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
21 intrude import common_ffi
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 assert self isa AExternPropdef
115 # nitni - Compile missing callbacks
116 mmodule
.ensure_compile_nitni_base
(v
)
117 var ccu
= mmodule
.nitni_ccu
.as(not null)
119 for mtype
in foreign_callbacks
.types
do
120 if not mtype
.is_cprimitive
then
121 mtype
.compile_extern_type
(v
, ccu
)
123 # has callbacks already been compiled? (this may very well happen with global compilation)
124 if mmodule
.check_callback_compilation
(mtype
) then mtype
.compile_extern_helper_functions
(v
, ccu
)
129 for cb
in foreign_callbacks
.callbacks
do if mainmodule
.check_callback_compilation
(cb
) then
130 cb
.compile_extern_callback
(v
, ccu
)
133 for cb
in foreign_callbacks
.supers
do if mainmodule
.check_callback_compilation
(cb
) then
134 cb
.compile_extern_callback
(v
, ccu
)
137 for cb
in foreign_callbacks
.casts
do if mainmodule
.check_callback_compilation
(cb
) then
138 cb
.compile_extern_callbacks
(v
, ccu
)
141 # manage nitni callback set
142 mmodule
.foreign_callbacks
.join
(foreign_callbacks
)
145 redef fun compile_externmeth_to_c
(v
, mpropdef
, arguments
)
147 var mmodule
= mpropdef
.mclassdef
.mmodule
149 # if using the old native interface fallback on previous implementation
150 var nextern
= self.n_extern
151 if nextern
!= null then
156 mmodule
.uses_ffi
= true
158 var mclass_type
= mpropdef
.mclassdef
.bound_mtype
160 # Outgoing code in compiler
161 var externname
= mpropdef
.mproperty
.build_cname
(mpropdef
.mclassdef
.bound_mtype
, mmodule
, "___impl", long_signature
)
162 var recv_var
: nullable RuntimeVariable = null
163 var return_mtype
= mpropdef
.msignature
.return_mtype
164 if return_mtype
!= null then
165 return_mtype
= return_mtype
.anchor_to
(mmodule
, mclass_type
)
166 recv_var
= v
.new_var
(return_mtype
)
169 v
.adapt_signature
(mpropdef
, arguments
)
171 var arguments_for_c
= new Array[String]
172 for a
in [0..arguments
.length
[ do
173 var arg
= arguments
[a
]
174 var param_mtype
: MType
176 param_mtype
= mpropdef
.mclassdef
.mclass
.mclass_type
177 else param_mtype
= mpropdef
.msignature
.mparameters
[a-1
].mtype
179 param_mtype
= param_mtype
.anchor_to
(mmodule
, mclass_type
)
181 if param_mtype
.is_cprimitive
then
182 arguments_for_c
.add
(arg
.name
)
184 v
.add
("struct nitni_instance* var_for_c_{a};")
185 v
.add
("var_for_c_{a} = nit_alloc(sizeof(struct nitni_instance));")
186 v
.add
("var_for_c_{a}->value = {arg.name};")
187 arguments_for_c
.add
("var_for_c_{a}")
191 if recv_var
== null then
192 v
.add
("{externname}({arguments_for_c.join(", ")});")
194 assert return_mtype
!= null
195 if return_mtype
.is_cprimitive
then
196 v
.add
("{recv_var} = {externname}({arguments_for_c.join(", ")});")
198 v
.add
("struct nitni_instance* ret_var;")
199 v
.add
("ret_var = {externname}({arguments_for_c.join(", ")});")
200 v
.add
("{recv_var} = ret_var->value;")
205 compile_ffi_support_to_c
(v
)
208 redef fun compile_externinit_to_c
(v
, mpropdef
, arguments
)
210 var mmodule
= mpropdef
.mclassdef
.mmodule
212 # if using the old native interface fallback on previous implementation
213 var nextern
= self.n_extern
214 if nextern
!= null then
219 mmodule
.uses_ffi
= true
221 var mclass_type
= mpropdef
.mclassdef
.bound_mtype
223 var externname
= mpropdef
.mproperty
.build_cname
(mpropdef
.mclassdef
.bound_mtype
, mmodule
, "___impl", long_signature
)
224 var return_mtype
= arguments
.first
.mtype
225 var recv_var
= v
.new_var
(return_mtype
)
227 v
.adapt_signature
(mpropdef
, arguments
)
231 var arguments_for_c
= new Array[String]
232 for a
in [0..arguments
.length
[ do
233 var arg
= arguments
[a
]
234 var param_mtype
: MType
235 param_mtype
= mpropdef
.msignature
.mparameters
[a
].mtype
236 param_mtype
= param_mtype
.anchor_to
(mmodule
, mclass_type
)
238 if param_mtype
.is_cprimitive
then
239 arguments_for_c
.add
(arg
.name
)
241 v
.add
("struct nitni_instance* var_for_c_{a};")
242 v
.add
("var_for_c_{a} = nit_alloc(sizeof(struct nitni_instance));")
243 v
.add
("var_for_c_{a}->value = {arg.name};")
244 arguments_for_c
.add
("var_for_c_{a}")
248 if return_mtype
.is_cprimitive
then
249 v
.add
("{recv_var} = {externname}({arguments_for_c.join(", ")});")
251 v
.add
("struct nitni_instance* ret_var;")
252 v
.add
("ret_var = {externname}({arguments_for_c.join(", ")});")
253 v
.add
("{recv_var} = ret_var->value;")
257 compile_ffi_support_to_c
(v
)
261 redef class CCompilationUnit
262 fun write_as_nitni
(mmodule
: MModule, compdir
: String)
264 var base_name
= "{mmodule.name}._nitni"
266 var h_file
= "{base_name}.h"
267 write_header_to_file
( mmodule
, "{compdir}/{h_file}", new Array[String],
268 "{mmodule.cname.to_s.to_upper}_NITG_NITNI_H")
270 var c_file
= "{base_name}.c"
271 write_body_to_file
( mmodule
, "{compdir}/{c_file}", ["\"{h_file}\
""] )
273 files
.add
( "{compdir}/{c_file}" )
277 redef class AbstractCompiler
278 # Cache to avoid multiple compilation of NULL values
279 # see FIXME in `MNullableType#compile_extern_helper_functions`
280 private var compiled_null_types
= new Array[MNullableType]
283 redef class AbstractCompilerVisitor
284 # Create a `RuntimeVariable` for this C variable originating from C user code
285 private fun var_from_c
(name
: String, mtype
: MType): RuntimeVariable
287 if mtype
.is_cprimitive
then
288 return new RuntimeVariable(name
, mtype
, mtype
)
290 return new RuntimeVariable("{name}->value", mtype
, mtype
)
294 # Return a `RuntimeVarible` to C user code
295 private fun ret_to_c
(src
: RuntimeVariable, mtype
: MType)
297 if mtype
.is_cprimitive
then
300 add
("struct nitni_instance* ret_for_c;")
301 add
("ret_for_c = nit_alloc(sizeof(struct nitni_instance));")
302 add
("ret_for_c->value = {src};")
303 add
("return ret_for_c;")
309 private fun compile_extern_type
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
311 assert not is_cprimitive
313 # define friendly type
314 ccu
.header_c_types
.add
("#ifndef NIT_TYPE_{cname}\n")
315 ccu
.header_c_types
.add
("#define NIT_TYPE_{cname} 1\n")
316 ccu
.header_c_types
.add
("typedef struct nitni_instance *{cname};\n")
317 ccu
.header_c_types
.add
("#endif\n")
320 private fun compile_extern_helper_functions
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
322 # actually, we do not need to do anything when using the bohem garbage collector
323 var call_context
= from_c_call_context
326 ccu
.header_decl
.add
"#ifndef {mangled_cname}_incr_ref\n"
327 ccu
.header_decl
.add
" #define {mangled_cname}_incr_ref(from) nitni_global_ref_incr(({call_context.name_mtype(self)})(from))\n"
328 ccu
.header_decl
.add
"#endif\n"
331 ccu
.header_decl
.add
"#ifndef {mangled_cname}_decr_ref\n"
332 ccu
.header_decl
.add
" #define {mangled_cname}_decr_ref(from) nitni_global_ref_decr(({call_context.name_mtype(self)})(from))\n"
333 ccu
.header_decl
.add
"#endif\n"
337 redef class MNullableType
338 redef fun compile_extern_helper_functions
(v
, ccu
)
342 var base_cname
= "null_{mtype.mangled_cname}"
343 var full_cname
= "NIT_NULL___{base_cname}"
345 # In nitni files, declare internal function as extern
346 var full_friendly_csignature
= "{cname_blind} {full_cname}()"
347 ccu
.header_decl
.add
("extern {full_friendly_csignature};\n")
349 # In nitni files, #define friendly as extern
350 ccu
.header_decl
.add
("#define {base_cname} {full_cname}\n")
352 # FIXME: This is ugly an broke the separate compilation principle
353 # The real function MUST be compiled only once, #define pragma only protect the compiler, not the loader
354 # However, I am not sure of the right approach here (eg. week refs are ugly)
355 if v
.compiler
.compiled_null_types
.has
(self) then return
356 v
.compiler
.compiled_null_types
.add
self
358 # Internally, implement internal function
359 var nitni_visitor
= v
.compiler
.new_visitor
360 nitni_visitor
.frame
= v
.frame
361 var full_internal_csignature
= "{cname_blind} {full_cname}()"
362 nitni_visitor
.add
("{full_internal_csignature} \{")
363 nitni_visitor
.add
("struct nitni_instance* ret_for_c;")
364 nitni_visitor
.add
("ret_for_c = nit_alloc(sizeof(struct nitni_instance));")
365 nitni_visitor
.add
("ret_for_c->value = NULL;")
366 nitni_visitor
.add
("return ret_for_c;")
367 nitni_visitor
.add
("\}")
371 redef class MExplicitCall
372 private fun compile_extern_callback
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
374 var mproperty
= mproperty
375 assert mproperty
isa MMethod
377 # In nitni files, declare internal function as extern
378 var full_friendly_csignature
= mproperty
.build_csignature
(recv_mtype
, v
.compiler
.mainmodule
, null, long_signature
, internal_call_context
)
379 ccu
.header_decl
.add
("extern {full_friendly_csignature};\n")
381 # Internally, implement internal function
382 var nitni_visitor
= v
.compiler
.new_visitor
383 nitni_visitor
.frame
= v
.frame
384 var msignature
= mproperty
.lookup_first_definition
(v
.compiler
.mainmodule
, recv_mtype
).msignature
385 var csignature_blind
= mproperty
.build_csignature
(recv_mtype
, v
.compiler
.mainmodule
, null, long_signature
, internal_call_context
)
387 nitni_visitor
.add_decl
("/* nitni callback for {mproperty.full_name} */")
388 nitni_visitor
.add_decl
("{csignature_blind} \{")
390 var vars
= new Array[RuntimeVariable]
391 var mtype
: MType = recv_mtype
393 if mproperty
.is_init
then
394 if recv_mtype
.mclass
.kind
== extern_kind
then
395 recv_var
= nitni_visitor
.new_var
(mtype
)
397 var recv_mtype
= recv_mtype
398 recv_var
= nitni_visitor
.init_instance
(recv_mtype
)
399 nitni_visitor
.add
("{mtype.ctype} recv /* var self: {mtype} */;")
400 nitni_visitor
.add
("recv = {recv_var};")
403 mtype
= mtype
.anchor_to
(v
.compiler
.mainmodule
, recv_mtype
)
404 recv_var
= nitni_visitor
.var_from_c
("recv", mtype
)
409 for p
in msignature
.mparameters
do
410 var arg_mtype
= p
.mtype
.anchor_to
(v
.compiler
.mainmodule
, recv_mtype
)
411 var arg
= nitni_visitor
.var_from_c
(p
.name
, arg_mtype
)
415 var ret_var
= nitni_visitor
.send
(mproperty
, vars
)
417 var return_mtype
= msignature
.return_mtype
418 if mproperty
.is_init
then
419 if recv_mtype
.mclass
.kind
!= extern_kind
then ret_var
= recv_var
420 return_mtype
= recv_mtype
422 if return_mtype
!= null then
423 assert ret_var
!= null
424 return_mtype
= return_mtype
.anchor_to
(v
.compiler
.mainmodule
, recv_mtype
)
425 ret_var
= nitni_visitor
.autobox
(ret_var
, return_mtype
)
426 nitni_visitor
.ret_to_c
(ret_var
, return_mtype
)
428 nitni_visitor
.add
("\}")
432 redef class MExplicitSuper
433 private fun compile_extern_callback
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
435 var mproperty
= from
.mproperty
436 assert mproperty
isa MMethod
437 var mclass_type
= from
.mclassdef
.mclass
.mclass_type
438 var mmodule
= from
.mclassdef
.mmodule
440 # In nitni files, declare internal function as extern
441 var internal_csignature
= mproperty
.build_csignature
(mclass_type
, v
.compiler
.mainmodule
, "___super", long_signature
, internal_call_context
)
442 ccu
.header_decl
.add
("extern {internal_csignature};\n")
444 # In nitni files, #define friendly as extern
445 var friendly_cname
= mproperty
.build_cname
(mclass_type
, v
.compiler
.mainmodule
, "___super", short_signature
)
446 var internal_cname
= mproperty
.build_cname
(mclass_type
, v
.compiler
.mainmodule
, "___super", long_signature
)
447 ccu
.header_decl
.add
("#define {friendly_cname} {internal_cname}\n")
449 # Internally, implement internal function
450 var nitni_visitor
= v
.compiler
.new_visitor
451 nitni_visitor
.frame
= v
.frame
452 var msignature
= mproperty
.lookup_first_definition
(v
.compiler
.mainmodule
, mclass_type
).msignature
454 var csignature_blind
= mproperty
.build_csignature
(mclass_type
, v
.compiler
.mainmodule
, "___super", long_signature
, internal_call_context
)
456 nitni_visitor
.add_decl
("/* nitni callback to super for {mproperty.full_name} */")
457 nitni_visitor
.add_decl
("{csignature_blind} \{")
459 var vars
= new Array[RuntimeVariable]
461 var recv_var
= nitni_visitor
.var_from_c
("recv", mclass_type
)
464 for p
in msignature
.mparameters
do
465 var arg_mtype
= v
.anchor
(p
.mtype
)
466 var arg
= nitni_visitor
.var_from_c
(p
.name
, arg_mtype
)
470 var ret_var
= nitni_visitor
.supercall
(from
.as(MMethodDef), mclass_type
, vars
)
472 var return_mtype
= msignature
.return_mtype
473 if return_mtype
!= null then
474 assert ret_var
!= null
475 return_mtype
= v
.anchor
(return_mtype
)
476 nitni_visitor
.ret_to_c
(ret_var
, return_mtype
)
478 nitni_visitor
.add
("\}")
482 redef class MExplicitCast
483 private fun compile_extern_callbacks
(v
: AbstractCompilerVisitor, ccu
: CCompilationUnit)
492 # In nitni files, declare internal function as extern
493 var full_friendly_csignature
= "int {v.compiler.mainmodule.name }___{from.mangled_cname}_is_a_{to.mangled_cname}({from.cname_blind})"
494 ccu
.header_decl
.add
("extern {full_friendly_csignature};\n")
496 # In nitni files, #define friendly as extern
497 ccu
.header_decl
.add
("#define {check_cname} {v.compiler.mainmodule.name}___{check_cname}\n")
499 # Internally, implement internal function
500 var nitni_visitor
= v
.compiler
.new_visitor
501 nitni_visitor
.frame
= v
.frame
503 var full_internal_csignature
= "int {v.compiler.mainmodule.name }___{from.mangled_cname}_is_a_{to.mangled_cname}({from.cname_blind} from)"
504 nitni_visitor
.add_decl
("/* nitni check for {from} to {to} */")
505 nitni_visitor
.add_decl
("{full_internal_csignature} \{")
507 var from_var
= new RuntimeVariable("from->value", from
, 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}({from.cname_blind} 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
)
541 var check
= nitni_visitor
.type_test
(from_var
, to
, "FFI cast")
542 nitni_visitor
.add
("if (!{check}) \{")
543 nitni_visitor
.add_abort
("FFI cast failed")
544 nitni_visitor
.add
("\}")
547 recv_var
= nitni_visitor
.autobox
(from_var
, to
)
549 nitni_visitor
.ret_to_c
(recv_var
, to
)
551 nitni_visitor
.add
("\}")
554 if from
.as_nullable
== to
then
555 # format A_as_nullable
556 ccu
.header_decl
.add
("#define {from.mangled_cname}_as_nullable {from.mangled_cname}_as_{to.mangled_cname}\n")
559 if from
== to
.as_nullable
then
560 # format A_as_nullable
561 ccu
.header_decl
.add
("#define {to.mangled_cname}_as_not_nullable {from.mangled_cname}_as_{to.mangled_cname}\n")