mirror of
https://kernel.googlesource.com/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-09-10 00:02:16 +08:00
Elizabeth Figura
5bc2479a35
This corresponds to the NT syscall NtCreateMutant(). An NT mutex is recursive, with a 32-bit recursion counter. When acquired via NtWaitForMultipleObjects(), the recursion counter is incremented by one. The OS records the thread which acquired it. The OS records the thread which acquired it. However, in order to keep this driver self-contained, the owning thread ID is managed by user-space, and passed as a parameter to all relevant ioctls. The initial owner and recursion count, if any, are specified when the mutex is created. Signed-off-by: Elizabeth Figura <zfigura@codeweavers.com> Link: https://lore.kernel.org/r/20241213193511.457338-6-zfigura@codeweavers.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
45 lines
949 B
C
45 lines
949 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Kernel support for NT synchronization primitive emulation
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*
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* Copyright (C) 2021-2022 Elizabeth Figura <zfigura@codeweavers.com>
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*/
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#ifndef __LINUX_NTSYNC_H
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#define __LINUX_NTSYNC_H
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#include <linux/types.h>
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struct ntsync_sem_args {
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__u32 count;
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__u32 max;
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};
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struct ntsync_mutex_args {
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__u32 owner;
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__u32 count;
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};
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#define NTSYNC_WAIT_REALTIME 0x1
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struct ntsync_wait_args {
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__u64 timeout;
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__u64 objs;
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__u32 count;
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__u32 index;
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__u32 flags;
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__u32 owner;
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__u32 pad[2];
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};
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#define NTSYNC_MAX_WAIT_COUNT 64
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#define NTSYNC_IOC_CREATE_SEM _IOW ('N', 0x80, struct ntsync_sem_args)
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#define NTSYNC_IOC_WAIT_ANY _IOWR('N', 0x82, struct ntsync_wait_args)
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#define NTSYNC_IOC_WAIT_ALL _IOWR('N', 0x83, struct ntsync_wait_args)
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#define NTSYNC_IOC_CREATE_MUTEX _IOW ('N', 0x84, struct ntsync_mutex_args)
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#define NTSYNC_IOC_SEM_RELEASE _IOWR('N', 0x81, __u32)
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#endif
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