EFI Driver Model related protocols, manage Unicode string tables for UEFI Drivers, \r
and print messages on the console output and standard error devices.\r
\r
- Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
+ Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution. The full text of the license may be found at\r
return Status;\r
}\r
\r
+/**\r
+ Signals an event group by placing a new event in the group temporarily and\r
+ signaling it.\r
+\r
+ @param[in] EventGroup Supplies the unique identifier of the event\r
+ group to signal.\r
+\r
+ @retval EFI_SUCCESS The event group was signaled successfully.\r
+ @retval EFI_INVALID_PARAMETER EventGroup is NULL.\r
+ @return Error codes that report problems about event\r
+ creation or signaling.\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+EfiEventGroupSignal (\r
+ IN CONST EFI_GUID *EventGroup\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ EFI_EVENT Event;\r
+\r
+ if (EventGroup == NULL) {\r
+ return EFI_INVALID_PARAMETER;\r
+ }\r
+\r
+ Status = gBS->CreateEventEx (\r
+ EVT_NOTIFY_SIGNAL,\r
+ TPL_CALLBACK,\r
+ EfiEventEmptyFunction,\r
+ NULL,\r
+ EventGroup,\r
+ &Event\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ Status = gBS->SignalEvent (Event);\r
+ gBS->CloseEvent (Event);\r
+\r
+ return Status;\r
+}\r
+\r
+/**\r
+ An empty function that can be used as NotifyFunction parameter of\r
+ CreateEvent() or CreateEventEx().\r
+\r
+ @param Event Event whose notification function is being invoked.\r
+ @param Context The pointer to the notification function's context,\r
+ which is implementation-dependent.\r
+\r
+**/\r
+VOID\r
+EFIAPI\r
+EfiEventEmptyFunction (\r
+ IN EFI_EVENT Event,\r
+ IN VOID *Context\r
+ )\r
+{\r
+}\r
+\r
/** \r
Returns the current TPL.\r
\r
return EFI_SUCCESS;\r
}\r
\r
+#ifndef DISABLE_NEW_DEPRECATED_INTERFACES\r
+\r
/**\r
+ [ATTENTION] This function will be deprecated for security reason.\r
+\r
Returns a pointer to an allocated buffer that contains the contents of a \r
variable retrieved through the UEFI Runtime Service GetVariable(). The \r
returned buffer is allocated using AllocatePool(). The caller is responsible\r
return Value;\r
}\r
\r
-\r
/**\r
+ [ATTENTION] This function will be deprecated for security reason.\r
+\r
Returns a pointer to an allocated buffer that contains the contents of a \r
variable retrieved through the UEFI Runtime Service GetVariable(). This \r
function always uses the EFI_GLOBAL_VARIABLE GUID to retrieve variables.\r
{\r
return GetVariable (Name, &gEfiGlobalVariableGuid);\r
}\r
+#endif\r
\r
+/**\r
+ Returns the status whether get the variable success. The function retrieves \r
+ variable through the UEFI Runtime Service GetVariable(). The \r
+ returned buffer is allocated using AllocatePool(). The caller is responsible\r
+ for freeing this buffer with FreePool().\r
+\r
+ If Name is NULL, then ASSERT().\r
+ If Guid is NULL, then ASSERT().\r
+ If Value is NULL, then ASSERT().\r
+\r
+ @param[in] Name The pointer to a Null-terminated Unicode string.\r
+ @param[in] Guid The pointer to an EFI_GUID structure\r
+ @param[out] Value The buffer point saved the variable info.\r
+ @param[out] Size The buffer size of the variable.\r
+\r
+ @return EFI_OUT_OF_RESOURCES Allocate buffer failed.\r
+ @return EFI_SUCCESS Find the specified variable.\r
+ @return Others Errors Return errors from call to gRT->GetVariable.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+GetVariable2 (\r
+ IN CONST CHAR16 *Name,\r
+ IN CONST EFI_GUID *Guid,\r
+ OUT VOID **Value,\r
+ OUT UINTN *Size OPTIONAL\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ UINTN BufferSize;\r
+\r
+ ASSERT (Name != NULL && Guid != NULL && Value != NULL);\r
+\r
+ //\r
+ // Try to get the variable size.\r
+ //\r
+ BufferSize = 0;\r
+ *Value = NULL;\r
+ if (Size != NULL) {\r
+ *Size = 0;\r
+ }\r
+ \r
+ Status = gRT->GetVariable ((CHAR16 *) Name, (EFI_GUID *) Guid, NULL, &BufferSize, *Value);\r
+ if (Status != EFI_BUFFER_TOO_SMALL) {\r
+ return Status;\r
+ }\r
+\r
+ //\r
+ // Allocate buffer to get the variable.\r
+ //\r
+ *Value = AllocatePool (BufferSize);\r
+ ASSERT (*Value != NULL);\r
+ if (*Value == NULL) {\r
+ return EFI_OUT_OF_RESOURCES;\r
+ }\r
+\r
+ //\r
+ // Get the variable data.\r
+ //\r
+ Status = gRT->GetVariable ((CHAR16 *) Name, (EFI_GUID *) Guid, NULL, &BufferSize, *Value);\r
+ if (EFI_ERROR (Status)) {\r
+ FreePool(*Value);\r
+ *Value = NULL;\r
+ }\r
+\r
+ if (Size != NULL) {\r
+ *Size = BufferSize;\r
+ }\r
+\r
+ return Status;\r
+}\r
+\r
+/**\r
+ Returns a pointer to an allocated buffer that contains the contents of a \r
+ variable retrieved through the UEFI Runtime Service GetVariable(). This \r
+ function always uses the EFI_GLOBAL_VARIABLE GUID to retrieve variables.\r
+ The returned buffer is allocated using AllocatePool(). The caller is \r
+ responsible for freeing this buffer with FreePool().\r
+\r
+ If Name is NULL, then ASSERT().\r
+ If Value is NULL, then ASSERT().\r
+\r
+ @param[in] Name The pointer to a Null-terminated Unicode string.\r
+ @param[out] Value The buffer point saved the variable info.\r
+ @param[out] Size The buffer size of the variable.\r
+\r
+ @return EFI_OUT_OF_RESOURCES Allocate buffer failed.\r
+ @return EFI_SUCCESS Find the specified variable.\r
+ @return Others Errors Return errors from call to gRT->GetVariable.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+GetEfiGlobalVariable2 (\r
+ IN CONST CHAR16 *Name,\r
+ OUT VOID **Value,\r
+ OUT UINTN *Size OPTIONAL\r
+ )\r
+{\r
+ return GetVariable2 (Name, &gEfiGlobalVariableGuid, Value, Size);\r
+}\r
\r
/**\r
Returns a pointer to an allocated buffer that contains the best matching language \r
//\r
return NULL;\r
}\r
-\r
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