1 files changed, 8 insertions, 12 deletions

diff --git a/src/solvers/h48/thread.h b/src/solvers/h48/thread.h
index 155bc6a..d035b52 100644
--- a/src/solvers/h48/thread.h
+++ b/src/solvers/h48/thread.h
@@ -11,11 +11,11 @@ typedef struct
         int front;
         int rear;
         int tasks_count;
-        int active;
+        atomic_int active;
         pthread_mutex_t mutex;
         pthread_cond_t cond;
         pthread_cond_t active_cond;
-        bool terminate;
+        atomic_bool terminate;
 } task_queue_t;
 
 STATIC void solve_h48_appendsolution_thread(dfsarg_solveh48_t *, task_queue_t *);
@@ -62,6 +62,7 @@ init_queue(task_queue_t *queue)
         queue->rear = 0;
         queue->tasks_count = 0;
         queue->active = 0;
+        queue->terminate = ATOMIC_VAR_INIT(false);
         pthread_mutex_init(&queue->mutex, NULL);
         pthread_cond_init(&queue->cond, NULL);
         pthread_cond_init(&queue->active_cond, NULL);
@@ -93,7 +94,7 @@ copy_queue(task_queue_t *src, task_queue_t *dest, int depth, int64_t *nsols)
         dest->front = src->front;
         dest->rear = src->rear;
         dest->tasks_count = src->tasks_count;
-        dest->active = src->active;
+        // atomic_init(&dest->active, &src->active);
         pthread_cond_broadcast(&dest->cond);
         pthread_mutex_unlock(&dest->mutex);
 }
@@ -121,14 +122,12 @@ start_thread(void *arg)
                         pthread_mutex_unlock(&queue->mutex);
                         
                         solve_h48_single(task, queue);
-                        
-                        pthread_mutex_lock(&queue->mutex);
-                        queue->active--;
+
+                        atomic_fetch_sub(&queue->active, 1);
 
                         if(queue->tasks_count == 0 && queue->active == 0)
                                 pthread_cond_signal(&queue->active_cond);
                 }
-                pthread_mutex_unlock(&queue->mutex);
         }
         return NULL;
 }
@@ -247,7 +246,7 @@ solve_h48_parent(
         const void *data,
         char *solutions)
 {
-        int64_t nsols;
+        int64_t nsols = 0;
         int p_depth = 0;
         dfsarg_solveh48_t bfs_arg;
         tableinfo_t info;
@@ -296,14 +295,11 @@ solve_h48_parent(
                 pthread_mutex_unlock(&nq.mutex);
         }
 
-        pthread_mutex_lock(&nq.mutex);
-        nq.terminate = true;
+        atomic_store(&nq.terminate, true);
         pthread_cond_broadcast(&nq.cond);
-        pthread_mutex_unlock(&nq.mutex);
 
         for (int i = 0; i < THREADS; i++){
                 pthread_join(threads[i], NULL);
         }
-        // fix memory release for multiple scrambles.
         return nsols;
 }