1// Licensed to the .NET Foundation under one or more agreements.
2// The .NET Foundation licenses this file to you under the MIT license.
3// See the LICENSE file in the project root for more information.
4
5/*============================================================
6**
7** Source : test.c
8**
9** Purpose: InterlockedDecrement() function
10**
11** The test case spawns MAX_THREADS Threads, and each thread call InterlockedDecrement Function to decrement a
12** global counter REPEAT_COUNT Times. The Test case sets the global counter to MAX_THREADS * REPEAT_COUNT
13** at the begining of the test. The test cases passes if at the end the test the value of the global counter is Zero.
14**
15**
16**=========================================================*/
17
18#include <palsuite.h>
19#define MAX_THREADS 64
20#define REPEAT_COUNT 10000
21
22LONG GlobalCounter = 0;
23void DecrementCounter(void);
24
25int __cdecl main(int argc, char *argv[])
26{
27
28 LONG TotalOperations=0;
29 int i=0;
30 DWORD dwThreadID = 0;
31 HANDLE hThread[MAX_THREADS];
32 TotalOperations = MAX_THREADS * REPEAT_COUNT;
33 GlobalCounter = TotalOperations;
34
35 /*
36 * Initialize the PAL and return FAILURE if this fails
37 */
38 if(0 != (PAL_Initialize(argc, argv)))
39 {
40 return FAIL;
41 }
42
43 //Create MAX_THREADS threads that will operate on the global counter
44 for (i=0;i<MAX_THREADS;i++)
45 {
46 hThread[i] = CreateThread(
47 NULL, // default security attributes
48 0, // use default stack size
49 (LPTHREAD_START_ROUTINE) DecrementCounter, // thread function
50 NULL, // argument to thread function
51 0, // use default creation flags
52 &dwThreadID); // returns the thread identifier
53
54 // Check the return value for success.
55
56 if (hThread[i] == NULL)
57 {
58 Fail("ERROR: Was not able to create thread\n"
59 "GetLastError returned %d\n", GetLastError());
60 }
61 }
62
63 //Wait for all threads to finish
64 for (i=0;i<MAX_THREADS;i++)
65 {
66 if (WAIT_OBJECT_0 != WaitForSingleObject (hThread[i], INFINITE))
67 {
68 Fail ("Main: Wait for Single Object failed. Failing test.\n"
69 "GetLastError returned %d\n", GetLastError());
70 }
71 }
72
73 /* Compare the value of global counter with zero.
74 */
75 if (0!=GlobalCounter)
76 {
77 Fail("Test Case Failed: InterlockedDecrement \n");
78 }
79
80 PAL_Terminate();
81 return PASS;
82}
83
84void DecrementCounter(void)
85{
86 int i=0;
87 for (i=0; i<REPEAT_COUNT;i++)
88 {
89 InterlockedDecrement(&GlobalCounter);
90 }
91}
92
93
94
95