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Handle native callbacks with return value

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This commit is contained in:
Olivier Goffart 2021-01-26 17:01:54 +01:00
parent e0e3a1aaad
commit 2e23b5bbdd
6 changed files with 77 additions and 48 deletions
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21
api/sixtyfps-cpp/include/sixtyfps_callbacks.h
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@ -28,9 +28,9 @@ struct Callback<Ret(Arg...)>
{
cbindgen_private::sixtyfps_callback_set_handler(
&inner,
[](void *user_data, const void *arg) {
auto *p = reinterpret_cast<const Pair*>(arg);
*p->first = std::apply(*reinterpret_cast<F *>(user_data), p->second);
[](void *user_data, const void *arg, void *ret) {
*reinterpret_cast<Ret*>(ret) = std::apply(*reinterpret_cast<F *>(user_data),
*reinterpret_cast<const Tuple*>(arg));
},
new F(std::move(binding)),
[](void *user_data) { delete reinterpret_cast<F *>(user_data); });
@ -39,14 +39,13 @@ struct Callback<Ret(Arg...)>
Ret call(const Arg &...arg) const
{
Ret r{};
Pair p = std::pair{ &r, Tuple{arg...} };
cbindgen_private::sixtyfps_callback_call(&inner, &p);
Tuple tuple{arg...};
cbindgen_private::sixtyfps_callback_call(&inner, &tuple, &r);
return r;
}
private:
using Tuple = std::tuple<Arg...>;
using Pair = std::pair<Ret *, Tuple>;
cbindgen_private::CallbackOpaque inner;
};
@ -65,7 +64,7 @@ struct Callback<void(Arg...)>
{
cbindgen_private::sixtyfps_callback_set_handler(
&inner,
[](void *user_data, const void *arg) {
[](void *user_data, const void *arg, void *) {
std::apply(*reinterpret_cast<F *>(user_data),
*reinterpret_cast<const Tuple*>(arg));
},
@ -76,7 +75,7 @@ struct Callback<void(Arg...)>
void call(const Arg &...arg) const
{
Tuple tuple{arg...};
cbindgen_private::sixtyfps_callback_call(&inner, &tuple);
cbindgen_private::sixtyfps_callback_call(&inner, &tuple, reinterpret_cast<void *>(0x1));
}
private:
@ -84,7 +83,11 @@ private:
cbindgen_private::CallbackOpaque inner;
};
template<typename A, typename R> struct CallbackSignatureHelper { using Result = R(A); };
template<typename R> struct CallbackSignatureHelper<void, R> { using Result = R(); };
template<typename A, typename R = void> using CallbackHelper =
Callback<typename CallbackSignatureHelper<A, R>::Result>;
}
} // namespace sixtyfps