trying to fix the deadlock

functions.c

@@ -315,14 +315,17 @@ void* produce(){
 }
 
 void* compute(){
-    while(done || buffer->size != 0) {
+    while(done || buffer->size != 0 ) {
         long long number;
         //start of critical area
         printf("waiting compute\n");
         sem_wait(&full);
         pthread_mutex_lock(&mutex);
         if(counter <=0){
-
+            pthread_mutex_unlock(&mutex);
+            sem_post(&empty);
+            sem_post(&full);
+            return NULL;
         }
         else{
            number = pop(buffer);
@@ -344,6 +347,7 @@ void* compute(){
             printf("HIIIIII\n" );
             pthread_mutex_unlock(&mutex2);
             sem_post(&empty2);
+            sem_post(&full);
             return NULL;
         }
         /*

main.c

@@ -99,6 +99,7 @@ int main(int argc, char** argv){
     //sem_post(&full);
     //sem_wait(&empty);
     //sem_post(&empty);
+    /*
     sem_post(&full);
     sem_post(&full);
     sem_post(&full);
@@ -106,6 +107,7 @@ int main(int argc, char** argv){
     sem_post(&full);
     sem_post(&full);
     sem_post(&full);
+    */
     printf("------------ joined reader ---------------\n");
 
     for(int i =0; i < Args.nThreads; i++){
@@ -113,7 +115,9 @@ int main(int argc, char** argv){
             printf("Error while joining one of the computing threads");
             return EXIT_FAILURE;
         }
+        printf("---------------------------------one thread finished\n");
     }
+    /*
     sem_post(&full2);
     sem_post(&full2);
     sem_post(&full2);
@@ -121,6 +125,7 @@ int main(int argc, char** argv){
     sem_post(&full2);
     sem_post(&full2);
     sem_post(&full2);
+    */
     done2=0;
     printf("------------- joined compute ------------\n");