hle: kernel: svc: Migrate WaitSynchronization.

src/core/hle/kernel/handle_table.h

@@ -10,6 +10,7 @@
 
 #include "common/common_types.h"
 #include "core/hle/kernel/k_auto_object.h"
+#include "core/hle/kernel/k_spin_lock.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/object.h"
 #include "core/hle/result.h"
@@ -110,6 +111,16 @@ public:
         return DynamicObjectCast<T>(GetGeneric(handle));
     }
 
+    template <typename T = KAutoObject>
+    KAutoObject* GetObjectImpl(Handle handle) const {
+        if (!IsValid(handle)) {
+            return nullptr;
+        }
+
+        auto* obj = objects_new[static_cast<u16>(handle >> 15)];
+        return obj->DynamicCast<T*>();
+    }
+
     template <typename T = KAutoObject>
     KScopedAutoObject<T> GetObject(Handle handle) const {
         if (handle == CurrentThread) {
@@ -148,6 +159,48 @@ public:
 
     ResultCode Add(Handle* out_handle, KAutoObject* obj, u16 type);
 
+    template <typename T>
+    bool GetMultipleObjects(T** out, const Handle* handles, size_t num_handles) const {
+        // Try to convert and open all the handles.
+        size_t num_opened;
+        {
+            // Lock the table.
+            KScopedSpinLock lk(lock);
+            for (num_opened = 0; num_opened < num_handles; num_opened++) {
+                // Get the current handle.
+                const auto cur_handle = handles[num_opened];
+
+                // Get the object for the current handle.
+                KAutoObject* cur_object = this->GetObjectImpl(cur_handle);
+                if (cur_object == nullptr) {
+                    break;
+                }
+
+                // Cast the current object to the desired type.
+                T* cur_t = cur_object->DynamicCast<T*>();
+                if (cur_t == nullptr) {
+                    break;
+                }
+
+                // Open a reference to the current object.
+                cur_t->Open();
+                out[num_opened] = cur_t;
+            }
+        }
+
+        // If we converted every object, succeed.
+        if (num_opened == num_handles) {
+            return true;
+        }
+
+        // If we didn't convert entry object, close the ones we opened.
+        for (size_t i = 0; i < num_opened; i++) {
+            out[i]->Close();
+        }
+
+        return false;
+    }
+
 private:
     /// Stores the Object referenced by the handle or null if the slot is empty.
     std::array<std::shared_ptr<Object>, MAX_COUNT> objects;
@@ -175,6 +228,8 @@ private:
     /// Head of the free slots linked list.
     u16 next_free_slot = 0;
 
+    mutable KSpinLock lock;
+
     /// Underlying kernel instance that this handle table operates under.
     KernelCore& kernel;
 };

src/core/hle/kernel/svc.cpp

@@ -430,65 +430,41 @@ static ResultCode GetProcessId32(Core::System& system, u32* out_process_id_low,
 
 /// Wait for the given handles to synchronize, timeout after the specified nanoseconds
 static ResultCode WaitSynchronization(Core::System& system, s32* index, VAddr handles_address,
-                                      u64 handle_count, s64 nano_seconds) {
-    LOG_TRACE(Kernel_SVC, "called handles_address=0x{:X}, handle_count={}, nano_seconds={}",
-              handles_address, handle_count, nano_seconds);
+                                      u64 num_handles, s64 nano_seconds) {
+    LOG_TRACE(Kernel_SVC, "called handles_address=0x{:X}, num_handles={}, nano_seconds={}",
+              handles_address, num_handles, nano_seconds);
 
-    auto& memory = system.Memory();
-    if (!memory.IsValidVirtualAddress(handles_address)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Handle address is not a valid virtual address, handle_address=0x{:016X}",
-                  handles_address);
-        return ResultInvalidPointer;
-    }
-
-    static constexpr u64 MaxHandles = 0x40;
-
-    if (handle_count > MaxHandles) {
-        LOG_ERROR(Kernel_SVC, "Handle count specified is too large, expected {} but got {}",
-                  MaxHandles, handle_count);
-        return ResultOutOfRange;
-    }
+    // Ensure number of handles is valid.
+    R_UNLESS(0 <= num_handles && num_handles <= ArgumentHandleCountMax, ResultOutOfRange);
 
     auto& kernel = system.Kernel();
-    std::vector<KSynchronizationObject*> objects(handle_count);
+    std::vector<KSynchronizationObject*> objs(num_handles);
     const auto& handle_table = kernel.CurrentProcess()->GetHandleTable();
+    Handle* handles = system.Memory().GetPointer<Handle>(handles_address);
 
-    for (u64 i = 0; i < handle_count; ++i) {
-        const Handle handle = memory.Read32(handles_address + i * sizeof(Handle));
-
-        bool succeeded{};
-        {
-            auto object = handle_table.Get<KSynchronizationObject>(handle);
-            if (object) {
-                objects[i] = object;
-                succeeded = true;
-            }
+    // Copy user handles.
+    if (num_handles > 0) {
+        // Convert the handles to objects.
+        R_UNLESS(handle_table.GetMultipleObjects<KSynchronizationObject>(objs.data(), handles,
+                                                                         num_handles),
+                 ResultInvalidHandle);
     }
 
-        // TODO(bunnei): WORKAROUND WHILE WE HAVE TWO HANDLE TABLES
-        if (!succeeded) {
-            {
-                auto object = handle_table.GetObject<KSynchronizationObject>(handle);
-
-                if (object.IsNull()) {
-                    LOG_ERROR(Kernel_SVC, "Object is a nullptr");
-                    return ResultInvalidHandle;
+    // Ensure handles are closed when we're done.
+    SCOPE_EXIT({
+        for (u64 i = 0; i < num_handles; ++i) {
+            objs[i]->Close();
         }
+    });
 
-                objects[i] = object.GetPointerUnsafe();
-                succeeded = true;
-            }
-        }
-    }
-    return KSynchronizationObject::Wait(kernel, index, objects.data(),
-                                        static_cast<s32>(objects.size()), nano_seconds);
+    return KSynchronizationObject::Wait(kernel, index, objs.data(), static_cast<s32>(objs.size()),
+                                        nano_seconds);
 }
 
 static ResultCode WaitSynchronization32(Core::System& system, u32 timeout_low, u32 handles_address,
-                                        s32 handle_count, u32 timeout_high, s32* index) {
+                                        s32 num_handles, u32 timeout_high, s32* index) {
     const s64 nano_seconds{(static_cast<s64>(timeout_high) << 32) | static_cast<s64>(timeout_low)};
-    return WaitSynchronization(system, index, handles_address, handle_count, nano_seconds);
+    return WaitSynchronization(system, index, handles_address, num_handles, nano_seconds);
 }
 
 /// Resumes a thread waiting on WaitSynchronization