My program does NOT compile please help

[Nanoooo]

hello,

I have to do the program for the bounded buffer problem in UNIX C and what I have so far is the following code

#include"genSema.h"
#include<stdlib.h>
#include<stdio.h>
#include<pthread.h>
#include<sys/types.h>
#include<sys/times.h>
#include<unistd.h>
 
int itCount=100;
int N;
int P_RAND_SEED = 1234;
int C_RAND_SEED = 1234;
#define FALSE 0;
#define TRUE 1;
int runFlag = TRUE;
gen_semaphore *full;
gen_semaphore *empty;
void *producer(void *wp);
void *consumer(void *wp);
 
struct buffer_t{
       int buffer[10];
       unsigned int nextFull;
       unsigned int nextEmpty;
 
}widgets;
 
void* producer(void *wp)
{
       char *message1;
       message1 = (char *)wp;
       printf("%s ", message1);
       int runFlag = TRUE;
       int timeToProduce=100000;
       int itCount;
       struct buffer_t *widgPtr;
       widgPtr = (struct buffer_t *)wp;
       srand(P_RAND_SEED);
       itCount=100;
       while(runFlag) {
             usleep(rand()%timeToProduce);
             P(empty);
             if((widgPtr->nextEmpty + 1)%N == widgPtr->nextFull)
               continue;
             widgPtr->buffer[widgPtr->nextEmpty] = itCount++;
             widgPtr->nextEmpty = (widgPtr->nextEmpty+1) % N;
             V(full);
       }
      printf("Producer: Terminating\\n");  
}
 
void* consumer(void *wp)
{
       char *message2;
       message2 = (char *)wp;
       printf("%s ", message2);
       int itCount;
       int timeToConsume=100000;
       struct buffer_t *widgPtr;
       widgPtr = (struct buffer_t *) wp;       
       srand(C_RAND_SEED);
       int runFlag = TRUE;
       while(runFlag) {
          P(full);
          itCount = widgPtr->buffer[widgPtr->nextFull];
          widgPtr->nextFull = (widgPtr->nextFull+1) % N;
          usleep(rand()%timeToConsume);
          V(empty);
      }
     printf("Consumer: Terminating\n");
}
 
main()
{
       int runTime = 2;
       int i;
       pthread_t prod_thrd;
       pthread_t cons_thrd;
       char *message1 = "producer running";
       char *message2 = "consumer running";
       empty = create_gen_semaphore(N);
       full = create_gen_semaphore(0);
       widgets.nextEmpty = 0;
       widgets.nextFull = 0;
       for(i = 0; i < N; i++)
          widgets.buffer[i] = empty;
       pthread_create(&prod_thrd, NULL, producer, message1);
       printf("consumer created at main");
       pthread_create(&cons_thrd, NULL, consumer, message2);
       printf("producer created at main");
       sleep(runTime);
       runFlag = FALSE;
       delete_gen_semaphore(empty);
       delete_gen_semaphore(full);
       printf("Main thread: Terminated\\n");
       exit(1);
}

now, the error I'm getting when compiling the code is the following:

$ gcc -o prodcons prodcons.c
prodcons.c: In function `main':
prodcons.c:86: warning: assignment makes integer from pointer without a 
cast
Undefined                       first referenced
 symbol                             in file
P                                   /var/tmp//cc6O6sjK.o
V                                   /var/tmp//cc6O6sjK.o
create_gen_semaphore                /var/tmp//cc6O6sjK.o
delete_gen_semaphore                /var/tmp//cc6O6sjK.o
ld: fatal: Symbol referencing errors. No output written to prodcons
collect2: ld returned 1 exit status

Please does anyone know what is that mean and why I'm getting this error. Another this that I would like to let you know about is that in the explanation for the code they tell you that "your job is to define all the italicized functions for thread management and syncronization. "

of course the italicized functions are (create_gen_sema phore, delete_gen_sema phore, P, V)

[Banfa]

The first error is on line 86, have you examined that line? Could you describe what you think it is doing?

The other errors are because you have not implemented the functions that you are supposed to implement for you assignment.

And finally what is the purpose of your variable N, it is used in many places but never has a value assigned to it.

[Nanoooo]

well I have looked at the error and that is why I'm asking here because I dont know what is the problem with line 86!!!

The other thing is that I dont know what do you mean about my functions? like I didnt declare them? or what? and I dont know what to assign for N to be honest...

[Banfa]

well I have looked at the error and that is why I'm asking here because I dont know what is the problem with line 86!!!

What were you trying to do with that piece of code?

The other thing is that I dont know what do you mean about my functions? like I didnt declare them? or what? and I dont know what to assign for N to be honest...

No it looks like you declared them but it looks like they are not defined anywhere.

Your program is not going to work if you don't assign something to N. It sounds like you are trying to write your program without having a good idea of what it is meant to be doing.