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#define YSIZE 500 |
#define YSIZE 500 |
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#include "algorithm.h" |
#include "algorithm.h" |
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BOOL VERBOSE = FALSE; |
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/* BMP Header */ |
/* BMP Header */ |
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unsigned char header[54]={0x42,0x4d, // signature BM |
unsigned char header[54]={0x42,0x4d, // signature BM |
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// get worker arguments |
// get worker arguments |
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args = (PWORKERARGS)lpParam; |
args = (PWORKERARGS)lpParam; |
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printf("----------------------------------------------\n"); |
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printf("thread_id: %i\n", thread_id); |
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printf("arg.start_row: %i\n", args->start_row); |
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printf("arg.number_of_rows: %i\n", args->number_of_rows); |
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// calculate pointer to beginning of segment |
// calculate pointer to beginning of segment |
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pDataBitmapSegment = (unsigned char *)((INT_PTR)args->pBitmap + (YSIZE - (args->start_row + args->number_of_rows)) * 3 * XSIZE); |
pDataBitmapSegment = (unsigned char *)((INT_PTR)args->pBitmap + (YSIZE - (args->start_row + args->number_of_rows)) * 3 * XSIZE); |
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printf("segment_start: %p\n", pDataBitmapSegment); |
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// debugging |
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if (VERBOSE) { |
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printf("----------------------------------------------\n"); |
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printf("thread_id: %i\n", thread_id); |
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printf("arg.start_row: %i\n", args->start_row); |
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printf("arg.number_of_rows: %i\n", args->number_of_rows); |
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printf("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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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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// debugging |
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//printf("pointer: %p\n", pDataBitmapCurrent); |
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// transfer color values to current pixel |
// transfer color values to current pixel |
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pDataBitmapSegment[0] = bgr[0]; |
pDataBitmapSegment[0] = bgr[0]; |
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pDataBitmapSegment[1] = bgr[1]; |
pDataBitmapSegment[1] = bgr[1]; |
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pDataBitmapSegment += 3; |
pDataBitmapSegment += 3; |
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} |
} |
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//no padding required because 1500%4 =0 |
//no padding required because 1500%4 =0 ??? |
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} |
} |
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printf("thread finished: %i\n", thread_id); |
if (VERBOSE) |
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printf("thread finished: %i\n", thread_id); |
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return 0; |
return 0; |
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} |
} |
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DWORD err; |
DWORD err; |
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HANDLE hMap, hFile; |
HANDLE hMap, hFile; |
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LPVOID pData; |
LPVOID pData; |
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unsigned char *pDataBitmap, *pDataBitmapCurrent; |
unsigned char *pDataBitmap; |
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// workers |
// workers |
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int workers = 5; |
int workers = 50; |
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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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//struct WorkerArguments *worker_args; |
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PWORKERARGS worker_args; |
PWORKERARGS worker_args; |
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pDataBitmap = (unsigned char *)((INT_PTR)pData + sizeof(header)); |
pDataBitmap = (unsigned char *)((INT_PTR)pData + sizeof(header)); |
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// debugging |
// debugging |
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printf("pos. of file: %p\n", pData); |
if (VERBOSE) { |
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printf("pos. of bitmap: %p\n", pDataBitmap); |
printf("pos. of file: %p\n", pData); |
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printf("pos. of bitmap: %p\n", pDataBitmap); |
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// pointer to current pixel |
} |
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pDataBitmapCurrent = pDataBitmap; |
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/* |
/* |
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// turn bitmap into white wand |
// turn bitmap into white canvas |
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for (offset = 0; offset < 500 * 500 * 3; offset++) { |
for (offset = 0; offset < 500 * 500 * 3; offset++) { |
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//pDataBitmap[offset] = 255; |
*pDataBitmap = 255; |
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*pDataBitmapCurrent = 255; |
pDataBitmap++; |
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pDataBitmapCurrent++; |
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} |
} |
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exit(0); |
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*/ |
*/ |
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// allocate memory for bitmap |
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/* |
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if ((pDataBitmap = malloc(XSIZE * YSIZE * 3 * sizeof(pDataBitmap[0]))) == NULL) |
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perror("malloc"), exit(1); |
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*/ |
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// allocate memory for table of all worker handles |
// allocate memory for table of all worker handles |
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if ((worker_handles = malloc(workers * sizeof worker_handles[0])) == NULL) |
if ((worker_handles = malloc(workers * sizeof(worker_handles[0]))) == NULL) |
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perror("malloc"), exit(1); |
perror("malloc"), exit(1); |
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// allocate memory for table of all worker arguments |
// allocate memory for table of all worker arguments |
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if ((worker_args = malloc(workers * sizeof worker_args[0])) == NULL) |
if ((worker_args = malloc(workers * sizeof(worker_args[0]))) == NULL) |
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perror("malloc"), exit(1); |
perror("malloc"), exit(1); |
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// allocate memory for table of all worker arguments |
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/* |
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worker_args = (PWORKERARGS) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY | HEAP_NO_SERIALIZE, workers * sizeof(WORKERARGS)); |
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if (worker_args == NULL) { |
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printErrorAndExit("Failed to allocate on heap", GetLastError()); |
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} |
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*/ |
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// calculate segments of bitmap for worker threads/processes and start them |
// calculate segments of bitmap for worker threads/processes and start them |
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worker_rows = YSIZE / workers; |
worker_rows = YSIZE / workers; |
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printf("rows for each worker: %i\n", worker_rows); |
if (VERBOSE) |
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printf("rows for each worker: %i\n", worker_rows); |
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for (worker_index = 0; worker_index < workers; worker_index++) { |
for (worker_index = 0; worker_index < workers; worker_index++) { |
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// debugging: just run with single thread |
// debugging: just run single thread |
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//if (worker_index == 1) |
//if (worker_index == 1) |
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// continue; |
// continue; |
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// recalculate number of rows for last worker if (YSIZE mod workers) != 0 |
// recalculate number of rows for last worker if (YSIZE mod workers) != 0 |
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if (worker_index == workers - 1) { |
if (worker_index == workers - 1) { |
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worker_rows = YSIZE - worker_startrow; |
worker_rows = YSIZE - worker_startrow; |
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printf("rows for last worker: %i\n", worker_rows); |
if (VERBOSE) |
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printf("rows for last worker: %i\n", worker_rows); |
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} |
} |
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worker_args[worker_index].start_row = worker_startrow; |
worker_args[worker_index].start_row = worker_startrow; |
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worker_handles[worker_index] = CreateThread( |
worker_handles[worker_index] = CreateThread( |
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NULL, // LPSECURITY_ATTRIBUTES lpThreadAttributes, |
NULL, // LPSECURITY_ATTRIBUTES lpThreadAttributes, |
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0, // SIZE_T dwStackSize, |
0, // SIZE_T dwStackSize, |
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fractal_thread, // LPTHREAD_START_ROUTINE lpStartAddress, |
&fractal_thread, // LPTHREAD_START_ROUTINE lpStartAddress, |
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&worker_args[worker_index], // LPVOID lpParameter, |
&worker_args[worker_index], // LPVOID lpParameter, |
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0, // DWORD dwCreationFlags, |
0, // DWORD dwCreationFlags, |
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NULL // LPDWORD lpThreadId |
NULL // LPDWORD lpThreadId |
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} |
} |
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// wait for all threads |
// wait for all threads |
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if (VERBOSE) |
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printf("waiting...\n"); |
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if (WaitForMultipleObjects(workers, worker_handles, TRUE, INFINITE) == WAIT_FAILED) |
if (WaitForMultipleObjects(workers, worker_handles, TRUE, INFINITE) == WAIT_FAILED) |
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perror("WaitForMultipleObjects"); |
perror("WaitForMultipleObjects"); |
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// debugging: just run with single thread |
// debugging: just run single thread |
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//if (WaitForSingleObject(worker_handles[0], INFINITE) == WAIT_FAILED) |
//if (WaitForSingleObject(worker_handles[0], INFINITE) == WAIT_FAILED) |
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// perror("WaitForSingleObject"); |
// perror("WaitForSingleObject"); |
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printErrorAndExit("Error at CloseHandle", err); |
printErrorAndExit("Error at CloseHandle", err); |
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} |
} |
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/* |
free(worker_args); |
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if (HeapFree(GetProcessHeap(), HEAP_ZERO_MEMORY | HEAP_NO_SERIALIZE, worker_args) != TRUE) { |
free(worker_handles); |
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printErrorAndExit("Call to HeapFree has failed", GetLastError()); |
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} |
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*/ |
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return 0; |
return 0; |
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