a3ad85e51b
- Use ucontext_t's to store KSE thread state. - Synthesize state for the UTS upon each upcall, rather than saving and copying a trapframe. - Save and restore FPU state properly in ucontext_t's. - Deliver signals to KSE-aware processes via upcall. - Rename kse mailbox structure fields to be more BSD-like. - Store the UTS's stack in struct proc in a stack_t. Reviewed by: bde, deischen, julian Approved by: -arch
85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
/*
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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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* $FreeBSD$
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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 <machine/kse.h>
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#include <sys/ucontext.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 UTS and the kernel.
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*/
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struct kse_mailbox;
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typedef void kse_fn_t(struct kse_mailbox *mbx);
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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 thread_mailbox {
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ucontext_t tm_context; /* User and machine context */
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unsigned int tm_flags; /* Thread flags */
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struct thread_mailbox *tm_next; /* Next thread in list */
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void *tm_udata; /* For use by the UTS */
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int tm_spare[8];
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};
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/*
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* KSE mailbox.
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*
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* Cummunication 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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struct thread_mailbox *km_curthread; /* Currently running thread */
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struct thread_mailbox *km_completed; /* Threads back from kernel */
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sigset_t km_sigscaught; /* Caught signals */
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unsigned int km_flags; /* KSE flags */
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void *km_func; /* UTS function */
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stack_t km_stack; /* UTS context */
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void *km_udata; /* For use by the UTS */
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int tm_spare[8];
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};
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#ifndef _KERNEL
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int kse_exit(void);
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int kse_wakeup(void);
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int kse_new(struct kse_mailbox *, int);
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int kse_yield(void);
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#endif
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#endif
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