Leaked source code of windows server 2003
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//-----------------------------------------------------------------------------
//
//
// File: aqreg.h
//
// Description: Header file containing aq's registry constants
//
// Author: Mike Swafford (MikeSwa)
//
// History:
// 1/4/2000 - MikeSwa Created
//
// Copyright (C) 2000 Microsoft Corporation
//
//-----------------------------------------------------------------------------
#ifndef __AQREG_H__
#define __AQREG_H__
//---[ Registry Paths ]--------------------------------------------------------
//
//
// Description:
// These are the registry keys used by AQ for configuration
//
//-----------------------------------------------------------------------------
#define AQREG_KEY_CONFIGURATION "System\\CurrentControlSet\\Services\\SMTPSVC\\Queuing"
#define AQREG_KEY_CONFIGURATION_TESTSETTINGS "System\\CurrentControlSet\\Services\\SMTPSVC\\Queuing\\TestSettings"
//---[ Global Registry Variables ]---------------------------------------------
//
//
// Description:
// The following are the global configuration variables that can be
// affected by registry settings.
//
//-----------------------------------------------------------------------------
//
// Handle management values. When the number of mailmsgs in the system hits
// this threshold, we will start closing handles.
//
_declspec(selectany) DWORD g_cMaxIMsgHandlesThreshold = 1000;_declspec(selectany) DWORD g_cMaxIMsgHandlesAsyncThreshold = 1000;
//
// Used to generate a range of handle thresholds that we will
// use in conjunction with the length of the queue to determine
// if we actually need to close handles.
//
_declspec(selectany) DWORD g_cMaxIMsgHandlesThresholdRangePercent = 20;_declspec(selectany) DWORD g_cMaxIMsgHandlesLowThreshold = g_cMaxIMsgHandlesThreshold;_declspec(selectany) DWORD g_cMaxHandleReserve = 200;
//
// The following is a for optimizing DSN generation. After generating
// a certain number of DSNs, we will quit and go and restart at a later time
//
_declspec(selectany) DWORD g_cMaxSecondsPerDSNsGenerationPass = 10;
//
// The following is the amount of time to wait before retry a reset
// routes after a routing failure
//
_declspec(selectany) DWORD g_cResetRoutesRetryMinutes = 10;
//
// Async Queue retry intervals that can be modified by registry settings
//
_declspec(selectany) DWORD g_cLocalRetryMinutes = 5;_declspec(selectany) DWORD g_cCatRetryMinutes = 60;_declspec(selectany) DWORD g_cRoutingRetryMinutes = 10;_declspec(selectany) DWORD g_cSubmissionRetryMinutes = 60;
//
// Async Queue Adjustment values. We will increase the max number
// of threads per proc by this value
//
_declspec(selectany) DWORD g_cPerProcMaxThreadPoolModifier = 6;
//
// Async Queue Adjustment value. We will request up to this % of
// max ATQ threads *per async queue*. This % is post our modifcation
// as per g_cPerProcMaxThreadPoolModifier.
//
_declspec(selectany) DWORD g_cMaxATQPercent = 90;
//
// Async Queue Thread Timeout value. After we process each item in
// a queue we will check to see if we have been processing longer than
// this number of milliseconds and if we have we will drop the thread.
// This is intended to keep thread times short and the system responsive.
//
_declspec(selectany) DWORD g_cMaxTicksPerATQThread = 10000;
//
// Reset Message status. If this is non-zero, we will reset the
// message status of every message submitted to MP_STATUS_SUBMITTED.
//
_declspec(selectany) DWORD g_fResetMessageStatus = 0;
//
// retry a glitch failures quicker than "normal" failures
//
_declspec(selectany) DWORD g_dwGlitchRetrySeconds = 60;
//
// the maximum number of outstanding CAT or LD operations
//
_declspec(selectany) DWORD g_cMaxPendingCat = 1000;_declspec(selectany) DWORD g_cMaxPendingLocal = 1000;
//
// Internal AsyncQueue tuning parameters
// - NOTE - Some are not registry configurable, because non-zero
// values can cause a deadlock.
_declspec(selectany) DWORD g_cMaxSyncCatQThreads = 5;_declspec(selectany) DWORD g_cItemsPerCatQSyncThread = 10;_declspec(selectany) DWORD g_cItemsPerCatQAsyncThread = 10;
_declspec(selectany) DWORD g_cMaxSyncLocalQThreads = 0;_declspec(selectany) DWORD g_cItemsPerLocalQSyncThread = 10;_declspec(selectany) DWORD g_cItemsPerLocalQAsyncThread = 10;
// Cannot config g_cMaxSyncPostDSNQThreads
// It must be zero to avoid a deadlock (same thread cannot enqueue and dequeue)
const DWORD g_cMaxSyncPostDSNQThreads = 0;const DWORD g_cItemsPerPostDSNQSyncThread = 100;_declspec(selectany) DWORD g_cItemsPerPostDSNQAsyncThread = 100;
// Cannot config g_cMaxSyncRoutingThreads
// It must be zero to avoid a deadlock (same thread cannot enqueue and dequeue)
const DWORD g_cMaxSyncRoutingQThreads = 0;const DWORD g_cItemsPerRoutingQSyncThread = 10;_declspec(selectany) DWORD g_cItemsPerRoutingQAsyncThread = 10;
// Cannot configure g_cMaxSyncSubmitQThreads
// It must be zero to avoid a deadlock (same thread cannot enqueue and dequeue)
const DWORD g_cMaxSyncSubmitQThreads = 0;const DWORD g_cItemsPerSubmitQSyncThread = 10;_declspec(selectany) DWORD g_cItemsPerSubmitQAsyncThread = 10;
// Used to determine the number of threads that will be requested by
// the async workq
_declspec(selectany) DWORD g_cItemsPerWorkQAsyncThread = 10;
//
// Flag to enable registry "Test Settings" values - this must be enabled
// for any of the below testing values to have any effect.
//
_declspec(selectany) DWORD g_fEnableTestSettings = FALSE;
//
// Percentage of failures to cause processing local queues
//
_declspec(selectany) DWORD g_cPreSubmitQueueFailurePercent = 0;_declspec(selectany) DWORD g_cPreRoutingQueueFailurePercent = 0;_declspec(selectany) DWORD g_cPreCatQueueFailurePercent = 0;
//
// Sleep times used for performance analysis.
//
_declspec(selectany) DWORD g_dwSubmitQueueSleepMilliseconds = 0;_declspec(selectany) DWORD g_dwCatQueueSleepMilliseconds = 0;_declspec(selectany) DWORD g_dwRoutingQueueSleepMilliseconds= 0;_declspec(selectany) DWORD g_dwLocalQueueSleepMilliseconds = 0;
// Flag to allow us to delay link removal to repro bug where a queue
// may be added to a removed link if timing is just right
_declspec(selectany) DWORD g_cDelayLinkRemovalSeconds = 0;
// DSNs for message larger than this size will contain only the headers
_declspec(selectany) DWORD g_dwMaxDSNSize = 0xFFFFFFFF; // No limit
//
// Number of *message* failures to allow before marking a message as
// problem and queuing differently
//
_declspec(selectany) DWORD g_cMsgFailuresBeforeMarkingMsgAsProblem = 2;
// Test key to enable "retail asserts" - special asserts which will AV
// in RTL if this key is enabled
_declspec(selectany) DWORD g_fEnableRetailAsserts = FALSE;
//
// Max message objects. This key is slightly special in that it is read
// from a mailmsg configuration key.
//
#define MAILMSG_KEY_CONFIGURATION "Software\\Microsoft\\Exchange\\MailMsg"
_declspec(selectany) DWORD g_cMaxMsgObjects = 100000;
//
// Inline function that sleeps as appropriate
//
inline void SleepForPerfAnalysis(DWORD dwSleepMilliseconds){ if (g_fEnableTestSettings && dwSleepMilliseconds) Sleep(dwSleepMilliseconds);}
//
// Inline function to control test failures
//
inline BOOL fShouldFail(DWORD dwPercent){ if (g_fEnableTestSettings && dwPercent) return (((DWORD)(rand() % 100)) < dwPercent); else return FALSE;}
//
// Implementation of _ASSERTRTL. This will cause an _ASSERT in
// DEBUG and an AV in RTL if the EnableRetailAsserts reg value is set
//
#ifdef DEBUG
#define _ASSERTRTL _ASSERT
#else // RETAIL
inline void _ASSERTRTL(BOOL fExpression){ if (g_fEnableTestSettings && g_fEnableRetailAsserts) { if (!fExpression) { *((int*)0) = 0; // _ASSERTRTL : Trigger an AV here
} }}#endif // DEBUG / RETAIL
//
//Reads config information from the registry and modifies the appropriate globals.
//
VOID ReadGlobalRegistryConfiguration();
#endif //__AQREG_H__
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