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| author | Pasha <pasha@member.fsf.org> | 2024-02-20 18:49:50 +0000 |
|---|---|---|
| committer | Pasha <pasha@member.fsf.org> | 2024-02-20 18:49:50 +0000 |
| commit | 5e0b8d508ed51004bd836384293be00950ee62c9 (patch) | |
| tree | e3f16b1aa8b7177032ce3ec429fbad2b1d92a876 /kern/eventcount.h | |
| download | gnumach-riscv-5e0b8d508ed51004bd836384293be00950ee62c9.tar.gz gnumach-riscv-5e0b8d508ed51004bd836384293be00950ee62c9.tar.bz2 | |
init gnumach copy
Diffstat (limited to 'kern/eventcount.h')
| -rw-r--r-- | kern/eventcount.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/kern/eventcount.h b/kern/eventcount.h new file mode 100644 index 0000000..598d7e0 --- /dev/null +++ b/kern/eventcount.h @@ -0,0 +1,66 @@ +/* + * Mach Operating System + * Copyright (c) 1993-1987 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * File: eventcount.c + * Author: Alessandro Forin + * Date: 10/91 + * + * Eventcounters, for user-level drivers synchronization + * + */ + +#ifndef _KERN_EVENTCOUNT_H_ +#define _KERN_EVENTCOUNT_H_ 1 + +#include <kern/lock.h> + +/* kernel visible only */ + +typedef struct evc { + int count; + thread_t waiting_thread; + natural_t ev_id; + struct evc *sanity; + decl_simple_lock_data(, lock) +} *evc_t; + +extern void evc_init(evc_t ev), + evc_destroy(evc_t ev), + evc_signal(evc_t ev), + evc_notify_abort(thread_t thread); + +/* kernel and user visible */ + +extern kern_return_t evc_wait(natural_t ev_id); +extern kern_return_t evc_wait_clear(natural_t ev_id); + +#if NCPUS <= 1 +void simpler_thread_setrun( + thread_t th, + boolean_t may_preempt); +#endif + +#endif /* _KERN_EVENTCOUNT_H_ */ |