/** @file | |
Base Performance Library which provides no service. | |
Copyright (c) 2006, Intel Corporation<BR> | |
All rights reserved. This program and the accompanying materials | |
are licensed and made available under the terms and conditions of the BSD License | |
which accompanies this distribution. The full text of the license may be found at | |
http://opensource.org/licenses/bsd-license.php | |
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
Module Name: PerformanceLib.c | |
**/ | |
/** | |
Creates a record for the beginning of a performance measurement. | |
Creates a record that contains the Handle, Token, and Module. | |
If TimeStamp is not zero, then TimeStamp is added to the record as the start time. | |
If TimeStamp is zero, then this function reads the current time stamp | |
and adds that time stamp value to the record as the start time. | |
@param Handle Pointer to environment specific context used | |
to identify the component being measured. | |
@param Token Pointer to a Null-terminated ASCII string | |
that identifies the component being measured. | |
@param Module Pointer to a Null-terminated ASCII string | |
that identifies the module being measured. | |
@param TimeStamp 64-bit time stamp. | |
@retval RETURN_SUCCESS The start of the measurement was recorded. | |
@retval RETURN_OUT_OF_RESOURCES There are not enough resources to record the measurement. | |
**/ | |
RETURN_STATUS | |
EFIAPI | |
StartPerformanceMeasurement ( | |
IN CONST VOID *Handle, OPTIONAL | |
IN CONST CHAR8 *Token, | |
IN CONST CHAR8 *Module, | |
IN UINT64 TimeStamp | |
) | |
{ | |
return RETURN_SUCCESS; | |
} | |
/** | |
Fills in the end time of a performance measurement. | |
Looks up the record that matches Handle, Token, and Module. | |
If the record can not be found then return RETURN_NOT_FOUND. | |
If the record is found and TimeStamp is not zero, | |
then TimeStamp is added to the record as the end time. | |
If the record is found and TimeStamp is zero, then this function reads | |
the current time stamp and adds that time stamp value to the record as the end time. | |
If this function is called multiple times for the same record, then the end time is overwritten. | |
@param Handle Pointer to environment specific context used | |
to identify the component being measured. | |
@param Token Pointer to a Null-terminated ASCII string | |
that identifies the component being measured. | |
@param Module Pointer to a Null-terminated ASCII string | |
that identifies the module being measured. | |
@param TimeStamp 64-bit time stamp. | |
@retval RETURN_SUCCESS The end of the measurement was recorded. | |
@retval RETURN_NOT_FOUND The specified measurement record could not be found. | |
**/ | |
RETURN_STATUS | |
EFIAPI | |
EndPerformanceMeasurement ( | |
IN CONST VOID *Handle, OPTIONAL | |
IN CONST CHAR8 *Token, | |
IN CONST CHAR8 *Module, | |
IN UINT64 TimeStamp | |
) | |
{ | |
return RETURN_SUCCESS; | |
} | |
/** | |
Retrieves a previously logged performance measurement. | |
Retrieves the performance log entry from the performance log | |
that immediately follows the log entry specified by LogEntryKey. | |
If LogEntryKey is zero, then the first entry from the performance log is returned. | |
If the log entry specified by LogEntryKey is the last entry in the performance log, | |
then 0 is returned. Otherwise, the performance log entry is returned in Handle, | |
Token, Module, StartTimeStamp, and EndTimeStamp. | |
The key for the current performance log entry is returned. | |
@param LogEntryKey The key for the previous performance measurement log entry. | |
If 0, then the first performance measurement log entry is retrieved. | |
@param Handle Pointer to environment specific context used | |
to identify the component being measured. | |
@param Token Pointer to a Null-terminated ASCII string | |
that identifies the component being measured. | |
@param Module Pointer to a Null-terminated ASCII string | |
that identifies the module being measured. | |
@param StartTimeStamp The 64-bit time stamp that was recorded when the measurement was started. | |
@param EndTimeStamp The 64-bit time stamp that was recorded when the measurement was ended. | |
@return The key for the current performance log entry. | |
**/ | |
UINTN | |
EFIAPI | |
GetPerformanceMeasurement ( | |
UINTN LogEntryKey, | |
OUT CONST VOID **Handle, | |
OUT CONST CHAR8 **Token, | |
OUT CONST CHAR8 **Module, | |
OUT UINT64 *StartTimeStamp, | |
OUT UINT64 *EndTimeStamp | |
) | |
{ | |
ASSERT (Handle != NULL); | |
ASSERT (Token != NULL); | |
ASSERT (Module != NULL); | |
ASSERT (StartTimeStamp != NULL); | |
ASSERT (EndTimeStamp != NULL); | |
return 0; | |
} | |
/** | |
Returns TRUE if the performance measurement macros are enabled. | |
This function returns TRUE if the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of | |
PcdPerformanceLibraryPropertyMask is set. Otherwise FALSE is returned. | |
@retval TRUE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of | |
PcdPerformanceLibraryPropertyMask is set. | |
@retval FALSE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of | |
PcdPerformanceLibraryPropertyMask is clear. | |
**/ | |
BOOLEAN | |
EFIAPI | |
PerformanceMeasurementEnabled ( | |
VOID | |
) | |
{ | |
return ((PcdGet8(PcdPerformanceLibraryPropertyMask) & PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED) != 0); | |
} |