Tables: Add AcpiCompareParentTable() to check if an object is owned b…

…y a specified table This patch adds an API to be used to check if an object is owned by a specified table. Lv Zheng. Known issues: 1. Recursive lock In order to use this function in ACPI_TABLE_HANDLER, ACPI_TABLE_HANDLER need to be improved to avoid the recursive locking of MTX_TABLES. Signed-off-by: Lv Zheng <lv.zheng@intel.com>
acpica · Apr 6, 2016 · 505d9ff · 505d9ff
1 parent 7e9fe97
commit 505d9ff
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diff --git a/source/components/tables/tbxface.c b/source/components/tables/tbxface.c
@@ -614,3 +614,52 @@ AcpiRemoveTableHandler (
 }
 
 ACPI_EXPORT_SYMBOL (AcpiRemoveTableHandler)
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiCompareParentTable
+ *
+ * PARAMETERS:  TableIndex      - Table index
+ *              Object          - Namespace object to check if it is owned by
+ *                                the specified table.
+ *
+ * RETURN:      TRUE if the object was owned by the table, FALSE otherwise.
+ *
+ * DESCRIPTION: Check if a namespace object is owned by the table.
+ *
+ ******************************************************************************/
+
+BOOLEAN
+AcpiCompareParentTable (
+    UINT32                  TableIndex,
+    ACPI_HANDLE             Object)
+{
+    ACPI_NAMESPACE_NODE     *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Object);
+    BOOLEAN                 IsParent = FALSE;
+    ACPI_OWNER_ID           OwnerId;
+
+
+    ACPI_FUNCTION_TRACE (AcpiCompareParentTable);
+
+    if (!Node->OwnerId)
+    {
+        goto ErrorExit;
+    }
+
+    (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
+    if (TableIndex < AcpiGbl_RootTableList.CurrentTableCount)
+    {
+        OwnerId = AcpiGbl_RootTableList.Tables[TableIndex].OwnerId;
+        if (OwnerId == Node->OwnerId)
+        {
+            IsParent = TRUE;
+        }
+    }
+    (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
+
+ErrorExit:
+    return_UINT8 (IsParent);
+}
+
+ACPI_EXPORT_SYMBOL (AcpiCompareParentTable)
diff --git a/source/include/acpixf.h b/source/include/acpixf.h
@@ -168,6 +168,16 @@
     Prototype;
 #endif
 
+#ifndef ACPI_EXTERNAL_RETURN_TRUE
+#define ACPI_EXTERNAL_RETURN_TRUE(Prototype) \
+    Prototype;
+#endif
+
+#ifndef ACPI_EXTERNAL_RETURN_FALSE
+#define ACPI_EXTERNAL_RETURN_FALSE(Prototype) \
+    Prototype;
+#endif
+
 #ifndef ACPI_EXTERNAL_RETURN_OK
 #define ACPI_EXTERNAL_RETURN_OK(Prototype) \
     Prototype;
@@ -624,6 +634,12 @@ ACPI_STATUS ACPI_INIT_FUNCTION
 AcpiLoadTables (
     void))
 
+ACPI_EXTERNAL_RETURN_FALSE (
+BOOLEAN
+AcpiCompareParentTable (
+    UINT32                  TableIndex,
+    ACPI_HANDLE             Object))
+
 
 /*
  * ACPI table manipulation interfaces