#ifndef _HEALTH_H
#define _HEALTH_H
-#include <stdint.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
#define HEALTH_IS_IN_POLL(x) ((x) & HEALTH_POLL_VALUE)
enum health_flags {
- HEALTH_EXIT = (1U << 0),
- HEALTH_ERROR = (1U << 1),
+ HEALTH_ERROR = (1U << 0),
+};
+
+enum health_type {
+ HEALTH_TYPE_CMD = 0,
+ HEALTH_TYPE_APP_MANAGE = 1,
+ HEALTH_TYPE_APP_REG = 2,
+ HEALTH_TYPE_KERNEL = 3,
+ HEALTH_TYPE_CONSUMER = 4,
+
+ HEALTH_NUM_TYPE,
+};
+
+struct health_tls_state_list {
+ struct cds_list_head head;
};
struct health_state {
/*
- * last counter is only read and updated by the health_check
+ * 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 */
+ enum health_type type; /* Indicates the nature of the thread. */
+ /* Node of the global TLS state list. */
+ struct cds_list_head node;
};
-/* Health state counters for the client command thread */
-extern struct health_state health_thread_cmd;
-
-/* Health state counters for the application management thread */
-extern struct health_state health_thread_app_manage;
-
-/* Health state counters for the application registration thread */
-extern struct health_state health_thread_app_reg;
-
-/* Health state counters for the kernel thread */
-extern struct health_state health_thread_kernel;
+/* 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().
+ * 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_update(struct health_state *state)
+static inline void health_poll_entry(void)
{
- assert(state);
- uatomic_add(&state->current, HEALTH_POLL_VALUE);
-}
+ /* Code MUST be in code execution state which is an even number. */
+ assert(!(uatomic_read(&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(struct health_state *state)
-{
- assert(state);
- uatomic_add(&state->current, HEALTH_CODE_VALUE);
+ uatomic_add(&URCU_TLS(health_state).current, HEALTH_POLL_VALUE);
}
/*
- * Set health "exit" flag.
+ * 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_exit(struct health_state *state)
+static inline void health_poll_exit(void)
{
- assert(state);
- uatomic_or(&state->flags, HEALTH_EXIT);
+ /* 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);
}
/*
- * Set health "error" flag.
+ * Update current counter by 2 indicates progress in execution of a
+ * thread.
*/
-static inline void health_error(struct health_state *state)
+static inline void health_code_update(void)
{
- assert(state);
- uatomic_or(&state->flags, HEALTH_ERROR);
+ uatomic_add(&URCU_TLS(health_state).current, HEALTH_CODE_VALUE);
}
/*
- * Init health state.
+ * Set health "error" flag.
*/
-static inline void health_init(struct health_state *state)
+static inline void health_error(void)
{
- assert(state);
- uatomic_set(&state->last, 0);
- uatomic_set(&state->current, 0);
- uatomic_set(&state->flags, 0);
+ uatomic_or(&URCU_TLS(health_state).flags, HEALTH_ERROR);
}
-int health_check_state(struct health_state *state);
+int health_check_state(enum health_type type);
+void health_register(enum health_type type);
+void health_unregister(void);
#endif /* _HEALTH_H */