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authordimitri staessens <dimitri.staessens@intec.ugent.be>2016-08-08 21:15:57 +0200
committerdimitri staessens <dimitri.staessens@intec.ugent.be>2016-08-08 21:15:57 +0200
commit18e440197cae6d537765a4de6a915f074dce4de5 (patch)
tree5f55b8d82826fc182c9408350200b7ecaa932a27 /src/irmd/reg_api.c
parentc2b7a0bf9978091c9a51b72fdbd94cc9286041df (diff)
downloadouroboros-18e440197cae6d537765a4de6a915f074dce4de5.tar.gz
ouroboros-18e440197cae6d537765a4de6a915f074dce4de5.zip
irmd: Refactor and bugfixes
Refactors the IRMd to extract reg_api and irm_flow structures to their own sources. Fixes some locking bugs.
Diffstat (limited to 'src/irmd/reg_api.c')
-rw-r--r--src/irmd/reg_api.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/src/irmd/reg_api.c b/src/irmd/reg_api.c
new file mode 100644
index 00000000..e2da1244
--- /dev/null
+++ b/src/irmd/reg_api.c
@@ -0,0 +1,120 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * The IPC Resource Manager - Registered Application Instances
+ *
+ * Dimitri Staessens <dimitri.staessens@intec.ugent.be>
+ * Sander Vrijders <sander.vrijders@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 "reg_api.h"
+
+#include <stdlib.h>
+#include <stdbool.h>
+
+struct reg_api * reg_api_create(pid_t api)
+{
+ struct reg_api * i;
+ i = malloc(sizeof(*i));
+ if (i == NULL)
+ return NULL;
+
+ i->api = api;
+ i->state = REG_I_INIT;
+
+ pthread_mutex_init(&i->state_lock, NULL);
+ pthread_cond_init(&i->state_cond, NULL);
+
+ INIT_LIST_HEAD(&i->next);
+
+ return i;
+}
+
+void reg_api_destroy(struct reg_api * i)
+{
+ if (i == NULL)
+ return;
+
+ pthread_mutex_lock(&i->state_lock);
+
+ if (i->state != REG_I_NULL)
+ i->state = REG_I_DESTROY;
+
+ pthread_cond_signal(&i->state_cond);
+
+ pthread_mutex_unlock(&i->state_lock);
+
+ pthread_cleanup_push((void(*)(void *)) pthread_mutex_unlock,
+ (void *) &i->state_lock);
+
+ while (i->state != REG_I_NULL)
+ pthread_cond_wait(&i->state_cond, &i->state_lock);
+
+ pthread_cleanup_pop(true);
+
+ pthread_cond_destroy(&i->state_cond);
+ pthread_mutex_destroy(&i->state_lock);
+
+ free(i);
+}
+
+static void cleanup_sleeper(void * o) {
+ struct reg_api * i = (struct reg_api *) o;
+ i->state = REG_I_NULL;
+ pthread_cond_signal(&i->state_cond);
+ pthread_mutex_unlock(&i->state_lock);
+}
+
+void reg_api_sleep(struct reg_api * i)
+{
+ if (i == NULL)
+ return;
+
+ pthread_mutex_lock(&i->state_lock);
+ if (i->state != REG_I_INIT) {
+ pthread_mutex_unlock(&i->state_lock);
+ return;
+ }
+
+ i->state = REG_I_SLEEP;
+
+ pthread_cleanup_push(cleanup_sleeper, (void *) i);
+
+ while (i->state == REG_I_SLEEP)
+ pthread_cond_wait(&i->state_cond, &i->state_lock);
+
+ pthread_cleanup_pop(true);
+}
+
+void reg_api_wake(struct reg_api * i)
+{
+ pthread_mutex_lock(&i->state_lock);
+
+ if (i->state == REG_I_NULL) {
+ pthread_mutex_unlock(&i->state_lock);
+ return;
+ }
+
+ i->state = REG_I_WAKE;
+
+ pthread_cond_broadcast(&i->state_cond);
+
+ while (i->state == REG_I_WAKE)
+ pthread_cond_wait(&i->state_cond, &i->state_lock);
+
+ pthread_mutex_unlock(&i->state_lock);
+}