ACPICA 20050708 from Bob Moore <robert.moore@intel.com>

[safe/jmp/linux-2.6] / drivers / acpi / utilities / utmisc.c

diff --git a/drivers/acpi/utilities/utmisc.c b/drivers/acpi/utilities/utmisc.c
index 207c836..df715cd 100644 (file)
--- a/drivers/acpi/utilities/utmisc.c
+++ b/drivers/acpi/utilities/utmisc.c
@@ -52,6 +52,100 @@
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_ut_allocate_owner_id
+ *
+ * PARAMETERS:  owner_id        - Where the new owner ID is returned
+ *
+ * DESCRIPTION: Allocate a table or method owner id
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_allocate_owner_id (
+       acpi_owner_id                   *owner_id)
+{
+       acpi_native_uint                i;
+       acpi_status                     status;
+
+
+       ACPI_FUNCTION_TRACE ("ut_allocate_owner_id");
+
+
+       status = acpi_ut_acquire_mutex (ACPI_MTX_CACHES);
+       if (ACPI_FAILURE (status)) {
+               return_ACPI_STATUS (status);
+       }
+
+       /* Find a free owner ID */
+
+       for (i = 0; i < 32; i++) {
+               if (!(acpi_gbl_owner_id_mask & (1 << i))) {
+                       acpi_gbl_owner_id_mask |= (1 << i);
+                       *owner_id = (acpi_owner_id) i;
+                       goto exit;
+               }
+       }
+
+       /*
+        * If we are here, all owner_ids have been allocated. This probably should
+        * not happen since the IDs are reused after deallocation. The IDs are
+        * allocated upon table load (one per table) and method execution, and
+        * they are released when a table is unloaded or a method completes
+        * execution.
+        */
+       status = AE_OWNER_ID_LIMIT;
+       ACPI_REPORT_ERROR ((
+               "Could not allocate new owner_id (32 max), AE_OWNER_ID_LIMIT\n"));
+
+exit:
+       (void) acpi_ut_release_mutex (ACPI_MTX_CACHES);
+       return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_release_owner_id
+ *
+ * PARAMETERS:  owner_id        - A previously allocated owner ID
+ *
+ * DESCRIPTION: Release a table or method owner id
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_release_owner_id (
+       acpi_owner_id                   owner_id)
+{
+       acpi_status                     status;
+
+
+       ACPI_FUNCTION_TRACE ("ut_release_owner_id");
+
+
+       status = acpi_ut_acquire_mutex (ACPI_MTX_CACHES);
+       if (ACPI_FAILURE (status)) {
+               return_ACPI_STATUS (status);
+       }
+
+       /* Free the owner ID */
+
+       if (acpi_gbl_owner_id_mask & (1 << owner_id)) {
+               acpi_gbl_owner_id_mask ^= (1 << owner_id);
+       }
+       else {
+               /* This owner_id has not been allocated */
+
+               status = AE_NOT_EXIST;
+       }
+
+       (void) acpi_ut_release_mutex (ACPI_MTX_CACHES);
+       return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_ut_strupr (strupr)
  *
  * PARAMETERS:  src_string      - The source string to convert