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update c file #1

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55 changes: 29 additions & 26 deletions openMp_test.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2,37 +2,40 @@
#include <stdio.h>
#include <stdlib.h>

#define ROW 2;
#define COL 2;
#define ROW 2
#define COL 2
#define SECTOR_HEIGHT 2
#define SECTOR_WIDTH 2

// given row r and column c and thread ID t_id, you can map thread ID into region of array using following formula
// array(r,c) = array[r+m*t_id][c+m*t_id]
void secureAccess(int array[2][2], int threadID){
// 1. Map threadID to location in array
int row = threadID / ROW;
int col = threadID % COL;

// 2. Modify array based on this mapping
printf("array value: %d, row: %d, col: %d, ThreadID: %d\n"
, array[row][col], row, col, threadID);
// 1. Map threadID to location in array
int row = threadID / ROW;
int col = threadID % COL;

// 2. Modify array based on this mapping
printf("array value: %d, row: %d, col: %d, ThreadID: %d\n" , array[row][col], row, col, threadID);

}

int main(int argc, char *argv[]){
int nthreads, tid;
int array[ROW][COL] = {
{0, 0},
{0, 0}
};
int nthreads, tid;
int array[ROW][COL] = {
{0, 0},
{0, 0}
};

#pragma omp parallel private(nthreads, tid)
{
#pragma omp parallel private(nthreads, tid)
{

tid = omp_get_thread_num();
printf("Hello World from thead = %d\n", tid);
if (tid == 0){
nthreads = omp_get_num_threads();
printf("Number of threads = %d\n", nthreads);
}
secureAccess(array, tid);
}
return 0;
}
tid = omp_get_thread_num();
printf("Hello World from thead = %d\n", tid);
if (tid == 0){
nthreads = omp_get_num_threads();
printf("Number of threads = %d\n", nthreads);
}
secureAccess(array, tid);
}
return 0;
}