IPC: Add Pop/PushObjects methods to RequestParser/Builder
These use the context functions to create and look-up handles for the user.
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1c4b0ebb1f
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21436f5ef7
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@ -4,6 +4,10 @@
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#pragma once
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#include <array>
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#include <tuple>
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#include <type_traits>
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#include <utility>
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#include "core/hle/ipc.h"
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#include "core/hle/kernel/handle_table.h"
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#include "core/hle/kernel/hle_ipc.h"
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@ -105,6 +109,9 @@ public:
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template <typename... H>
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void PushMoveHandles(H... handles);
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template <typename... O>
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void PushObjects(Kernel::SharedPtr<O>... pointers);
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void PushCurrentPIDHandle();
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void PushStaticBuffer(VAddr buffer_vaddr, u32 size, u8 buffer_id);
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@ -170,6 +177,11 @@ inline void RequestBuilder::PushMoveHandles(H... handles) {
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Push(static_cast<Kernel::Handle>(handles)...);
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}
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template <typename... O>
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inline void RequestBuilder::PushObjects(Kernel::SharedPtr<O>... pointers) {
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PushMoveHandles(context->AddOutgoingHandle(std::move(pointers))...);
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}
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inline void RequestBuilder::PushCurrentPIDHandle() {
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Push(CallingPidDesc());
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Push(u32(0));
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@ -229,10 +241,52 @@ public:
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template <typename First, typename... Other>
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void Pop(First& first_value, Other&... other_values);
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/// Equivalent to calling `PopHandles<1>()[0]`.
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Kernel::Handle PopHandle();
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/**
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* Pops a descriptor containing `N` handles. The handles are returned as an array. The
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* descriptor must contain exactly `N` handles, it is not permitted to, for example, call
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* PopHandles<1>() twice to read a multi-handle descriptor with 2 handles, or to make a single
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* PopHandles<2>() call to read 2 single-handle descriptors.
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*/
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template <unsigned int N>
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std::array<Kernel::Handle, N> PopHandles();
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/// Convenience wrapper around PopHandles() which assigns the handles to the passed references.
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template <typename... H>
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void PopHandles(H&... handles);
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void PopHandles(H&... handles) {
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std::tie(handles...) = PopHandles<sizeof...(H)>();
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}
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/// Equivalent to calling `PopGenericObjects<1>()[0]`.
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Kernel::SharedPtr<Kernel::Object> PopGenericObject();
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/// Equivalent to calling `std::get<0>(PopObjects<T>())`.
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template <typename T>
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Kernel::SharedPtr<T> PopObject();
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/**
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* Pop a descriptor containing `N` handles and resolves them to Kernel::Object pointers. If a
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* handle is invalid, null is returned for that object instead. The same caveats from
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* PopHandles() apply regarding `N` matching the number of handles in the descriptor.
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*/
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template <unsigned int N>
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std::array<Kernel::SharedPtr<Kernel::Object>, N> PopGenericObjects();
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/**
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* Resolves handles to Kernel::Objects as in PopGenericsObjects(), but then also casts them to
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* the passed `T` types, while verifying that the cast is valid. If the type of an object does
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* not match, null is returned instead.
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*/
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template <typename... T>
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std::tuple<Kernel::SharedPtr<T>...> PopObjects();
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/// Convenience wrapper around PopObjects() which assigns the handles to the passed references.
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template <typename... T>
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void PopObjects(Kernel::SharedPtr<T>&... pointers) {
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std::tie(pointers...) = PopObjects<T...>();
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}
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/**
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* @brief Pops the static buffer vaddr
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@ -344,15 +398,54 @@ inline Kernel::Handle RequestParser::PopHandle() {
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return Pop<Kernel::Handle>();
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}
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template <typename... H>
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void RequestParser::PopHandles(H&... handles) {
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const u32 handle_descriptor = Pop<u32>();
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const int handles_number = sizeof...(H);
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DEBUG_ASSERT_MSG(IsHandleDescriptor(handle_descriptor),
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"Tried to pop handle(s) but the descriptor is not a handle descriptor");
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DEBUG_ASSERT_MSG(handles_number == HandleNumberFromDesc(handle_descriptor),
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"Number of handles doesn't match the descriptor");
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Pop(static_cast<Kernel::Handle&>(handles)...);
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template <unsigned int N>
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std::array<Kernel::Handle, N> RequestParser::PopHandles() {
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u32 handle_descriptor = Pop<u32>();
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ASSERT_MSG(IsHandleDescriptor(handle_descriptor),
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"Tried to pop handle(s) but the descriptor is not a handle descriptor");
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ASSERT_MSG(N == HandleNumberFromDesc(handle_descriptor),
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"Number of handles doesn't match the descriptor");
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std::array<Kernel::Handle, N> handles{};
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for (Kernel::Handle& handle : handles) {
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handle = Pop<Kernel::Handle>();
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}
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return handles;
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}
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inline Kernel::SharedPtr<Kernel::Object> RequestParser::PopGenericObject() {
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Kernel::Handle handle = PopHandle();
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return context->GetIncomingHandle(handle);
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}
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template <typename T>
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Kernel::SharedPtr<T> RequestParser::PopObject() {
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return Kernel::DynamicObjectCast<T>(PopGenericObject());
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}
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template <unsigned int N>
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inline std::array<Kernel::SharedPtr<Kernel::Object>, N> RequestParser::PopGenericObjects() {
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std::array<Kernel::Handle, N> handles = PopHandles<N>();
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std::array<Kernel::SharedPtr<Kernel::Object>, N> pointers;
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for (int i = 0; i < N; ++i) {
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pointers[i] = context->GetIncomingHandle(handles[i]);
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}
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return pointers;
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}
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namespace detail {
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template <typename... T, size_t... I>
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std::tuple<Kernel::SharedPtr<T>...> PopObjectsHelper(
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std::array<Kernel::SharedPtr<Kernel::Object>, sizeof...(T)>&& pointers,
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std::index_sequence<I...>) {
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return std::make_tuple(Kernel::DynamicObjectCast<T>(std::move(pointers[I]))...);
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}
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} // namespace detail
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template <typename... T>
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inline std::tuple<Kernel::SharedPtr<T>...> RequestParser::PopObjects() {
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return detail::PopObjectsHelper<T...>(PopGenericObjects<sizeof...(T)>(),
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std::index_sequence_for<T...>{});
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}
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inline VAddr RequestParser::PopStaticBuffer(size_t* data_size, bool useStaticBuffersToGetVaddr) {
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