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x/ffi: wrap c/ffi

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This commit is contained in:
visualfc
2024-10-23 11:44:34 +08:00
parent 92c267758e
commit 363be18599
15 changed files with 435 additions and 224 deletions
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49
c/ffi/_demo/closure/main.go
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@@ -34,6 +34,11 @@ func demo(a array) c.Int {
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"))
@@ -41,38 +46,48 @@ func main() {
}
func gofn() {
sig, err := ffi.NewSignature(ffi.TypeInt32, ffi.TypePointer)
if err != nil {
panic(err)
var cif ffi.Cif
status := ffi.PrepCif(&cif, ffi.DefaultAbi, 1, typeInt32, &[]*ffi.Type{typePointer}[0])
if status != ffi.OK {
panic(status)
}
closure := ffi.NewClosure()
defer closure.Free()
err = closure.Bind(sig, func(cif *ffi.Signature, ret unsafe.Pointer, args *unsafe.Pointer, userdata unsafe.Pointer) {
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)
}, nil, fncode)
if status != ffi.OK {
panic(status)
}
var ret int32
ffi.Call(sig, c.Func(demo2), unsafe.Pointer(&ret), unsafe.Pointer(&closure.Fn))
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() {
sig, err := ffi.NewSignature(ffi.TypeInt32, ffi.TypePointer)
if err != nil {
panic(err)
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"), sig.NArgs)
c.Printf(c.Str("call closure %d\n"), cif.NArgs)
return demo(ar)
}
closure := ffi.NewClosure()
defer closure.Free()
err = closure.Bind(sig, func(cif *ffi.Signature, ret unsafe.Pointer, args *unsafe.Pointer, userdata unsafe.Pointer) {
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))
}, unsafe.Pointer(&fn), fncode)
if status != ffi.OK {
panic(status)
}
var ret int32
ffi.Call(sig, c.Func(demo2), unsafe.Pointer(&ret), unsafe.Pointer(&closure.Fn))
ffi.Call(&cif, c.Func(demo2), unsafe.Pointer(&ret), &[]unsafe.Pointer{unsafe.Pointer(&fncode)}[0])
c.Printf(c.Str("ret: %d\n"), ret)
}