#ifndef __common_h__
#define __common_h__

#include <sys/time.h>
#include <assert.h>
#include <pthread.h>

double
GetTime()
{
    struct timeval t;
    int rc = gettimeofday(&t, NULL);
    assert(rc == 0);
    return (double)t.tv_sec + (double)t.tv_usec/1e6;
}

void
Spin(int howlong)
{
    double t = GetTime();
    while((GetTime() - t) < (double)howlong)
        ;  // do nothing in loop
}


void
Pthread_create(pthread_t *t, const pthread_attr_t *attr,
        void *(*start_routine)(void *), void* arg) {
    int rc = pthread_create(t, attr, start_routine, arg);
    assert(rc == 0);
}

void
Pthread_join(pthread_t thread, void **value_ptr) {
    int rc = pthread_join(thread, value_ptr);
    assert(rc == 0);
}

void
Pthread_mutex_lock(pthread_mutex_t *mutex) {
    int rc = pthread_mutex_lock(mutex);
    assert(rc == 0);
}

void
Pthread_mutex_unlock(pthread_mutex_t *mutex) {
    int rc = pthread_mutex_unlock(mutex);
    assert(rc == 0);
}

void
Pthread_mutex_init(pthread_mutex_t *mutex, pthread_mutexattr_t *attr) {
    int rc = pthread_mutex_init(mutex, attr);
    assert(rc == 0);
}

#endif // __common_h__