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