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//$Header$ |
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//------------------------------------------------------------------------------------------------- |
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//This file is part of "kicker", a program for spawning threads periodically in order to |
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//unstall certain Windows programs and scripts. The cause of the stall is unknown, but |
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//it is known that spawning threads unstalls the system. |
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//------------------------------------------------------------------------------------------------- |
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//This source code and any program in which it is compiled/used is provided under the MIT License, |
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//reproduced below. |
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//------------------------------------------------------------------------------------------------- |
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//Permission is hereby granted, free of charge, to any person obtaining a copy of |
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//this software and associated documentation files(the "Software"), to deal in the |
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//Software without restriction, including without limitation the rights to use, |
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//copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the |
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//Software, and to permit persons to whom the Software is furnished to do so, |
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//subject to the following conditions : |
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// |
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//The above copyright notice and this permission notice shall be included in all |
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//copies or substantial portions of the Software. |
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// |
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//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE |
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//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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//SOFTWARE. |
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//------------------------------------------------------------------------------------------------- |
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#include <process.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <windows.h> |
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|
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#define NELEM(A) (sizeof(A)/sizeof(A[0])) |
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|
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void emit_hline_std(void) |
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{ |
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printf("-------------------------------------------------------------------------------\n"); |
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} |
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|
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void emit_mit_license(void) |
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{ |
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const char *ref[] = |
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{ |
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"Permission is hereby granted, free of charge, to any person obtaining a copy", |
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"of this software and associated documentation files (the \"Software\"), to", |
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"deal in the Software without restriction, including without limitation the", |
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"rights to use, copy, modify, merge, publish, distribute, sublicense, and / or", |
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"sell copies of the Software, and to permit persons to whom the Software is", |
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"furnished to do so, subject to the following conditions :", |
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"", |
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"The above copyright notice and this permission notice shall be included in", |
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"all copies or substantial portions of the Software.", |
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"", |
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"THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR", |
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"IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,", |
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"FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE", |
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"AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER", |
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"LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,", |
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"OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE", |
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"SOFTWARE." |
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}; |
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|
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size_t i; |
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|
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for (i=0; i<NELEM(ref); i++) |
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{ |
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printf("%s\n", ref[i]); |
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} |
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} |
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|
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const char *kickish_words[] = |
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{ |
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"Kick", |
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"Smack", |
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"Slug", |
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"Punch", |
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"Assault", |
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"Hit", |
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"Strike", |
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"Slap", |
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"Smack", |
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"Spank", |
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"Cuff", |
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"Thump", |
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"Swat", |
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"Beat", |
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"Thrash", |
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"Batter", |
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"Pound", |
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"Pummel", |
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"Box", |
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"Whip", |
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"Flog", |
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"Cane", |
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"Wallop", |
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"Bash", |
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"Bop", |
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"Clout", |
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"Clip", |
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"Clobber", |
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"Sock", |
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"Swipe", |
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"Crown", |
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"Belt", |
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"Tan", |
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"Deck", |
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"Floor", |
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"Bump", |
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"Knock", |
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"Bang", |
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"Tap", |
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"Welt" |
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}; |
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|
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volatile int ctrl_c_or_break_pressed = 0; //volatile because the Visual C++ environment spawns a thread to handle |
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//CTRL-C or CTRL-BREAK. |
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volatile int thread_ran = 0; //volatile because shared with thread. |
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|
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BOOL CtrlHandler(DWORD fdwCtrlType) |
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{ |
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switch (fdwCtrlType) |
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{ |
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case CTRL_C_EVENT: |
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case CTRL_BREAK_EVENT: |
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ctrl_c_or_break_pressed = 1; |
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return(TRUE); |
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//There is no default case. There is no break statement. I've assigned a |
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//magic number to a variable. But the function still works fine. |
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//Can you believe it? It must be a miracle! |
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} |
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|
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return(FALSE); //Did I mention the multiple return points? This program should |
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//blow up and wipe out several city blocks! |
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} |
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|
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//Thread function. Parameter ignored. |
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DWORD WINAPI MyThreadFunction(LPVOID lpParam) |
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{ |
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thread_ran = 1; |
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|
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return (0); |
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} |
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|
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int c_main(int argc, char* argv[]) |
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{ |
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size_t selector = NELEM(kickish_words) - 1; |
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size_t ui; |
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int first_time = 1; |
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HANDLE thread_handle; |
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DWORD thread_id; |
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|
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emit_hline_std(); |
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printf("kicker, Copyright 2016 David T. Ashley (dashley@gmail.com)\n"); |
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emit_hline_std(); |
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printf("This program is made available under the MIT License, reproduced below.\n"); |
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emit_hline_std(); |
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emit_mit_license(); |
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emit_hline_std(); |
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printf("This program accepts no command-line arguments and simply spawns a new thread\n"); |
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printf("approximately every 1 second. The purpose of the program is to prevent\n"); |
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printf("certain stalls that occur under Windows when running some programs/scripts\n"); |
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printf("It is known that spawning a new thread periodically unstalls the programs/\n"); |
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printf("scripts. The program can be terminated with CTRL-C or CTRL-BREAK.\n"); |
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emit_hline_std(); |
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|
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SetConsoleCtrlHandler((PHANDLER_ROUTINE)CtrlHandler, TRUE); |
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//Yes, I know I'm supposed to check the return code. |
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|
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while (! ctrl_c_or_break_pressed) |
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{ |
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//Backspace over the previous word. |
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if (! first_time) |
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{ |
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//Beep(750, 500); |
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for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++) |
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{ |
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printf("%c", (char)8); |
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} |
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for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++) |
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{ |
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printf(" "); |
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} |
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for (ui = 0; ui < (strlen(kickish_words[selector]) + 1); ui++) |
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{ |
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printf("%c", (char)8); |
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} |
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} |
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|
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first_time = 0; |
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|
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//Go to next string. |
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if (selector < (NELEM(kickish_words) - 1)) |
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selector++; |
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else |
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selector = 0; |
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|
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//Print the description. |
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printf("%s!", kickish_words[selector]); |
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|
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//Start the thread. This will hopefully unstall things. |
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thread_handle = CreateThread( |
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NULL, // default security attributes |
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0, // use default stack size |
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MyThreadFunction, // thread function name |
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0, // argument to thread function |
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0, // use default creation flags |
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&thread_id); // returns the thread identifier |
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|
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//If the create call failed, terminate. |
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if (thread_handle == NULL) |
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{ |
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printf("\nOuch!\n"); |
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exit(0); |
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} |
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|
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//Wait for thread termination. This should be nearly instant. But it |
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//would seem to be the best way to wait so as not to chew up CPU |
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//cycles. |
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WaitForSingleObject(thread_handle, INFINITE); |
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|
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//At this point, the thread should have run, and the variable should have been |
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//set. If not, there is a real logical problem. |
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if (!thread_ran) |
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{ |
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printf("\nDouble-ouch\n"); |
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exit(0); |
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} |
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|
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thread_ran = 0; |
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|
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//Delay. Sleep() is likely the most effective way to not waste CPU capacity. |
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Sleep(1000); |
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} |
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|
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printf("\n"); |
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emit_hline_std(); |
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printf("Program terminated with CTRL-C or CTRL-BREAK.\n"); |
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emit_hline_std(); |
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|
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return(0); |
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} |
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|
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// End of c_main.c. |