2 producer 1 consumer // it cause dead lock

2producer1consumer.cpp

#include <stdio.h>
#include <pthread.h>
#include <semaphore.h>
#include <math.h>
#include <ctype.h>

#define NUM   15
int number = NUM, buff = 0;
char queue[NUM][NUM];
sem_t full_sem, empty_sem;


void insert(char e[]) {
    if (buff + 1 < number) {
        buff++;
        printf(", inserted text: %s", e);
        int i = 0;
        for (i = 0; i < number; ++i) {
            queue[buff][i] = e[i];
        }
    } else {
        printf("\nfull");
    }
}


void *produce2() {
    int i = 0;
    for (i = 0; i < number; ++i) {
        sem_wait(&full_sem);
        printf("\nP2::  insert random text #%d", i);
        char tmpChar[number];
        int j = 0;
        for (j = 0; j < number; ++j) {
            tmpChar[j] = (char) 'a' + (random() % 26);
        }
        insert(tmpChar);
        sem_post(&empty_sem);
    }


}

void *produce() {
    int i = 0;
    for (i = 0; i < number; ++i) {
        sem_wait(&full_sem);
        printf("\nP1:: insert random text #%d", i);
        char tmpChar[number];
        int j = 0;
        for (j = 0; j < number; ++j) {
            tmpChar[j] = (char) 'a' + (random() % 26);
        }
        insert(tmpChar);
        sem_post(&empty_sem);
    }


}

void *consume(void *a) {

    int i = 0;
    for (i = 0; i < number; ++i) {
        char v[number];
        sem_wait(&empty_sem);

        if (buff > 0) {
            int j = 0;
            for (j = 0; j < number; ++j) {
                v[j] = toupper(queue[buff][j]);
            }
            buff--;
        } else {
            printf("\nempty");
        }

        printf("\nuppercase char: %s", v);
        sem_post(&full_sem);
    }


}

int main() {
    pthread_t t[3];
    sem_init(&full_sem, 0, number - 1);
    sem_init(&empty_sem, 0, 0);

    pthread_create(&t[0], NULL, &produce, NULL);
    pthread_create(&t[1], NULL, &produce2, NULL);

    pthread_create(&t[2], NULL, &consume, NULL);

    pthread_join(t[0], NULL);
    pthread_join(t[1], NULL);
    pthread_join(t[2], NULL);

    sem_destroy(&full_sem);
    sem_destroy(&empty_sem);
    return 0;
}

|SampleOutput

P1:: insert random text #0
P2::  insert random text #0, inserted text: owkkyhiddqscdx▒, inserted text: nwlrbbmqbhcdar▒▒
P2::  insert random text #1, inserted text: jmowfrxsjybldb▒▒
P2::  insert random text #2, inserted text: fsarcbynecdygg▒▒
P2::  insert random text #3
P1:: insert random text #1, inserted text: fwkhopkmcoqhnw▒▒
P1:: insert random text #2, inserted text: xpklorellnmpap▒▒
P2::  insert random text #4, inserted text: jjivswmdkqtbxi▒▒
P2::  insert random text #5, inserted text: mvtrrbljptnsnf▒▒
P2::  insert random text #6, inserted text: kuewhsqmgbbuqc▒▒
uppercase char:
uppercase char: KUEWHSQMGBBUQCL
uppercase char: MVTRRBLJPTNSNFW
uppercase char: JJIVSWMDKQTBXIX
uppercase char:
uppercase char: XPKLORELLNMPAPQ
uppercase char: FSARCBYNECDYGGX
uppercase char: JMOWFRXSJYBLDBE
uppercase char: NWLRBBMQBHCDARZ, inserted text: zqfjmafadrrwso▒▒
P1:: insert random text #3, inserted text: sbcnuvqhffbsaq▒▒
P1:: insert random text #4, inserted text: wpqcacehchzvfr▒▒
P2::  insert random text #7, inserted text: mlnozjkpqpxrjx▒▒
P2::  insert random text #8, inserted text: itzyxacbhhkicq▒▒
P2::  insert random text #9
P1:: insert random text #5, inserted text: gpxiqvkuytdlcg▒▒
P1:: insert random text #6, inserted text: ewhtaciohordtq▒▒
P1:: insert random text #7, inserted text: vwcsgspqoqmsbo▒▒
P1:: insert random text #8, inserted text: guwnnyqxnzlgdg▒▒
P1:: insert random text #9, inserted text: pbtrwblnsadeug▒▒
P1:: insert random text #10, inserted text: umoqcdrubetoky▒▒

P1:: insert random text #11, inserted text: hoachwdvmxxrdr▒▒

P1:: insert random text #12, inserted text: xlmndqtukwagml▒▒
, inserted text: oendtomfgdwdwf▒▒
uppercase char: ZQFJMAFADRRWSOF
uppercase char: OENDTOMFGDWDWFC
P1:: insert random text #13, inserted text: juukwcibxubume▒▒
uppercase char: HOACHWDVMXXRDRY
uppercase char: JUUKWCIBXUBUMEN
uppercase char: UMOQCDRUBETOKYX
uppercase char: PBTRWBLNSADEUGU
P1:: insert random text #14, inserted text: meyatdrmydiajx▒▒
P2::  insert random text #10, inserted text: oghiqfmzhlvihj▒▒

P2::  insert random text #11, inserted text: uvsuyoypayulye▒▒

P2::  insert random text #12, inserted text: muotehzriicfsk▒▒


///// deadlock