15 |
#define YSIZE 500 |
#define YSIZE 500 |
16 |
#include "algorithm.h" |
#include "algorithm.h" |
17 |
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18 |
#define MASTER -1 |
BOOL VERBOSE = FALSE; |
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BOOL VERBOSE = TRUE; |
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19 |
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20 |
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21 |
/* BMP Header */ |
/* BMP Header */ |
49 |
0, |
0, |
50 |
NULL )) |
NULL )) |
51 |
{ |
{ |
52 |
fprintf(stderr,"%s : %s\n",msg,lpMsgBuf); |
fprintf(stderr, "%s: %s\n", msg, lpMsgBuf); |
53 |
LocalFree(lpMsgBuf); |
LocalFree(lpMsgBuf); |
54 |
} |
} |
55 |
else |
else |
56 |
{ |
{ |
57 |
fprintf(stderr,"Error at FormatMesage: %d\n",err=GetLastError()); |
fprintf(stderr, "Error at FormatMesage: %d\n",err=GetLastError()); |
58 |
} |
} |
59 |
exit(err); |
exit(err); |
60 |
} |
} |
68 |
// open file handle |
// open file handle |
69 |
fd = fopen(filename, "wb+"); |
fd = fopen(filename, "wb+"); |
70 |
if (NULL == fd) { |
if (NULL == fd) { |
71 |
perror("open"); |
perror("Error while opening file for writing"); |
72 |
exit(1); |
exit(1); |
73 |
} |
} |
74 |
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77 |
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78 |
// error checking |
// error checking |
79 |
if (-1 == len || len != sizeof(header)) { |
if (-1 == len || len != sizeof(header)) { |
80 |
perror("write"); |
perror("Error while writing header to file"); |
81 |
exit(2); |
exit(2); |
82 |
} |
} |
83 |
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86 |
for (i = 0; i < img_size; i++) { |
for (i = 0; i < img_size; i++) { |
87 |
len = fwrite("\0\0\0", 1, 3, fd); |
len = fwrite("\0\0\0", 1, 3, fd); |
88 |
if (-1 == len || len != 3) { |
if (-1 == len || len != 3) { |
89 |
perror("write"); |
perror("Error while writing data to file"); |
90 |
exit(4); |
exit(4); |
91 |
} |
} |
92 |
} |
} |
125 |
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|
126 |
// debugging |
// debugging |
127 |
if (VERBOSE) { |
if (VERBOSE) { |
128 |
printf("----------------------------------------------\n"); |
fprintf(stdout, "----------------------------------------------\n"); |
129 |
printf("thread_id: %i\n", thread_id); |
fprintf(stdout, "thread_id: %i\n", thread_id); |
130 |
printf("arg.start_row: %i\n", args->start_row); |
fprintf(stdout, "arg.start_row: %i\n", args->start_row); |
131 |
printf("arg.number_of_rows: %i\n", args->number_of_rows); |
fprintf(stdout, "arg.number_of_rows: %i\n", args->number_of_rows); |
132 |
printf("segment_start: %p\n", pDataBitmapSegment); |
fprintf(stdout, "segment_start: %p\n", pDataBitmapSegment); |
133 |
} |
} |
134 |
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|
135 |
// calculate fractal |
// calculate fractal |
136 |
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--) { |
137 |
//printf("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); |
138 |
for (x = 0; x < XSIZE; x++) { |
for (x = 0; x < XSIZE; x++) { |
139 |
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]); |
140 |
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151 |
} |
} |
152 |
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153 |
if (VERBOSE) |
if (VERBOSE) |
154 |
printf("thread finished: %i\n", thread_id); |
fprintf(stdout, "thread finished: %i\n", thread_id); |
155 |
return 0; |
return 0; |
156 |
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157 |
} |
} |
158 |
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159 |
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//BOOL scan_argv(int argc, char *argv[], char opt_name[], char *opt_value[]) { |
160 |
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BOOL scan_argv(int argc, char *argv[], char opt_name[], char *opt_value) { |
161 |
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int i; |
162 |
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char * opt_current_name; |
163 |
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char * opt_current_value; |
164 |
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165 |
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//printf("searching for: '%s'\n", opt_name); |
166 |
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167 |
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for (i = 1; i < argc; i++) { |
168 |
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opt_current_name = argv[i]; |
169 |
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if (strcmp(opt_current_name, opt_name) == 0) { |
170 |
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opt_current_value = argv[i+1]; |
171 |
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if (opt_current_value != NULL) { |
172 |
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strcpy(opt_value, opt_current_value); |
173 |
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} |
174 |
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return TRUE; |
175 |
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} |
176 |
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} |
177 |
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return FALSE; |
178 |
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} |
179 |
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180 |
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181 |
int main(int argc, char *argv[]) { |
int main(int argc, char *argv[]) { |
182 |
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193 |
PWORKERARGS worker_args; |
PWORKERARGS worker_args; |
194 |
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195 |
// threads or processes? |
// threads or processes? |
196 |
BOOL use_processes = TRUE; |
BOOL use_processes = FALSE; |
197 |
int worker_id = MASTER; |
BOOL is_worker_process = FALSE; |
198 |
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199 |
// information for creating processes |
// information for creating processes |
200 |
STARTUPINFO si; |
STARTUPINFO si; |
201 |
PROCESS_INFORMATION pi; |
PROCESS_INFORMATION pi; |
202 |
char szCmdline[1024]; |
char szCmdline[65536]; |
203 |
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204 |
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// command line stuff |
205 |
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char arg_option[1024]; |
206 |
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char arg_value[1024]; |
207 |
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char *bmp_filename; |
208 |
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char *verbose_option = ""; |
209 |
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210 |
// "parse" command line arguments |
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211 |
if (argc >= 2) { |
// parse command line arguments |
212 |
worker_id = atoi(argv[1]); |
if (argc < 2) { |
213 |
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fprintf(stderr, "Can not run without arguments!\nPlease specify '-t {number of threads}' or '-p {number of processes}' and an image filename.\n"); |
214 |
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exit(EXIT_FAILURE); |
215 |
} |
} |
216 |
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217 |
if (VERBOSE) { |
if (scan_argv(argc, argv, "--verbose", arg_value)) { |
218 |
printf("==============================================================\n"); |
VERBOSE = TRUE; |
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printf("worker-id: %i\n", worker_id); |
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219 |
} |
} |
220 |
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221 |
// create empty bmp-file (black background) |
if (scan_argv(argc, argv, "--worker", arg_value)) { |
222 |
if (worker_id == MASTER) |
use_processes = TRUE; |
223 |
write_blank_file("test.bmp"); |
is_worker_process = TRUE; |
224 |
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225 |
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} else if (scan_argv(argc, argv, "-p", arg_value)) { |
226 |
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if (strlen(arg_value) == 0) { |
227 |
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fprintf(stderr, "Please specify number of processes!\n"); |
228 |
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exit(EXIT_FAILURE); |
229 |
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} |
230 |
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use_processes = TRUE; |
231 |
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is_worker_process = FALSE; |
232 |
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workers = atoi(arg_value); |
233 |
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234 |
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} else if (scan_argv(argc, argv, "-t", arg_value)) { |
235 |
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if (strlen(arg_value) == 0) { |
236 |
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fprintf(stderr, "Please specify number of threads!\n"); |
237 |
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exit(EXIT_FAILURE); |
238 |
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} |
239 |
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use_processes = FALSE; |
240 |
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is_worker_process = FALSE; |
241 |
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workers = atoi(arg_value); |
242 |
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243 |
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} |
244 |
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245 |
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246 |
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if (VERBOSE && use_processes) { |
247 |
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fprintf(stdout, "===================================================== "); |
248 |
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if (is_worker_process) |
249 |
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fprintf(stdout, "WORKER-PROCESS\n"); |
250 |
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else |
251 |
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fprintf(stdout, "MASTER-PROCESS\n"); |
252 |
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} |
253 |
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254 |
if (worker_id == MASTER) { |
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255 |
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// master creates memory mapped file ("empty" image) |
256 |
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if (!is_worker_process) { |
257 |
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258 |
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if (argc < 4) { |
259 |
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fprintf(stderr, "Must give filename of image as third argument!\n"); |
260 |
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exit(EXIT_FAILURE); |
261 |
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} |
262 |
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263 |
/* open file for reading and writing */ |
bmp_filename = argv[3]; |
264 |
hFile = CreateFile("test.bmp", GENERIC_WRITE|GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); |
|
265 |
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// create empty bmp-file (black background) |
266 |
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write_blank_file(bmp_filename); |
267 |
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268 |
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// open file for reading and writing |
269 |
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hFile = CreateFile(bmp_filename, GENERIC_WRITE|GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); |
270 |
if (INVALID_HANDLE_VALUE == hFile) { |
if (INVALID_HANDLE_VALUE == hFile) { |
271 |
err = GetLastError(); |
err = GetLastError(); |
272 |
printErrorAndExit("Error at CreateFile",err); |
printErrorAndExit("Error at CreateFile",err); |
273 |
} |
} |
274 |
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|
275 |
/* create the file mapping object */ |
// create the file mapping object |
276 |
hMap = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, "bmp_fractal"); |
hMap = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, "bmp_fractal"); |
277 |
if (NULL == hMap) { |
if (NULL == hMap) { |
278 |
printErrorAndExit("Error at CreateFileMapping", GetLastError()); |
printErrorAndExit("Error at CreateFileMapping", GetLastError()); |
279 |
} |
} |
280 |
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281 |
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// worker uses existing memory mapped file |
282 |
} else { |
} else { |
283 |
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|
284 |
// open existing mapping object |
// open existing mapping object |
287 |
printErrorAndExit("Error at OpenFileMapping", GetLastError()); |
printErrorAndExit("Error at OpenFileMapping", GetLastError()); |
288 |
} |
} |
289 |
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|
290 |
/* map the whole file into the process context */ |
// map the whole file into the process context |
291 |
pData = MapViewOfFile(hMap, FILE_MAP_WRITE, 0, 0, 0); |
pData = MapViewOfFile(hMap, FILE_MAP_WRITE, 0, 0, 0); |
292 |
if (NULL == pData) { |
if (NULL == pData) { |
293 |
printErrorAndExit("Error at MapViewOfFile", GetLastError()); |
printErrorAndExit("Error at MapViewOfFile", GetLastError()); |
299 |
|
|
300 |
// debugging |
// debugging |
301 |
if (VERBOSE) { |
if (VERBOSE) { |
302 |
printf("pos. of file: %p\n", pData); |
fprintf(stdout, "pos. of file: %p\n", pData); |
303 |
printf("pos. of bitmap: %p\n", pDataBitmap); |
fprintf(stdout, "pos. of bitmap: %p\n", pDataBitmap); |
304 |
} |
} |
305 |
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|
306 |
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|
307 |
if (use_processes && worker_id != MASTER) { |
if (use_processes && is_worker_process) { |
308 |
|
|
309 |
if (VERBOSE) |
if (VERBOSE) |
310 |
printf("inside worker-process\n"); |
fprintf(stdout, "inside worker-process\n"); |
|
|
|
|
worker_index = worker_id; |
|
311 |
|
|
312 |
|
// get segment information from command line |
313 |
worker_startrow = atoi(argv[2]); |
worker_startrow = atoi(argv[2]); |
314 |
worker_rows = atoi(argv[3]); |
worker_rows = atoi(argv[3]); |
315 |
|
|
316 |
// allocate memory for one worker's arguments |
// allocate memory for one worker's arguments |
317 |
if ((worker_args = malloc(sizeof(worker_args[0]))) == NULL) |
if ((worker_args = malloc(sizeof(worker_args[0]))) == NULL) |
318 |
perror("malloc"), exit(1); |
perror("Error while allocating memory for worker arguments via malloc"), exit(1); |
319 |
|
|
320 |
// assign worker's arguments |
// assign worker's arguments |
321 |
worker_args[0].start_row = worker_startrow; |
worker_args[0].start_row = worker_startrow; |
323 |
worker_args[0].pBitmap = pDataBitmap; |
worker_args[0].pBitmap = pDataBitmap; |
324 |
|
|
325 |
fractal_create_segment(&worker_args[0]); |
fractal_create_segment(&worker_args[0]); |
326 |
|
|
327 |
|
// cleanup mmap-handle |
328 |
|
if (!CloseHandle(hMap)) |
329 |
|
printErrorAndExit("Error at CloseHandle", GetLastError()); |
330 |
|
|
331 |
return 0; |
return 0; |
332 |
} |
} |
333 |
|
|
334 |
/* |
/* |
348 |
|
|
349 |
// allocate memory for table of all worker handles |
// allocate memory for table of all worker handles |
350 |
if ((worker_handles = malloc(workers * sizeof(worker_handles[0]))) == NULL) |
if ((worker_handles = malloc(workers * sizeof(worker_handles[0]))) == NULL) |
351 |
perror("malloc"), exit(1); |
perror("Error while allocating memory for worker handles via malloc"), exit(1); |
352 |
|
|
353 |
// allocate memory for table of all worker arguments |
// allocate memory for table of all worker arguments |
354 |
if ((worker_args = malloc(workers * sizeof(worker_args[0]))) == NULL) |
if ((worker_args = malloc(workers * sizeof(worker_args[0]))) == NULL) |
355 |
perror("malloc"), exit(1); |
perror("Error while allocating memory for worker arguments via malloc"), exit(1); |
356 |
|
|
357 |
|
|
358 |
// calculate bitmap segment length for workers |
// calculate bitmap segment length for workers |
359 |
worker_rows = YSIZE / workers; |
worker_rows = YSIZE / workers; |
360 |
if (VERBOSE) |
if (VERBOSE) |
361 |
printf("rows for each worker: %i\n", worker_rows); |
fprintf(stdout, "rows for each worker: %i\n", worker_rows); |
362 |
|
|
363 |
// start workers |
// start workers |
364 |
for (worker_index = 0; worker_index < workers; worker_index++) { |
for (worker_index = 0; worker_index < workers; worker_index++) { |
374 |
if (worker_index == workers - 1) { |
if (worker_index == workers - 1) { |
375 |
worker_rows = YSIZE - worker_startrow; |
worker_rows = YSIZE - worker_startrow; |
376 |
if (VERBOSE) |
if (VERBOSE) |
377 |
printf("rows for last worker: %i\n", worker_rows); |
fprintf(stdout, "rows for last worker: %i\n", worker_rows); |
378 |
} |
} |
379 |
|
|
380 |
// assign each worker's arguments |
// assign each worker's arguments |
398 |
|
|
399 |
} else { |
} else { |
400 |
|
|
401 |
_snprintf(szCmdline, 1023, "%s %i %i %i", argv[0], worker_index + 1, worker_startrow, worker_rows); |
if (VERBOSE) |
402 |
|
verbose_option = "--verbose"; |
403 |
|
_snprintf(szCmdline, 1023, "%s %s %i %i %s", argv[0], "--worker", worker_startrow, worker_rows, verbose_option); |
404 |
|
if (VERBOSE) |
405 |
|
fprintf(stdout, "starting worker process: %s\n", szCmdline); |
406 |
ZeroMemory( &si, sizeof(si) ); |
ZeroMemory( &si, sizeof(si) ); |
407 |
si.cb = sizeof(si); |
si.cb = sizeof(si); |
408 |
ZeroMemory( &pi, sizeof(pi) ); |
ZeroMemory( &pi, sizeof(pi) ); |
429 |
|
|
430 |
// wait for all threads |
// wait for all threads |
431 |
if (VERBOSE) |
if (VERBOSE) |
432 |
printf("waiting for workers to finish...\n"); |
fprintf(stdout, "waiting for workers to finish...\n"); |
433 |
if (WaitForMultipleObjects(workers, worker_handles, TRUE, INFINITE) == WAIT_FAILED) |
if (WaitForMultipleObjects(workers, worker_handles, TRUE, INFINITE) == WAIT_FAILED) |
434 |
perror("WaitForMultipleObjects"); |
printErrorAndExit("Error at WaitForMultipleObjects", GetLastError()); |
435 |
|
|
436 |
// debugging: just run single thread |
// debugging: just run single thread |
437 |
//if (WaitForSingleObject(worker_handles[0], INFINITE) == WAIT_FAILED) |
//if (WaitForSingleObject(worker_handles[0], INFINITE) == WAIT_FAILED) |
441 |
for (worker_index = 0; worker_index < workers; worker_index++) |
for (worker_index = 0; worker_index < workers; worker_index++) |
442 |
CloseHandle(worker_handles[worker_index]); |
CloseHandle(worker_handles[worker_index]); |
443 |
|
|
444 |
/* write the result into the file */ |
// write the result into the file |
445 |
if (!FlushViewOfFile(pData, 0)) { |
if (!FlushViewOfFile(pData, 0)) { |
446 |
err = GetLastError(); |
err = GetLastError(); |
447 |
printErrorAndExit("Error at UnmapViewOfFile", err); |
printErrorAndExit("Error at UnmapViewOfFile", err); |
448 |
} |
} |
449 |
|
|
450 |
/* remove the mapped file */ |
// remove the mapped file |
451 |
if (!UnmapViewOfFile(pData)) { |
if (!UnmapViewOfFile(pData)) { |
452 |
err = GetLastError(); |
err = GetLastError(); |
453 |
printErrorAndExit("Error at UnmapViewOfFile", err); |
printErrorAndExit("Error at UnmapViewOfFile", err); |
454 |
exit(err); |
exit(err); |
455 |
} |
} |
456 |
|
|
457 |
/* cleanup handles */ |
// cleanup handles |
458 |
if (!CloseHandle(hMap) || !CloseHandle(hFile) ) { |
if (!CloseHandle(hMap) || !CloseHandle(hFile) ) { |
459 |
err = GetLastError(); |
err = GetLastError(); |
460 |
printErrorAndExit("Error at CloseHandle", err); |
printErrorAndExit("Error at CloseHandle", err); |