SmartPDCode/f427/applications/lock.c

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include "log.h"
#include "lock.h"



#define MALLOC    malloc
#define FREE      free


lock_t lock_init(void)
{
    int r;
    pthread_mutex_t *m=MALLOC(sizeof(pthread_mutex_t));
    if(!m) {
        return 0;
    }
    
    r = pthread_mutex_init(m, NULL);
    if(r) {
        LOGE("pthread_mutex_create failed\n");
        FREE(m); return 0;
    }
    
    return (lock_t)m;
}


int lock_deinit(lock_t h)
{
    int r;
    
    if(!h) {
        return -1;
    }
    
    r = pthread_mutex_destroy((pthread_mutex_t*)h);
    FREE((void*)h);
    return r;
}


int lock_on(lock_t h)
{
    if(!h) {
        return -1;
    }
    
    return pthread_mutex_lock((pthread_mutex_t*)h);
}


int lock_off(lock_t h)
{
    if(!h) {
        return -1;
    }
    
    return pthread_mutex_unlock((pthread_mutex_t*)h);
}