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	dashley	79	//$Header$
2	dashley	77	//-------------------------------------------------------------------------------------------------
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	dashley	78	#include <windows.h>
35	dashley	77
36	dashley	78	#define NELEM(A) (sizeof(A)/sizeof(A[0]))
37	dashley	77
38	dashley	78	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	dashley	79	volatile int thread_ran = 0; //volatile because shared with thread.
121	dashley	78
122	dashley	79
123	dashley	78	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	dashley	79
141			//Thread function. Parameter ignored.
142			DWORD WINAPI MyThreadFunction(LPVOID lpParam)
143			{
144			thread_ran = 1;
145
146			return (0);
147			}
148
149
150	dashley	77	int c_main(int argc, char* argv[])
151	dashley	78	{
152			size_t selector = NELEM(kickish_words) - 1;
153			size_t ui;
154			int first_time = 1;
155	dashley	79	HANDLE thread_handle;
156			DWORD thread_id;
157	dashley	78
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	dashley	77	{
177	dashley	78	//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	dashley	79	//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	dashley	78	Sleep(1000);
240	dashley	77	}
241
242	dashley	78	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	dashley	77	// End of c_main.c.