[mirror_edk2.git] / MdePkg / Library / BasePerformanceLibNull / PerformanceLib.c

/** @file\r
  Base Performance Library which provides no service.\r
\r
  Copyright (c) 2006 - 2012, 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
  http://opensource.org/licenses/bsd-license.php.\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
\r
#include <Base.h>\r
\r
\r
#include <Library/PerformanceLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/PcdLib.h>\r
\r
/**\r
  Creates a record for the beginning of a performance measurement. \r
  \r
  Creates a record that contains the Handle, Token, and Module.\r
  If TimeStamp is not zero, then TimeStamp is added to the record as the start time.\r
  If TimeStamp is zero, then this function reads the current time stamp\r
  and adds that time stamp value to the record as the start time.\r
\r
  @param  Handle                  The pointer to environment specific context used\r
                                  to identify the component being measured.\r
  @param  Token                   The pointer to a Null-terminated ASCII string\r
                                  that identifies the component being measured.\r
  @param  Module                  The pointer to a Null-terminated ASCII string\r
                                  that identifies the module being measured.\r
  @param  TimeStamp               64-bit time stamp.\r
\r
  @retval RETURN_SUCCESS          The start of the measurement was recorded.\r
  @retval RETURN_OUT_OF_RESOURCES There are not enough resources to record the measurement.\r
  @retval RETURN_DEVICE_ERROR     A device error reading the time stamp.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
StartPerformanceMeasurement (\r
  IN CONST VOID   *Handle,  OPTIONAL\r
  IN CONST CHAR8  *Token,   OPTIONAL\r
  IN CONST CHAR8  *Module,  OPTIONAL\r
  IN UINT64       TimeStamp\r
  )\r
{\r
  return RETURN_SUCCESS;\r
}\r
\r
/**\r
  Fills in the end time of a performance measurement. \r
  \r
  Looks up the record that matches Handle, Token, and Module.\r
  If the record can not be found then return RETURN_NOT_FOUND.\r
  If the record is found and TimeStamp is not zero,\r
  then TimeStamp is added to the record as the end time.\r
  If the record is found and TimeStamp is zero, then this function reads\r
  the current time stamp and adds that time stamp value to the record as the end time.\r
\r
  @param  Handle                  The pointer to environment specific context used\r
                                  to identify the component being measured.\r
  @param  Token                   The pointer to a Null-terminated ASCII string\r
                                  that identifies the component being measured.\r
  @param  Module                  The pointer to a Null-terminated ASCII string\r
                                  that identifies the module being measured.\r
  @param  TimeStamp               64-bit time stamp.\r
\r
  @retval RETURN_SUCCESS          The end of the measurement was recorded.\r
  @retval RETURN_NOT_FOUND        The specified measurement record could not be found.\r
  @retval RETURN_DEVICE_ERROR     A device error reading the time stamp.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
EndPerformanceMeasurement (\r
  IN CONST VOID   *Handle,  OPTIONAL\r
  IN CONST CHAR8  *Token,   OPTIONAL\r
  IN CONST CHAR8  *Module,  OPTIONAL\r
  IN UINT64       TimeStamp\r
  )\r
{\r
  return RETURN_SUCCESS;\r
}\r
\r
/**\r
  Attempts to retrieve a performance measurement log entry from the performance measurement log. \r
  It can also retrieve the log created by StartPerformanceMeasurementEx and EndPerformanceMeasurementEx,\r
  and then eliminate the Identifier.\r
\r
  Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is\r
  zero on entry, then an attempt is made to retrieve the first entry from the performance log,\r
  and the key for the second entry in the log is returned.  If the performance log is empty,\r
  then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance\r
  log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is\r
  returned.  If LogEntryKey is the key for the last entry in the log, then the last log entry is\r
  retrieved and an implementation specific non-zero key value that specifies the end of the performance\r
  log is returned.  If LogEntryKey is equal this implementation specific non-zero key value, then no entry\r
  is retrieved and zero is returned.  In the cases where a performance log entry can be returned,\r
  the log entry is returned in Handle, Token, Module, StartTimeStamp, and EndTimeStamp.\r
  If LogEntryKey is not a valid log entry key for the performance measurement log, then ASSERT().\r
  If Handle is NULL, then ASSERT().\r
  If Token is NULL, then ASSERT().\r
  If Module is NULL, then ASSERT().\r
  If StartTimeStamp is NULL, then ASSERT().\r
  If EndTimeStamp is NULL, then ASSERT().\r
\r
  @param  LogEntryKey             On entry, the key of the performance measurement log entry to retrieve.\r
                                  0, then the first performance measurement log entry is retrieved.\r
                                  On exit, the key of the next performance lof entry entry.\r
  @param  Handle                  The pointer to environment specific context used to identify the component\r
                                  being measured.  \r
  @param  Token                   The pointer to a Null-terminated ASCII string that identifies the component\r
                                  being measured. \r
  @param  Module                  The pointer to a Null-terminated ASCII string that identifies the module\r
                                  being measured.\r
  @param  StartTimeStamp          The pointer to the 64-bit time stamp that was recorded when the measurement\r
                                  was started.\r
  @param  EndTimeStamp            The pointer to the 64-bit time stamp that was recorded when the measurement\r
                                  was ended.\r
\r
  @return The key for the next performance log entry (in general case).\r
\r
**/\r
UINTN\r
EFIAPI\r
GetPerformanceMeasurement (\r
  IN  UINTN       LogEntryKey, \r
  OUT CONST VOID  **Handle,\r
  OUT CONST CHAR8 **Token,\r
  OUT CONST CHAR8 **Module,\r
  OUT UINT64      *StartTimeStamp,\r
  OUT UINT64      *EndTimeStamp\r
  )\r
{\r
  ASSERT (Handle != NULL);\r
  ASSERT (Token != NULL);\r
  ASSERT (Module != NULL);\r
  ASSERT (StartTimeStamp != NULL);\r
  ASSERT (EndTimeStamp != NULL);\r
\r
  return 0;\r
}\r
\r
/**\r
  Creates a record for the beginning of a performance measurement.\r
\r
  Creates a record that contains the Handle, Token, Module and Identifier.\r
  If TimeStamp is not zero, then TimeStamp is added to the record as the start time.\r
  If TimeStamp is zero, then this function reads the current time stamp\r
  and adds that time stamp value to the record as the start time.\r
\r
  @param  Handle                  Pointer to environment specific context used\r
                                  to identify the component being measured.\r
  @param  Token                   Pointer to a Null-terminated ASCII string\r
                                  that identifies the component being measured.\r
  @param  Module                  Pointer to a Null-terminated ASCII string\r
                                  that identifies the module being measured.\r
  @param  TimeStamp               64-bit time stamp.\r
  @param  Identifier              32-bit identifier. If the value is 0, the created record\r
                                  is same as the one created by StartPerformanceMeasurement.\r
\r
  @retval RETURN_SUCCESS          The start of the measurement was recorded.\r
  @retval RETURN_OUT_OF_RESOURCES There are not enough resources to record the measurement.\r
  @retval RETURN_DEVICE_ERROR     A device error reading the time stamp.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
StartPerformanceMeasurementEx (\r
  IN CONST VOID   *Handle,  OPTIONAL\r
  IN CONST CHAR8  *Token,   OPTIONAL\r
  IN CONST CHAR8  *Module,  OPTIONAL\r
  IN UINT64       TimeStamp,\r
  IN UINT32       Identifier\r
  )\r
{\r
  return RETURN_SUCCESS;\r
}\r
\r
/**\r
  Fills in the end time of a performance measurement.\r
\r
  Looks up the record that matches Handle, Token, Module and Identifier.\r
  If the record can not be found then return RETURN_NOT_FOUND.\r
  If the record is found and TimeStamp is not zero,\r
  then TimeStamp is added to the record as the end time.\r
  If the record is found and TimeStamp is zero, then this function reads\r
  the current time stamp and adds that time stamp value to the record as the end time.\r
\r
  @param  Handle                  Pointer to environment specific context used\r
                                  to identify the component being measured.\r
  @param  Token                   Pointer to a Null-terminated ASCII string\r
                                  that identifies the component being measured.\r
  @param  Module                  Pointer to a Null-terminated ASCII string\r
                                  that identifies the module being measured.\r
  @param  TimeStamp               64-bit time stamp.\r
  @param  Identifier              32-bit identifier. If the value is 0, the found record\r
                                  is same as the one found by EndPerformanceMeasurement.\r
\r
  @retval RETURN_SUCCESS          The end of  the measurement was recorded.\r
  @retval RETURN_NOT_FOUND        The specified measurement record could not be found.\r
  @retval RETURN_DEVICE_ERROR     A device error reading the time stamp.\r
\r
**/\r
RETURN_STATUS\r
EFIAPI\r
EndPerformanceMeasurementEx (\r
  IN CONST VOID   *Handle,  OPTIONAL\r
  IN CONST CHAR8  *Token,   OPTIONAL\r
  IN CONST CHAR8  *Module,  OPTIONAL\r
  IN UINT64       TimeStamp,\r
  IN UINT32       Identifier\r
  )\r
{\r
  return RETURN_SUCCESS;\r
}\r
\r
/**\r
  Attempts to retrieve a performance measurement log entry from the performance measurement log.\r
  It can also retrieve the log created by StartPerformanceMeasurement and EndPerformanceMeasurement,\r
  and then assign the Identifier with 0.\r
\r
  Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is\r
  zero on entry, then an attempt is made to retrieve the first entry from the performance log,\r
  and the key for the second entry in the log is returned.  If the performance log is empty,\r
  then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance\r
  log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is\r
  returned.  If LogEntryKey is the key for the last entry in the log, then the last log entry is\r
  retrieved and an implementation specific non-zero key value that specifies the end of the performance\r
  log is returned.  If LogEntryKey is equal this implementation specific non-zero key value, then no entry\r
  is retrieved and zero is returned.  In the cases where a performance log entry can be returned,\r
  the log entry is returned in Handle, Token, Module, StartTimeStamp, EndTimeStamp and Identifier.\r
  If LogEntryKey is not a valid log entry key for the performance measurement log, then ASSERT().\r
  If Handle is NULL, then ASSERT().\r
  If Token is NULL, then ASSERT().\r
  If Module is NULL, then ASSERT().\r
  If StartTimeStamp is NULL, then ASSERT().\r
  If EndTimeStamp is NULL, then ASSERT().\r
  If Identifier is NULL, then ASSERT().\r
\r
  @param  LogEntryKey             On entry, the key of the performance measurement log entry to retrieve.\r
                                  0, then the first performance measurement log entry is retrieved.\r
                                  On exit, the key of the next performance lof entry entry.\r
  @param  Handle                  Pointer to environment specific context used to identify the component\r
                                  being measured.\r
  @param  Token                   Pointer to a Null-terminated ASCII string that identifies the component\r
                                  being measured.\r
  @param  Module                  Pointer to a Null-terminated ASCII string that identifies the module\r
                                  being measured.\r
  @param  StartTimeStamp          Pointer to the 64-bit time stamp that was recorded when the measurement\r
                                  was started.\r
  @param  EndTimeStamp            Pointer to the 64-bit time stamp that was recorded when the measurement\r
                                  was ended.\r
  @param  Identifier              Pointer to the 32-bit identifier that was recorded.\r
\r
  @return The key for the next performance log entry (in general case).\r
\r
**/\r
UINTN\r
EFIAPI\r
GetPerformanceMeasurementEx (\r
  IN  UINTN       LogEntryKey, \r
  OUT CONST VOID  **Handle,\r
  OUT CONST CHAR8 **Token,\r
  OUT CONST CHAR8 **Module,\r
  OUT UINT64      *StartTimeStamp,\r
  OUT UINT64      *EndTimeStamp,\r
  OUT UINT32      *Identifier\r
  )\r
{\r
  ASSERT (Handle != NULL);\r
  ASSERT (Token != NULL);\r
  ASSERT (Module != NULL);\r
  ASSERT (StartTimeStamp != NULL);\r
  ASSERT (EndTimeStamp != NULL);\r
  ASSERT (Identifier != NULL);\r
\r
  return 0;\r
}\r
\r
/**\r
  Returns TRUE if the performance measurement macros are enabled. \r
  \r
  This function returns TRUE if the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of\r
  PcdPerformanceLibraryPropertyMask is set.  Otherwise FALSE is returned.\r
\r
  @retval TRUE                    The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of\r
                                  PcdPerformanceLibraryPropertyMask is set.\r
  @retval FALSE                   The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of\r
                                  PcdPerformanceLibraryPropertyMask is clear.\r
\r
**/\r
BOOLEAN\r
EFIAPI\r
PerformanceMeasurementEnabled (\r
  VOID\r
  )\r
{\r
  return (BOOLEAN) ((PcdGet8(PcdPerformanceLibraryPropertyMask) & PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED) != 0);\r
}\r
Commit	Line	Data
e1f414b6	1	/** @file\r
	2	Base Performance Library which provides no service.\r
	3	\r
05570a7e	4	Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>\r
19388d29	5	This program and the accompanying materials\r
e1f414b6	6	are licensed and made available under the terms and conditions of the BSD License\r
e1f414b6	7	which accompanies this distribution. The full text of the license may be found at\r
2fc59a00	8	http://opensource.org/licenses/bsd-license.php.\r
e1f414b6	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
e1f414b6	13	**/\r
e1f414b6	14	\r
c892d846	15	\r
c7d265a9	16	#include <Base.h>\r
c892d846	17	\r
c892d846	18	\r
c7d265a9	19	#include <Library/PerformanceLib.h>\r
	20	#include <Library/DebugLib.h>\r
	21	#include <Library/PcdLib.h>\r
e1f414b6	22	\r
	23	/**\r
	24	Creates a record for the beginning of a performance measurement. \r
	25	\r
	26	Creates a record that contains the Handle, Token, and Module.\r
	27	If TimeStamp is not zero, then TimeStamp is added to the record as the start time.\r
	28	If TimeStamp is zero, then this function reads the current time stamp\r
	29	and adds that time stamp value to the record as the start time.\r
	30	\r
2fc59a00	31	@param Handle The pointer to environment specific context used\r
e1f414b6	32	to identify the component being measured.\r
2fc59a00	33	@param Token The pointer to a Null-terminated ASCII string\r
e1f414b6	34	that identifies the component being measured.\r
2fc59a00	35	@param Module The pointer to a Null-terminated ASCII string\r
e1f414b6	36	that identifies the module being measured.\r
	37	@param TimeStamp 64-bit time stamp.\r
	38	\r
	39	@retval RETURN_SUCCESS The start of the measurement was recorded.\r
	40	@retval RETURN_OUT_OF_RESOURCES There are not enough resources to record the measurement.\r
8404146c	41	@retval RETURN_DEVICE_ERROR A device error reading the time stamp.\r
e1f414b6	42	\r
	43	**/\r
	44	RETURN_STATUS\r
	45	EFIAPI\r
	46	StartPerformanceMeasurement (\r
efb23117	47	IN CONST VOID *Handle, OPTIONAL\r
	48	IN CONST CHAR8 *Token, OPTIONAL\r
	49	IN CONST CHAR8 *Module, OPTIONAL\r
e1f414b6	50	IN UINT64 TimeStamp\r
	51	)\r
	52	{\r
	53	return RETURN_SUCCESS;\r
	54	}\r
	55	\r
	56	/**\r
	57	Fills in the end time of a performance measurement. \r
	58	\r
	59	Looks up the record that matches Handle, Token, and Module.\r
	60	If the record can not be found then return RETURN_NOT_FOUND.\r
	61	If the record is found and TimeStamp is not zero,\r
	62	then TimeStamp is added to the record as the end time.\r
	63	If the record is found and TimeStamp is zero, then this function reads\r
	64	the current time stamp and adds that time stamp value to the record as the end time.\r
e1f414b6	65	\r
2fc59a00	66	@param Handle The pointer to environment specific context used\r
e1f414b6	67	to identify the component being measured.\r
2fc59a00	68	@param Token The pointer to a Null-terminated ASCII string\r
e1f414b6	69	that identifies the component being measured.\r
2fc59a00	70	@param Module The pointer to a Null-terminated ASCII string\r
e1f414b6	71	that identifies the module being measured.\r
	72	@param TimeStamp 64-bit time stamp.\r
	73	\r
2fc59a00	74	@retval RETURN_SUCCESS The end of the measurement was recorded.\r
e1f414b6	75	@retval RETURN_NOT_FOUND The specified measurement record could not be found.\r
8404146c	76	@retval RETURN_DEVICE_ERROR A device error reading the time stamp.\r
e1f414b6	77	\r
	78	**/\r
	79	RETURN_STATUS\r
	80	EFIAPI\r
	81	EndPerformanceMeasurement (\r
	82	IN CONST VOID *Handle, OPTIONAL\r
41083587	83	IN CONST CHAR8 *Token, OPTIONAL\r
41083587	84	IN CONST CHAR8 *Module, OPTIONAL\r
e1f414b6	85	IN UINT64 TimeStamp\r
	86	)\r
	87	{\r
	88	return RETURN_SUCCESS;\r
	89	}\r
	90	\r
	91	/**\r
	92	Attempts to retrieve a performance measurement log entry from the performance measurement log. \r
ba14539c SZ	93	It can also retrieve the log created by StartPerformanceMeasurementEx and EndPerformanceMeasurementEx,\r
	94	and then eliminate the Identifier.\r
	95	\r
e1f414b6	96	Attempts to retrieve the performance log entry specified by LogEntryKey. If LogEntryKey is\r
	97	zero on entry, then an attempt is made to retrieve the first entry from the performance log,\r
	98	and the key for the second entry in the log is returned. If the performance log is empty,\r
	99	then no entry is retrieved and zero is returned. If LogEntryKey is not zero, then the performance\r
	100	log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is\r
	101	returned. If LogEntryKey is the key for the last entry in the log, then the last log entry is\r
	102	retrieved and an implementation specific non-zero key value that specifies the end of the performance\r
	103	log is returned. If LogEntryKey is equal this implementation specific non-zero key value, then no entry\r
	104	is retrieved and zero is returned. In the cases where a performance log entry can be returned,\r
	105	the log entry is returned in Handle, Token, Module, StartTimeStamp, and EndTimeStamp.\r
	106	If LogEntryKey is not a valid log entry key for the performance measurement log, then ASSERT().\r
	107	If Handle is NULL, then ASSERT().\r
	108	If Token is NULL, then ASSERT().\r
	109	If Module is NULL, then ASSERT().\r
	110	If StartTimeStamp is NULL, then ASSERT().\r
	111	If EndTimeStamp is NULL, then ASSERT().\r
	112	\r
	113	@param LogEntryKey On entry, the key of the performance measurement log entry to retrieve.\r
	114	0, then the first performance measurement log entry is retrieved.\r
	115	On exit, the key of the next performance lof entry entry.\r
2fc59a00	116	@param Handle The pointer to environment specific context used to identify the component\r
e1f414b6	117	being measured. \r
2fc59a00	118	@param Token The pointer to a Null-terminated ASCII string that identifies the component\r
e1f414b6	119	being measured. \r
2fc59a00	120	@param Module The pointer to a Null-terminated ASCII string that identifies the module\r
e1f414b6	121	being measured.\r
2fc59a00	122	@param StartTimeStamp The pointer to the 64-bit time stamp that was recorded when the measurement\r
e1f414b6	123	was started.\r
2fc59a00	124	@param EndTimeStamp The pointer to the 64-bit time stamp that was recorded when the measurement\r
e1f414b6	125	was ended.\r
	126	\r
	127	@return The key for the next performance log entry (in general case).\r
	128	\r
	129	**/\r
	130	UINTN\r
	131	EFIAPI\r
	132	GetPerformanceMeasurement (\r
	133	IN UINTN LogEntryKey, \r
	134	OUT CONST VOID **Handle,\r
	135	OUT CONST CHAR8 **Token,\r
	136	OUT CONST CHAR8 **Module,\r
	137	OUT UINT64 *StartTimeStamp,\r
	138	OUT UINT64 *EndTimeStamp\r
	139	)\r
	140	{\r
	141	ASSERT (Handle != NULL);\r
	142	ASSERT (Token != NULL);\r
	143	ASSERT (Module != NULL);\r
	144	ASSERT (StartTimeStamp != NULL);\r
	145	ASSERT (EndTimeStamp != NULL);\r
	146	\r
	147	return 0;\r
	148	}\r
	149	\r
ba14539c SZ	150	/**\r
	151	Creates a record for the beginning of a performance measurement.\r
	152	\r
	153	Creates a record that contains the Handle, Token, Module and Identifier.\r
	154	If TimeStamp is not zero, then TimeStamp is added to the record as the start time.\r
	155	If TimeStamp is zero, then this function reads the current time stamp\r
	156	and adds that time stamp value to the record as the start time.\r
	157	\r
	158	@param Handle Pointer to environment specific context used\r
	159	to identify the component being measured.\r
	160	@param Token Pointer to a Null-terminated ASCII string\r
	161	that identifies the component being measured.\r
	162	@param Module Pointer to a Null-terminated ASCII string\r
	163	that identifies the module being measured.\r
	164	@param TimeStamp 64-bit time stamp.\r
	165	@param Identifier 32-bit identifier. If the value is 0, the created record\r
	166	is same as the one created by StartPerformanceMeasurement.\r
	167	\r
	168	@retval RETURN_SUCCESS The start of the measurement was recorded.\r
	169	@retval RETURN_OUT_OF_RESOURCES There are not enough resources to record the measurement.\r
	170	@retval RETURN_DEVICE_ERROR A device error reading the time stamp.\r
	171	\r
	172	**/\r
	173	RETURN_STATUS\r
	174	EFIAPI\r
	175	StartPerformanceMeasurementEx (\r
	176	IN CONST VOID *Handle, OPTIONAL\r
	177	IN CONST CHAR8 *Token, OPTIONAL\r
	178	IN CONST CHAR8 *Module, OPTIONAL\r
	179	IN UINT64 TimeStamp,\r
	180	IN UINT32 Identifier\r
	181	)\r
	182	{\r
	183	return RETURN_SUCCESS;\r
	184	}\r
	185	\r
	186	/**\r
	187	Fills in the end time of a performance measurement.\r
	188	\r
	189	Looks up the record that matches Handle, Token, Module and Identifier.\r
	190	If the record can not be found then return RETURN_NOT_FOUND.\r
	191	If the record is found and TimeStamp is not zero,\r
	192	then TimeStamp is added to the record as the end time.\r
	193	If the record is found and TimeStamp is zero, then this function reads\r
	194	the current time stamp and adds that time stamp value to the record as the end time.\r
	195	\r
	196	@param Handle Pointer to environment specific context used\r
	197	to identify the component being measured.\r
	198	@param Token Pointer to a Null-terminated ASCII string\r
	199	that identifies the component being measured.\r
	200	@param Module Pointer to a Null-terminated ASCII string\r
	201	that identifies the module being measured.\r
	202	@param TimeStamp 64-bit time stamp.\r
	203	@param Identifier 32-bit identifier. If the value is 0, the found record\r
	204	is same as the one found by EndPerformanceMeasurement.\r
	205	\r
	206	@retval RETURN_SUCCESS The end of the measurement was recorded.\r
	207	@retval RETURN_NOT_FOUND The specified measurement record could not be found.\r
	208	@retval RETURN_DEVICE_ERROR A device error reading the time stamp.\r
	209	\r
	210	**/\r
	211	RETURN_STATUS\r
	212	EFIAPI\r
	213	EndPerformanceMeasurementEx (\r
214	IN CONST VOID *Handle, OPTIONAL\r
215	IN CONST CHAR8 *Token, OPTIONAL\r
216	IN CONST CHAR8 *Module, OPTIONAL\r
217	IN UINT64 TimeStamp,\r
218	IN UINT32 Identifier\r
219	)\r
220	{\r
221	return RETURN_SUCCESS;\r
222	}\r
223	\r
224	/**\r
225	Attempts to retrieve a performance measurement log entry from the performance measurement log.\r
226	It can also retrieve the log created by StartPerformanceMeasurement and EndPerformanceMeasurement,\r
227	and then assign the Identifier with 0.\r
228	\r
229	Attempts to retrieve the performance log entry specified by LogEntryKey. If LogEntryKey is\r
230	zero on entry, then an attempt is made to retrieve the first entry from the performance log,\r
231	and the key for the second entry in the log is returned. If the performance log is empty,\r
232	then no entry is retrieved and zero is returned. If LogEntryKey is not zero, then the performance\r
233	log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is\r
234	returned. If LogEntryKey is the key for the last entry in the log, then the last log entry is\r
235	retrieved and an implementation specific non-zero key value that specifies the end of the performance\r
236	log is returned. If LogEntryKey is equal this implementation specific non-zero key value, then no entry\r
237	is retrieved and zero is returned. In the cases where a performance log entry can be returned,\r
238	the log entry is returned in Handle, Token, Module, StartTimeStamp, EndTimeStamp and Identifier.\r
239	If LogEntryKey is not a valid log entry key for the performance measurement log, then ASSERT().\r
240	If Handle is NULL, then ASSERT().\r
241	If Token is NULL, then ASSERT().\r
242	If Module is NULL, then ASSERT().\r
243	If StartTimeStamp is NULL, then ASSERT().\r
244	If EndTimeStamp is NULL, then ASSERT().\r
245	If Identifier is NULL, then ASSERT().\r
246	\r
247	@param LogEntryKey On entry, the key of the performance measurement log entry to retrieve.\r
248	0, then the first performance measurement log entry is retrieved.\r
249	On exit, the key of the next performance lof entry entry.\r
250	@param Handle Pointer to environment specific context used to identify the component\r
251	being measured.\r
252	@param Token Pointer to a Null-terminated ASCII string that identifies the component\r
253	being measured.\r
254	@param Module Pointer to a Null-terminated ASCII string that identifies the module\r
255	being measured.\r
256	@param StartTimeStamp Pointer to the 64-bit time stamp that was recorded when the measurement\r
257	was started.\r
258	@param EndTimeStamp Pointer to the 64-bit time stamp that was recorded when the measurement\r
259	was ended.\r
260	@param Identifier Pointer to the 32-bit identifier that was recorded.\r
261	\r
262	@return The key for the next performance log entry (in general case).\r
263	\r
264	**/\r
265	UINTN\r
266	EFIAPI\r
267	GetPerformanceMeasurementEx (\r
268	IN UINTN LogEntryKey, \r
269	OUT CONST VOID **Handle,\r
270	OUT CONST CHAR8 **Token,\r
271	OUT CONST CHAR8 **Module,\r
272	OUT UINT64 *StartTimeStamp,\r
273	OUT UINT64 *EndTimeStamp,\r
274	OUT UINT32 *Identifier\r
275	)\r
276	{\r
277	ASSERT (Handle != NULL);\r
278	ASSERT (Token != NULL);\r
279	ASSERT (Module != NULL);\r
280	ASSERT (StartTimeStamp != NULL);\r
281	ASSERT (EndTimeStamp != NULL);\r
282	ASSERT (Identifier != NULL);\r
283	\r
284	return 0;\r
285	}\r
286	\r
e1f414b6	287	/**\r
	288	Returns TRUE if the performance measurement macros are enabled. \r
	289	\r
	290	This function returns TRUE if the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of\r
	291	PcdPerformanceLibraryPropertyMask is set. Otherwise FALSE is returned.\r
	292	\r
	293	@retval TRUE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of\r
	294	PcdPerformanceLibraryPropertyMask is set.\r
	295	@retval FALSE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of\r
	296	PcdPerformanceLibraryPropertyMask is clear.\r
	297	\r
	298	**/\r
	299	BOOLEAN\r
	300	EFIAPI\r
	301	PerformanceMeasurementEnabled (\r
	302	VOID\r
	303	)\r
	304	{\r
	305	return (BOOLEAN) ((PcdGet8(PcdPerformanceLibraryPropertyMask) & PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED) != 0);\r
	306	}\r