#include<stdio.h>
#include<stdbool.h>
#include<stdlib.h>
#include<string.h>

#include<semaphore.h>
#include<unistd.h>
#include<stdio.h>
#include<stdlib.h>
#include<sys/wait.h>
#include<sys/mman.h>
#include<stdbool.h>
#include <sys/stat.h>        /* For mode constants */
       #include <fcntl.h>
#include<math.h>
#define ARRAY_MAX (1024)
#define MAX (256)

#define osAssert(cond, userMsg) osErrorFatal(cond, userMsg,__FILE__,__LINE__)

void osErrorFatal(bool cond, const char* userMsg, const char* file, const int line){
    if(!cond){
        perror(userMsg);
        fprintf(stderr,"File:%s:%d\n",file, line);
        exit(EXIT_FAILURE);
    }
}

typedef struct {
sem_t inDataReady;
float array[ARRAY_MAX];
unsigned arrayLen;
} OsInputData;

void *getmem(char* name,int *size){

    int memfd=shm_open(name,O_RDWR,0600);
    osAssert(-1!=memfd,"smh");

    struct stat finfo;
    osAssert(-1!=fstat(memfd,&finfo),"stat");
    *size=finfo.st_size;

    void *addr;

    osAssert(MAP_FAILED!=(addr=(mmap(NULL,*size,PROT_READ | PROT_WRITE,MAP_SHARED,memfd,0))),"mmap");
    close(memfd);
    return addr;
}

int main(int argc,char** argv){

    osAssert(argc == 3,"args missing");
    int size;
    int size1;

    OsInputData* mem1=getmem(argv[1],&size);
    OsInputData* mem2=getmem(argv[2],&size1);

    mem2->arrayLen=0;

    osAssert(-1!=sem_wait(&(mem1->inDataReady)),"sem wait");

    for(int i=0;i<mem1->arrayLen;i++){
        int broj=mem1->array[i];
        int br=0;
        unsigned mask=1<<(sizeof(int)*8-1);
        while(mask){
            if(broj&mask)
                br++;

        }
        if(br>=4){
            mem2->array[mem2->arrayLen++]=mem1->array[i];
        }
    }

    osAssert(-1!=sem_post(&(mem2->inDataReady)),"sme post");
    osAssert(-1!=munmap(mem1,size),"mem1 munmap");
    osAssert(-1!=munmap(mem2,size1),",e,2 munmap");




    return 0;
}