1 files changed, 81 insertions, 0 deletions
diff --git a/src/irmd/irm_flow.c b/src/irmd/irm_flow.c
new file mode 100644
index 00000000..6531e4f6
--- /dev/null
+++ b/src/irmd/irm_flow.c
@@ -0,0 +1,81 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * The IPC Resource Manager - Flows
+ *
+ *    Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <ouroboros/config.h>
+
+#include "irm_flow.h"
+
+#include <stdlib.h>
+#include <stdbool.h>
+
+struct irm_flow * irm_flow_create()
+{
+        struct irm_flow * f = malloc(sizeof(*f));
+        if (f == NULL)
+                return NULL;
+
+        f->n_api   = -1;
+        f->n_1_api = -1;
+        f->port_id = -1;
+        f->state   = FLOW_NULL;
+
+        if (pthread_cond_init(&f->state_cond, NULL)) {
+                free(f);
+                return NULL;
+        }
+
+        if (pthread_mutex_init(&f->state_lock, NULL)) {
+                free(f);
+                return NULL;
+        }
+
+        f->t0.tv_sec  = 0;
+        f->t0.tv_nsec = 0;
+
+        return f;
+}
+
+void irm_flow_destroy(struct irm_flow * f)
+{
+        pthread_mutex_lock(&f->state_lock);
+
+        if (f->state == FLOW_PENDING)
+                f->state = FLOW_DESTROY;
+        else
+                f->state = FLOW_NULL;
+
+        pthread_cond_signal(&f->state_cond);
+        pthread_mutex_unlock(&f->state_lock);
+
+        pthread_cleanup_push((void (*)(void *)) pthread_mutex_unlock,
+                             (void *) &f->state_lock);
+
+        while (f->state != FLOW_NULL)
+                pthread_cond_wait(&f->state_cond, &f->state_lock);
+
+        pthread_cleanup_pop(true);
+
+        pthread_cond_destroy(&f->state_cond);
+        pthread_mutex_destroy(&f->state_lock);
+
+        free(f);
+}