https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98008
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
If the following C program works, but 54185.cc deadlocks, it suggests there
might be a bug in the libstdc++ code or test instead (this C program fails on
AIX, due to a bug in pthread_cond_wait). This works OK on darwin.
#include <pthread.h>
#include <stddef.h>
#include <stdlib.h>
pthread_cond_t* cv;
pthread_mutex_t mx;
#define N 10
int n;
void* f(void* d)
{
pthread_mutex_lock(&mx);
if (++n == N)
{
/* unblock all threads */
pthread_cond_broadcast(cv);
pthread_cond_destroy(cv);
free(cv);
cv = NULL;
}
else /* block */
pthread_cond_wait(cv, &mx);
pthread_mutex_unlock(&mx);
return d;
}
int main()
{
int i;
pthread_t th[N];
pthread_mutex_init(&mx, NULL);
cv = malloc(sizeof(*cv));
pthread_cond_init(cv, NULL);
for (i = 0; i < N; ++i)
pthread_create(th+i, NULL, f, NULL);
for (i = 0; i < N; ++i)
pthread_join(th[i], NULL);
pthread_mutex_destroy(&mx);
}
