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| ccacf27f MD |
1 | #ifndef _URCU_WORKQUEUE_H |
| 2 | #define _URCU_WORKQUEUE_H | |
| 3 | ||
| 4 | /* | |
| 5 | * workqueue.h | |
| 6 | * | |
| 7 | * Userspace RCU header - Userspace workqueues | |
| 8 | * | |
| 9 | * Copyright (c) 2009,2017 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 10 | * Copyright (c) 2009 Paul E. McKenney, IBM Corporation. | |
| 11 | * | |
| 12 | * This library is free software; you can redistribute it and/or | |
| 13 | * modify it under the terms of the GNU Lesser General Public | |
| 14 | * License as published by the Free Software Foundation; either | |
| 15 | * version 2.1 of the License, or (at your option) any later version. | |
| 16 | * | |
| 17 | * This library is distributed in the hope that it will be useful, | |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 20 | * Lesser General Public License for more details. | |
| 21 | * | |
| 22 | * You should have received a copy of the GNU Lesser General Public | |
| 23 | * License along with this library; if not, write to the Free Software | |
| 24 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 25 | */ | |
| 26 | ||
| 27 | #include <stdlib.h> | |
| 28 | #include <pthread.h> | |
| 29 | ||
| 30 | #include <urcu/wfcqueue.h> | |
| 31 | ||
| 32 | #ifdef __cplusplus | |
| 33 | extern "C" { | |
| 34 | #endif | |
| 35 | ||
| 36 | /* Note that struct urcu_workqueue is opaque to callers. */ | |
| 37 | ||
| 38 | struct urcu_workqueue; | |
| 39 | struct urcu_workqueue_completion; | |
| 40 | ||
| 41 | /* Flag values. */ | |
| 42 | ||
| 43 | #define URCU_WORKQUEUE_RT (1U << 0) | |
| 44 | #define URCU_WORKQUEUE_STOP (1U << 1) | |
| 45 | #define URCU_WORKQUEUE_PAUSE (1U << 2) | |
| 46 | #define URCU_WORKQUEUE_PAUSED (1U << 3) | |
| 47 | ||
| 48 | /* | |
| 49 | * The urcu_work data structure is placed in the structure to be acted | |
| 50 | * upon via urcu_workqueue_queue_work(). | |
| 51 | */ | |
| 52 | ||
| 53 | struct urcu_work { | |
| 54 | struct cds_wfcq_node next; | |
| 55 | void (*func)(struct urcu_work *head); | |
| 56 | }; | |
| 57 | ||
| 58 | /* | |
| 59 | * Exported functions | |
| 60 | */ | |
| 61 | ||
| 62 | struct urcu_workqueue *urcu_workqueue_create(unsigned long flags, | |
| 63 | int cpu_affinity, void *priv, | |
| 64 | void (*grace_period_fct)(struct urcu_workqueue *workqueue, void *priv), | |
| 65 | void (*initialize_worker_fct)(struct urcu_workqueue *workqueue, void *priv), | |
| 66 | void (*finalize_worker_fct)(struct urcu_workqueue *workqueue, void *priv), | |
| 67 | void (*worker_before_wait_fct)(struct urcu_workqueue *workqueue, void *priv), | |
| 68 | void (*worker_after_wake_up_fct)(struct urcu_workqueue *workqueue, void *priv), | |
| 69 | void (*worker_before_pause_fct)(struct urcu_workqueue *workqueue, void *priv), | |
| 70 | void (*worker_after_resume_fct)(struct urcu_workqueue *workqueue, void *priv)); | |
| 71 | void urcu_workqueue_destroy(struct urcu_workqueue *workqueue); | |
| 72 | ||
| 73 | /* | |
| 74 | * Never fails. Should not be used to enqueue work from worker threads | |
| 75 | * after the application invokes urcu_workqueue_free. | |
| 76 | */ | |
| 77 | void urcu_workqueue_queue_work(struct urcu_workqueue *workqueue, | |
| 78 | struct urcu_work *work, | |
| 79 | void (*func)(struct urcu_work *work)); | |
| 80 | ||
| 81 | struct urcu_workqueue_completion *urcu_workqueue_create_completion(void); | |
| 82 | void urcu_workqueue_destroy_completion(struct urcu_workqueue_completion *completion); | |
| 83 | ||
| 84 | void urcu_workqueue_queue_completion(struct urcu_workqueue *workqueue, | |
| 85 | struct urcu_workqueue_completion *completion); | |
| 86 | void urcu_workqueue_wait_completion(struct urcu_workqueue_completion *completion); | |
| 87 | ||
| 88 | void urcu_workqueue_flush_queued_work(struct urcu_workqueue *workqueue); | |
| 89 | ||
| 90 | /* | |
| 91 | * pause/resume/create worker threads. Can be used to pause worker | |
| 92 | * threads across fork/clone while keeping the workqueue in place. | |
| 93 | * Pause is used in parent pre-fork, resume in parent post-fork, create | |
| 94 | * in child after-fork. | |
| 95 | */ | |
| 96 | void urcu_workqueue_pause_worker(struct urcu_workqueue *workqueue); | |
| 97 | void urcu_workqueue_resume_worker(struct urcu_workqueue *workqueue); | |
| 98 | void urcu_workqueue_create_worker(struct urcu_workqueue *workqueue); | |
| 99 | ||
| 100 | #ifdef __cplusplus | |
| 101 | } | |
| 102 | #endif | |
| 103 | ||
| 104 | #endif /* _URCU_WORKQUEUE_H */ |