+/*
+ * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ *
+ * 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; only version 2
+ * of the License.
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef _TRACEABLE_APP_H
+#define _TRACEABLE_APP_H
+
+#include <stdint.h>
+#include <urcu/list.h>
+
+#include "trace-ust.h"
+
+/*
+ * Application registration data structure.
+ */
+struct ust_register_msg {
+ uint32_t major;
+ uint32_t minor;
+ pid_t pid;
+ pid_t ppid;
+ uid_t uid;
+ gid_t gid;
+ char name[16];
+};
+
+/*
+ * Traceable application list.
+ */
+struct ust_app_list{
+ /*
+ * This lock protects any read/write access to the list and count (which is
+ * basically the list size). All public functions in traceable-app.c
+ * acquire this lock and release it before returning. If none of those
+ * functions are used, the lock MUST be acquired in order to iterate or/and
+ * do any actions on that list.
+ */
+ pthread_mutex_t lock;
+
+ /*
+ * Number of element in the list. The session list lock MUST be acquired if
+ * this counter is used when iterating over the session list.
+ */
+ unsigned int count;
+
+ /* Linked list head */
+ struct cds_list_head head;
+};
+
+/* Registered traceable applications. Libust registers to the session daemon
+ * and a linked list is kept of all running traceable app.
+ */
+struct ust_app {
+ int sock; /* Communication socket with the application */
+ pid_t pid;
+ pid_t ppid;
+ uid_t uid; /* User ID that owns the apps */
+ gid_t gid; /* Group ID that owns the apps */
+ uint32_t v_major; /* Verion major number */
+ uint32_t v_minor; /* Verion minor number */
+ char name[17]; /* Process name (short) */
+ struct ltt_ust_channel_list channels;
+ struct cds_list_head list;
+};
+
+int ust_app_register(struct ust_register_msg *msg, int sock);
+void ust_app_unregister(int sock);
+unsigned int ust_app_list_count(void);
+
+void ust_app_lock_list(void);
+void ust_app_unlock_list(void);
+void ust_app_clean_list(void);
+struct ust_app_list *ust_app_get_list(void);
+struct ust_app *ust_app_get_by_pid(pid_t pid);
+
+#endif /* _TRACEABLE_APP_H */