/[dtapublic]/projs/trunk/projs/20161106_kicker/c_main.c
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Contents of /projs/trunk/projs/20161106_kicker/c_main.c

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Revision 78 - (show annotations) (download)
Mon Nov 7 03:39:51 2016 UTC (7 years, 3 months ago) by dashley
File MIME type: text/plain
File size: 6764 byte(s)
Implemented looping and CTRL-C/CTRL-BREAK handling.
1 // $Header$
2 //-------------------------------------------------------------------------------------------------
3 //This file is part of "kicker", a program for spawning threads and/or processes periodically in
4 //order to unstall certain Windows programs and scripts. The cause of the stall is unknown, but
5 //it is known that spawning threads and/or processes unstalls the system.
6 //-------------------------------------------------------------------------------------------------
7 //This source code and any program in which it is compiled/used is provided under the MIT License,
8 //reproduced below.
9 //-------------------------------------------------------------------------------------------------
10 //Permission is hereby granted, free of charge, to any person obtaining a copy of
11 //this software and associated documentation files(the "Software"), to deal in the
12 //Software without restriction, including without limitation the rights to use,
13 //copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the
14 //Software, and to permit persons to whom the Software is furnished to do so,
15 //subject to the following conditions :
16 //
17 //The above copyright notice and this permission notice shall be included in all
18 //copies or substantial portions of the Software.
19 //
20 //THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 //IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 //FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
23 //AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 //LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 //OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 //SOFTWARE.
27 //-------------------------------------------------------------------------------------------------
28 #include <assert.h>
29 #include <malloc.h>
30 #include <process.h>
31 #include <stdio.h>
32 #include <string.h>
33 #include <time.h>
34 #include <windows.h>
35
36 #define NELEM(A) (sizeof(A)/sizeof(A[0]))
37
38 void emit_hline_std(void)
39 {
40 printf("----------------------------------------------------------------------------------\n");
41 }
42
43 void emit_mit_license(void)
44 {
45 const char *ref[] =
46 {
47 "Permission is hereby granted, free of charge, to any person obtaining a copy of",
48 "this software and associated documentation files(the \"Software\"), to deal in the",
49 "Software without restriction, including without limitation the rights to use,",
50 "copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the",
51 "Software, and to permit persons to whom the Software is furnished to do so,",
52 "subject to the following conditions :",
53 "",
54 "The above copyright notice and this permission notice shall be included in all",
55 "copies or substantial portions of the Software.",
56 "",
57 "THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR",
58 "IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,",
59 "FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE",
60 "AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER",
61 "LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,",
62 "OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE",
63 "SOFTWARE."
64 };
65
66 size_t i;
67
68 for (i=0; i<NELEM(ref); i++)
69 {
70 printf("%s\n", ref[i]);
71 }
72 }
73
74 const char *kickish_words[] =
75 {
76 "Kick",
77 "Smack",
78 "Slug",
79 "Punch",
80 "Assault",
81 "Hit",
82 "Strike",
83 "Slap",
84 "Smack",
85 "Spank",
86 "Cuff",
87 "Thump",
88 "Swat",
89 "Beat",
90 "Thrash",
91 "Batter",
92 "Pound",
93 "Pummel",
94 "Box",
95 "Whip",
96 "Flog",
97 "Cane",
98 "Wallop",
99 "Bash",
100 "Bop",
101 "Clout",
102 "Clip",
103 "Clobber",
104 "Sock",
105 "Swipe",
106 "Crown",
107 "Belt",
108 "Tan",
109 "Deck",
110 "Floor",
111 "Bump",
112 "Knock",
113 "Bang",
114 "Tap",
115 "Welt"
116 };
117
118 volatile int ctrl_c_or_break_pressed = 0; //volatile because the Visual C++ environment spawns a thread to handle
119 //CTRL-C or CTRL-BREAK.
120
121 BOOL CtrlHandler(DWORD fdwCtrlType)
122 {
123 switch (fdwCtrlType)
124 {
125 case CTRL_C_EVENT:
126 case CTRL_BREAK_EVENT:
127 ctrl_c_or_break_pressed = 1;
128 return(TRUE);
129 //There is no default case. There is no break statement. I've assigned a
130 //magic number to a variable. But the function still works fine.
131 //Can you believe it? It must be a miracle!
132 }
133
134 return(FALSE); //Did I mention the multiple return points? This program should
135 //blow up and wipe out several city blocks!
136 }
137
138 int c_main(int argc, char* argv[])
139 {
140 size_t selector = NELEM(kickish_words) - 1;
141 size_t ui;
142 int first_time = 1;
143
144 emit_hline_std();
145 printf("kicker, Copyright 2016 David T. Ashley (dashley@gmail.com)\n");
146 emit_hline_std();
147 printf("This program is provided under the MIT License, reproduced below.\n");
148 emit_hline_std();
149 emit_mit_license();
150 emit_hline_std();
151 printf("This program accepts no command-line arguments and simply spawns a new thread\n");
152 printf("approximately every 1 second. The purpose of the program is to prevent\n");
153 printf("certain stalls that occur under Windows when running some programs/scripts\n");
154 printf("It is known that spawning a new thread periodically unstalls the programs/\n");
155 printf("scripts. The program can be terminated with CTRL-C or CTRL-BREAK.\n");
156 emit_hline_std();
157
158 SetConsoleCtrlHandler((PHANDLER_ROUTINE)CtrlHandler, TRUE);
159 //Yes, I know I'm supposed to check the return code.
160
161 while (! ctrl_c_or_break_pressed)
162 {
163 //Backspace over the previous word.
164 if (! first_time)
165 {
166 //Beep(750, 500);
167
168 for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
169 {
170 printf("%c", (char)8);
171 }
172 for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
173 {
174 printf(" ");
175 }
176 for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
177 {
178 printf("%c", (char)8);
179 }
180 }
181
182 first_time = 0;
183
184 //Go to next string.
185 if (selector < (NELEM(kickish_words) - 1))
186 selector++;
187 else
188 selector = 0;
189
190 //Print the description.
191 printf("%s!", kickish_words[selector]);
192
193 //Delay. Sleep() is likely the most effective way to not waste CPU capacity.
194 Sleep(1000);
195 }
196
197 printf("\n");
198 emit_hline_std();
199 printf("Program terminated with CTRL-C or CTRL-BREAK.\n");
200 emit_hline_std();
201
202 return(0);
203 }
204
205 // End of c_main.c.

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