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https://github.com/chai2010/advanced-go-programming-book.git
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64 lines
1.0 KiB
Plaintext
64 lines
1.0 KiB
Plaintext
' Copyright 2017 <chaishushan{AT}gmail.com>. All rights reserved.
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' Use of this source code is governed by a Apache
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' license that can be found in the LICENSE file.
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@startuml
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title c call go func
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|_testmain.c|
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:int main() {
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extern int sum(int a, int b)
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sum(1, 2)
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return 0
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};
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-[#green,dashed]->
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fork
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|#AntiqueWhite|_cgo_export.c|
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:int sum(int p0, int p1) {
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struct { int p0, p1, r0; } a
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_cgo_ctxt = _cgo_wait_runtime_init_done()
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crosscall2(_cgoexp_xxx_sum, &a, 16, _cgo_ctxt)
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_cgo_release_context(_cgo_ctxt)
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return a.r0
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};
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|runtime/cgo/*.asm|
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:TEXT crosscall2(SB),NOSPLIT,$0;
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fork
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|#AntiqueWhite|_cgo_types.go|
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:func _cgoexp_xxx_sum(a unsafe.Pointer, n int32, ctxt uintptr) {
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fn := _cgoexpwrap_xxx_sum
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_cgo_runtime_cgocallback(
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_cgoexpwrap_xxx_sum,
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...
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)
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};
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|#AntiqueWhite|_cgo_types.go|
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:func _cgoexpwrap_xxx_sum(p0, p1) r0 {
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return sum(p0, p1)
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};
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|main.go|
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://export sum
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func sum(a, b C.int) C.int {
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return a + b
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};
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endfork
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|runtime/cgo/*.asm|
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:TEXT crosscall2(SB),NOSPLIT,$0;
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endfork
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|_testmain.c|
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stop
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@enduml
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