projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| 287a512f | 1 | /* |
| ab5be9fa MJ |
2 | * Copyright (C) 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 3 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
| 287a512f | 4 | * |
| ab5be9fa | 5 | * SPDX-License-Identifier: LGPL-2.1-only |
| 287a512f JG |
6 | * |
| 7 | * This code is originally adapted from userspace-rcu's urcu-wait.h | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef LTTNG_WAITER_H | |
| 11 | #define LTTNG_WAITER_H | |
| 12 | ||
| 13 | #define _LGPL_SOURCE | |
| 14 | ||
| 15 | #include <stdint.h> | |
| 16 | #include <urcu/wfstack.h> | |
| 17 | #include <stdbool.h> | |
| 18 | #include "macros.h" | |
| 19 | ||
| 7966af57 SM |
20 | #ifdef __cplusplus |
| 21 | extern "C" { | |
| 22 | #endif | |
| 23 | ||
| 287a512f JG |
24 | struct lttng_waiter { |
| 25 | struct cds_wfs_node wait_queue_node; | |
| 26 | int32_t state; | |
| 27 | }; | |
| 28 | ||
| 287a512f JG |
29 | void lttng_waiter_init(struct lttng_waiter *waiter); |
| 30 | ||
| 287a512f JG |
31 | void lttng_waiter_wait(struct lttng_waiter *waiter); |
| 32 | ||
| 33 | /* | |
| 34 | * lttng_waiter_wake_up must only be called by a single waker. | |
| 35 | * It is invalid for multiple "wake" operations to be invoked | |
| 36 | * on a single waiter without re-initializing it before. | |
| 37 | */ | |
| 287a512f JG |
38 | void lttng_waiter_wake_up(struct lttng_waiter *waiter); |
| 39 | ||
| 7966af57 SM |
40 | #ifdef __cplusplus |
| 41 | } | |
| 42 | #endif | |
| 43 | ||
| 287a512f | 44 | #endif /* LTTNG_WAITER_H */ |