname}_is_a_{to.mangled_cname}({internal_call_context.name_mtype(from)} from)"
502 nitni_visitor
.add_decl
("/* nitni check for {from} to {to} */")
503 nitni_visitor
.add_decl
("{full_internal_csignature} \{")
505 #var from_var = new RuntimeVariable("from->value", from, from)
506 var from_var
= nitni_visitor
.var_from_c
("from", from
)
507 from_var
= nitni_visitor
.box_extern
(from_var
, from
)
508 var recv_var
= nitni_visitor
.type_test
(from_var
, to
, "FFI isa")
509 nitni_visitor
.add
("return {recv_var};")
511 nitni_visitor
.add
("\}")
514 if from
== to
.as_nullable
then
516 ccu
.header_decl
.add
("#define {from.mangled_cname}_is_null !{from.mangled_cname}_is_a_{to.mangled_cname}\n")
523 # In nitni files, declare internal function as extern
524 full_friendly_csignature
= "{to.cname_blind} {v.compiler.mainmodule.name }___{from.mangled_cname}_as_{to.mangled_cname}({from.cname_blind})"
525 ccu
.header_decl
.add
("extern {full_friendly_csignature};\n")
527 # In nitni files, #define friendly as extern
528 ccu
.header_decl
.add
("#define {cast_cname} {v.compiler.mainmodule.name}___{cast_cname}\n")
530 # Internally, implement internal function
531 nitni_visitor
= v
.compiler
.new_visitor
532 nitni_visitor
.frame
= v
.frame
534 full_internal_csignature
= "{to.cname_blind} {v.compiler.mainmodule.name }___{from.mangled_cname}_as_{to.mangled_cname}({internal_call_context.name_mtype(from)} from)"
535 nitni_visitor
.add_decl
("/* nitni cast for {from} to {to} */")
536 nitni_visitor
.add_decl
("{full_internal_csignature} \{")
538 from_var
= nitni_visitor
.var_from_c
("from", from
)
539 from_var
= nitni_visitor
.box_extern
(from_var
, from
)
542 var check
= nitni_visitor
.type_test
(from_var
, to
, "FFI cast")
543 nitni_visitor
.add
("if (!{check}) \{")
544 nitni_visitor
.add_abort
("FFI cast failed")
545 nitni_visitor
.add
("\}")
548 recv_var
= nitni_visitor
.autobox
(from_var
, to
)
549 recv_var
= nitni_visitor
.unbox_extern
(recv_var
, to
)
551 nitni_visitor
.ret_to_c
(recv_var
, to
)
553 nitni_visitor
.add
("\}")
556 if from
.as_nullable
== to
then
557 # format A_as_nullable
558 ccu
.header_decl
.add
("#define {from.mangled_cname}_as_nullable {from.mangled_cname}_as_{to.mangled_cname}\n")
561 if from
== to
.as_nullable
then
562 # format A_as_nullable
563 ccu
.header_decl
.add
("#define {to.mangled_cname}_as_not_nullable {from.mangled_cname}_as_{to.mangled_cname}\n")