15 |
#define YSIZE 500 |
#define YSIZE 500 |
16 |
#include "algorithm.h" |
#include "algorithm.h" |
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18 |
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#define VERBOSE_HANDLE "stderr"; |
19 |
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20 |
BOOL VERBOSE = FALSE; |
BOOL VERBOSE = FALSE; |
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22 |
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51 |
0, |
0, |
52 |
NULL )) |
NULL )) |
53 |
{ |
{ |
54 |
fprintf(stderr,"%s : %s\n",msg,lpMsgBuf); |
fprintf(stdout, "%s: %s\n", msg, lpMsgBuf); |
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LocalFree(lpMsgBuf); |
LocalFree(lpMsgBuf); |
56 |
} |
} |
57 |
else |
else |
58 |
{ |
{ |
59 |
fprintf(stderr,"Error at FormatMesage: %d\n",err=GetLastError()); |
fprintf(stdout, "Error at FormatMesage: %d\n",err=GetLastError()); |
60 |
} |
} |
61 |
exit(err); |
exit(err); |
62 |
} |
} |
106 |
} WORKERARGS, *PWORKERARGS; |
} WORKERARGS, *PWORKERARGS; |
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// worker thread - main entry function |
// worker thread - main entry function |
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DWORD WINAPI fractal_thread (LPVOID lpParam) { |
DWORD WINAPI fractal_create_segment (LPVOID lpParam) { |
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111 |
// thread stuff |
// thread stuff |
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int thread_id; |
int thread_id; |
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// debugging |
// debugging |
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if (VERBOSE) { |
if (VERBOSE) { |
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printf("----------------------------------------------\n"); |
fprintf(stdout, "----------------------------------------------\n"); |
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printf("thread_id: %i\n", thread_id); |
fprintf(stdout, "thread_id: %i\n", thread_id); |
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printf("arg.start_row: %i\n", args->start_row); |
fprintf(stdout, "arg.start_row: %i\n", args->start_row); |
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printf("arg.number_of_rows: %i\n", args->number_of_rows); |
fprintf(stdout, "arg.number_of_rows: %i\n", args->number_of_rows); |
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printf("segment_start: %p\n", pDataBitmapSegment); |
fprintf(stdout, "segment_start: %p\n", pDataBitmapSegment); |
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} |
} |
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// calculate fractal |
// calculate fractal |
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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--) { |
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//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); |
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for (x = 0; x < XSIZE; x++) { |
for (x = 0; x < XSIZE; x++) { |
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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]); |
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} |
} |
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if (VERBOSE) |
if (VERBOSE) |
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printf("thread finished: %i\n", thread_id); |
fprintf(stdout, "thread finished: %i\n", thread_id); |
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return 0; |
return 0; |
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} |
} |
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unsigned char *pDataBitmap; |
unsigned char *pDataBitmap; |
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// workers |
// workers |
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int workers = 50; |
int workers = 5; |
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int worker_index, worker_rows, worker_startrow; |
int worker_index, worker_rows, worker_startrow; |
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HANDLE *worker_handles; |
HANDLE *worker_handles; |
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PWORKERARGS worker_args; |
PWORKERARGS worker_args; |
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// threads or processes? |
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BOOL use_processes = TRUE; |
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BOOL is_worker = FALSE; |
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// information for creating processes |
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STARTUPINFO si; |
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PROCESS_INFORMATION pi; |
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char szCmdline[1024]; |
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VERBOSE = TRUE; |
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// "parse" command line arguments |
189 |
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if (argc >= 2) { |
190 |
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if (strcmp(argv[1], "--worker") == 0) { |
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is_worker = TRUE; |
192 |
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} |
193 |
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} |
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if (VERBOSE && use_processes) { |
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fprintf(stdout, "===================================================== "); |
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if (is_worker) |
198 |
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fprintf(stdout, "WORKER-PROCESS\n"); |
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else |
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fprintf(stdout, "MASTER-PROCESS\n"); |
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} |
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// create empty bmp-file (black background) |
// create empty bmp-file (black background) |
204 |
write_blank_file("test.bmp"); |
if (!is_worker) |
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write_blank_file("test.bmp"); |
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/* open file for reading and writing */ |
if (!is_worker) { |
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hFile = CreateFile("test.bmp", GENERIC_WRITE|GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); |
|
209 |
if (INVALID_HANDLE_VALUE == hFile) { |
/* open file for reading and writing */ |
210 |
err = GetLastError(); |
hFile = CreateFile("test.bmp", GENERIC_WRITE|GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); |
211 |
printErrorAndExit("Error at CreateFile",err); |
if (INVALID_HANDLE_VALUE == hFile) { |
212 |
} |
err = GetLastError(); |
213 |
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printErrorAndExit("Error at CreateFile",err); |
214 |
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} |
215 |
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216 |
/* create the file mapping object */ |
/* create the file mapping object */ |
217 |
hMap = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, NULL); |
hMap = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, "bmp_fractal"); |
218 |
if (NULL == hMap) { |
if (NULL == hMap) { |
219 |
printErrorAndExit("Error at CreateFileMapping", GetLastError()); |
printErrorAndExit("Error at CreateFileMapping", GetLastError()); |
220 |
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} |
221 |
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222 |
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} else { |
223 |
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224 |
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// open existing mapping object |
225 |
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hMap = OpenFileMapping(FILE_MAP_WRITE, FALSE, "bmp_fractal"); |
226 |
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if (NULL == hMap) |
227 |
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printErrorAndExit("Error at OpenFileMapping", GetLastError()); |
228 |
} |
} |
229 |
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/* map the whole file into the process context */ |
/* map the whole file into the process context */ |
239 |
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240 |
// debugging |
// debugging |
241 |
if (VERBOSE) { |
if (VERBOSE) { |
242 |
printf("pos. of file: %p\n", pData); |
fprintf(stdout, "pos. of file: %p\n", pData); |
243 |
printf("pos. of bitmap: %p\n", pDataBitmap); |
fprintf(stdout, "pos. of bitmap: %p\n", pDataBitmap); |
244 |
} |
} |
245 |
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246 |
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247 |
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if (use_processes && is_worker) { |
248 |
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249 |
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if (VERBOSE) |
250 |
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fprintf(stdout, "inside worker-process\n"); |
251 |
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252 |
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// get segment information from command line |
253 |
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worker_startrow = atoi(argv[2]); |
254 |
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worker_rows = atoi(argv[3]); |
255 |
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256 |
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// allocate memory for one worker's arguments |
257 |
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if ((worker_args = malloc(sizeof(worker_args[0]))) == NULL) |
258 |
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perror("malloc"), exit(1); |
259 |
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260 |
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// assign worker's arguments |
261 |
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worker_args[0].start_row = worker_startrow; |
262 |
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worker_args[0].number_of_rows = worker_rows; |
263 |
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worker_args[0].pBitmap = pDataBitmap; |
264 |
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265 |
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fractal_create_segment(&worker_args[0]); |
266 |
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267 |
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return 0; |
268 |
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} |
269 |
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|
270 |
/* |
/* |
271 |
// turn bitmap into white canvas |
// turn bitmap into white canvas |
272 |
for (offset = 0; offset < 500 * 500 * 3; offset++) { |
for (offset = 0; offset < 500 * 500 * 3; offset++) { |
291 |
perror("malloc"), exit(1); |
perror("malloc"), exit(1); |
292 |
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293 |
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294 |
// calculate segments of bitmap for worker threads/processes and start them |
// calculate bitmap segment length for workers |
295 |
worker_rows = YSIZE / workers; |
worker_rows = YSIZE / workers; |
296 |
if (VERBOSE) |
if (VERBOSE) |
297 |
printf("rows for each worker: %i\n", worker_rows); |
fprintf(stdout, "rows for each worker: %i\n", worker_rows); |
298 |
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|
299 |
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// start workers |
300 |
for (worker_index = 0; worker_index < workers; worker_index++) { |
for (worker_index = 0; worker_index < workers; worker_index++) { |
301 |
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|
302 |
// debugging: just run single thread |
// debugging: just run single thread |
310 |
if (worker_index == workers - 1) { |
if (worker_index == workers - 1) { |
311 |
worker_rows = YSIZE - worker_startrow; |
worker_rows = YSIZE - worker_startrow; |
312 |
if (VERBOSE) |
if (VERBOSE) |
313 |
printf("rows for last worker: %i\n", worker_rows); |
fprintf(stdout, "rows for last worker: %i\n", worker_rows); |
314 |
} |
} |
315 |
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|
316 |
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// assign each worker's arguments |
317 |
worker_args[worker_index].start_row = worker_startrow; |
worker_args[worker_index].start_row = worker_startrow; |
318 |
worker_args[worker_index].number_of_rows = worker_rows; |
worker_args[worker_index].number_of_rows = worker_rows; |
319 |
worker_args[worker_index].pBitmap = pDataBitmap; |
worker_args[worker_index].pBitmap = pDataBitmap; |
320 |
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|
321 |
worker_handles[worker_index] = CreateThread( |
if (!use_processes) { |
|
NULL, // LPSECURITY_ATTRIBUTES lpThreadAttributes, |
|
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0, // SIZE_T dwStackSize, |
|
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&fractal_thread, // LPTHREAD_START_ROUTINE lpStartAddress, |
|
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&worker_args[worker_index], // LPVOID lpParameter, |
|
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0, // DWORD dwCreationFlags, |
|
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NULL // LPDWORD lpThreadId |
|
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); |
|
322 |
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323 |
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worker_handles[worker_index] = CreateThread( |
324 |
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NULL, // LPSECURITY_ATTRIBUTES lpThreadAttributes, |
325 |
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0, // SIZE_T dwStackSize, |
326 |
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&fractal_create_segment, // LPTHREAD_START_ROUTINE lpStartAddress, |
327 |
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&worker_args[worker_index], // LPVOID lpParameter, |
328 |
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0, // DWORD dwCreationFlags, |
329 |
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NULL // LPDWORD lpThreadId |
330 |
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); |
331 |
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332 |
|
if (!worker_handles[worker_index]) |
333 |
|
printErrorAndExit("CreateThread failed", GetLastError()); |
334 |
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|
335 |
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} else { |
336 |
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|
337 |
|
_snprintf(szCmdline, 1023, "%s %s %i %i", argv[0], "--worker", worker_startrow, worker_rows); |
338 |
|
if (VERBOSE) |
339 |
|
fprintf(stdout, "starting worker process: %s\n", szCmdline); |
340 |
|
ZeroMemory( &si, sizeof(si) ); |
341 |
|
si.cb = sizeof(si); |
342 |
|
ZeroMemory( &pi, sizeof(pi) ); |
343 |
|
|
344 |
|
if (!CreateProcess( |
345 |
|
NULL, // No module name (use command line) |
346 |
|
szCmdline, // Command line |
347 |
|
NULL, // Process handle not inheritable |
348 |
|
NULL, // Thread handle not inheritable |
349 |
|
FALSE, // Set handle inheritance to FALSE |
350 |
|
0, // No creation flags |
351 |
|
NULL, // Use parent's environment block |
352 |
|
NULL, // Use parent's starting directory |
353 |
|
&si, // Pointer to STARTUPINFO structure |
354 |
|
&pi // Pointer to PROCESS_INFORMATION structure |
355 |
|
)) |
356 |
|
printErrorAndExit("CreateProcess failed", GetLastError()); |
357 |
|
|
358 |
|
worker_handles[worker_index] = pi.hProcess; |
359 |
|
|
360 |
|
} |
361 |
|
|
362 |
} |
} |
363 |
|
|
364 |
// wait for all threads |
// wait for all threads |
365 |
if (VERBOSE) |
if (VERBOSE) |
366 |
printf("waiting...\n"); |
fprintf(stdout, "waiting for workers to finish...\n"); |
367 |
if (WaitForMultipleObjects(workers, worker_handles, TRUE, INFINITE) == WAIT_FAILED) |
if (WaitForMultipleObjects(workers, worker_handles, TRUE, INFINITE) == WAIT_FAILED) |
368 |
perror("WaitForMultipleObjects"); |
perror("WaitForMultipleObjects"); |
369 |
|
|