15 |
#define YSIZE 500 |
#define YSIZE 500 |
16 |
#include "algorithm.h" |
#include "algorithm.h" |
17 |
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18 |
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#define MAX_COMMAND_LINE 65536 |
19 |
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#define MMAP_NAME "bmp_fractal" |
20 |
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21 |
BOOL VERBOSE = FALSE; |
BOOL VERBOSE = FALSE; |
22 |
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23 |
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52 |
0, |
0, |
53 |
NULL )) |
NULL )) |
54 |
{ |
{ |
55 |
fprintf(stdout, "%s: %s\n", msg, lpMsgBuf); |
fprintf(stderr, "%s: %s\n", msg, lpMsgBuf); |
56 |
LocalFree(lpMsgBuf); |
LocalFree(lpMsgBuf); |
57 |
} |
} |
58 |
else |
else |
59 |
{ |
{ |
60 |
fprintf(stdout, "Error at FormatMesage: %d\n",err=GetLastError()); |
fprintf(stderr, "Error at FormatMesage: %d\n",err=GetLastError()); |
61 |
} |
} |
62 |
exit(err); |
exit(err); |
63 |
} |
} |
71 |
// open file handle |
// open file handle |
72 |
fd = fopen(filename, "wb+"); |
fd = fopen(filename, "wb+"); |
73 |
if (NULL == fd) { |
if (NULL == fd) { |
74 |
perror("open"); |
perror("Error while opening file for writing"); |
75 |
exit(1); |
exit(1); |
76 |
} |
} |
77 |
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80 |
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81 |
// error checking |
// error checking |
82 |
if (-1 == len || len != sizeof(header)) { |
if (-1 == len || len != sizeof(header)) { |
83 |
perror("write"); |
perror("Error while writing header to file"); |
84 |
exit(2); |
exit(2); |
85 |
} |
} |
86 |
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89 |
for (i = 0; i < img_size; i++) { |
for (i = 0; i < img_size; i++) { |
90 |
len = fwrite("\0\0\0", 1, 3, fd); |
len = fwrite("\0\0\0", 1, 3, fd); |
91 |
if (-1 == len || len != 3) { |
if (-1 == len || len != 3) { |
92 |
perror("write"); |
perror("Error while writing data to file"); |
93 |
exit(4); |
exit(4); |
94 |
} |
} |
95 |
} |
} |
96 |
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97 |
// close file handle |
// close file handle |
98 |
fclose(fd); |
if (fclose(fd) != 0) { |
99 |
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perror("Error while closing file handle"); |
100 |
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exit(1); |
101 |
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} |
102 |
} |
} |
103 |
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104 |
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121 |
int x, y; |
int x, y; |
122 |
char bgr[3]; |
char bgr[3]; |
123 |
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thread_id = GetCurrentThreadId(); |
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124 |
// get worker arguments |
// get worker arguments |
125 |
args = (PWORKERARGS)lpParam; |
args = (PWORKERARGS)lpParam; |
126 |
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129 |
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130 |
// debugging |
// debugging |
131 |
if (VERBOSE) { |
if (VERBOSE) { |
132 |
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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); |
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 |
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145 |
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// 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 |
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|
148 |
// transfer color values to current pixel |
// transfer color values to current pixel |
163 |
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164 |
} |
} |
165 |
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//BOOL scan_argv(int argc, char *argv[], char opt_name[], char *opt_value[]) { |
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166 |
BOOL scan_argv(int argc, char *argv[], char opt_name[], char *opt_value) { |
BOOL scan_argv(int argc, char *argv[], char opt_name[], char *opt_value) { |
167 |
int i; |
int i; |
168 |
char * opt_current_name; |
char * opt_current_name; |
193 |
unsigned char *pDataBitmap; |
unsigned char *pDataBitmap; |
194 |
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|
195 |
// workers |
// workers |
196 |
int workers = 5; |
int workers; |
197 |
int worker_index, worker_rows, worker_startrow; |
int worker_index, worker_rows, worker_startrow; |
198 |
HANDLE *worker_handles; |
HANDLE *worker_handles; |
199 |
PWORKERARGS worker_args; |
PWORKERARGS worker_args; |
200 |
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int worker_count; |
201 |
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|
202 |
// threads or processes? |
// threads or processes? |
203 |
BOOL use_processes = FALSE; |
BOOL use_processes = FALSE; |
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 |
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|
211 |
// command line stuff |
// command line stuff |
212 |
char arg_option[1024]; |
char arg_option[1024]; |
215 |
char *verbose_option = ""; |
char *verbose_option = ""; |
216 |
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217 |
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|
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, "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 |
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|
224 |
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225 |
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// 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 |
} |
} |
282 |
} |
} |
283 |
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|
284 |
// create the file mapping object |
// create the file mapping object |
285 |
hMap = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, "bmp_fractal"); |
hMap = CreateFileMapping(hFile, NULL, PAGE_READWRITE, 0, 0, MMAP_NAME); |
286 |
if (NULL == hMap) { |
if (NULL == hMap) { |
287 |
printErrorAndExit("Error at CreateFileMapping", GetLastError()); |
printErrorAndExit("Error at CreateFileMapping", GetLastError()); |
288 |
} |
} |
291 |
} else { |
} else { |
292 |
|
|
293 |
// open existing mapping object |
// open existing mapping object |
294 |
hMap = OpenFileMapping(FILE_MAP_WRITE, FALSE, "bmp_fractal"); |
hMap = OpenFileMapping(FILE_MAP_WRITE, FALSE, MMAP_NAME); |
295 |
if (NULL == hMap) |
if (NULL == hMap) |
296 |
printErrorAndExit("Error at OpenFileMapping", GetLastError()); |
printErrorAndExit("Error at OpenFileMapping", GetLastError()); |
297 |
} |
} |
324 |
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|
325 |
// allocate memory for one worker's arguments |
// allocate memory for one worker's arguments |
326 |
if ((worker_args = malloc(sizeof(worker_args[0]))) == NULL) |
if ((worker_args = malloc(sizeof(worker_args[0]))) == NULL) |
327 |
perror("malloc"), exit(1); |
perror("Error while allocating memory for worker arguments via malloc"), exit(1); |
328 |
|
|
329 |
// assign worker's arguments |
// assign worker's arguments |
330 |
worker_args[0].start_row = worker_startrow; |
worker_args[0].start_row = worker_startrow; |
357 |
|
|
358 |
// allocate memory for table of all worker handles |
// allocate memory for table of all worker handles |
359 |
if ((worker_handles = malloc(workers * sizeof(worker_handles[0]))) == NULL) |
if ((worker_handles = malloc(workers * sizeof(worker_handles[0]))) == NULL) |
360 |
perror("malloc"), exit(1); |
perror("Error while allocating memory for worker handles via malloc"), exit(1); |
361 |
|
|
362 |
// allocate memory for table of all worker arguments |
// allocate memory for table of all worker arguments |
363 |
if ((worker_args = malloc(workers * sizeof(worker_args[0]))) == NULL) |
if ((worker_args = malloc(workers * sizeof(worker_args[0]))) == NULL) |
364 |
perror("malloc"), exit(1); |
perror("Error while allocating memory for worker arguments via malloc"), exit(1); |
365 |
|
|
366 |
|
|
367 |
// calculate bitmap segment length for workers |
// calculate bitmap segment length for workers |
409 |
|
|
410 |
if (VERBOSE) |
if (VERBOSE) |
411 |
verbose_option = "--verbose"; |
verbose_option = "--verbose"; |
412 |
_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); |
413 |
if (VERBOSE) |
if (VERBOSE) |
414 |
fprintf(stdout, "starting worker process: %s\n", szCmdline); |
fprintf(stdout, "starting worker process: %s\n", szCmdline); |
415 |
|
|
416 |
|
// prepare data structures for CreateProcess |
417 |
ZeroMemory( &si, sizeof(si) ); |
ZeroMemory( &si, sizeof(si) ); |
418 |
si.cb = sizeof(si); |
si.cb = sizeof(si); |
419 |
ZeroMemory( &pi, sizeof(pi) ); |
ZeroMemory( &pi, sizeof(pi) ); |
438 |
|
|
439 |
} |
} |
440 |
|
|
|
// wait for all threads |
|
441 |
if (VERBOSE) |
if (VERBOSE) |
442 |
fprintf(stdout, "waiting for workers to finish...\n"); |
fprintf(stdout, "waiting for workers to finish...\n"); |
443 |
if (WaitForMultipleObjects(workers, worker_handles, TRUE, INFINITE) == WAIT_FAILED) |
|
444 |
perror("WaitForMultipleObjects"); |
// wait for all workers |
445 |
|
for (worker_index = 0; worker_index < workers; worker_index += MAXIMUM_WAIT_OBJECTS) { |
446 |
|
worker_count = ((workers - worker_index) > MAXIMUM_WAIT_OBJECTS) ? MAXIMUM_WAIT_OBJECTS : (workers - worker_index); |
447 |
|
if (WaitForMultipleObjects(worker_count, &worker_handles[worker_index], TRUE, INFINITE) == WAIT_FAILED) |
448 |
|
printErrorAndExit("Error at WaitForMultipleObjects", GetLastError()); |
449 |
|
} |
450 |
|
|
451 |
// debugging: just run single thread |
// debugging: just run single thread |
452 |
//if (WaitForSingleObject(worker_handles[0], INFINITE) == WAIT_FAILED) |
//if (WaitForSingleObject(worker_handles[0], INFINITE) == WAIT_FAILED) |
453 |
// perror("WaitForSingleObject"); |
// perror("WaitForSingleObject"); |
454 |
|
|
455 |
// close all worker handles |
// close all worker handles |
456 |
for (worker_index = 0; worker_index < workers; worker_index++) |
for (worker_index = 0; worker_index < workers; worker_index++) { |
457 |
CloseHandle(worker_handles[worker_index]); |
if (!CloseHandle(worker_handles[worker_index])) |
458 |
|
printErrorAndExit("Error at CloseHandle for worker handles", GetLastError()); |
459 |
|
} |
460 |
|
|
461 |
// write the result into the file |
// write the result into the file |
462 |
if (!FlushViewOfFile(pData, 0)) { |
if (!FlushViewOfFile(pData, 0)) |
463 |
err = GetLastError(); |
printErrorAndExit("Error at UnmapViewOfFile", GetLastError()); |
|
printErrorAndExit("Error at UnmapViewOfFile", err); |
|
|
} |
|
464 |
|
|
465 |
// remove the mapped file |
// remove the mapped file |
466 |
if (!UnmapViewOfFile(pData)) { |
if (!UnmapViewOfFile(pData)) |
467 |
err = GetLastError(); |
printErrorAndExit("Error at UnmapViewOfFile", GetLastError()); |
|
printErrorAndExit("Error at UnmapViewOfFile", err); |
|
|
exit(err); |
|
|
} |
|
468 |
|
|
469 |
// cleanup handles |
// cleanup handles |
470 |
if (!CloseHandle(hMap) || !CloseHandle(hFile) ) { |
if (!CloseHandle(hMap) || !CloseHandle(hFile) ) |
471 |
err = GetLastError(); |
printErrorAndExit("Error at CloseHandle for memory mapped file", GetLastError()); |
|
printErrorAndExit("Error at CloseHandle", err); |
|
|
} |
|
472 |
|
|
473 |
free(worker_args); |
free(worker_args); |
474 |
free(worker_handles); |
free(worker_handles); |