projs/20161106_kicker/c_main.c

//$Header$
//-------------------------------------------------------------------------------------------------
//This file is part of "kicker", a program for spawning threads and/or processes periodically in
//order to unstall certain Windows programs and scripts.  The cause of the stall is unknown, but
//it is known that spawning threads and/or processes unstalls the system.
//-------------------------------------------------------------------------------------------------
//This source code and any program in which it is compiled/used is provided under the MIT License,
//reproduced below.
//-------------------------------------------------------------------------------------------------
//Permission is hereby granted, free of charge, to any person obtaining a copy of
//this software and associated documentation files(the "Software"), to deal in the
//Software without restriction, including without limitation the rights to use,
//copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the
//Software, and to permit persons to whom the Software is furnished to do so,
//subject to the following conditions :
//
//The above copyright notice and this permission notice shall be included in all
//copies or substantial portions of the Software.
//
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//SOFTWARE.
//-------------------------------------------------------------------------------------------------
#include <assert.h>
#include <malloc.h>
#include <process.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <windows.h>

#define NELEM(A)  (sizeof(A)/sizeof(A[0]))

void emit_hline_std(void)
{
   printf("----------------------------------------------------------------------------------\n");
}

void emit_mit_license(void)
{
   const char *ref[] =
   {
      "Permission is hereby granted, free of charge, to any person obtaining a copy of",
      "this software and associated documentation files(the \"Software\"), to deal in the",
      "Software without restriction, including without limitation the rights to use,",
      "copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the",
      "Software, and to permit persons to whom the Software is furnished to do so,",
      "subject to the following conditions :",
      "",
      "The above copyright notice and this permission notice shall be included in all",
      "copies or substantial portions of the Software.",
      "",
      "THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR",
      "IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,",
      "FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE",
      "AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER",
      "LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,",
      "OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE",
      "SOFTWARE."
   };

   size_t i;

   for (i=0; i<NELEM(ref); i++)
   {
      printf("%s\n", ref[i]);
   }
}

const char *kickish_words[] = 
{
   "Kick",
   "Smack",
   "Slug",
   "Punch",
   "Assault",
   "Hit",
   "Strike",
   "Slap",
   "Smack",
   "Spank",
   "Cuff",
   "Thump",
   "Swat",
   "Beat",
   "Thrash",
   "Batter",
   "Pound",
   "Pummel",
   "Box",
   "Whip",
   "Flog",
   "Cane",
   "Wallop",
   "Bash",
   "Bop",
   "Clout",
   "Clip",
   "Clobber",
   "Sock",
   "Swipe",
   "Crown",
   "Belt",
   "Tan",
   "Deck",
   "Floor",
   "Bump",
   "Knock",
   "Bang",
   "Tap",
   "Welt"
};

volatile int ctrl_c_or_break_pressed = 0;  //volatile because the Visual C++ environment spawns a thread to handle
                                           //CTRL-C or CTRL-BREAK.
volatile int thread_ran = 0;               //volatile because shared with thread.


BOOL CtrlHandler(DWORD fdwCtrlType)
{
   switch (fdwCtrlType)
   {
      case CTRL_C_EVENT:
      case CTRL_BREAK_EVENT:
         ctrl_c_or_break_pressed = 1;
         return(TRUE);
      //There is no default case.  There is no break statement.  I've assigned a
      //magic number to a variable.  But the function still works fine.
      //Can you believe it?  It must be a miracle!
   }

   return(FALSE);  //Did I mention the multiple return points?  This program should
                   //blow up and wipe out several city blocks!
}


//Thread function.  Parameter ignored.
DWORD WINAPI MyThreadFunction(LPVOID lpParam)
{
   thread_ran = 1;

   return (0);
}


int c_main(int argc, char* argv[])
{
   size_t selector = NELEM(kickish_words) - 1;
   size_t ui;
   int first_time = 1;
   HANDLE thread_handle;
   DWORD  thread_id;

   emit_hline_std();
   printf("kicker, Copyright 2016 David T. Ashley (dashley@gmail.com)\n");
   emit_hline_std();
   printf("This program is provided under the MIT License, reproduced below.\n");
   emit_hline_std();
   emit_mit_license();
   emit_hline_std();
   printf("This program accepts no command-line arguments and simply spawns a new thread\n");
   printf("approximately every 1 second.  The purpose of the program is to prevent\n");
   printf("certain stalls that occur under Windows when running some programs/scripts\n");
   printf("It is known that spawning a new thread periodically unstalls the programs/\n");
   printf("scripts.  The program can be terminated with CTRL-C or CTRL-BREAK.\n");
   emit_hline_std();

   SetConsoleCtrlHandler((PHANDLER_ROUTINE)CtrlHandler, TRUE);
      //Yes, I know I'm supposed to check the return code.

   while (! ctrl_c_or_break_pressed)
   {
       //Backspace over the previous word.
       if (! first_time)
       {
          //Beep(750, 500);

          for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
          {
             printf("%c", (char)8);
          }
          for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
          {
             printf(" ");
          }
          for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
          {
             printf("%c", (char)8);
          }
       }

       first_time = 0;

       //Go to next string.
       if (selector < (NELEM(kickish_words) - 1))
          selector++;
       else
          selector = 0;

       //Print the description.
       printf("%s!", kickish_words[selector]);

           //Start the thread.  This will hopefully unstall things.
           thread_handle = CreateThread(
                   NULL,                   // default security attributes
                   0,                      // use default stack size  
                   MyThreadFunction,       // thread function name
                   0,                      // argument to thread function 
                   0,                      // use default creation flags 
                   &thread_id);            // returns the thread identifier

           //If the create call failed, terminate.
           if (thread_handle == NULL)
           {
                   printf("\nOuch!\n");
                   exit(0);
           }

           //Wait for thread termination.  This should be nearly instant.  But it
           //would seem to be the best way to wait so as not to chew up CPU
           //cycles.
           WaitForSingleObject(thread_handle, INFINITE);

           //At this point, the thread should have run, and the variable should have been
           //set.  If not, there is a real logical problem.
           if (!thread_ran)
           {
                   printf("\nDouble-ouch\n");
                   exit(0);
           }

           thread_ran = 0;

           //Delay.  Sleep() is likely the most effective way to not waste CPU capacity.
       Sleep(1000);
   }

   printf("\n");
   emit_hline_std();
   printf("Program terminated with CTRL-C or CTRL-BREAK.\n");
   emit_hline_std();

   return(0);
}

// End of c_main.c.
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	volatile int thread_ran = 0; //volatile because shared with thread.
121
122
123	BOOL CtrlHandler(DWORD fdwCtrlType)
124	{
125	switch (fdwCtrlType)
126	{
127	case CTRL_C_EVENT:
128	case CTRL_BREAK_EVENT:
129	ctrl_c_or_break_pressed = 1;
130	return(TRUE);
131	//There is no default case. There is no break statement. I've assigned a
132	//magic number to a variable. But the function still works fine.
133	//Can you believe it? It must be a miracle!
134	}
135
136	return(FALSE); //Did I mention the multiple return points? This program should
137	//blow up and wipe out several city blocks!
138	}
139
140
141	//Thread function. Parameter ignored.
142	DWORD WINAPI MyThreadFunction(LPVOID lpParam)
143	{
144	thread_ran = 1;
145
146	return (0);
147	}
148
149
150	int c_main(int argc, char* argv[])
151	{
152	size_t selector = NELEM(kickish_words) - 1;
153	size_t ui;
154	int first_time = 1;
155	HANDLE thread_handle;
156	DWORD thread_id;
157
158	emit_hline_std();
159	printf("kicker, Copyright 2016 David T. Ashley (dashley@gmail.com)\n");
160	emit_hline_std();
161	printf("This program is provided under the MIT License, reproduced below.\n");
162	emit_hline_std();
163	emit_mit_license();
164	emit_hline_std();
165	printf("This program accepts no command-line arguments and simply spawns a new thread\n");
166	printf("approximately every 1 second. The purpose of the program is to prevent\n");
167	printf("certain stalls that occur under Windows when running some programs/scripts\n");
168	printf("It is known that spawning a new thread periodically unstalls the programs/\n");
169	printf("scripts. The program can be terminated with CTRL-C or CTRL-BREAK.\n");
170	emit_hline_std();
171
172	SetConsoleCtrlHandler((PHANDLER_ROUTINE)CtrlHandler, TRUE);
173	//Yes, I know I'm supposed to check the return code.
174
175	while (! ctrl_c_or_break_pressed)
176	{
177	//Backspace over the previous word.
178	if (! first_time)
179	{
180	//Beep(750, 500);
181
182	for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
183	{
184	printf("%c", (char)8);
185	}
186	for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
187	{
188	printf(" ");
189	}
190	for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
191	{
192	printf("%c", (char)8);
193	}
194	}
195
196	first_time = 0;
197
198	//Go to next string.
199	if (selector < (NELEM(kickish_words) - 1))
200	selector++;
201	else
202	selector = 0;
203
204	//Print the description.
205	printf("%s!", kickish_words[selector]);
206
207	//Start the thread. This will hopefully unstall things.
208	thread_handle = CreateThread(
209	NULL, // default security attributes
210	0, // use default stack size
211	MyThreadFunction, // thread function name
212	0, // argument to thread function
213	0, // use default creation flags
214	&thread_id); // returns the thread identifier
215
216	//If the create call failed, terminate.
217	if (thread_handle == NULL)
218	{
219	printf("\nOuch!\n");
220	exit(0);
221	}
222
223	//Wait for thread termination. This should be nearly instant. But it
224	//would seem to be the best way to wait so as not to chew up CPU
225	//cycles.
226	WaitForSingleObject(thread_handle, INFINITE);
227
228	//At this point, the thread should have run, and the variable should have been
229	//set. If not, there is a real logical problem.
230	if (!thread_ran)
231	{
232	printf("\nDouble-ouch\n");
233	exit(0);
234	}
235
236	thread_ran = 0;
237
238	//Delay. Sleep() is likely the most effective way to not waste CPU capacity.
239	Sleep(1000);
240	}
241
242	printf("\n");
243	emit_hline_std();
244	printf("Program terminated with CTRL-C or CTRL-BREAK.\n");
245	emit_hline_std();
246
247	return(0);
248	}
249
250	// End of c_main.c.