49 |
0, |
0, |
50 |
NULL )) |
NULL )) |
51 |
{ |
{ |
52 |
fprintf(stdout, "%s: %s\n", msg, lpMsgBuf); |
fprintf(stderr, "%s: %s\n", msg, lpMsgBuf); |
53 |
LocalFree(lpMsgBuf); |
LocalFree(lpMsgBuf); |
54 |
} |
} |
55 |
else |
else |
56 |
{ |
{ |
57 |
fprintf(stdout, "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 |
|
|
77 |
|
|
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 |
|
|
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 |
} |
} |
156 |
|
|
157 |
} |
} |
158 |
|
|
159 |
|
BOOL scan_argv(int argc, char *argv[], char opt_name[], char *opt_value) { |
160 |
|
int i; |
161 |
|
char * opt_current_name; |
162 |
|
char * opt_current_value; |
163 |
|
|
164 |
|
//printf("searching for: '%s'\n", opt_name); |
165 |
|
|
166 |
|
for (i = 1; i < argc; i++) { |
167 |
|
opt_current_name = argv[i]; |
168 |
|
if (strcmp(opt_current_name, opt_name) == 0) { |
169 |
|
opt_current_value = argv[i+1]; |
170 |
|
if (opt_current_value != NULL) { |
171 |
|
strcpy(opt_value, opt_current_value); |
172 |
|
} |
173 |
|
return TRUE; |
174 |
|
} |
175 |
|
} |
176 |
|
return FALSE; |
177 |
|
} |
178 |
|
|
179 |
|
|
180 |
int main(int argc, char *argv[]) { |
int main(int argc, char *argv[]) { |
181 |
|
|
186 |
unsigned char *pDataBitmap; |
unsigned char *pDataBitmap; |
187 |
|
|
188 |
// workers |
// workers |
189 |
int workers = 5; |
int workers; |
190 |
int worker_index, worker_rows, worker_startrow; |
int worker_index, worker_rows, worker_startrow; |
191 |
HANDLE *worker_handles; |
HANDLE *worker_handles; |
192 |
PWORKERARGS worker_args; |
PWORKERARGS worker_args; |
193 |
|
int worker_count; |
194 |
|
|
195 |
// threads or processes? |
// threads or processes? |
196 |
BOOL use_processes = TRUE; |
BOOL use_processes = FALSE; |
197 |
BOOL is_worker_process = FALSE; |
BOOL is_worker_process = FALSE; |
198 |
|
|
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 |
|
|
204 |
|
// command line stuff |
205 |
|
char arg_option[1024]; |
206 |
|
char arg_value[1024]; |
207 |
|
char *bmp_filename; |
208 |
|
char *verbose_option = ""; |
209 |
|
|
210 |
|
|
211 |
|
// parse command line arguments |
212 |
|
if (argc < 2) { |
213 |
|
fprintf(stderr, "Can not run without arguments!\nPlease specify '-t {number of threads}' or '-p {number of processes}' and an image filename.\n"); |
214 |
|
exit(EXIT_FAILURE); |
215 |
|
} |
216 |
|
|
217 |
|
if (scan_argv(argc, argv, "--verbose", arg_value)) { |
218 |
|
VERBOSE = TRUE; |
219 |
|
} |
220 |
|
|
221 |
VERBOSE = TRUE; |
if (scan_argv(argc, argv, "--worker", arg_value)) { |
222 |
|
use_processes = TRUE; |
223 |
|
is_worker_process = TRUE; |
224 |
|
|
225 |
// "parse" command line arguments |
} else if (scan_argv(argc, argv, "-p", arg_value)) { |
226 |
if (argc >= 2) { |
if (strlen(arg_value) == 0) { |
227 |
if (strcmp(argv[1], "--worker") == 0) { |
fprintf(stderr, "Please specify number of processes!\n"); |
228 |
is_worker_process = TRUE; |
exit(EXIT_FAILURE); |
229 |
} |
} |
230 |
|
use_processes = TRUE; |
231 |
|
is_worker_process = FALSE; |
232 |
|
workers = atoi(arg_value); |
233 |
|
|
234 |
|
} else if (scan_argv(argc, argv, "-t", arg_value)) { |
235 |
|
if (strlen(arg_value) == 0) { |
236 |
|
fprintf(stderr, "Please specify number of threads!\n"); |
237 |
|
exit(EXIT_FAILURE); |
238 |
|
} |
239 |
|
use_processes = FALSE; |
240 |
|
is_worker_process = FALSE; |
241 |
|
workers = atoi(arg_value); |
242 |
|
|
243 |
} |
} |
244 |
|
|
245 |
|
|
246 |
if (VERBOSE && use_processes) { |
if (VERBOSE && use_processes) { |
247 |
fprintf(stdout, "===================================================== "); |
fprintf(stdout, "===================================================== "); |
248 |
if (is_worker_process) |
if (is_worker_process) |
250 |
else |
else |
251 |
fprintf(stdout, "MASTER-PROCESS\n"); |
fprintf(stdout, "MASTER-PROCESS\n"); |
252 |
} |
} |
|
|
|
|
// create empty bmp-file (black background) |
|
|
if (!is_worker_process) |
|
|
write_blank_file("test.bmp"); |
|
253 |
|
|
254 |
// master creates memory mapped file |
|
255 |
|
// master creates memory mapped file ("empty" image) |
256 |
if (!is_worker_process) { |
if (!is_worker_process) { |
257 |
|
|
258 |
|
if (argc < 4) { |
259 |
|
fprintf(stderr, "Must give filename of image as third argument!\n"); |
260 |
|
exit(EXIT_FAILURE); |
261 |
|
} |
262 |
|
|
263 |
|
bmp_filename = argv[3]; |
264 |
|
|
265 |
|
// create empty bmp-file (black background) |
266 |
|
write_blank_file(bmp_filename); |
267 |
|
|
268 |
// open file for reading and writing |
// open file for reading and writing |
269 |
hFile = CreateFile("test.bmp", GENERIC_WRITE|GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); |
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); |
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; |
328 |
if (!CloseHandle(hMap)) |
if (!CloseHandle(hMap)) |
329 |
printErrorAndExit("Error at CloseHandle", GetLastError()); |
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 |
398 |
|
|
399 |
} else { |
} else { |
400 |
|
|
401 |
_snprintf(szCmdline, 1023, "%s %s %i %i", argv[0], "--worker", 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) |
if (VERBOSE) |
405 |
fprintf(stdout, "starting worker process: %s\n", szCmdline); |
fprintf(stdout, "starting worker process: %s\n", szCmdline); |
406 |
ZeroMemory( &si, sizeof(si) ); |
ZeroMemory( &si, sizeof(si) ); |
427 |
|
|
428 |
} |
} |
429 |
|
|
|
// wait for all threads |
|
430 |
if (VERBOSE) |
if (VERBOSE) |
431 |
fprintf(stdout, "waiting for workers to finish...\n"); |
fprintf(stdout, "waiting for workers to finish...\n"); |
432 |
if (WaitForMultipleObjects(workers, worker_handles, TRUE, INFINITE) == WAIT_FAILED) |
|
433 |
perror("WaitForMultipleObjects"); |
// wait for all workers |
434 |
|
for (worker_index = 0; worker_index < workers; worker_index += MAXIMUM_WAIT_OBJECTS) { |
435 |
|
worker_count = ((workers - worker_index) > MAXIMUM_WAIT_OBJECTS) ? MAXIMUM_WAIT_OBJECTS : (workers - worker_index); |
436 |
|
if (WaitForMultipleObjects(worker_count, &worker_handles[worker_index], TRUE, INFINITE) == WAIT_FAILED) |
437 |
|
printErrorAndExit("Error at WaitForMultipleObjects", GetLastError()); |
438 |
|
} |
439 |
|
|
440 |
// debugging: just run single thread |
// debugging: just run single thread |
441 |
//if (WaitForSingleObject(worker_handles[0], INFINITE) == WAIT_FAILED) |
//if (WaitForSingleObject(worker_handles[0], INFINITE) == WAIT_FAILED) |