projs/20161106_kicker/c_main.c

//$Header$
//-------------------------------------------------------------------------------------------------
//This file is part of "kicker", a program for spawning threads periodically in order to
//unstall certain Windows programs and scripts.  The cause of the stall is unknown, but
//it is known that spawning threads 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 <process.h>
#include <stdio.h>
#include <string.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 made available 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	dashley	85	//This file is part of "kicker", a program for spawning threads periodically in order to
4			//unstall certain Windows programs and scripts. The cause of the stall is unknown, but
5			//it is known that spawning threads unstalls the system.
6	dashley	77	//-------------------------------------------------------------------------------------------------
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 <process.h>
29			#include <stdio.h>
30			#include <string.h>
31	dashley	78	#include <windows.h>
32	dashley	77
33	dashley	78	#define NELEM(A) (sizeof(A)/sizeof(A[0]))
34	dashley	77
35	dashley	78	void emit_hline_std(void)
36			{
37	dashley	85	printf("-------------------------------------------------------------------------------\n");
38	dashley	78	}
39
40			void emit_mit_license(void)
41			{
42			const char *ref[] =
43			{
44	dashley	85	"Permission is hereby granted, free of charge, to any person obtaining a copy",
45			"of this software and associated documentation files(the \"Software\"), to",
46			"deal in the Software without restriction, including without limitation the",
47			"rights to use, copy, modify, merge, publish, distribute, sublicense, and / or",
48			"sell copies of the Software, and to permit persons to whom the Software is",
49			"furnished to do so, subject to the following conditions :",
50	dashley	78	"",
51	dashley	85	"The above copyright notice and this permission notice shall be included in",
52			"all copies or substantial portions of the Software.",
53	dashley	78	"",
54			"THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR",
55			"IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,",
56			"FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE",
57			"AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER",
58			"LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,",
59			"OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE",
60			"SOFTWARE."
61			};
62
63			size_t i;
64
65			for (i=0; i<NELEM(ref); i++)
66			{
67			printf("%s\n", ref[i]);
68			}
69			}
70
71			const char *kickish_words[] =
72			{
73			"Kick",
74			"Smack",
75			"Slug",
76			"Punch",
77			"Assault",
78			"Hit",
79			"Strike",
80			"Slap",
81			"Smack",
82			"Spank",
83			"Cuff",
84			"Thump",
85			"Swat",
86			"Beat",
87			"Thrash",
88			"Batter",
89			"Pound",
90			"Pummel",
91			"Box",
92			"Whip",
93			"Flog",
94			"Cane",
95			"Wallop",
96			"Bash",
97			"Bop",
98			"Clout",
99			"Clip",
100			"Clobber",
101			"Sock",
102			"Swipe",
103			"Crown",
104			"Belt",
105			"Tan",
106			"Deck",
107			"Floor",
108			"Bump",
109			"Knock",
110			"Bang",
111			"Tap",
112			"Welt"
113			};
114
115			volatile int ctrl_c_or_break_pressed = 0; //volatile because the Visual C++ environment spawns a thread to handle
116			//CTRL-C or CTRL-BREAK.
117	dashley	79	volatile int thread_ran = 0; //volatile because shared with thread.
118	dashley	78
119			BOOL CtrlHandler(DWORD fdwCtrlType)
120			{
121			switch (fdwCtrlType)
122			{
123			case CTRL_C_EVENT:
124			case CTRL_BREAK_EVENT:
125			ctrl_c_or_break_pressed = 1;
126			return(TRUE);
127			//There is no default case. There is no break statement. I've assigned a
128			//magic number to a variable. But the function still works fine.
129			//Can you believe it? It must be a miracle!
130			}
131
132			return(FALSE); //Did I mention the multiple return points? This program should
133			//blow up and wipe out several city blocks!
134			}
135
136	dashley	79	//Thread function. Parameter ignored.
137			DWORD WINAPI MyThreadFunction(LPVOID lpParam)
138			{
139			thread_ran = 1;
140
141			return (0);
142			}
143
144	dashley	77	int c_main(int argc, char* argv[])
145	dashley	78	{
146			size_t selector = NELEM(kickish_words) - 1;
147			size_t ui;
148			int first_time = 1;
149	dashley	79	HANDLE thread_handle;
150			DWORD thread_id;
151	dashley	78
152			emit_hline_std();
153			printf("kicker, Copyright 2016 David T. Ashley (dashley@gmail.com)\n");
154			emit_hline_std();
155	dashley	85	printf("This program is made available under the MIT License, reproduced below.\n");
156	dashley	78	emit_hline_std();
157			emit_mit_license();
158			emit_hline_std();
159			printf("This program accepts no command-line arguments and simply spawns a new thread\n");
160			printf("approximately every 1 second. The purpose of the program is to prevent\n");
161			printf("certain stalls that occur under Windows when running some programs/scripts\n");
162			printf("It is known that spawning a new thread periodically unstalls the programs/\n");
163			printf("scripts. The program can be terminated with CTRL-C or CTRL-BREAK.\n");
164			emit_hline_std();
165
166			SetConsoleCtrlHandler((PHANDLER_ROUTINE)CtrlHandler, TRUE);
167			//Yes, I know I'm supposed to check the return code.
168
169			while (! ctrl_c_or_break_pressed)
170	dashley	77	{
171	dashley	78	//Backspace over the previous word.
172			if (! first_time)
173			{
174			//Beep(750, 500);
175
176			for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
177			{
178			printf("%c", (char)8);
179			}
180			for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
181			{
182			printf(" ");
183			}
184			for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++)
185			{
186			printf("%c", (char)8);
187			}
188			}
189
190			first_time = 0;
191
192			//Go to next string.
193			if (selector < (NELEM(kickish_words) - 1))
194			selector++;
195			else
196			selector = 0;
197
198			//Print the description.
199			printf("%s!", kickish_words[selector]);
200
201	dashley	79	//Start the thread. This will hopefully unstall things.
202			thread_handle = CreateThread(
203			NULL, // default security attributes
204			0, // use default stack size
205			MyThreadFunction, // thread function name
206			0, // argument to thread function
207			0, // use default creation flags
208			&thread_id); // returns the thread identifier
209
210			//If the create call failed, terminate.
211			if (thread_handle == NULL)
212			{
213			printf("\nOuch!\n");
214			exit(0);
215			}
216
217			//Wait for thread termination. This should be nearly instant. But it
218			//would seem to be the best way to wait so as not to chew up CPU
219			//cycles.
220			WaitForSingleObject(thread_handle, INFINITE);
221
222			//At this point, the thread should have run, and the variable should have been
223			//set. If not, there is a real logical problem.
224			if (!thread_ran)
225			{
226			printf("\nDouble-ouch\n");
227			exit(0);
228			}
229
230			thread_ran = 0;
231
232			//Delay. Sleep() is likely the most effective way to not waste CPU capacity.
233	dashley	78	Sleep(1000);
234	dashley	77	}
235
236	dashley	78	printf("\n");
237			emit_hline_std();
238			printf("Program terminated with CTRL-C or CTRL-BREAK.\n");
239			emit_hline_std();
240
241			return(0);
242			}
243
244	dashley	77	// End of c_main.c.