src/common/consumer/consumer-timer.h

   1 /*
   2  * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
   3  * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
   5  *
   6  * SPDX-License-Identifier: GPL-2.0-only
   7  *
   8  */
   9
  10 #ifndef CONSUMER_TIMER_H
  11 #define CONSUMER_TIMER_H
  12
  13 #include <pthread.h>
  14
  15 #include "consumer.h"
  16
  17 #define LTTNG_CONSUMER_SIG_SWITCH       SIGRTMIN + 10
  18 #define LTTNG_CONSUMER_SIG_TEARDOWN     SIGRTMIN + 11
  19 #define LTTNG_CONSUMER_SIG_LIVE         SIGRTMIN + 12
  20 #define LTTNG_CONSUMER_SIG_MONITOR      SIGRTMIN + 13
  21 #define LTTNG_CONSUMER_SIG_EXIT         SIGRTMIN + 14
  22
  23 #define CLOCKID CLOCK_MONOTONIC
  24
  25 /*
  26  * Handle timer teardown race wrt memory free of private data by consumer
  27  * signals are handled by a single thread, which permits a synchronization
  28  * point between handling of each signal. Internal lock ensures mutual
  29  * exclusion.
  30  */
  31 struct timer_signal_data {
  32         pthread_t tid;  /* thread id managing signals */
  33         int setup_done;
  34         int qs_done;
  35         pthread_mutex_t lock;
  36 };
  37
  38 void consumer_timer_switch_start(struct lttng_consumer_channel *channel,
  39                 unsigned int switch_timer_interval_us);
  40 void consumer_timer_switch_stop(struct lttng_consumer_channel *channel);
  41 void consumer_timer_live_start(struct lttng_consumer_channel *channel,
  42                 unsigned int live_timer_interval_us);
  43 void consumer_timer_live_stop(struct lttng_consumer_channel *channel);
  44 int consumer_timer_monitor_start(struct lttng_consumer_channel *channel,
  45                 unsigned int monitor_timer_interval_us);
  46 int consumer_timer_monitor_stop(struct lttng_consumer_channel *channel);
  47 void *consumer_timer_thread(void *data);
  48 int consumer_signal_init(void);
  49
  50 int consumer_flush_kernel_index(struct lttng_consumer_stream *stream);
  51 int consumer_flush_ust_index(struct lttng_consumer_stream *stream);
  52
  53 int consumer_timer_thread_get_channel_monitor_pipe(void);
  54 int consumer_timer_thread_set_channel_monitor_pipe(int fd);
  55
  56 #endif /* CONSUMER_TIMER_H */