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#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#define USE_THREAD
#include <mt_list.h>
/* Stress test for mt_lists. Compile this way:
* cc -O2 -o test-list test-list.c -I../include -pthread
* The only argument it takes is the number of threads to be used.
* ./test-list 4
*/
struct mt_list pouet_list = MT_LIST_HEAD_INIT(pouet_list);
#define MAX_ACTION 5000000
__thread unsigned int tid;
struct pouet_lol {
struct mt_list list_elt;
};
/* Fixed RNG sequence to ease reproduction of measurements (will be offset by
* the thread number).
*/
__thread uint32_t rnd32_state = 2463534242U;
/* Xorshift RNG from http://www.jstatsoft.org/v08/i14/paper */
static inline uint32_t rnd32()
{
rnd32_state ^= rnd32_state << 13;
rnd32_state ^= rnd32_state >> 17;
rnd32_state ^= rnd32_state << 5;
return rnd32_state;
}
void *thread(void *pouet)
{
struct pouet_lol *lol;
struct mt_list elt2;
tid = (uintptr_t)pouet;
int i;
rnd32_state += tid;
for (i = 0; i < MAX_ACTION; i++) {
switch (rnd32() % 4) {
case 0:
lol = malloc(sizeof(*lol));
MT_LIST_INIT(&lol->list_elt);
MT_LIST_TRY_INSERT(&pouet_list, &lol->list_elt);
break;
case 1:
lol = malloc(sizeof(*lol));
MT_LIST_INIT(&lol->list_elt);
MT_LIST_TRY_APPEND(&pouet_list, &lol->list_elt);
break;
case 2:
lol = MT_LIST_POP(&pouet_list, struct pouet_lol *, list_elt);
if (lol)
free(lol);
break;
case 3:
MT_LIST_FOR_EACH_ENTRY_LOCKED(lol, &pouet_list, list_elt, elt2) {
if (rnd32() % 2) {
free(lol);
lol = NULL;
}
if (rnd32() % 2) {
break;
}
}
break;
default:
break;
}
if ((i) / (MAX_ACTION/10) != (i+1) / (MAX_ACTION/10))
printf("%u: %d\n", tid, i+1);
}
return NULL;
}
int main(int argc, char *argv[])
{
int nb;
pthread_t *pth;
srandom(time(NULL));
if (argc != 2) {
printf("Usage: %s <nb_threads>\n", argv[0]);
exit(1);
}
nb = atoi(argv[1]);
#if 0
if (nb < 2) {
printf("Need at least 2 threads.\n");
exit(1);
}
#endif
pth = malloc(nb * sizeof(*pth));
if (pth == NULL) {
printf("Shot failed to connect.\n");
exit(1);
}
for (int i = 0; i < nb; i++) {
pthread_create(&pth[i], NULL, thread, (void *)(uintptr_t)i);
}
for (int i = 0; i < nb; i++)
pthread_join(pth[i], NULL);
return 0;
}
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