Implement core Object Manager subsystem

xtoskrnl/ob/obmgr.cc

@@ -0,0 +1,120 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/ob/obmgr.cc
+ * DESCRIPTION:     Object Manager
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#include <xtos.hh>
+
+
+/**
+ * Initializes the Object Manager subsystem.
+ *
+ * @return This routine returns a status code indicating the success or failure of the operation.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+XTSTATUS
+OB::Manager::InitializeObjectManager(VOID)
+{
+    XTSTATUS Status;
+
+    /* Zero out the static global lookaside structures */
+    RTL::Memory::ZeroMemory(&CreateInfoList, sizeof(GENERAL_LOOKASIDE));
+    RTL::Memory::ZeroMemory(&NameBufferList, sizeof(GENERAL_LOOKASIDE));
+
+    /* Initialize the system-wide global lookaside list for object create information structures */
+    EX::LookasideList::InitializeLookasideList(&CreateInfoList, NonPagedPool,
+                                               sizeof(OBJECT_CREATE_INFORMATION), TAG_OB_CREATE_INFO,
+                                               64, EX::LookasideList::GetSystemLookasideListHead());
+
+    /* Initialize the system-wide global lookaside list for object name buffers */
+    EX::LookasideList::InitializeLookasideList(&NameBufferList, PagedPool,
+                                               OBJECT_NAME_BUFFER_SIZE, TAG_OB_NAME,
+                                               32, EX::LookasideList::GetSystemLookasideListHead());
+
+    /* Initialize system lookaside list for BSP */
+    InitializeSystemLookasideList();
+
+    /* Initialize device map support */
+    OB::DeviceMap::InitializeDeviceMap();
+
+    OB::LifeCycle::InitializeObjectLifeCycle();
+
+    /* Initialize object type registry */
+    Status = OB::TypeRegistry::InitializeObjectTypeRegistry();
+    if(Status != STATUS_SUCCESS)
+    {
+        /* Initialization failed, return error code */
+        return Status;
+    }
+
+    /* Return success */
+    return STATUS_SUCCESS;
+}
+
+/**
+ * Initializes the per-processor lookaside lists for the Object Manager.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+OB::Manager::InitializeSystemLookasideList(VOID)
+{
+    PKPROCESSOR_CONTROL_BLOCK Prcb;
+    PGENERAL_LOOKASIDE LookasideList;
+    XTSTATUS Status;
+
+    /* Retrieve the Processor Control Block */
+    Prcb = KE::Processor::GetCurrentProcessorControlBlock();
+
+    /* Allocate a contiguous memory block for lookaside lists */
+    Status = MM::Allocator::AllocatePool(NonPagedPool, sizeof(GENERAL_LOOKASIDE) * 2,
+                                         (PVOID*)&LookasideList, TAG_OB_CREATE_INFO);
+
+    /* Wire the global pointer for create information structures */
+    Prcb->LookasideList[LookasideCreateInfoList].Global = &CreateInfoList;
+
+    /* Check if the contiguous allocation was successful */
+    if(Status == STATUS_SUCCESS && LookasideList)
+    {
+        /* Map the pointer to the first half of the contiguous block */
+        Prcb->LookasideList[LookasideCreateInfoList].Local = &LookasideList[0];
+
+        /* Initialize the local list */
+        EX::LookasideList::InitializeLookasideList(&LookasideList[0], NonPagedPool,
+                                                   sizeof(OBJECT_CREATE_INFORMATION), TAG_OB_CREATE_INFO,
+                                                   64, EX::LookasideList::GetSystemLookasideListHead());
+    }
+    else
+    {
+        /* Allocation failed, use shared global list */
+        Prcb->LookasideList[LookasideCreateInfoList].Local = &CreateInfoList;
+    }
+
+    /* Wire the global pointer for object name buffers */
+    Prcb->LookasideList[LookasideNameBufferList].Global = &NameBufferList;
+
+    /* Check if the contiguous allocation was successful */
+    if(Status == STATUS_SUCCESS && LookasideList)
+    {
+        /* Map the pointer to the second half of the contiguous block */
+        Prcb->LookasideList[LookasideNameBufferList].Local = &LookasideList[1];
+
+        /* Initialize the local list */
+        EX::LookasideList::InitializeLookasideList(&LookasideList[1], PagedPool,
+                                                   OBJECT_NAME_BUFFER_SIZE, TAG_OB_NAME,
+                                                   32, EX::LookasideList::GetSystemLookasideListHead());
+    }
+    else
+    {
+        /* Allocation failed, use shared global list */
+        Prcb->LookasideList[LookasideNameBufferList].Local = &NameBufferList;
+    }
+}