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race-cond-mutex-lock.c
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race-cond-mutex-lock.c
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#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<pthread.h>
int mail = 0;
pthread_mutex_t lock;//defining the mutex lock
//----traditional way - but not working
// int lock=0;
// void* routine(){
// for(int i=0;i<100000;i++){
// if(lock == 1){
// while(lock==1){}
// }
// lock=1;
// mail++;
// lock=0;
// }
// }
void* routine(){
for(int i=0;i<100000;i++){
pthread_mutex_lock(&lock);//locking the section for corresponding thread(s)
mail++;
pthread_mutex_unlock(&lock);//unlocking the section for corresponding thread(s)
}
}
int main(int argc, char* argv[]){
pthread_t t1,t2;
//initializing the mutex lock
if(pthread_mutex_init(&lock,NULL)!=0){
printf("failed to create the mutex lock!\n");
}
if(pthread_create(&t1,NULL,&routine,NULL) != 0){
return 1;
}
if(pthread_create(&t2,NULL,&routine,NULL) != 0){
return 2;
}
if(pthread_join(t1,NULL) != 0){
return 3;
}
if(pthread_join(t2,NULL) != 0){
return 4;
}
//destroyint the mutex lock
pthread_mutex_destroy(&lock);
printf("Number of mails received is: %d\n",mail);
return 0;
}