/[cvs]/joko/Uni/BSArch/04/bmp_fractal.c
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Diff of /joko/Uni/BSArch/04/bmp_fractal.c

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revision 1.16 by joko, Sun Jul 2 12:21:01 2006 UTC revision 1.18 by joko, Sun Jul 2 12:41:56 2006 UTC
# Line 15  Line 15 
15  #define YSIZE 500  #define YSIZE 500
16  #include "algorithm.h"  #include "algorithm.h"
17    
18    #define MAX_COMMAND_LINE 65536
19    #define MMAP_NAME "bmp_fractal"
20    
21  BOOL VERBOSE = FALSE;  BOOL VERBOSE = FALSE;
22    
23    
# Line 92  void write_blank_file(char *filename) { Line 95  void write_blank_file(char *filename) {
95    }    }
96        
97    // close file handle    // close file handle
98    fclose(fd);    if (fclose(fd) != 0) {
99        perror("Error while closing file handle");
100        exit(1);
101      }
102  }  }
103    
104    
# Line 115  DWORD WINAPI fractal_create_segment (LPV Line 121  DWORD WINAPI fractal_create_segment (LPV
121    int x, y;    int x, y;
122    char bgr[3];    char bgr[3];
123    
   thread_id = GetCurrentThreadId();  
     
124    // get worker arguments    // get worker arguments
125    args = (PWORKERARGS)lpParam;    args = (PWORKERARGS)lpParam;
126    
# Line 125  DWORD WINAPI fractal_create_segment (LPV Line 129  DWORD WINAPI fractal_create_segment (LPV
129    
130    // debugging    // debugging
131    if (VERBOSE) {    if (VERBOSE) {
132        thread_id = GetCurrentThreadId();
133      fprintf(stdout, "----------------------------------------------\n");      fprintf(stdout, "----------------------------------------------\n");
134      fprintf(stdout, "thread_id: %i\n", thread_id);      fprintf(stdout, "thread_id: %i\n", thread_id);
135      fprintf(stdout, "arg.start_row: %i\n", args->start_row);      fprintf(stdout, "arg.start_row: %i\n", args->start_row);
# Line 136  DWORD WINAPI fractal_create_segment (LPV Line 141  DWORD WINAPI fractal_create_segment (LPV
141    for (y = (args->start_row + args->number_of_rows) - 1; y >= args->start_row; y--) {    for (y = (args->start_row + args->number_of_rows) - 1; y >= args->start_row; y--) {
142      //fprintf(stdout, "calc: thread=%i; y=%i            limits: %i,%i    p: %p\n", thread_id, y, args->start_row, args->number_of_rows, pDataBitmapSegment);      //fprintf(stdout, "calc: thread=%i; y=%i            limits: %i,%i    p: %p\n", thread_id, y, args->start_row, args->number_of_rows, pDataBitmapSegment);
143      for (x = 0; x < XSIZE; x++) {      for (x = 0; x < XSIZE; x++) {
144          
145          // call to function in static linked library
146        getColorValuesAt(x * (2.0 / XSIZE) - 1.5, y * (2.0 / YSIZE) - 1.0, &bgr[2], &bgr[1], &bgr[0]);        getColorValuesAt(x * (2.0 / XSIZE) - 1.5, y * (2.0 / YSIZE) - 1.0, &bgr[2], &bgr[1], &bgr[0]);
147                
148        // transfer color values to current pixel        // transfer color values to current pixel
# Line 199  int main(int argc, char *argv[]) { Line 206  int main(int argc, char *argv[]) {
206    // information for creating processes    // information for creating processes
207    STARTUPINFO si;    STARTUPINFO si;
208    PROCESS_INFORMATION pi;    PROCESS_INFORMATION pi;
209    char szCmdline[65536];    char szCmdline[MAX_COMMAND_LINE];
210        
211    // command line stuff    // command line stuff
212    char arg_option[1024];    char arg_option[1024];
# Line 208  int main(int argc, char *argv[]) { Line 215  int main(int argc, char *argv[]) {
215    char *verbose_option = "";    char *verbose_option = "";
216        
217    
218    // parse command line arguments    // check command line arguments
219    if (argc < 2) {    if (argc < 2) {
220      fprintf(stderr, "Can not run without arguments!\nPlease specify '-t {number of threads}' or '-p {number of processes}' and an image filename.\n");      fprintf(stderr, "Error: Can not run without arguments!\nPlease specify '-t {number of threads}' or '-p {number of processes}' and an image filename.\n");
221      exit(EXIT_FAILURE);      exit(EXIT_FAILURE);
222    }    }
223    
224        
225      // parse command line arguments
226    if (scan_argv(argc, argv, "--verbose", arg_value)) {    if (scan_argv(argc, argv, "--verbose", arg_value)) {
227      VERBOSE = TRUE;      VERBOSE = TRUE;
228    }    }
# Line 224  int main(int argc, char *argv[]) { Line 233  int main(int argc, char *argv[]) {
233        
234    } else if (scan_argv(argc, argv, "-p", arg_value)) {    } else if (scan_argv(argc, argv, "-p", arg_value)) {
235      if (strlen(arg_value) == 0) {      if (strlen(arg_value) == 0) {
236        fprintf(stderr, "Please specify number of processes!\n");        fprintf(stderr, "Error: Please specify number of processes!\n");
237        exit(EXIT_FAILURE);        exit(EXIT_FAILURE);
238      }      }
239      use_processes = TRUE;      use_processes = TRUE;
# Line 232  int main(int argc, char *argv[]) { Line 241  int main(int argc, char *argv[]) {
241      workers = atoi(arg_value);      workers = atoi(arg_value);
242        
243    } else if (scan_argv(argc, argv, "-t", arg_value)) {    } else if (scan_argv(argc, argv, "-t", arg_value)) {
244      if (strlen(arg_value) == 0) {      
245        fprintf(stderr, "Please specify number of threads!\n");      if (strlen(arg_value) == 0)
246          fprintf(stderr, "Error: Please specify number of threads!\n"),
247        exit(EXIT_FAILURE);        exit(EXIT_FAILURE);
248      }      
249      use_processes = FALSE;      use_processes = FALSE;
250      is_worker_process = FALSE;      is_worker_process = FALSE;
251      workers = atoi(arg_value);      workers = atoi(arg_value);
252            
253    }    }
254      
255      if (!is_worker_process && workers < 1)
256        fprintf(stderr, "Error: Number of threads/processes must be >0!\n"),
257        exit(EXIT_FAILURE);
258        
259    if (VERBOSE && use_processes) {    if (VERBOSE && use_processes) {
260      fprintf(stdout, "===================================================== ");      fprintf(stdout, "===================================================== ");
# Line 256  int main(int argc, char *argv[]) { Line 269  int main(int argc, char *argv[]) {
269    if (!is_worker_process) {    if (!is_worker_process) {
270            
271      if (argc < 4) {      if (argc < 4) {
272        fprintf(stderr, "Must give filename of image as third argument!\n");        fprintf(stderr, "Error: Must give filename of image as third argument!\n");
273        exit(EXIT_FAILURE);        exit(EXIT_FAILURE);
274      }      }
275            
# Line 273  int main(int argc, char *argv[]) { Line 286  int main(int argc, char *argv[]) {
286      }      }
287    
288      // create the file mapping object      // create the file mapping object
289      hMap = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, "bmp_fractal");      hMap = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, MMAP_NAME);
290      if (NULL == hMap) {      if (NULL == hMap) {
291        printErrorAndExit("Error at CreateFileMapping", GetLastError());        printErrorAndExit("Error at CreateFileMapping", GetLastError());
292      }      }
# Line 282  int main(int argc, char *argv[]) { Line 295  int main(int argc, char *argv[]) {
295    } else {    } else {
296            
297      // open existing mapping object      // open existing mapping object
298      hMap = OpenFileMapping(FILE_MAP_WRITE, FALSE, "bmp_fractal");      hMap = OpenFileMapping(FILE_MAP_WRITE, FALSE, MMAP_NAME);
299      if (NULL == hMap)      if (NULL == hMap)
300        printErrorAndExit("Error at OpenFileMapping", GetLastError());        printErrorAndExit("Error at OpenFileMapping", GetLastError());
301    }    }
# Line 400  int main(int argc, char *argv[]) { Line 413  int main(int argc, char *argv[]) {
413    
414        if (VERBOSE)        if (VERBOSE)
415          verbose_option = "--verbose";          verbose_option = "--verbose";
416        _snprintf(szCmdline, 1023, "%s %s %i %i %s", argv[0], "--worker", worker_startrow, worker_rows, verbose_option);        _snprintf(szCmdline, MAX_COMMAND_LINE - 1, "%s %s %i %i %s", argv[0], "--worker", worker_startrow, worker_rows, verbose_option);
417        if (VERBOSE)        if (VERBOSE)
418          fprintf(stdout, "starting worker process: %s\n", szCmdline);          fprintf(stdout, "starting worker process: %s\n", szCmdline);
419          
420          // prepare data structures for CreateProcess
421        ZeroMemory( &si, sizeof(si) );        ZeroMemory( &si, sizeof(si) );
422        si.cb = sizeof(si);        si.cb = sizeof(si);
423        ZeroMemory( &pi, sizeof(pi) );        ZeroMemory( &pi, sizeof(pi) );
# Line 442  int main(int argc, char *argv[]) { Line 457  int main(int argc, char *argv[]) {
457    //  perror("WaitForSingleObject");    //  perror("WaitForSingleObject");
458    
459    // close all worker handles    // close all worker handles
460    for (worker_index = 0; worker_index < workers; worker_index++)    for (worker_index = 0; worker_index < workers; worker_index++) {
461      CloseHandle(worker_handles[worker_index]);      if (!CloseHandle(worker_handles[worker_index]))
462          printErrorAndExit("Error at CloseHandle for worker handles", GetLastError());
463      }
464            
465    // write the result into the file    // write the result into the file
466    if (!FlushViewOfFile(pData, 0)) {    if (!FlushViewOfFile(pData, 0))
467      err = GetLastError();      printErrorAndExit("Error at UnmapViewOfFile", GetLastError());
     printErrorAndExit("Error at UnmapViewOfFile", err);  
   }  
468    
469    // remove the mapped file    // remove the mapped file
470    if (!UnmapViewOfFile(pData)) {    if (!UnmapViewOfFile(pData))
471      err = GetLastError();      printErrorAndExit("Error at UnmapViewOfFile", GetLastError());
     printErrorAndExit("Error at UnmapViewOfFile", err);  
     exit(err);  
   }  
472        
473    // cleanup handles    // cleanup handles
474    if (!CloseHandle(hMap) || !CloseHandle(hFile) ) {    if (!CloseHandle(hMap) || !CloseHandle(hFile) )
475      err = GetLastError();      printErrorAndExit("Error at CloseHandle for memory mapped file", GetLastError());
     printErrorAndExit("Error at CloseHandle", err);  
   }  
476    
477    free(worker_args);    free(worker_args);
478    free(worker_handles);    free(worker_handles);
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