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QuestionMemory leak Pin
a_matseevsky25-Feb-13 9:19
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AnswerRe: Memory leak Pin
Richard Andrew x6425-Feb-13 10:11
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GeneralRe: Memory leak Pin
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GeneralRe: Memory leak Pin
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Question[Solved] Memory leak in producer-consumer program Pin
noislude25-Feb-13 7:30
membernoislude25-Feb-13 7:30 
Hi all. Nice to meet you. Could you tell me how can I fix the memory leak of this code? I don't have a clue. Thanks.

#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>

 
#define MAX 100
#define BUFSZ 10

int i;
int buffindex = 0;
char* buffer;
 
void* producer(void* p);
void* consumer(void* p);
 
pthread_cond_t cond_prod = PTHREAD_COND_INITIALIZER;
pthread_cond_t cond_con = PTHREAD_COND_INITIALIZER;
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
 
int main(void)
{
    pthread_t prod, con;
    
    if((buffer = malloc(sizeof(char) * BUFSZ)) == NULL)        
    {     
       perror("malloc");
       exit(EXIT_FAILURE);
    }
    
    pthread_mutex_init(&mutex, NULL);
    pthread_cond_init(&cond_prod, NULL);
    pthread_cond_init(&cond_con, NULL);
    pthread_create(&prod, NULL , producer, NULL);
    pthread_create(&con,  NULL , consumer, NULL);
    pthread_join(prod, NULL);
    pthread_join(con,  NULL);
    pthread_cond_destroy(&cond_prod);
    pthread_cond_destroy(&cond_con);
    pthread_mutex_destroy(&mutex);
    free(buffer);
    return EXIT_SUCCESS;
}
 
void* producer(void* p)
{
    for(i = 0; i < MAX; i++)
    {
       pthread_mutex_lock(&mutex); 
       if(buffindex == BUFSZ)
       {
          pthread_cond_wait(&cond_prod, &mutex); /* down */
       }    
       buffer[buffindex++] = '@';
       printf("Produce: %d\n", buffindex);
       pthread_cond_signal(&cond_con); /* up */
       pthread_mutex_unlock(&mutex);
    }    
    pthread_exit(EXIT_SUCCESS);
    return NULL;
}
 
void* consumer(void* p)
{
   for(i = 0; i < MAX; i++) 
   {
      pthread_mutex_lock(&mutex);
      if(buffindex == -1)
      {
         pthread_cond_wait(&cond_con, &mutex); /* down */
      }     
      printf("Consume: %d\n", buffindex--);
      buffer[buffindex] = '\0';
      pthread_cond_signal(&cond_prod); /* up */ 
      pthread_mutex_unlock(&mutex);
   }    
   pthread_exit(EXIT_SUCCESS);
   return NULL;
}


modified 27-Feb-13 15:48pm.

AnswerRe: Memory leak in producer-consumer program Pin
Richard Andrew x6425-Feb-13 10:08
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GeneralRe: Memory leak in producer-consumer program Pin
noislude25-Feb-13 10:23
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GeneralRe: Memory leak in producer-consumer program Pin
Richard Andrew x6425-Feb-13 10:33
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GeneralRe: Memory leak in producer-consumer program Pin
noislude25-Feb-13 10:42
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QuestionRe: Memory leak in producer-consumer program Pin
DavidCrow25-Feb-13 13:28
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AnswerRe: Memory leak in producer-consumer program Pin
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GeneralRe: Memory leak in producer-consumer program Pin
Stefan_Lang26-Feb-13 3:29
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GeneralRe: Memory leak in producer-consumer program Pin
noislude26-Feb-13 8:07
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GeneralRe: Memory leak in producer-consumer program Pin
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GeneralRe: Memory leak in producer-consumer program Pin
noislude26-Feb-13 22:27
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GeneralRe: Memory leak in producer-consumer program Pin
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SuggestionRe: Memory leak in producer-consumer program Pin
noislude27-Feb-13 9:47
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AnswerRe: Memory leak in producer-consumer program Pin
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QuestionWhat is the MFC future Pin
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QuestionHow to resize a property sheet according to the DPI settings in MFC. Pin
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QuestionDisplaying Image from stream Pin
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