void *reader(void *prm)
{
char *entry;
int num = (int) prm;
int total = 0;
int rc;
cp_mutex_lock(&start_mutex);
while (!running)
cp_cond_wait(&start_cond, &start_mutex);
rc = cp_mutex_unlock(&start_mutex);
if (rc == 0) write_err("reader");
while (running || cp_hashtable_count(t[num]) > 0)
{
cp_mutex_lock(&lock[num]);
while (running && cp_list_is_empty(tl[num]))
cp_cond_wait(&cond[num], &lock[num]);
while ((entry = (char *) cp_list_remove_head(tl[num])))
{
cp_hashtable_remove(t[num], entry);
if (!silent)
printf("[%d]: (%ld) entry: %s\n", num, cp_hashtable_count(t[num]), entry);
total++;
free(entry);
}
cp_mutex_unlock(&lock[num]);
}
printf("\n (-) reader %d: processed %d entries\n", num, total);
return NULL;
}
void *writer(void *prm)
{
int i, num;
long count = (long) prm;
char kbuf[30];
char *entry;
cp_mutex_lock(&start_mutex);
while (!running)
cp_cond_wait(&start_cond, &start_mutex);
cp_mutex_unlock(&start_mutex);
for (i = 0; i < count; i++)
{
sprintf(kbuf, "ENTRY %d", i);
entry = strdup(kbuf);
num = i % COUNT;
if (!silent)
printf("writing (%d): %s\n", num, entry);
cp_mutex_lock(&lock[i % COUNT]);
cp_hashtable_put(t[num], entry, entry);
cp_list_append(tl[num], entry);
cp_cond_broadcast(&cond[i % COUNT]);
cp_mutex_unlock(&lock[i % COUNT]);
}
return NULL;
}
int cp_pooled_thread_run_task(cp_pooled_thread *pt,
cp_thread_action action,
void *prm)
{
#ifdef __TRACE__
DEBUGMSG("cp_pooled_thread_run_task: action %lx, prm %lx\n",
(long) action, (long) prm);
#endif
pt->action = action;
pt->action_prm = prm;
if (action == NULL)
{
cp_error(CP_INVALID_FUNCTION_POINTER, "missing thread function");
return CP_INVALID_FUNCTION_POINTER;
}
/* signal thread to run */
cp_mutex_lock(pt->suspend_lock);
pt->wait = 0;
cp_cond_signal(pt->suspend_cond);
cp_mutex_unlock(pt->suspend_lock);
return 0;
}
cp_thread *cp_thread_pool_get_impl(cp_thread_pool *pool,
cp_thread_action action,
void *action_prm,
cp_thread_stop_fn stop_fn,
void *stop_prm,
int block)
{
cp_pooled_thread *pt = NULL;
cp_mutex_lock(pool->pool_lock);
#ifdef __TRACE__
DEBUGMSG("cp_thread_pool_get_impl (%d) pool size = %d max size = %d\n", block, pool->size, pool->max_size);
#endif
pt = cp_list_remove_head(pool->free_pool);
if (pt == NULL)
{
if (pool->size < pool->max_size)
{
pt = cp_pooled_thread_create(pool);
if (pt)
pool->size++;
}
if (pt == NULL) /* no thread available and poolsize == max */
{
if (!block) /* asked not to block, return NULL */
{
cp_mutex_unlock(pool->pool_lock);
return NULL;
}
/* wait for a thread to be released to the pool */
#ifdef _WINDOWS
cp_mutex_unlock(pool->pool_lock);
#endif
while (pool->running && cp_list_is_empty(pool->free_pool))
cp_cond_wait(pool->pool_cond, pool->pool_lock);
if (pool->running)
pt = cp_list_remove_head(pool->free_pool);
if (pt == NULL) /* shouldn't be happening except for shutdown */
{
cp_mutex_unlock(pool->pool_lock);
return NULL;
}
}
}
cp_hashlist_append(pool->in_use, &pt->id, pt);
cp_mutex_unlock(pool->pool_lock);
cp_pooled_thread_run_stoppable_task(pt, action, action_prm, stop_fn, stop_prm);
return pt->worker;
}
int cp_heap_lock(cp_heap *heap)
{
int rc;
if ((heap->mode & COLLECTION_MODE_NOSYNC)) return EINVAL;
if ((rc = cp_mutex_lock(heap->lock))) return rc;
heap->txowner = cp_thread_self();
heap->mode |= COLLECTION_MODE_IN_TRANSACTION;
return 0;
}
int cp_heap_txlock(cp_heap *heap)
{
if (heap->mode & COLLECTION_MODE_NOSYNC) return 0;
if (heap->mode & COLLECTION_MODE_IN_TRANSACTION)
{
cp_thread self = cp_thread_self();
if (cp_thread_equal(self, heap->txowner)) return 0;
}
errno = 0;
return cp_mutex_lock(heap->lock);
}
static int cp_thread_pool_set_available(cp_thread_pool *pool,
cp_pooled_thread *thread)
{
cp_mutex_lock(pool->pool_lock);
cp_hashlist_remove(pool->in_use, &thread->id);
cp_list_append(pool->free_pool, thread);
// pool->size--;
cp_cond_signal(pool->pool_cond);
cp_mutex_unlock(pool->pool_lock);
return 0;
}
int cp_thread_pool_wait(cp_thread_pool *pool)
{
while (cp_hashlist_item_count(pool->in_use) && pool->running)
{
cp_mutex_lock(pool->pool_lock);
cp_cond_wait(pool->pool_cond, pool->pool_lock);
if (pool->running &&
cp_hashlist_item_count(pool->in_use)) /* wake up someone else */
cp_cond_signal(pool->pool_cond);
cp_mutex_unlock(pool->pool_lock);
}
return 0;
}
void *cp_pooled_thread_run(void *prm)
{
cp_pooled_thread *pt = (cp_pooled_thread *) prm;
#ifdef __TRACE__
DEBUGMSG("cp_pooled_thread (%lx) starts", (long) pt);
#endif
while (!pt->done && pt->owner->running)
{
cp_mutex_lock(pt->suspend_lock);
while (pt->wait && (!pt->done) && pt->owner->running)
cp_cond_wait(pt->suspend_cond, pt->suspend_lock);
cp_mutex_unlock(pt->suspend_lock);
if (pt->done || !pt->owner->running) break;
#ifdef __TRACE__
DEBUGMSG("cp_pooled_thread_run: action is %lX, action_prm is %lX", pt->action, pt->action_prm);
#endif
if (pt->action) /* run user defined function if set */
{
#ifdef __TRACE__
DEBUGMSG("pooled thread (%lX) handles action (%lX)", (long) pt, (long) pt->action);
#endif
(*pt->action)(pt->action_prm);
}
if (pt->done || !pt->owner->running) break;
pt->wait = 1;
/* performed work, notify pool */
cp_thread_pool_set_available(pt->owner, pt);
}
#ifdef __TRACE__
DEBUGMSG("cp_pooled_thread (%lx) exits", (long) pt);
#endif
cp_pooled_thread_destroy(pt);
return NULL;
}
int cp_pooled_thread_stop(cp_pooled_thread *pt)
{
int rc = 0;
cp_mutex_lock(pt->suspend_lock);
pt->action = NULL;
if (pt->stop_fn)
{
rc = pt->stop_prm ? (*pt->stop_fn)(pt->stop_prm) :
(*pt->stop_fn)(pt->action_prm);
}
pt->done = 1;
pt->wait = 0;
cp_cond_signal(pt->suspend_cond);
cp_mutex_unlock(pt->suspend_lock);
// cp_thread_join(*pt->worker, NULL); //~~ rc
return rc;
}
int main(int argc, char *argv[])
{
int i;
cp_thread w[COUNT];
cp_thread r[COUNT];
long total;
int rc;
if (argc > 1) silent = atoi(argv[1]);
for (i = 0; i < COUNT; i++)
{
rc = cp_mutex_init(&lock[i], NULL);
cp_cond_init(&cond[i], NULL);
t[i] = cp_hashtable_create(10, cp_hash_string, cp_hash_compare_string);
tl[i] = cp_list_create();
}
rc = cp_mutex_init(&start_mutex, NULL);
cp_cond_init(&start_cond, NULL);
for (i = 0; i < COUNT; i++)
cp_thread_create(r[i], NULL, reader, (void *) i);
for (i = 0; i < COUNT; i++)
cp_thread_create(w[i], NULL, writer, (void *) INSERTS);
printf("press enter\n");
getchar();
cp_mutex_lock(&start_mutex);
running = 1;
total = time(NULL);
cp_cond_broadcast(&start_cond);
rc = cp_mutex_unlock(&start_mutex);
if (rc == 0) write_err("MAIN");
for (i = 0; i < COUNT; i++)
cp_thread_join(w[i], NULL);
running = 0;
for (i = 0; i < COUNT; i++)
{
cp_mutex_lock(&lock[i]);
cp_cond_broadcast(&cond[i]);
cp_mutex_unlock(&lock[i]);
cp_thread_join(r[i], NULL);
}
total = time(NULL) - total;
printf("\ndone in %ld seconds. tables should be empty now. press enter.\n",
total);
getchar();
for (i = 0; i < COUNT; i++)
{
printf("table %d: %ld items\n", i, cp_hashtable_count(t[i]));
cp_hashtable_destroy(t[i]);
printf("list %d: %ld items\n", i, cp_list_item_count(tl[i]));
while (cp_list_item_count(tl[i]))
{
char *leftover = cp_list_remove_head(tl[i]);
printf(" * %s\n", leftover);
}
cp_list_destroy(tl[i]);
}
printf("deleted them tables. press enter.\n");
getchar();
printf("bye.\n");
return 0;
}
