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Diffstat (limited to 'sys/dev/raidframe/rf_threadstuff.h')
| -rw-r--r-- | sys/dev/raidframe/rf_threadstuff.h | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/sys/dev/raidframe/rf_threadstuff.h b/sys/dev/raidframe/rf_threadstuff.h new file mode 100644 index 0000000..f7e81ff --- /dev/null +++ b/sys/dev/raidframe/rf_threadstuff.h @@ -0,0 +1,229 @@ +/* $FreeBSD$ */ +/* $NetBSD: rf_threadstuff.h,v 1.10 2001/01/27 20:42:21 oster Exp $ */ +/* + * Copyright (c) 1995 Carnegie-Mellon University. + * All rights reserved. + * + * Author: Mark Holland, Daniel Stodolsky, Jim Zelenka + * + * 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 the + * rights to redistribute these changes. + */ + +/* + * threadstuff.h -- definitions for threads, locks, and synchronization + * + * The purpose of this file is provide some illusion of portability. + * If the functions below can be implemented with the same semantics on + * some new system, then at least the synchronization and thread control + * part of the code should not require modification to port to a new machine. + * the only other place where the pthread package is explicitly used is + * threadid.h + * + * this file should be included above stdio.h to get some necessary defines. + * + */ + +#ifndef _RF__RF_THREADSTUFF_H_ +#define _RF__RF_THREADSTUFF_H_ + +#include <dev/raidframe/rf_types.h> +#include <sys/types.h> +#include <sys/param.h> +#ifdef _KERNEL +#include <sys/systm.h> +#include <sys/proc.h> +#include <sys/kthread.h> +#endif + +#define rf_create_managed_mutex(a,b) _rf_create_managed_mutex(a,b,__FILE__,__LINE__) +#define rf_create_managed_cond(a,b) _rf_create_managed_cond(a,b,__FILE__,__LINE__) +#define rf_init_managed_threadgroup(a,b) _rf_init_managed_threadgroup(a,b,__FILE__,__LINE__) +#define rf_init_threadgroup(a) _rf_init_threadgroup(a,__FILE__,__LINE__) +#define rf_destroy_threadgroup(a) _rf_destroy_threadgroup(a,__FILE__,__LINE__) + +int _rf_init_threadgroup(RF_ThreadGroup_t * g, char *file, int line); +int _rf_destroy_threadgroup(RF_ThreadGroup_t * g, char *file, int line); +int +_rf_init_managed_threadgroup(RF_ShutdownList_t ** listp, + RF_ThreadGroup_t * g, char *file, int line); + +#include <sys/lock.h> +#if defined(__FreeBSD__ ) && __FreeBSD_version > 500005 +#include <sys/mutex.h> +#define decl_simple_lock_data(a,b) a struct mtx b; +#define simple_lock_addr(a) ((struct mtx *)&(a)) + +typedef struct thread *RF_Thread_t; +typedef void *RF_ThreadArg_t; + +#ifdef _KERNEL +static __inline struct ucred * +rf_getucred(RF_Thread_t td) +{ + return (((struct thread *)td)->td_proc->p_ucred); +} +#endif + +#define RF_LOCK_MUTEX(_m_) mtx_lock(&(_m_)) +#define RF_UNLOCK_MUTEX(_m_) mtx_unlock(&(_m_)) +#else +#define decl_simple_lock_data(a,b) a struct simplelock b; +#define simple_lock_addr(a) ((struct simplelock *)&(a)) + +typedef struct proc *RF_Thread_t; +typedef void *RF_ThreadArg_t; + +static __inline struct ucred * +rf_getucred(RF_Thread_t td) +{ + return (((struct proc *)td)->p_ucred); +} + +#define RF_LOCK_MUTEX(_m_) simple_lock(&(_m_)) +#define RF_UNLOCK_MUTEX(_m_) simple_unlock(&(_m_)) +#endif + +#define RF_DECLARE_MUTEX(_m_) decl_simple_lock_data(,(_m_)) +#define RF_DECLARE_STATIC_MUTEX(_m_) decl_simple_lock_data(static,(_m_)) +#define RF_DECLARE_EXTERN_MUTEX(_m_) decl_simple_lock_data(extern,(_m_)) + +#define RF_DECLARE_COND(_c_) int _c_; +#define RF_DECLARE_STATIC_COND(_c_) static int _c_; +#define RF_DECLARE_EXTERN_COND(_c_) extern int _c_; + +/* + * In NetBSD, kernel threads are simply processes which share several + * substructures and never run in userspace. + */ +#define RF_WAIT_COND(_c_,_m_) \ + RF_LTSLEEP(&(_c_), PRIBIO, "rfwcond", 0, &(_m_)) +#define RF_SIGNAL_COND(_c_) wakeup_one(&(_c_)) +#define RF_BROADCAST_COND(_c_) wakeup(&(_c_)) +#if defined(__NetBSD__) +#define RF_CREATE_THREAD(_handle_, _func_, _arg_, _name_) \ + kthread_create1((void (*)(void *))(_func_), (void *)(_arg_), \ + (struct proc **)&(_handle_), _name_) +#define RF_THREAD_EXIT(ret) \ + kthread_exit(ret) +#elif defined(__FreeBSD__) +#if __FreeBSD_version > 500005 +#define RF_CREATE_THREAD(_handle_, _func_, _arg_, _name_) \ + kthread_create((void (*)(void *))(_func_), (void *)(_arg_), \ + (struct proc **)&(_handle_), 0, 4, _name_) +#define RF_THREAD_EXIT(ret) \ + kthread_exit(ret) +#else +#define RF_CREATE_THREAD(_handle_, _func_, _arg_, _name_) \ + kthread_create((void (*)(void *))(_func_), (void *)(_arg_), \ + (struct proc **)&(_handle_), _name_) +#define RF_THREAD_EXIT(ret) \ + kthread_exit(ret); +#endif +#endif + +struct RF_ThreadGroup_s { + int created; + int running; + int shutdown; + RF_DECLARE_MUTEX(mutex) + RF_DECLARE_COND(cond) +}; +/* + * Someone has started a thread in the group + */ +#define RF_THREADGROUP_STARTED(_g_) { \ + RF_LOCK_MUTEX((_g_)->mutex); \ + (_g_)->created++; \ + RF_UNLOCK_MUTEX((_g_)->mutex); \ +} + +/* + * Thread announcing that it is now running + */ +#define RF_THREADGROUP_RUNNING(_g_) { \ + RF_LOCK_MUTEX((_g_)->mutex); \ + (_g_)->running++; \ + RF_UNLOCK_MUTEX((_g_)->mutex); \ + RF_SIGNAL_COND((_g_)->cond); \ +} + +/* + * Thread announcing that it is now done + */ +#define RF_THREADGROUP_DONE(_g_) { \ + RF_LOCK_MUTEX((_g_)->mutex); \ + (_g_)->shutdown++; \ + RF_UNLOCK_MUTEX((_g_)->mutex); \ + RF_SIGNAL_COND((_g_)->cond); \ +} + +/* + * Wait for all threads to start running + */ +#define RF_THREADGROUP_WAIT_START(_g_) { \ + RF_LOCK_MUTEX((_g_)->mutex); \ + while((_g_)->running < (_g_)->created) { \ + RF_WAIT_COND((_g_)->cond, (_g_)->mutex); \ + } \ + RF_UNLOCK_MUTEX((_g_)->mutex); \ +} + +/* + * Wait for all threads to stop running + */ +#ifndef __NetBSD__ +#define RF_THREADGROUP_WAIT_STOP(_g_) { \ + RF_LOCK_MUTEX((_g_)->mutex); \ + RF_ASSERT((_g_)->running == (_g_)->created); \ + while((_g_)->shutdown < (_g_)->running) { \ + RF_WAIT_COND((_g_)->cond, (_g_)->mutex); \ + } \ + RF_UNLOCK_MUTEX((_g_)->mutex); \ +} +#else + /* XXX Note that we've removed the assert. That should get put back in once + * we actually get something like a kernel thread running */ +#define RF_THREADGROUP_WAIT_STOP(_g_) { \ + RF_LOCK_MUTEX((_g_)->mutex); \ + while((_g_)->shutdown < (_g_)->running) { \ + RF_WAIT_COND((_g_)->cond, (_g_)->mutex); \ + } \ + RF_UNLOCK_MUTEX((_g_)->mutex); \ +} +#endif + +#if defined(__FreeBSD__) && __FreeBSD_version > 500005 +int rf_mutex_init(struct mtx *, const char *); +int rf_mutex_destroy(struct mtx *); +int _rf_create_managed_mutex(RF_ShutdownList_t **, struct mtx *, + char *, int); +#else +int rf_mutex_init(struct simplelock *, const char *); +int rf_mutex_destroy(struct simplelock *); +int _rf_create_managed_mutex(RF_ShutdownList_t **, struct simplelock *, + char *, int); +#endif +int _rf_create_managed_cond(RF_ShutdownList_t ** listp, int *, + char *file, int line); + +int rf_cond_init(int *c); +int rf_cond_destroy(int *c); +#endif /* !_RF__RF_THREADSTUFF_H_ */ |
