2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2018, Matthew Macy <mmacy@freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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33 struct epoch_context {
35 } __aligned(sizeof(void *));
37 typedef struct epoch_context *epoch_context_t;
45 typedef struct epoch *epoch_t;
47 #define EPOCH_PREEMPT 0x1
48 #define EPOCH_LOCKED 0x2
50 extern epoch_t global_epoch;
51 extern epoch_t global_epoch_preempt;
53 struct epoch_tracker {
54 TAILQ_ENTRY(epoch_tracker) et_link;
56 ck_epoch_section_t et_section;
58 struct epoch *et_epoch;
59 SLIST_ENTRY(epoch_tracker) et_tlink;
63 } __aligned(sizeof(void *));
64 typedef struct epoch_tracker *epoch_tracker_t;
66 epoch_t epoch_alloc(const char *name, int flags);
67 void epoch_free(epoch_t epoch);
68 void epoch_wait(epoch_t epoch);
69 void epoch_wait_preempt(epoch_t epoch);
70 void epoch_drain_callbacks(epoch_t epoch);
71 void epoch_call(epoch_t epoch, epoch_context_t ctx, void (*callback) (epoch_context_t));
72 int in_epoch(epoch_t epoch);
73 int in_epoch_verbose(epoch_t epoch, int dump_onfail);
74 DPCPU_DECLARE(int, epoch_cb_count);
75 DPCPU_DECLARE(struct grouptask, epoch_cb_task);
78 #define EPOCH_FILE_LINE , const char *file, int line
80 #define EPOCH_FILE_LINE
83 void _epoch_enter_preempt(epoch_t epoch, epoch_tracker_t et EPOCH_FILE_LINE);
84 void _epoch_exit_preempt(epoch_t epoch, epoch_tracker_t et EPOCH_FILE_LINE);
86 void epoch_trace_list(struct thread *);
87 #define epoch_enter_preempt(epoch, et) _epoch_enter_preempt(epoch, et, __FILE__, __LINE__)
88 #define epoch_exit_preempt(epoch, et) _epoch_exit_preempt(epoch, et, __FILE__, __LINE__)
90 #define epoch_enter_preempt(epoch, et) _epoch_enter_preempt(epoch, et)
91 #define epoch_exit_preempt(epoch, et) _epoch_exit_preempt(epoch, et)
93 void epoch_enter(epoch_t epoch);
94 void epoch_exit(epoch_t epoch);
96 void epoch_thread_init(struct thread *);
97 void epoch_thread_fini(struct thread *);
100 #endif /* _SYS_EPOCH_H_ */