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136 lines
4.3 KiB
C
136 lines
4.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (C) 2001 Julian Elischer <julian@freebsd.org>
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* for the FreeBSD Foundation.
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice(s), this list of conditions and the following disclaimer as
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* the first lines of this file unmodified other than the possible
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* addition of one or more copyright notices.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice(s), this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*/
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#ifndef _SYS_KSE_H_
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#define _SYS_KSE_H_
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#include <sys/ucontext.h>
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#include <sys/time.h>
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#include <sys/signal.h>
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/*
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* This file defines the structures needed for communication between
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* the userland and the kernel when running a KSE-based threading system.
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* The only programs that should see this file are the user thread
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* scheduler (UTS) and the kernel.
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*/
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struct kse_mailbox;
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typedef void kse_func_t(struct kse_mailbox *);
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/*
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* Thread mailbox.
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*
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* This describes a user thread to the kernel scheduler.
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*/
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struct kse_thr_mailbox {
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ucontext_t tm_context; /* User and machine context */
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uint32_t tm_flags; /* Thread flags */
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struct kse_thr_mailbox *tm_next; /* Next thread in list */
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void *tm_udata; /* For use by the UTS */
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uint32_t tm_uticks; /* Time in userland */
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uint32_t tm_sticks; /* Time in kernel */
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siginfo_t tm_syncsig;
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uint32_t tm_dflags; /* Debug flags */
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lwpid_t tm_lwp; /* kernel thread UTS runs on */
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uint32_t __spare__[6];
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};
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/*
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* KSE mailbox.
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*
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* Communication path between the UTS and the kernel scheduler specific to
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* a single KSE.
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*/
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struct kse_mailbox {
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uint32_t km_version; /* Mailbox version */
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struct kse_thr_mailbox *km_curthread; /* Currently running thread */
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struct kse_thr_mailbox *km_completed; /* Threads back from kernel */
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sigset_t km_sigscaught; /* Caught signals */
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uint32_t km_flags; /* Mailbox flags */
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kse_func_t *km_func; /* UTS function */
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stack_t km_stack; /* UTS stack */
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void *km_udata; /* For use by the UTS */
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struct timespec km_timeofday; /* Time of day */
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uint32_t km_quantum; /* Upcall quantum in msecs */
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lwpid_t km_lwp; /* kernel thread UTS runs on */
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uint32_t __spare2__[7];
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};
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#define KSE_VER_0 0
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#define KSE_VERSION KSE_VER_0
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/* These flags are kept in km_flags */
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#define KMF_NOUPCALL 0x01
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#define KMF_NOCOMPLETED 0x02
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#define KMF_DONE 0x04
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#define KMF_BOUND 0x08
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#define KMF_WAITSIGEVENT 0x10
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/* These flags are kept in tm_flags */
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#define TMF_NOUPCALL 0x01
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/* These flags are kept in tm_dlfags */
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#define TMDF_SSTEP 0x01
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#define TMDF_SUSPEND 0x02
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/* Flags for kse_switchin */
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#define KSE_SWITCHIN_SETTMBX 0x01
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/* Commands for kse_thr_interrupt */
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#define KSE_INTR_INTERRUPT 1
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#define KSE_INTR_RESTART 2
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#define KSE_INTR_SENDSIG 3
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#define KSE_INTR_SIGEXIT 4
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#define KSE_INTR_DBSUSPEND 5
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#define KSE_INTR_EXECVE 6
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struct kse_execve_args {
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sigset_t sigmask;
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sigset_t sigpend;
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char *path;
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char **argv;
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char **envp;
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void *reserved;
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};
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#ifndef _KERNEL
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int kse_create(struct kse_mailbox *, int);
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int kse_exit(void);
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int kse_release(struct timespec *);
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int kse_thr_interrupt(struct kse_thr_mailbox *, int, long);
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int kse_wakeup(struct kse_mailbox *);
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int kse_switchin(struct kse_thr_mailbox *, int flags);
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#endif /* !_KERNEL */
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#endif /* !_SYS_KSE_H_ */
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