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 v
.compiler
.extern_bodies
.add
(new ExternCFile(file
, c_compiler_options
))
59 # reset FFI things so the next compilation job, if any, starts with a clean context
60 # FIXME clean and rationalize this
62 compiled_ffi_methods
.clear
65 compiled_callbacks
.clear
66 #Do not reset `foreign_callbacks` and `ffi_callbacks` because they are computed in previous phases
69 private fun ensure_compile_nitni_base
(v
: AbstractCompilerVisitor)
71 if nitni_ccu
!= null then return
73 nitni_ccu
= new CCompilationUnit
76 redef fun collect_linker_libs
78 var s
= c_linker_options
79 if s
.is_empty
then return null
80 var res
= new ArraySet[String]
85 private var compiled_callbacks
: Array[NitniCallback] = new Array[NitniCallback]
87 # Returns true if callbacks has yet to be generated and register it as being generated
88 private fun check_callback_compilation
(cb
: NitniCallback): Bool
90 var compiled
= compiled_callbacks
.has
(cb
)
91 if not compiled
then compiled_callbacks
.add
(cb
)
96 redef class AMethPropdef
97 private fun compile_ffi_support_to_c
(v
: AbstractCompilerVisitor)
99 var mmodule
= mpropdef
.mclassdef
.mmodule
100 var mainmodule
= v
.compiler
.mainmodule
101 var amainmodule
= v
.compiler
.modelbuilder
.mmodule2nmodule
[mainmodule
]
102 var amodule
= v
.compiler
.modelbuilder
.mmodule2nmodule
[mmodule
]
103 var mclass_type
= mpropdef
.mclassdef
.bound_mtype
106 var csignature
= mpropdef
.mproperty
.build_csignature
(mclass_type
, mmodule
, "___impl", long_signature
, internal_call_context
)
107 v
.declare_once
("{csignature};")
110 amodule
.ensure_compile_ffi_wrapper
111 compile_ffi_method
(mmodule
)
113 # nitni - Compile missing callbacks
114 mmodule
.ensure_compile_nitni_base
(v
)
115 var ccu
= mmodule
.nitni_ccu
.as(not null)
117 for mtype
in foreign_callbacks
.types
do
118 if not mtype
.is_cprimitive
then
119 mtype
.compile_extern_type
(v
, ccu
)
121 # has callbacks already been compiled? (this may very well happen with global compilation)
122 if mmodule
.check_callback_compilation
(mtype
) then mtype
.compile_extern_helper_functions
(v
, ccu
)
127 for cb
in foreign_callbacks
.callbacks
do if mainmodule
.check_callback_compilation
(cb
) then
128 cb
.compile_extern_callback
(v
, ccu
)
131 for cb
in foreign_callbacks
.supers
do if mainmodule
.check_callback_compilation
(cb
) then
132 cb
.compile_extern_callback
(v
, ccu
)
135 for cb
in foreign_callbacks
.casts
do if mainmodule
.check_callback_compilation
(cb
) then
136 cb
.compile_extern_callbacks
(v
, ccu
)
139 # manage nitni callback set
140 mmodule
.foreign_callbacks
.join
(foreign_callbacks
)
143 redef fun compile_externmeth_to_c
(v
, mpropdef
, arguments
)
145 # if using the old native interface fallback on previous implementation
146 if n_extern_code_block
== null then return super
148 var mmodule
= mpropdef
.mclassdef
.mmodule
149 mmodule
.uses_ffi
= true
151 var mclass_type
= mpropdef
.mclassdef
.bound_mtype
153 # Outgoing code in compiler
154 var externname
= mpropdef
.mproperty
.build_cname
(mpropdef
.mclassdef
.bound_mtype
, mmodule
, "___impl", long_signature
)
155 var recv_var
: nullable RuntimeVariable = null
156 var return_mtype
= mpropdef
.msignature
.return_mtype
157 if return_mtype
!= null then
158 return_mtype
= return_mtype
.anchor_to
(mmodule
, mclass_type
)
159 recv_var
= v
.new_var
(return_mtype
)
162 v
.adapt_signature
(mpropdef
, arguments
)
163 v
.unbox_signature_extern
(mpropdef
, arguments
)
165 var arguments_for_c
= new Array[String]
166 for a
in [0..arguments
.length
[ do
167 var arg
= arguments
[a
]
168 var param_mtype
: MType
170 param_mtype
= mpropdef
.mclassdef
.mclass
.mclass_type
171 else param_mtype
= mpropdef
.msignature
.mparameters
[a-1
].mtype
173 param_mtype
= param_mtype
.anchor_to
(mmodule
, mclass_type
)
175 if param_mtype
.is_cprimitive
then
176 arguments_for_c
.add
(arg
.name
)
178 v
.add
("struct nitni_instance* var_for_c_{a};")
179 v
.add
("var_for_c_{a} = nit_alloc(sizeof(struct nitni_instance));")
180 v
.add
("var_for_c_{a}->value = {arg.name};")
181 arguments_for_c
.add
("var_for_c_{a}")
185 if recv_var
== null then
186 v
.add
("{externname}({arguments_for_c.join(", ")});")
188 assert return_mtype
!= null
189 if return_mtype
.is_cprimitive
then
190 v
.add
("{recv_var} = {externname}({arguments_for_c.join(", ")});")
192 v
.add
("struct nitni_instance* ret_var;")
193 v
.add
("ret_var = {externname}({arguments_for_c.join(", ")});")
194 v
.add
("{recv_var} = ret_var->value;")
196 recv_var
= v
.box_extern
(recv_var
, return_mtype
)
200 compile_ffi_support_to_c
(v
)
204 redef fun compile_externinit_to_c
(v
, mpropdef
, arguments
)
206 # if using the old native interface fallback on previous implementation
207 if n_extern_code_block
== null then return super
209 var mmodule
= mpropdef
.mclassdef
.mmodule
210 mmodule
.uses_ffi
= true
212 var mclass_type
= mpropdef
.mclassdef
.bound_mtype
214 var externname
= mpropdef
.mproperty
.build_cname
(mpropdef
.mclassdef
.bound_mtype
, mmodule
, "___impl", long_signature
)
215 var return_mtype
= arguments
.first
.mtype
216 var recv_var
= v
.new_var
(return_mtype
)
218 v
.adapt_signature
(mpropdef
, arguments
)
219 v
.unbox_signature_extern
(mpropdef
, arguments
)
223 var arguments_for_c
= new Array[String]
224 for a
in [0..arguments
.length
[ do
225 var arg
= arguments
[a
]
226 var param_mtype
: MType
227 param_mtype
= mpropdef
.msignature
.mparameters
[a
].mtype
228 param_mtype
= param_mtype
.anchor_to
(mmodule
, mclass_type
)
230 if param_mtype
.is_cprimitive
then
231 arguments_for_c
.add
(arg
.name
)
233 v
.add
("struct nitni_instance* var_for_c_{a};")
234 v
.add
("var_for_c_{a} = nit_alloc(sizeof(struct nitni_instance));")
235 v
.add
("var_for_c_{a}->value = {arg.name};")
236 arguments_for_c
.add
("var_for_c_{a}")
240 if return_mtype
.is_cprimitive
then
241 v
.add
("{recv_var} = {externname}({arguments_for_c.join(", ")});")
243 v
.add
("struct nitni_instance* ret_var;")
244 v
.add
("ret_var = {externname}({arguments_for_c.join(", ")});")
245 v
.add
("{recv_var} = ret_var->value;")
247 recv_var
= v
.box_extern
(recv_var
, return_mtype
)
250 compile_ffi_support_to_c
(v
)
255 redef class CCompilationUnit
256 fun write_as_nitni
(mmodule
: MModule, compdir
: String)
258 var base_name
= "{mmodule.name}._nitni"
260 var h_file
= "{base_name}.h"
261 write_header_to_file
( mmodule
, "{compdir}/{h_file}", new Array[String],
262 "{mmodule.cname.to_s.to_upper}_NITG_NITNI_H")
264 var c_file
= "{base_name}.c"
265 write_body_to_file
( mmodule
, "{compdir}/{c_file}", ["\"{h_file}\
""] )
267 files
.add
( "{compdir}/{c_file}" )
271 redef class AbstractCompiler
272 # Cache to avoid multiple compilation of NULL values
273 # see FIXME in `MNullableType#compile_extern_helper_functions`
274 private var compiled_null_types
= new Array[MNullableType]
277 redef class AbstractCompilerVisitor
278 # Create a `RuntimeVariable` for this C variable originating from C user code
279 private fun var_from_c
(name
: String, mtype
: MType): RuntimeVariable
281 if mtype
.is_cprimitive
then
282 return new RuntimeVariable(name
, mtype
, mtype
)
284 return new RuntimeVariable("{name}->value", mtype
, mtype
)
288 # Return a `RuntimeVarible` to C user code
289 private fun ret_to_c
(src
: RuntimeVariable, mtype
: MType)
291 if mtype
.is_cprimitive
then
294 add
("struct nitni_instance* ret_for_c;")
295 add
("ret_for_c = nit_alloc(sizeof(struct nitni_instance));")
296 add
("ret_for_c->value = {src};")
297 add
("return ret_for_c;")
303 private fun compile_extern_type
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
305 assert not is_cprimitive
307 # define friendly type
308 ccu
.header_c_types
.add
("#ifndef NIT_TYPE_{cname}\n")
309 ccu
.header_c_types
.add
("#define NIT_TYPE_{cname} 1\n")
310 ccu
.header_c_types
.add
("typedef struct nitni_instance *{cname};\n")
311 ccu
.header_c_types
.add
("#endif\n")
314 private fun compile_extern_helper_functions
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
316 # actually, we do not need to do anything when using the bohem garbage collector
317 var call_context
= from_c_call_context
320 ccu
.header_decl
.add
"#ifndef {mangled_cname}_incr_ref\n"
321 ccu
.header_decl
.add
" #define {mangled_cname}_incr_ref(from) nitni_global_ref_incr(({call_context.name_mtype(self)})(from))\n"
322 ccu
.header_decl
.add
"#endif\n"
325 ccu
.header_decl
.add
"#ifndef {mangled_cname}_decr_ref\n"
326 ccu
.header_decl
.add
" #define {mangled_cname}_decr_ref(from) nitni_global_ref_decr(({call_context.name_mtype(self)})(from))\n"
327 ccu
.header_decl
.add
"#endif\n"
331 redef class MNullableType
332 redef fun compile_extern_helper_functions
(v
, ccu
)
336 var base_cname
= "null_{mtype.mangled_cname}"
337 var full_cname
= "NIT_NULL___{base_cname}"
339 # In nitni files, declare internal function as extern
340 var full_friendly_csignature
= "{cname_blind} {full_cname}()"
341 ccu
.header_decl
.add
("extern {full_friendly_csignature};\n")
343 # In nitni files, #define friendly as extern
344 ccu
.header_decl
.add
("#define {base_cname} {full_cname}\n")
346 # FIXME: This is ugly an broke the separate compilation principle
347 # The real function MUST be compiled only once, #define pragma only protect the compiler, not the loader
348 # However, I am not sure of the right approach here (eg. week refs are ugly)
349 if v
.compiler
.compiled_null_types
.has
(self) then return
350 v
.compiler
.compiled_null_types
.add
self
352 # Internally, implement internal function
353 var nitni_visitor
= v
.compiler
.new_visitor
354 nitni_visitor
.frame
= v
.frame
355 var full_internal_csignature
= "{cname_blind} {full_cname}()"
356 nitni_visitor
.add
("{full_internal_csignature} \{")
357 nitni_visitor
.add
("struct nitni_instance* ret_for_c;")
358 nitni_visitor
.add
("ret_for_c = nit_alloc(sizeof(struct nitni_instance));")
359 nitni_visitor
.add
("ret_for_c->value = NULL;")
360 nitni_visitor
.add
("return ret_for_c;")
361 nitni_visitor
.add
("\}")
365 redef class MExplicitCall
366 private fun compile_extern_callback
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
368 var mproperty
= mproperty
369 assert mproperty
isa MMethod
371 # In nitni files, declare internal function as extern
372 var full_friendly_csignature
= mproperty
.build_csignature
(recv_mtype
, v
.compiler
.mainmodule
, null, long_signature
, internal_call_context
)
373 ccu
.header_decl
.add
("extern {full_friendly_csignature};\n")
375 # Internally, implement internal function
376 var nitni_visitor
= v
.compiler
.new_visitor
377 nitni_visitor
.frame
= v
.frame
378 var msignature
= mproperty
.lookup_first_definition
(v
.compiler
.mainmodule
, recv_mtype
).msignature
379 var csignature_blind
= mproperty
.build_csignature
(recv_mtype
, v
.compiler
.mainmodule
, null, long_signature
, internal_call_context
)
381 nitni_visitor
.add_decl
("/* nitni callback for {mproperty.full_name} */")
382 nitni_visitor
.add_decl
("{csignature_blind} \{")
384 var vars
= new Array[RuntimeVariable]
385 var mtype
: MType = recv_mtype
387 if mproperty
.is_init
then
388 var recv_mtype
= recv_mtype
389 recv_var
= nitni_visitor
.init_instance
(recv_mtype
)
390 nitni_visitor
.add
("{mtype.ctype} recv /* var self: {mtype} */;")
391 nitni_visitor
.add
("recv = {recv_var};")
393 mtype
= mtype
.anchor_to
(v
.compiler
.mainmodule
, recv_mtype
)
394 recv_var
= nitni_visitor
.var_from_c
("recv", mtype
)
395 recv_var
= nitni_visitor
.box_extern
(recv_var
, mtype
)
400 for p
in msignature
.mparameters
do
401 var arg_mtype
= p
.mtype
.anchor_to
(v
.compiler
.mainmodule
, recv_mtype
)
402 var arg
= nitni_visitor
.var_from_c
(p
.name
, arg_mtype
)
403 arg
= nitni_visitor
.box_extern
(arg
, arg_mtype
)
407 var ret_var
= nitni_visitor
.send
(mproperty
, vars
)
409 var return_mtype
= msignature
.return_mtype
410 if mproperty
.is_init
then
411 if recv_mtype
.mclass
.kind
!= extern_kind
then ret_var
= recv_var
412 return_mtype
= recv_mtype
414 if return_mtype
!= null then
415 assert ret_var
!= null
416 return_mtype
= return_mtype
.anchor_to
(v
.compiler
.mainmodule
, recv_mtype
)
417 ret_var
= nitni_visitor
.autobox
(ret_var
, return_mtype
)
418 ret_var
= nitni_visitor
.unbox_extern
(ret_var
, return_mtype
)
419 nitni_visitor
.ret_to_c
(ret_var
, return_mtype
)
421 nitni_visitor
.add
("\}")
425 redef class MExplicitSuper
426 private fun compile_extern_callback
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
428 var mproperty
= from
.mproperty
429 assert mproperty
isa MMethod
430 var mclass_type
= from
.mclassdef
.mclass
.mclass_type
431 var mmodule
= from
.mclassdef
.mmodule
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")