94 lines
2.2 KiB
Go
94 lines
2.2 KiB
Go
package main
|
|
|
|
import (
|
|
"unsafe"
|
|
|
|
c "github.com/goplus/llgo/runtime/internal/clite"
|
|
"github.com/goplus/llgo/runtime/internal/clite/ffi"
|
|
)
|
|
|
|
const (
|
|
LLGoPackage = "link"
|
|
LLGoFiles = "../_wrap/wrap.c"
|
|
)
|
|
|
|
//llgo:type C
|
|
type Callback func(array) c.Int
|
|
|
|
//go:linkname demo1 C.demo1
|
|
func demo1(array) c.Int
|
|
|
|
//go:linkname demo2 C.demo2
|
|
func demo2(fn Callback) c.Int
|
|
|
|
//llgo:type C
|
|
type array struct {
|
|
x c.Int
|
|
y c.Int
|
|
z c.Int
|
|
k c.Int
|
|
}
|
|
|
|
func demo(a array) c.Int {
|
|
c.Printf(c.Str("go.demo %d %d %d %d\n"), a.x, a.y, a.z, a.k)
|
|
return a.x + a.y + a.z + a.k
|
|
}
|
|
|
|
var (
|
|
typeInt32 = &ffi.Type{4, 4, ffi.Sint32, nil}
|
|
typePointer = &ffi.Type{unsafe.Sizeof(0), uint16(unsafe.Alignof(0)), ffi.Pointer, nil}
|
|
)
|
|
|
|
func main() {
|
|
gofn()
|
|
c.Printf(c.Str("\n"))
|
|
goclosure()
|
|
}
|
|
|
|
func gofn() {
|
|
var cif ffi.Cif
|
|
status := ffi.PrepCif(&cif, ffi.DefaultAbi, 1, typeInt32, &[]*ffi.Type{typePointer}[0])
|
|
if status != ffi.OK {
|
|
panic(status)
|
|
}
|
|
var fncode unsafe.Pointer
|
|
closure := ffi.ClosureAlloc(&fncode)
|
|
defer ffi.ClosureFree(closure)
|
|
status = ffi.PreClosureLoc(closure, &cif, func(cif *ffi.Cif, ret unsafe.Pointer, args *unsafe.Pointer, userdata unsafe.Pointer) {
|
|
ar := *(*array)(ffi.Index(args, 0))
|
|
*(*c.Int)(ret) = demo(ar)
|
|
}, nil, fncode)
|
|
if status != ffi.OK {
|
|
panic(status)
|
|
}
|
|
var ret int32
|
|
ffi.Call(&cif, c.Func(demo2), unsafe.Pointer(&ret), &[]unsafe.Pointer{unsafe.Pointer(&fncode)}[0])
|
|
c.Printf(c.Str("ret: %d\n"), ret)
|
|
}
|
|
|
|
func goclosure() {
|
|
var cif ffi.Cif
|
|
status := ffi.PrepCif(&cif, ffi.DefaultAbi, 1, typeInt32, &[]*ffi.Type{typePointer}[0])
|
|
if status != ffi.OK {
|
|
panic(status)
|
|
}
|
|
fn := func(ar array) c.Int {
|
|
c.Printf(c.Str("call closure %d\n"), cif.NArgs)
|
|
return demo(ar)
|
|
}
|
|
var fncode unsafe.Pointer
|
|
closure := ffi.ClosureAlloc(&fncode)
|
|
defer ffi.ClosureFree(closure)
|
|
status = ffi.PreClosureLoc(closure, &cif, func(cif *ffi.Cif, ret unsafe.Pointer, args *unsafe.Pointer, userdata unsafe.Pointer) {
|
|
ar := *(*array)(ffi.Index(args, 0))
|
|
fn := *(*func(array) c.Int)(userdata)
|
|
*(*c.Int)(ret) = fn(ar)
|
|
}, unsafe.Pointer(&fn), fncode)
|
|
if status != ffi.OK {
|
|
panic(status)
|
|
}
|
|
var ret int32
|
|
ffi.Call(&cif, c.Func(demo2), unsafe.Pointer(&ret), &[]unsafe.Pointer{unsafe.Pointer(&fncode)}[0])
|
|
c.Printf(c.Str("ret: %d\n"), ret)
|
|
}
|