58 lines
1008 B
Go
58 lines
1008 B
Go
package main
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import (
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"unsafe"
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"github.com/goplus/llgo/c"
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"github.com/goplus/llgo/c/ffi"
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)
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const (
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LLGoPackage = "link"
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LLGoFiles = "../_wrap/wrap.c"
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)
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//llgo:type C
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type Callback func(array) c.Int
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//go:linkname demo1 C.demo1
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func demo1(array) c.Int
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//go:linkname demo2 C.demo2
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func demo2(fn Callback) c.Int
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//llgo:type C
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type array struct {
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x c.Int
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y c.Int
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z c.Int
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k c.Int
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}
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func main() {
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cdemo1()
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cdemo2()
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}
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func cdemo1() {
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sig, err := ffi.NewSignature(ffi.TypeInt32, ffi.StructOf(ffi.TypeInt32, ffi.TypeInt32, ffi.TypeInt32, ffi.TypeInt32))
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if err != nil {
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panic(err)
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}
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ar := array{1, 2, 3, 4}
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var ret int32
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ffi.Call(sig, c.Func(demo1), unsafe.Pointer(&ret), unsafe.Pointer(&ar))
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c.Printf(c.Str("ret: %d\n"), ret)
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}
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func cdemo2() {
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sig, err := ffi.NewSignature(ffi.TypeInt32, ffi.TypePointer)
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if err != nil {
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panic(err)
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}
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var ret int32
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fn := c.Func(demo1)
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ffi.Call(sig, c.Func(demo2), unsafe.Pointer(&ret), unsafe.Pointer(&fn))
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c.Printf(c.Str("ret: %d\n"), ret)
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}
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