Kernel: Added support for shared memory objects.

SharedMemory: Added optional name field for tracking known objects.

src/core/CMakeLists.txt

@@ -38,6 +38,7 @@ set(SRCS    core.cpp
             hle/kernel/event.cpp
             hle/kernel/kernel.cpp
             hle/kernel/mutex.cpp
+            hle/kernel/shared_memory.cpp
             hle/kernel/thread.cpp
             hle/service/apt.cpp
             hle/service/fs.cpp
@@ -85,6 +86,7 @@ set(HEADERS core.h
             hle/kernel/archive.h
             hle/kernel/kernel.h
             hle/kernel/mutex.h
+            hle/kernel/shared_memory.h
             hle/kernel/thread.h
             hle/function_wrappers.h
             hle/service/apt.h

src/core/core.vcxproj

@@ -170,6 +170,7 @@
     <ClCompile Include="hle\kernel\event.cpp" />
     <ClCompile Include="hle\kernel\kernel.cpp" />
     <ClCompile Include="hle\kernel\mutex.cpp" />
+    <ClCompile Include="hle\kernel\shared_memory.cpp" />
     <ClCompile Include="hle\kernel\thread.cpp" />
     <ClCompile Include="hle\service\apt.cpp" />
     <ClCompile Include="hle\service\fs.cpp" />
@@ -222,6 +223,7 @@
     <ClInclude Include="hle\kernel\event.h" />
     <ClInclude Include="hle\kernel\kernel.h" />
     <ClInclude Include="hle\kernel\mutex.h" />
+    <ClInclude Include="hle\kernel\shared_memory.h" />
     <ClInclude Include="hle\kernel\thread.h" />
     <ClInclude Include="hle\service\apt.h" />
     <ClInclude Include="hle\service\fs.h" />

src/core/core.vcxproj.filters

@@ -179,6 +179,9 @@
     <ClCompile Include="file_sys\archive_romfs.cpp">
       <Filter>file_sys</Filter>
     </ClCompile>
+    <ClCompile Include="hle\kernel\shared_memory.cpp">
+      <Filter>hle\kernel</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="arm\disassembler\arm_disasm.h">
@@ -320,6 +323,9 @@
     <ClInclude Include="file_sys\archive_romfs.h">
       <Filter>file_sys</Filter>
     </ClInclude>
+    <ClInclude Include="hle\kernel\shared_memory.h">
+      <Filter>hle\kernel</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Text Include="CMakeLists.txt" />

src/core/hle/kernel/shared_memory.cpp

@@ -0,0 +1,94 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.  
+
+#include "common/common.h"
+
+#include "core/mem_map.h"
+#include "core/hle/kernel/shared_memory.h"
+
+namespace Kernel {
+
+class SharedMemory : public Object {
+public:
+    const char* GetTypeName() const { return "SharedMemory"; }
+
+    static Kernel::HandleType GetStaticHandleType() {  return Kernel::HandleType::SharedMemory; }
+    Kernel::HandleType GetHandleType() const { return Kernel::HandleType::SharedMemory; }
+
+    /**
+     * Wait for kernel object to synchronize
+     * @param wait Boolean wait set if current thread should wait as a result of sync operation
+     * @return Result of operation, 0 on success, otherwise error code
+     */
+    Result WaitSynchronization(bool* wait) {
+        // TODO(bunnei): ImplementMe
+        ERROR_LOG(OSHLE, "(UNIMPLEMENTED)");
+        return 0;
+    }
+
+    u32 base_address;       ///< Address of shared memory block in RAM
+    u32 permissions;        ///< Permissions of shared memory block (specified by SVC field)
+    u32 other_permissions;  ///< Other permissions of shared memory block (specified by SVC field)
+    std::string name;       ///< Name of shared memory object (optional)
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Creates a shared memory object
+ * @param handle Handle of newly created shared memory object
+ * @param name Name of shared memory object
+ * @return Pointer to newly created shared memory object
+ */
+SharedMemory* CreateSharedMemory(Handle& handle, const std::string& name) {
+    SharedMemory* shared_memory = new SharedMemory;
+    handle = Kernel::g_object_pool.Create(shared_memory);
+    shared_memory->name = name;
+    return shared_memory;
+}
+
+/**
+ * Creates a shared memory object
+ * @param name Optional name of shared memory object
+ * @return Handle of newly created shared memory object
+ */
+Handle CreateSharedMemory(const std::string& name) {
+    Handle handle;
+    CreateSharedMemory(handle, name);
+    return handle;
+}
+
+/**
+ * Maps a shared memory block to an address in system memory
+ * @param handle Shared memory block handle
+ * @param address Address in system memory to map shared memory block to
+ * @param permissions Memory block map permissions (specified by SVC field)
+ * @param other_permissions Memory block map other permissions (specified by SVC field)
+ * @return Result of operation, 0 on success, otherwise error code
+ */
+Result MapSharedMemory(u32 handle, u32 address, u32 permissions, u32 other_permissions) {
+    SharedMemory* shared_memory = Kernel::g_object_pool.GetFast<SharedMemory>(handle);
+    shared_memory->base_address = address;
+    shared_memory->permissions = permissions;
+    shared_memory->other_permissions = other_permissions;
+    return 0;
+}
+
+/**
+ * Gets a pointer to the shared memory block
+ * @param handle Shared memory block handle
+ * @param offset Offset from the start of the shared memory block to get pointer
+ * @return Pointer to the shared memory block from the specified offset
+ */
+u8* GetSharedMemoryPointer(Handle handle, u32 offset) {
+    SharedMemory* shared_memory = Kernel::g_object_pool.GetFast<SharedMemory>(handle);
+    _assert_msg_(KERNEL, (shared_memory != nullptr), "handle 0x%08X is not valid!", handle);
+    if (0 != shared_memory->base_address)
+        return Memory::GetPointer(shared_memory->base_address + offset);
+
+    ERROR_LOG(KERNEL, "memory block handle=0x%08X not mapped!", handle);
+    return nullptr;
+}
+
+} // namespace

src/core/hle/kernel/shared_memory.h

@@ -0,0 +1,38 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.  
+
+#pragma once
+
+#include "common/common_types.h"
+
+#include "core/hle/kernel/kernel.h"
+
+namespace Kernel {
+
+/**
+ * Creates a shared memory object
+ * @param name Optional name of shared memory object
+ * @return Handle of newly created shared memory object
+ */
+Handle CreateSharedMemory(const std::string& name="Unknown");
+
+/**
+ * Maps a shared memory block to an address in system memory
+ * @param handle Shared memory block handle
+ * @param address Address in system memory to map shared memory block to
+ * @param permissions Memory block map permissions (specified by SVC field)
+ * @param other_permissions Memory block map other permissions (specified by SVC field)
+ * @return Result of operation, 0 on success, otherwise error code
+ */
+Result MapSharedMemory(u32 handle, u32 address, u32 permissions, u32 other_permissions);
+
+/**
+ * Gets a pointer to the shared memory block
+ * @param handle Shared memory block handle
+ * @param offset Offset from the start of the shared memory block to get pointer
+ * @return Pointer to the shared memory block from the specified offset
+ */
+u8* GetSharedMemoryPointer(Handle handle, u32 offset);
+
+} // namespace