477 lines
8.3 KiB
C
477 lines
8.3 KiB
C
/*--
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Copyright (c) 1995 Microsoft Corporation
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Module Name:
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perfutil.c
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Abstract:
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This file implements the utility routines used to construct the common
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parts of a PERF_INSTANCE_DEFINITION (see winperf.h) and perform event
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logging functions
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Authors:
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Stephane Plante (2/2/95)
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Revision History:
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--*/
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//
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// Include Files
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//
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#include <nt.h>
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#include <ntrtl.h>
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#include <nturtl.h>
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#include <windows.h>
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#include <string.h>
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#include <winperf.h>
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#include "histctrs.h"
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#include "perfmsg.h"
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#include "perfutil.h"
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#define INITIAL_SIZE 1024L
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#define EXTEND_SIZE 1024L
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//
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// Global Data Definitions
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//
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ULONG ulInfoBufferSize = 0;
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HANDLE hEventLog = NULL;
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DWORD dwLogUsers = 0;
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DWORD MESSAGE_LEVEL = 0;
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WCHAR GLOBAL_STRING[] = L"Global";
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WCHAR FOREIGN_STRING[] = L"Foreign";
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WCHAR COSTLY_STRING[] = L"Costly";
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WCHAR NULL_STRING[] = L"\0";
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//
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// test for delimiters, end of line and non-digit characters. Used by
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// IsNumberInUnicodeList routine
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//
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#define DIGIT 1
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#define DELIMITER 2
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#define INVALID 3
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#define EvalThisChar(c,d) ( \
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(c == d) ? DELIMITER : \
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(c == 0) ? DELIMITER : \
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(c < (WCHAR)'0') ? INVALID : \
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(c > (WCHAR)'9') ? INVALID : \
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DIGIT)
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HANDLE
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MonOpenEventLog (
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)
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/*++
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Routine Description:
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Reads the level of event logging from the registry and opesn the channel
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to the event logger for subsequent event log entries.
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Arguments:
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None
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Return Value:
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Handle to the event LOG for reporting events
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Revision History:
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--*/
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{
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HKEY hAppKey;
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TCHAR LogLevelKeyName[] = "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Perflib";
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TCHAR LogLevelValueName[] = "EventLogLevel";
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LONG lStatus;
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DWORD dwLogLevel;
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DWORD dwValueType;
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DWORD dwValueSize;
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//
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// if global value of the logging level not initialized or disabled
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//
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if (!MESSAGE_LEVEL) {
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lStatus = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
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LogLevelKeyName,
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0,
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KEY_READ,
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&hAppKey);
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dwValueSize = sizeof(dwLogLevel);
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if (lStatus == ERROR_SUCCESS) {
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lStatus = RegQueryValueEx(hAppKey,
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LogLevelValueName,
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(LPDWORD)NULL,
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&dwValueType,
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(LPBYTE)&dwLogLevel,
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&dwValueSize);
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if (lStatus == ERROR_SUCCESS) {
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MESSAGE_LEVEL = dwLogLevel;
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} else {
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MESSAGE_LEVEL = MESSAGE_LEVEL_DEFAULT;
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}
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RegCloseKey(hAppKey);
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} else {
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MESSAGE_LEVEL = MESSAGE_LEVEL_DEFAULT;
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}
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}
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if (hEventLog == NULL) {
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hEventLog = RegisterEventSource(
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(LPTSTR)NULL,
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APP_NAME);
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if (hEventLog != NULL) {
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REPORT_INFORMATION (UTIL_LOG_OPEN, LOG_DEBUG);
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}
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}
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if (hEventLog != NULL) {
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dwLogUsers++;
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}
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return (hEventLog);
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} // end MonOpenEventLog
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VOID
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MonCloseEventLog(
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)
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/*++
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Routine Description:
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Closes the handle to the event logger is this is the last caller.
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Arguments:
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None
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Return Value:
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None
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--*/
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{
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if (hEventLog != NULL) {
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dwLogUsers--;
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if (dwLogUsers <= 0) {
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REPORT_INFORMATION(UTIL_CLOSING_LOG, LOG_DEBUG);
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DeregisterEventSource(hEventLog);
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}
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}
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} // end MonCloseEventLog
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DWORD
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GetQueryType(
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IN LPWSTR lpValue
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)
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/*++
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Routine Description:
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Returns the type of query described in the lpValue String so that the
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appropriate processing method may be used
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Arguments
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IN lpvalue
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string passed to PerfRegQUery Value for processing
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Return Value
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QUERY_GLOBAL
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if lpValue == 0 (NULL)
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lpValue == pointer to NULL_STRING
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lpValue == pointer to GLOBAL_STRING
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QUERY_FOREIGN
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if lpValue == pointer to FOREIGN_STRING
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QUERY_COSTLY
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if lpValue == pointer to COSTLY_STRING
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QUERY_ITEMS:
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All other cases
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--*/
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{
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WCHAR *pwcArgChar, *pwcTypeChar;
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BOOL bFound;
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if (lpValue == 0 || *lpValue == 0) {
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return QUERY_GLOBAL;
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}
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// Check for Global Request
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pwcArgChar = lpValue;
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pwcTypeChar = GLOBAL_STRING;
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bFound = TRUE;
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while ((*pwcArgChar != 0) && (*pwcTypeChar != 0)) {
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if (*pwcArgChar++ != *pwcTypeChar++) {
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bFound = FALSE;
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break;
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}
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}
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if (bFound) {
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return QUERY_GLOBAL;
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}
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// Check for Foreign Request
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pwcArgChar = lpValue;
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pwcTypeChar = FOREIGN_STRING;
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bFound = TRUE;
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while ((*pwcArgChar != 0) && (*pwcTypeChar != 0)) {
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if (*pwcArgChar++ != *pwcTypeChar++) {
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bFound = FALSE;
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break;
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}
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}
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if (bFound) {
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return QUERY_FOREIGN;
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}
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// Check for Costly Request
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pwcArgChar = lpValue;
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pwcTypeChar = COSTLY_STRING;
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bFound = TRUE;
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while ((*pwcArgChar != 0) && (*pwcTypeChar != 0)) {
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if (*pwcArgChar++ != *pwcTypeChar++) {
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bFound = FALSE;
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break;
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}
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}
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if (bFound) {
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return QUERY_COSTLY;
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}
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//
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// This is the only remaining choice
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//
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return QUERY_ITEMS;
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}
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BOOL
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IsNumberInUnicodeList(
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IN DWORD dwNumber,
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IN LPWSTR lpwszUnicodeList
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)
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/*++
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Routine Description:
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Arguments:
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IN dwNumber
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DWORD number to find in list
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IN lpwszUnicodeList
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NULL terminated, space delimited list of decimal numbers
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Return Value:
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TRUE:
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dwNumber found in list
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FALSE:
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dwNumber not found in list
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--*/
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{
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DWORD dwThisNumber;
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WCHAR *pwcThisChar;
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BOOL bValidNumber;
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BOOL bNewItem;
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BOOL bReturnValue;
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WCHAR wcDelimiter;
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if (lpwszUnicodeList == 0) {
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return FALSE;
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}
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pwcThisChar = lpwszUnicodeList;
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dwThisNumber = 0;
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wcDelimiter = (WCHAR)' ';
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bValidNumber = FALSE;
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bNewItem = TRUE;
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while (TRUE) {
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switch(EvalThisChar (*pwcThisChar, wcDelimiter) ) {
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case DIGIT:
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//
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// if this is the first digit after a delimiter, then set
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// flags to start computing new number;
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//
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if (bNewItem) {
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bNewItem = FALSE;
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bValidNumber = TRUE;
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}
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if (bValidNumber) {
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dwThisNumber *= 10;
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dwThisNumber += (*pwcThisChar - (WCHAR)'0');
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}
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break;
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case DELIMITER:
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//
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// a delimiter is either the delimiter character or the end
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// of the string, if when the delimiter has been reached, a valid
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// number was found, then compoare it to the
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// number from the argument list. if this is the end of the
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// string and no match was found, then return.
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//
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if (bValidNumber) {
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if (dwThisNumber == dwNumber) {
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return TRUE;
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}
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bValidNumber = FALSE;
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}
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if (*pwcThisChar == 0) {
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return FALSE;
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} else {
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bNewItem = TRUE;
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dwThisNumber = 0;
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}
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break;
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case INVALID:
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default:
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//
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// if an invalid character was encountered, ignore all characters
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// upto the next delimiter and then start fresh. The invalid number
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// is NOT compared.
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//
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bValidNumber = FALSE;
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break;
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}
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pwcThisChar++;
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}
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} // End IsNumberInUnicodeList
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BOOL
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MonBuildInstanceDefinition(
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PERF_INSTANCE_DEFINITION *pBuffer,
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PVOID *pBufferNext,
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DWORD ParentObjectTitleIndex,
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DWORD ParentObjectInstance,
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DWORD UniqueId,
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PUNICODE_STRING Name)
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/*++
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Routine Description:
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Build an instance of an object
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Arguments:
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pBuffer = pointer to buffer where instance is to be contructed
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pBufferNext = pointer to a pointer which will contain next available
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location, DWORD aligned
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ParentObjectTitleIndex = Title index of Parent object type; 0 if no
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parent object.
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ParentObjectInstance = Index into instances of parent object type,
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starting at 0, for this instances parent object instance
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UniqueID = a unique identifier which should be used instead of the
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the name for identifying this instance
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Name = name of this instance
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Returns
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0
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--*/
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{
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DWORD NameLength;
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WCHAR *pName;
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//
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// Include Trailing NULL in name size
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//
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NameLength = Name->Length;
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if (!NameLength ||
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Name->Buffer[(NameLength/sizeof(WCHAR)) - 1] != UNICODE_NULL) {
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NameLength += sizeof(WCHAR);
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}
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pBuffer->ByteLength = sizeof(PERF_INSTANCE_DEFINITION) + DWORD_MULTIPLE(NameLength);
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pBuffer->ParentObjectTitleIndex = ParentObjectInstance;
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pBuffer->UniqueID = UniqueId;
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pBuffer->NameOffset = sizeof(PERF_INSTANCE_DEFINITION);
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pBuffer->NameLength = NameLength;
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pName = (PWCHAR)&pBuffer[1];
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RtlMoveMemory(pName,Name->Buffer,Name->Length);
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//
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// Always Null Terminated. Space for this has been reserved
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//
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pName[(NameLength/sizeof(WCHAR))-1] = UNICODE_NULL;
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*pBufferNext = (PVOID) ((PCHAR) pBuffer + pBuffer->ByteLength);
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return 0;
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}
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