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 #ifdef __cplusplus
  18 extern "C" {
  19 #endif
  20
  21 #define LTTNG_CONSUMER_SIG_SWITCH       SIGRTMIN + 10
  22 #define LTTNG_CONSUMER_SIG_TEARDOWN     SIGRTMIN + 11
  23 #define LTTNG_CONSUMER_SIG_LIVE         SIGRTMIN + 12
  24 #define LTTNG_CONSUMER_SIG_MONITOR      SIGRTMIN + 13
  25 #define LTTNG_CONSUMER_SIG_EXIT         SIGRTMIN + 14
  26
  27 #define CLOCKID CLOCK_MONOTONIC
  28
  29 /*
  30  * Handle timer teardown race wrt memory free of private data by consumer
  31  * signals are handled by a single thread, which permits a synchronization
  32  * point between handling of each signal. Internal lock ensures mutual
  33  * exclusion.
  34  */
  35 struct timer_signal_data {
  36         pthread_t tid;  /* thread id managing signals */
  37         int setup_done;
  38         int qs_done;
  39         pthread_mutex_t lock;
  40 };
  41
  42 void consumer_timer_switch_start(struct lttng_consumer_channel *channel,
  43                 unsigned int switch_timer_interval_us);
  44 void consumer_timer_switch_stop(struct lttng_consumer_channel *channel);
  45 void consumer_timer_live_start(struct lttng_consumer_channel *channel,
  46                 unsigned int live_timer_interval_us);
  47 void consumer_timer_live_stop(struct lttng_consumer_channel *channel);
  48 int consumer_timer_monitor_start(struct lttng_consumer_channel *channel,
  49                 unsigned int monitor_timer_interval_us);
  50 int consumer_timer_monitor_stop(struct lttng_consumer_channel *channel);
  51 void *consumer_timer_thread(void *data);
  52 int consumer_signal_init(void);
  53
  54 int consumer_flush_kernel_index(struct lttng_consumer_stream *stream);
  55 int consumer_flush_ust_index(struct lttng_consumer_stream *stream);
  56
  57 int consumer_timer_thread_get_channel_monitor_pipe(void);
  58 int consumer_timer_thread_set_channel_monitor_pipe(int fd);
  59
  60 #ifdef __cplusplus
  61 }
  62 #endif
  63
  64 #endif /* CONSUMER_TIMER_H */