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#include "trand.h"
int g_rfound;
void *thread(void *ma)
{
static pthread_mutex_t mutex;
pthread_mutex_t *m = &mutex;
int r;
for (unsigned long long i = 0; i < *(unsigned long long*)ma; i++)
r = rand();
pthread_mutex_lock((pthread_mutex_t *)m);
if (g_rfound == -1)
g_rfound = r;
pthread_mutex_unlock((pthread_mutex_t *)m);
return (NULL);
}
/*
** Control how many threads to create,
** the more threads the more secure ntrand wil be
*/
int ntrand(unsigned long long n)
{
g_rfound = -1;
pthread_t threads[n];
for (unsigned long long i = 0; i < n; i++)
pthread_create(&(threads[i]), NULL, thread, (void *)(&i));
for (unsigned long long i = 0; i < n; i++)
pthread_join(threads[i], NULL);
return (g_rfound);
}
/*
** Basically rand but we seed with time for you, user-friendly
*/
int strand()
{
g_rfound = -1;
srand(time(NULL));
pthread_mutex_t mutex;
pthread_t threads[DEF_NTHREAD];
for (unsigned long long i = 0; i < DEF_NTHREAD; i++)
pthread_create(&(threads[i]), NULL, thread, (void *)(&i));
for (unsigned long long i = 0; i < DEF_NTHREAD; i++)
pthread_join(threads[i], NULL);
return (g_rfound);
}
/*
* In this version you are responsable for seeding rand()
*/
int trand()
{
g_rfound = -1;
pthread_mutex_t mutex;
pthread_t threads[DEF_NTHREAD];
for (unsigned long long i = 0; i < DEF_NTHREAD; i++)
pthread_create(&(threads[i]), NULL, thread, (void *)(&i));
for (unsigned long long i = 0; i < DEF_NTHREAD; i++)
pthread_join(threads[i], NULL);
return (g_rfound);
}
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