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[reactos.git] / modules / rostests / drivers / memtest / memtest.c
1 /*
2 * Memory Manager Information and Test driver
3 *
4 * Copyright 2006 Aleksey Bragin <alekset@reactos.org>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; see the file COPYING.LIB.
18 * If not, write to the Free Software Foundation,
19 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22 /* INCLUDES *******************************************************************/
23
24 #include <ddk/ntddk.h>
25 #include "memtest.h"
26
27 //#define NDEBUG
28 #include <debug.h>
29
30 HANDLE MonitorThreadHandle;
31
32 /* FUNCTIONS ***********************************************************/
33
34 static VOID NTAPI
35 MonitorThread(PVOID Ignored)
36 {
37 SYSTEM_PERFORMANCE_INFORMATION PerformanceInfo;
38 ULONG Length;
39 LARGE_INTEGER Interval, SystemTime;
40
41 /* Main loop */
42 while (TRUE)
43 {
44 Interval.QuadPart = -300 * 10000; // 300 ms
45
46 /* Query information */
47 if (ZwQuerySystemInformation(SystemPerformanceInformation,
48 (PVOID) &PerformanceInfo,
49 sizeof(SYSTEM_PERFORMANCE_INFORMATION),
50 &Length) != STATUS_SUCCESS)
51 {
52 break;
53 }
54
55 /* Query current system time */
56 KeQuerySystemTime(&SystemTime);
57
58
59 DbgPrint("%I64d;%d;%d\n", SystemTime.QuadPart,
60 PerformanceInfo.CommittedPages, PerformanceInfo.AvailablePages);
61
62 /* Wait for a bit. */
63 KeDelayExecutionThread(KernelMode, FALSE, &Interval);
64 }
65
66 DPRINT("Finishing monitoring thread.\n");
67
68 PsTerminateSystemThread(0);
69 }
70
71
72 VOID
73 StartMemoryMonitor()
74 {
75 NTSTATUS Status;
76
77 Status = PsCreateSystemThread(
78 &MonitorThreadHandle,
79 THREAD_ALL_ACCESS,
80 NULL,
81 NULL,
82 NULL,
83 MonitorThread,
84 NULL);
85
86 if (!NT_SUCCESS(Status))
87 {
88 DPRINT1("Failed to start a monitoring thread\n");
89 return;
90 }
91 }
92
93 /* PUBLIC FUNCTIONS ***********************************************************/
94
95 /*
96 * DriverEntry
97 */
98 NTSTATUS
99 NTAPI
100 DriverEntry(PDRIVER_OBJECT DriverObject,
101 PUNICODE_STRING RegistryPath)
102 {
103 DbgPrint("\n===============================================\n Memory Manager Information and Test driver\n");
104 DbgPrint("Time;Memory pages allocated;Memory pages free\n");
105
106
107 StartMemoryMonitor();
108
109 return STATUS_SUCCESS;
110 }