gpio: implement more of server library for boot sysmodule client usage

libraries/libstratosphere/include/stratosphere/gpio/driver/impl/gpio_event_holder.hpp

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <vapours.hpp>
+#include <stratosphere/os.hpp>
+
+namespace ams::gpio::driver::impl {
+
+    class EventHolder {
+        NON_COPYABLE(EventHolder);
+        NON_MOVEABLE(EventHolder);
+        private:
+            os::SystemEventType *event;
+        public:
+            constexpr EventHolder() : event(nullptr) { /* ... */ }
+
+            void AttachEvent(os::SystemEventType *event) {
+                this->event = event;
+            }
+
+            os::SystemEventType *DetachEvent() {
+                auto ev = this->event;
+                this->event = nullptr;
+                return ev;
+            }
+
+            os::SystemEventType *GetSystemEvent() {
+                return this->event;
+            }
+
+            bool IsBound() const {
+                return this->event != nullptr;
+            }
+    };
+
+}

libraries/libstratosphere/include/stratosphere/gpio/driver/impl/gpio_pad_session_impl.hpp

@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <vapours.hpp>
+#include <stratosphere/gpio/gpio_types.hpp>
+#include <stratosphere/gpio/driver/gpio_pad_accessor.hpp>
+#include <stratosphere/gpio/driver/impl/gpio_event_holder.hpp>
+#include <stratosphere/ddsf.hpp>
+
+namespace ams::gpio::driver {
+
+    class Pad;
+
+}
+
+namespace ams::gpio::driver::impl {
+
+    class PadSessionImpl : public ::ams::ddsf::ISession {
+        NON_COPYABLE(PadSessionImpl);
+        NON_MOVEABLE(PadSessionImpl);
+        AMS_DDSF_CASTABLE_TRAITS(ams::gpio::driver::impl::PadSessionImpl, ::ams::ddsf::ISession);
+        private:
+            EventHolder event_holder;
+        private:
+            Result UpdateDriverInterruptEnabled();
+        public:
+            PadSessionImpl() : event_holder() { /* ... */ }
+
+            ~PadSessionImpl() {
+                this->Close();
+            }
+
+            bool IsInterruptBound() const {
+                return this->event_holder.IsBound();
+            }
+
+            Result Open(Pad *pad, ddsf::AccessMode access_mode);
+            void Close();
+
+            Result BindInterrupt(os::SystemEventType *event);
+            void UnbindInterrupt();
+
+            Result GetInterruptEnabled(bool *out) const;
+            Result SetInterruptEnabled(bool en);
+            void SignalInterruptBoundEvent();
+    };
+    static_assert( sizeof(PadSessionImpl) <= GpioPadSessionSize);
+    static_assert(alignof(PadSessionImpl) <= GpioPadSessionAlign);
+
+    struct alignas(GpioPadSessionAlign) GpioPadSessionImplPadded {
+        PadSessionImpl _impl;
+        u8 _padding[GpioPadSessionSize - sizeof(PadSessionImpl)];
+    };
+    static_assert( sizeof(GpioPadSessionImplPadded) == GpioPadSessionSize);
+    static_assert(alignof(GpioPadSessionImplPadded) == GpioPadSessionAlign);
+
+    ALWAYS_INLINE PadSessionImpl &GetPadSessionImpl(GpioPadSession &session) {
+        return GetReference(session._impl)._impl;
+    }
+
+    ALWAYS_INLINE const PadSessionImpl &GetPadSessionImpl(const GpioPadSession &session) {
+        return GetReference(session._impl)._impl;
+    }
+
+    ALWAYS_INLINE PadSessionImpl &GetOpenPadSessionImpl(GpioPadSession &session) {
+        auto &ref = GetReference(session._impl)._impl;
+        AMS_ASSERT(ref.IsOpen());
+        return ref;
+    }
+
+    ALWAYS_INLINE const PadSessionImpl &GetOpenPadSessionImpl(const GpioPadSession &session) {
+        const auto &ref = GetReference(session._impl)._impl;
+        AMS_ASSERT(ref.IsOpen());
+        return ref;
+    }
+
+}