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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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24
c/ffi/_demo/cfunc/main.go
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@@ -29,29 +29,37 @@ type array struct {
k c.Int
}
var (
typeInt32 = &ffi.Type{4, 4, ffi.Sint32, nil}
typePointer = &ffi.Type{unsafe.Sizeof(0), uint16(unsafe.Alignof(0)), ffi.Pointer, nil}
)
func main() {
cdemo1()
cdemo2()
}
func cdemo1() {
sig, err := ffi.NewSignature(ffi.TypeInt32, ffi.StructOf(ffi.TypeInt32, ffi.TypeInt32, ffi.TypeInt32, ffi.TypeInt32))
if err != nil {
panic(err)
var cif ffi.Cif
tarray := &ffi.Type{0, 0, ffi.Struct, &[]*ffi.Type{typeInt32, typeInt32, typeInt32, typeInt32, nil}[0]}
status := ffi.PrepCif(&cif, ffi.DefaultAbi, 1, typeInt32, &[]*ffi.Type{tarray}[0])
if status != ffi.OK {
panic(status)
}
ar := array{1, 2, 3, 4}
var ret int32
ffi.Call(sig, c.Func(demo1), unsafe.Pointer(&ret), unsafe.Pointer(&ar))
ffi.Call(&cif, c.Func(demo1), unsafe.Pointer(&ret), &[]unsafe.Pointer{unsafe.Pointer(&ar)}[0])
c.Printf(c.Str("ret: %d\n"), ret)
}
func cdemo2() {
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)
}
var ret int32
fn := c.Func(demo1)
ffi.Call(sig, c.Func(demo2), unsafe.Pointer(&ret), unsafe.Pointer(&fn))
ffi.Call(&cif, c.Func(demo2), unsafe.Pointer(&ret), &[]unsafe.Pointer{unsafe.Pointer(&fn)}[0])
c.Printf(c.Str("ret: %d\n"), ret)
}