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IntelFrameworkPkg/FrameworkUefiLib: Sync with MdePkg/UefiLib 

Add functions that have been added to MdePkg/UefiLib.

* GetVariable2()
* GetEfiGlobalVariable2

Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Bret Barkelew <Bret.Barkelew@microsoft.com>
This commit is contained in:
Kinney, Michael D 2018-02-02 09:59:18 -08:00 committed by Michael D Kinney
parent 3499b150d1
commit 7aaa7e67c4
1 changed files with 102 additions and 0 deletions
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102
IntelFrameworkPkg/Library/FrameworkUefiLib/UefiLib.c
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@ -1338,6 +1338,108 @@ GetEfiGlobalVariable (
return GetVariable (Name, &gEfiGlobalVariableGuid);
}
/**
Returns the status whether get the variable success. The function retrieves
variable through the UEFI Runtime Service GetVariable(). The
returned buffer is allocated using AllocatePool(). The caller is responsible
for freeing this buffer with FreePool().
If Name is NULL, then ASSERT().
If Guid is NULL, then ASSERT().
If Value is NULL, then ASSERT().
@param[in] Name The pointer to a Null-terminated Unicode string.
@param[in] Guid The pointer to an EFI_GUID structure
@param[out] Value The buffer point saved the variable info.
@param[out] Size The buffer size of the variable.
@return EFI_OUT_OF_RESOURCES Allocate buffer failed.
@return EFI_SUCCESS Find the specified variable.
@return Others Errors Return errors from call to gRT->GetVariable.
**/
EFI_STATUS
EFIAPI
GetVariable2 (
IN CONST CHAR16 *Name,
IN CONST EFI_GUID *Guid,
OUT VOID **Value,
OUT UINTN *Size OPTIONAL
)
{
EFI_STATUS Status;
UINTN BufferSize;
ASSERT (Name != NULL && Guid != NULL && Value != NULL);
//
// Try to get the variable size.
//
BufferSize = 0;
*Value = NULL;
if (Size != NULL) {
*Size = 0;
}
Status = gRT->GetVariable ((CHAR16 *) Name, (EFI_GUID *) Guid, NULL, &BufferSize, *Value);
if (Status != EFI_BUFFER_TOO_SMALL) {
return Status;
}
//
// Allocate buffer to get the variable.
//
*Value = AllocatePool (BufferSize);
ASSERT (*Value != NULL);
if (*Value == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Get the variable data.
//
Status = gRT->GetVariable ((CHAR16 *) Name, (EFI_GUID *) Guid, NULL, &BufferSize, *Value);
if (EFI_ERROR (Status)) {
FreePool(*Value);
*Value = NULL;
}
if (Size != NULL) {
*Size = BufferSize;
}
return Status;
}
/**
Returns a pointer to an allocated buffer that contains the contents of a
variable retrieved through the UEFI Runtime Service GetVariable(). This
function always uses the EFI_GLOBAL_VARIABLE GUID to retrieve variables.
The returned buffer is allocated using AllocatePool(). The caller is
responsible for freeing this buffer with FreePool().
If Name is NULL, then ASSERT().
If Value is NULL, then ASSERT().
@param[in] Name The pointer to a Null-terminated Unicode string.
@param[out] Value The buffer point saved the variable info.
@param[out] Size The buffer size of the variable.
@return EFI_OUT_OF_RESOURCES Allocate buffer failed.
@return EFI_SUCCESS Find the specified variable.
@return Others Errors Return errors from call to gRT->GetVariable.
**/
EFI_STATUS
EFIAPI
GetEfiGlobalVariable2 (
IN CONST CHAR16 *Name,
OUT VOID **Value,
OUT UINTN *Size OPTIONAL
)
{
return GetVariable2 (Name, &gEfiGlobalVariableGuid, Value, Size);
}
/**
Returns a pointer to an allocated buffer that contains the best matching language