Threads Completed
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jazzy1902
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5f81932a32
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c30932de97
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <cstdint>
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#include "important.h"
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#include <pthread.h>
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#include <iostream>
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#include <chrono>
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#include <fstream>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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using namespace std;
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int current_index = 0;
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int sum;
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struct image_t* input_image;
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struct image_t* smoother;
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struct image_t* details;
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struct image_t* sharp;
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int a = 1;
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int lock1 = 0; // initial lock set
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int lock2 = 1; // initial lock set
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int lock3 = 0; // initial lock set
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int lock4 = 1; // initial lock set
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int pt = 1;
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int pt1 = 1;
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void* S1_smoothen(void* thread_number)
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{
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int my_number = *(int *)thread_number;
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//cout << input_image->width << input_image->height << " " << input_image->image_pixels << endl;
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int width = input_image->width;
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int height = input_image->height;
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// memory allocation
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// struct image_t* smoother = new struct image_t;
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for(pt = 1; pt <= 1000; ++pt) {
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while(__sync_lock_test_and_set(&lock1,1));
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printf("thread number : %d\tindex : %d\n", my_number, pt);
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for(int i = 1; i < height-1; i++)
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{
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for(int j = 1; j < width-1; j++)
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{
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for(int k = 0; k < 3; k++)
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{
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//image->image_pixels[i][j][k] = val;
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// edge cases
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if(i == 0 && j == 0) { // i-1 and j - 1 doesnt exist
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smoother->image_pixels[i][j][k] = ( input_image->image_pixels[i][j][k] / 9+ input_image->image_pixels[i][j+1][k] / 9 + input_image->image_pixels[i+1][j][k] / 9 + input_image->image_pixels[i+1][j+1][k] / 9);
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}
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else if(i == height - 1 && j == 0) { // i+1 and j-1 does not exist
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smoother->image_pixels[i][j][k] = ( input_image->image_pixels[i-1][j][k] / 9 + input_image->image_pixels[i-1][j+1][k] / 9+ input_image->image_pixels[i][j][k] / 9+ input_image->image_pixels[i][j+1][k] / 9);
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}
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else if(i == 0 && j == width - 1) { // i-1 and j+1 does not exist
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smoother->image_pixels[i][j][k] = ( input_image->image_pixels[i][j-1][k] / 9 + input_image->image_pixels[i][j][k] / 9+ input_image->image_pixels[i+1][j-1][k] / 9 + input_image->image_pixels[i+1][j][k] / 9);
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}
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else if(i == height - 1 && j == width - 1) { // i+1 and j+1 does not exist
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smoother->image_pixels[i][j][k] = ( input_image->image_pixels[i-1][j-1][k] / 9 + input_image->image_pixels[i-1][j][k] / 9 + input_image->image_pixels[i][j-1][k] / 9 + input_image->image_pixels[i][j][k] / 9);
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}
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else if (i == 0) { // i - 1 does not exist
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smoother->image_pixels[i][j][k] = ( input_image->image_pixels[i][j-1][k] / 9 + input_image->image_pixels[i][j][k] / 9+ input_image->image_pixels[i][j+1][k] / 9+ input_image->image_pixels[i+1][j-1][k] / 9+ input_image->image_pixels[i+1][j][k] / 9+ input_image->image_pixels[i+1][j+1][k] / 9);
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}
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else if(j == 0) { // j -1 does not exist
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smoother->image_pixels[i][j][k] = ( input_image->image_pixels[i-1][j][k] / 9+ input_image->image_pixels[i-1][j+1][k] / 9+ input_image->image_pixels[i][j][k] / 9+ input_image->image_pixels[i][j+1][k] / 9+ input_image->image_pixels[i+1][j][k] / 9+ input_image->image_pixels[i+1][j+1][k]/ 9);
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}
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else if(i == height - 1) { // i+1 does not exist
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smoother->image_pixels[i][j][k] = ( input_image->image_pixels[i-1][j-1][k] / 9+ input_image->image_pixels[i-1][j][k] / 9+ input_image->image_pixels[i-1][j+1][k] / 9+ input_image->image_pixels[i][j-1][k] / 9+ input_image->image_pixels[i][j][k] / 9+ input_image->image_pixels[i][j+1][k]/ 9);
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}
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else if(j == width - 1) { // j + 1 does not exist
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smoother->image_pixels[i][j][k] = ( input_image->image_pixels[i-1][j-1][k] / 9+ input_image->image_pixels[i-1][j][k] / 9+ input_image->image_pixels[i][j-1][k] / 9+ input_image->image_pixels[i][j][k]/ 9 + input_image->image_pixels[i+1][j-1][k] / 9+ input_image->image_pixels[i+1][j][k] / 9);
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}
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else {
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smoother->image_pixels[i][j][k] = ( input_image->image_pixels[i-1][j-1][k] / 9 + input_image->image_pixels[i-1][j][k] / 9 + input_image->image_pixels[i-1][j+1][k]/9 + input_image->image_pixels[i][j-1][k]/9 + input_image->image_pixels[i][j][k] / 9 + input_image->image_pixels[i][j+1][k] / 9 + input_image->image_pixels[i+1][j-1][k] / 9 + input_image->image_pixels[i+1][j][k] / 9 + input_image->image_pixels[i+1][j+1][k] / 9);
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}
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}
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}
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}
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__sync_lock_release(&lock2);
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__sync_lock_release(&lock1);
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}
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return nullptr;
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}
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// atomic_flag lock_stream2 = ATOMIC_FLAG_INIT; // initial lock set
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void* S2_find_details(void *thread_number)
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{
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int my_number = *(int *)thread_number;
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int width = input_image->width;
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int height = input_image->height;
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for(pt1 = 0; pt1 <= 1000; ++pt1) {
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while(__sync_lock_test_and_set(&lock2,1));
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while(__sync_lock_test_and_set(&lock1,1));
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while(__sync_lock_test_and_set(&lock3,1));
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// while(lock_stream1.test_and_set());
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// while(lock_stream2.test_and_set());
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printf("thread number : %d\tindex : %d\n", my_number, pt1);
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for(int i = 1; i < height-1; i++)
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{
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for(int j = 1; j < width-1; j++)
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{
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for(int k = 0; k < 3; k++)
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{
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details->image_pixels[i][j][k] = max(0, (input_image->image_pixels[i][j][k] - smoother->image_pixels[i][j][k]));
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}
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}
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}
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__sync_lock_release(&lock1);
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__sync_lock_release(&lock4);
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__sync_lock_release(&lock3);
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if(pt >= 1000)
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{
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__sync_lock_release(&lock2);
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}
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}
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return nullptr;
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}
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void* S3_sharpen(void* thread_number)
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{
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int my_number = *(int *)thread_number;
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int width = input_image->width;
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int height = input_image->height;
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for(int pt2 = 1; pt2 <= 1000; ++pt2) {
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// while(lock_stream2.test_and_set());
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while (__sync_lock_test_and_set(&lock4, 1));
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while (__sync_lock_test_and_set(&lock3, 1));
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printf("thread number : %d\tindex : %d\n", my_number, pt2);
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for(int i = 1; i < height-1; i++)
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{
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for(int j = 1; j < width-1; j++)
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{
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for(int k = 0; k < 3; k++)
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{
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sharp->image_pixels[i][j][k] = min(255, input_image->image_pixels[i][j][k] + details->image_pixels[i][j][k]) * a;
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}
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}
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}
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__sync_lock_release(&lock3);
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if(pt1 >= 1000)
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{
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__sync_lock_release(&lock4);
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}
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}
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return nullptr;
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}
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int main(int argc, char *argv[]) {
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pthread_t thread1, thread2, thread3;
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int iret1, iret2, iret3;
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int thread_number1 = 1, thread_number2 = 2, thread_number3 = 3;
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input_image = read_ppm_file(argv[1]);
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smoother = new struct image_t;
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details = new struct image_t;
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sharp = new struct image_t;
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int width = input_image->width;
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int height = input_image->height;
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// memory allocation for global smoothened image ------------ threads share same global variable
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smoother->height = height;
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smoother->width = width;
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smoother->image_pixels = new uint8_t**[height];
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for(int i = 0; i < height; i++)
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{
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smoother->image_pixels[i] = new uint8_t*[width];
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for(int j = 0; j < width; j++)
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smoother->image_pixels[i][j] = new uint8_t[3];
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}
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// memory allocation for global detailed image
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details->height = height;
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details->width = width;
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details->image_pixels = new uint8_t**[height];
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for(int i = 0; i < height; i++)
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{
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details->image_pixels[i] = new uint8_t*[width];
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for(int j = 0; j < width; j++)
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details->image_pixels[i][j] = new uint8_t[3];
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}
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// memory allocation for global sharper image
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sharp->height = height;
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sharp->width = width;
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sharp->image_pixels = new uint8_t**[height];
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for(int i = 0; i < height; i++)
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{
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sharp->image_pixels[i] = new uint8_t*[width];
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for(int j = 0; j < width; j++)
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sharp->image_pixels[i][j] = new uint8_t[3];
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}
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/* Create independent threads each of which will execute function */
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iret1 = pthread_create(&thread1, NULL, S1_smoothen, &thread_number1);
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if(iret1)
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{
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fprintf(stderr,"Error - pthread_create() return code: %d\n",iret1);
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exit(EXIT_FAILURE);
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}
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iret2 = pthread_create(&thread2, NULL, S2_find_details, &thread_number2);
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if(iret2)
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{
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fprintf(stderr,"Error - pthread_create() return code: %d\n",iret2);
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exit(EXIT_FAILURE);
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}
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iret3 = pthread_create(&thread3, NULL, S3_sharpen, &thread_number3);
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if(iret3)
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{
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fprintf(stderr,"Error - pthread_create() return code: %d\n",iret3);
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exit(EXIT_FAILURE);
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}
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pthread_join(thread1, NULL);
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pthread_join(thread2, NULL);
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pthread_join(thread3, NULL);
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// printf("\nsum = %d\n", sum);
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printf("ttis");
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exit(EXIT_SUCCESS);
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return 1;
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}
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