Move health into its own common/ static library

[lttng-tools.git] / src / bin / lttng-sessiond / health.h

diff --git a/src/bin/lttng-sessiond/health.h b/src/bin/lttng-sessiond/health.h
deleted file mode 100644 (file)
index 82cfc87..0000000
--- a/src/bin/lttng-sessiond/health.h
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License, version 2 only, as
- * published by the Free Software Foundation.
- *
- * 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., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#ifndef _HEALTH_H
-#define _HEALTH_H
-
-#include <assert.h>
-#include <time.h>
-#include <pthread.h>
-#include <urcu/tls-compat.h>
-#include <urcu/uatomic.h>
-#include <urcu/list.h>
-
-/*
- * These are the value added to the current state depending of the position in
- * the thread where is either waiting on a poll() or running in the code.
- */
-#define HEALTH_POLL_VALUE      (1UL << 0)
-#define HEALTH_CODE_VALUE      (1UL << 1)
-
-#define HEALTH_IS_IN_POLL(x)   ((x) & HEALTH_POLL_VALUE)
-
-struct health_app;
-
-enum health_flags {
-       HEALTH_ERROR                     = (1U << 0),
-};
-
-struct health_state {
-       /*
-        * last counter and last_time are only read and updated by the health_check
-        * thread (single updater).
-        */
-       unsigned long last;
-       struct timespec last_time;
-
-       /*
-        * current and flags are updated by multiple threads concurrently.
-        */
-       unsigned long current;          /* progress counter, updated atomically */
-       enum health_flags flags;        /* other flags, updated atomically */
-       int type;                       /* Indicates the nature of the thread. */
-       /* Node of the global TLS state list. */
-       struct cds_list_head node;
-};
-
-/* Declare TLS health state. */
-extern DECLARE_URCU_TLS(struct health_state, health_state);
-
-/*
- * Update current counter by 1 to indicate that the thread entered or left a
- * blocking state caused by a poll(). If the counter's value is not an even
- * number (meaning a code execution flow), an assert() is raised.
- */
-static inline void health_poll_entry(void)
-{
-       /* Code MUST be in code execution state which is an even number. */
-       assert(!(uatomic_read(&URCU_TLS(health_state).current)
-                               & HEALTH_POLL_VALUE));
-
-       uatomic_add(&URCU_TLS(health_state).current, HEALTH_POLL_VALUE);
-}
-
-/*
- * Update current counter by 1 indicating the exit of a poll or blocking call.
- * If the counter's value is not an odd number (a poll execution), an assert()
- * is raised.
- */
-static inline void health_poll_exit(void)
-{
-       /* Code MUST be in poll execution state which is an odd number. */
-       assert(uatomic_read(&URCU_TLS(health_state).current)
-                               & HEALTH_POLL_VALUE);
-
-       uatomic_add(&URCU_TLS(health_state).current, HEALTH_POLL_VALUE);
-}
-
-/*
- * Update current counter by 2 indicates progress in execution of a
- * thread.
- */
-static inline void health_code_update(void)
-{
-       uatomic_add(&URCU_TLS(health_state).current, HEALTH_CODE_VALUE);
-}
-
-/*
- * Set health "error" flag.
- */
-static inline void health_error(void)
-{
-       uatomic_or(&URCU_TLS(health_state).flags, HEALTH_ERROR);
-}
-
-struct health_app *health_app_create(int nr_types);
-void health_app_destroy(struct health_app *ha);
-int health_check_state(struct health_app *ha, int type);
-void health_register(struct health_app *ha, int type);
-void health_unregister(struct health_app *ha);
-void health_init(struct health_app *ha);
-
-#endif /* _HEALTH_H */