c892d84644
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3388 6f19259b-4bc3-4df7-8a09-765794883524
167 lines
7.1 KiB
C
167 lines
7.1 KiB
C
/** @file
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Base Performance Library which provides no service.
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Copyright (c) 2006, Intel Corporation<BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Base.h>
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#include <Library/PerformanceLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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/**
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Creates a record for the beginning of a performance measurement.
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Creates a record that contains the Handle, Token, and Module.
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If TimeStamp is not zero, then TimeStamp is added to the record as the start time.
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If TimeStamp is zero, then this function reads the current time stamp
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and adds that time stamp value to the record as the start time.
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@param Handle Pointer to environment specific context used
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to identify the component being measured.
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@param Token Pointer to a Null-terminated ASCII string
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that identifies the component being measured.
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@param Module Pointer to a Null-terminated ASCII string
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that identifies the module being measured.
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@param TimeStamp 64-bit time stamp.
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@retval RETURN_SUCCESS The start of the measurement was recorded.
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@retval RETURN_OUT_OF_RESOURCES There are not enough resources to record the measurement.
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**/
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RETURN_STATUS
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EFIAPI
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StartPerformanceMeasurement (
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IN CONST VOID *Handle, OPTIONAL
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IN CONST CHAR8 *Token,
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IN CONST CHAR8 *Module,
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IN UINT64 TimeStamp
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)
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{
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return RETURN_SUCCESS;
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}
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/**
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Fills in the end time of a performance measurement.
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Looks up the record that matches Handle, Token, and Module.
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If the record can not be found then return RETURN_NOT_FOUND.
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If the record is found and TimeStamp is not zero,
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then TimeStamp is added to the record as the end time.
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If the record is found and TimeStamp is zero, then this function reads
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the current time stamp and adds that time stamp value to the record as the end time.
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If this function is called multiple times for the same record, then the end time is overwritten.
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@param Handle Pointer to environment specific context used
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to identify the component being measured.
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@param Token Pointer to a Null-terminated ASCII string
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that identifies the component being measured.
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@param Module Pointer to a Null-terminated ASCII string
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that identifies the module being measured.
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@param TimeStamp 64-bit time stamp.
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@retval RETURN_SUCCESS The end of the measurement was recorded.
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@retval RETURN_NOT_FOUND The specified measurement record could not be found.
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**/
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RETURN_STATUS
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EFIAPI
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EndPerformanceMeasurement (
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IN CONST VOID *Handle, OPTIONAL
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IN CONST CHAR8 *Token,
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IN CONST CHAR8 *Module,
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IN UINT64 TimeStamp
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)
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{
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return RETURN_SUCCESS;
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}
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/**
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Attempts to retrieve a performance measurement log entry from the performance measurement log.
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Attempts to retrieve the performance log entry specified by LogEntryKey. If LogEntryKey is
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zero on entry, then an attempt is made to retrieve the first entry from the performance log,
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and the key for the second entry in the log is returned. If the performance log is empty,
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then no entry is retrieved and zero is returned. If LogEntryKey is not zero, then the performance
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log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
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returned. If LogEntryKey is the key for the last entry in the log, then the last log entry is
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retrieved and an implementation specific non-zero key value that specifies the end of the performance
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log is returned. If LogEntryKey is equal this implementation specific non-zero key value, then no entry
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is retrieved and zero is returned. In the cases where a performance log entry can be returned,
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the log entry is returned in Handle, Token, Module, StartTimeStamp, and EndTimeStamp.
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If LogEntryKey is not a valid log entry key for the performance measurement log, then ASSERT().
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If Handle is NULL, then ASSERT().
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If Token is NULL, then ASSERT().
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If Module is NULL, then ASSERT().
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If StartTimeStamp is NULL, then ASSERT().
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If EndTimeStamp is NULL, then ASSERT().
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@param LogEntryKey On entry, the key of the performance measurement log entry to retrieve.
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0, then the first performance measurement log entry is retrieved.
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On exit, the key of the next performance lof entry entry.
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@param Handle Pointer to environment specific context used to identify the component
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being measured.
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@param Token Pointer to a Null-terminated ASCII string that identifies the component
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being measured.
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@param Module Pointer to a Null-terminated ASCII string that identifies the module
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being measured.
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@param StartTimeStamp Pointer to the 64-bit time stamp that was recorded when the measurement
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was started.
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@param EndTimeStamp Pointer to the 64-bit time stamp that was recorded when the measurement
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was ended.
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@return The key for the next performance log entry (in general case).
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**/
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UINTN
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EFIAPI
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GetPerformanceMeasurement (
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IN UINTN LogEntryKey,
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OUT CONST VOID **Handle,
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OUT CONST CHAR8 **Token,
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OUT CONST CHAR8 **Module,
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OUT UINT64 *StartTimeStamp,
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OUT UINT64 *EndTimeStamp
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)
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{
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ASSERT (Handle != NULL);
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ASSERT (Token != NULL);
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ASSERT (Module != NULL);
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ASSERT (StartTimeStamp != NULL);
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ASSERT (EndTimeStamp != NULL);
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return 0;
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}
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/**
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Returns TRUE if the performance measurement macros are enabled.
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This function returns TRUE if the PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
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PcdPerformanceLibraryPropertyMask is set. Otherwise FALSE is returned.
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@retval TRUE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
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PcdPerformanceLibraryPropertyMask is set.
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@retval FALSE The PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED bit of
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PcdPerformanceLibraryPropertyMask is clear.
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**/
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BOOLEAN
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EFIAPI
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PerformanceMeasurementEnabled (
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VOID
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)
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{
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return (BOOLEAN) ((PcdGet8(PcdPerformanceLibraryPropertyMask) & PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED) != 0);
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}
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