sp_MSlocktable (Transact-SQL MetaData) Definition

Please note: that the following source code is provided and copyrighted by Microsoft and is for educational purpose only.
The meta data is from an SQL 2012 Server.

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Definition:

sys.sp_MSlocktable(nvarchar @ownername
, nvarchar @tablename)

MetaData:

 create procedure sys.sp_MSlocktable  
(  
@ownername        sysname,  
@tablename        sysname  
)  
AS  
begin  
    declare @retcode            int  
            ,@procname            sysname  
            ,@objid                 int  
            ,@qualified_name        nvarchar(300)  
            ,@spretcode int  
            ,@spcall nvarchar(256)  
      
    if @ownername is null  
        set @qualified_name= QUOTENAME(@tablename)  
    else  
        set @qualified_name= QUOTENAME(@ownername) + '.' + QUOTENAME(@tablename)  
  
    select @objid = object_id(@qualified_name)  
    if @objid is NULL  
        select @objid = object_id from sys.objects where name=@tablename  
    if @objid is null  
        return (1)  
      
    exec @retcode = sys.sp_MSrepl_PAL_rolecheck @objid = @objid   
    if ((@retcode <> 0) or (@@error <> 0))  
        return 1  
  
    if 1=sys.fn_MSuselightweightreplication(null, null, null, null, null, null, @objid)  
    begin  
        --   
        --  For security: break ownership chain as  
        --  we have no control over the proc name is  
        --   
        select @procname= 'dbo.MSmerge_lws_sp_multi_' + procname_postfix from dbo.sysmergearticles where objid = @objid  
                            and (1 = {fn ISPALUSER(pubid)})  
        select @spcall = N'exec @p1 = ' + @procname + N' @action = 4 '  
        exec @retcode = sys.sp_executesql @stmt = @spcall  
            ,@params = N'@p1 int output'  
            ,@p1 = @spretcode output  
        IF @@ERROR<>0 or @retcode<>0 or @spretcode != 0   
            RETURN (1)  
    end              
    else  
    begin  
        --   
        --  For security: break ownership chain as  
        --  we have no control over the proc name is  
        --   
        select @procname = 'dbo.' + select_proc from dbo.sysmergearticles where objid = @objid  
                        and (1 = {fn ISPALUSER(pubid)})  
        select @spcall = N'exec @p1 = ' + @procname + N' @maxschemaguidforarticle = NULL, @type = 7 '  
        exec @retcode = sys.sp_executesql @stmt = @spcall  
            ,@params = N'@p1 int output'  
            ,@p1 = @spretcode output  
        IF @@ERROR<>0 or @retcode<>0 or @spretcode != 0   
            RETURN (1)  
    end  
end