Move rtems/freebsd to freebsd and contrib to freebsd/contrib

1 files changed, 242 insertions, 0 deletions

diff --git a/freebsd/sys/eventhandler.h b/freebsd/sys/eventhandler.h
new file mode 100644
index 00000000..d591fe9b
--- /dev/null
+++ b/freebsd/sys/eventhandler.h
@@ -0,0 +1,242 @@
+/*-
+ * Copyright (c) 1999 Michael Smith <msmith@freebsd.org>
+ * 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, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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_EVENTHANDLER_H
+#define SYS_EVENTHANDLER_H
+
+#include <rtems/freebsd/sys/lock.h>
+#include <rtems/freebsd/sys/ktr.h>
+#include <rtems/freebsd/sys/mutex.h>
+#include <rtems/freebsd/sys/queue.h>
+
+struct eventhandler_entry {
+	TAILQ_ENTRY(eventhandler_entry)	ee_link;
+	int				ee_priority;
+#define	EHE_DEAD_PRIORITY	(-1)
+	void				*ee_arg;
+};
+
+#ifdef VIMAGE
+struct eventhandler_entry_vimage {
+	void	(* func)(void);		/* Original function registered. */
+	void	*ee_arg;		/* Original argument registered. */
+	void	*sparep[2];
+};
+#endif
+
+struct eventhandler_list {
+	char				*el_name;
+	int				el_flags;
+#define EHL_INITTED	(1<<0)
+	u_int				el_runcount;
+	struct mtx			el_lock;
+	TAILQ_ENTRY(eventhandler_list)	el_link;
+	TAILQ_HEAD(,eventhandler_entry)	el_entries;
+};
+
+typedef struct eventhandler_entry	*eventhandler_tag;
+
+#define	EHL_LOCK(p)		mtx_lock(&(p)->el_lock)
+#define	EHL_UNLOCK(p)		mtx_unlock(&(p)->el_lock)
+#define	EHL_LOCK_ASSERT(p, x)	mtx_assert(&(p)->el_lock, x)
+
+/*
+ * Macro to invoke the handlers for a given event.
+ */
+#define _EVENTHANDLER_INVOKE(name, list, ...) do {			\
+	struct eventhandler_entry *_ep;					\
+	struct eventhandler_entry_ ## name *_t;				\
+									\
+	KASSERT((list)->el_flags & EHL_INITTED,				\
+ 	   ("eventhandler_invoke: running non-inited list"));		\
+	EHL_LOCK_ASSERT((list), MA_OWNED);				\
+	(list)->el_runcount++;						\
+	KASSERT((list)->el_runcount > 0,				\
+	    ("eventhandler_invoke: runcount overflow"));		\
+	CTR0(KTR_EVH, "eventhandler_invoke(\"" __STRING(name) "\")");	\
+	TAILQ_FOREACH(_ep, &((list)->el_entries), ee_link) {		\
+		if (_ep->ee_priority != EHE_DEAD_PRIORITY) {		\
+			EHL_UNLOCK((list));				\
+			_t = (struct eventhandler_entry_ ## name *)_ep;	\
+			CTR1(KTR_EVH, "eventhandler_invoke: executing %p", \
+ 			    (void *)_t->eh_func);			\
+			_t->eh_func(_ep->ee_arg , ## __VA_ARGS__);	\
+			EHL_LOCK((list));				\
+		}							\
+	}								\
+	KASSERT((list)->el_runcount > 0,				\
+	    ("eventhandler_invoke: runcount underflow"));		\
+	(list)->el_runcount--;						\
+	if ((list)->el_runcount == 0)					\
+		eventhandler_prune_list(list);				\
+	EHL_UNLOCK((list));						\
+} while (0)
+
+/*
+ * Slow handlers are entirely dynamic; lists are created
+ * when entries are added to them, and thus have no concept of "owner",
+ *
+ * Slow handlers need to be declared, but do not need to be defined. The
+ * declaration must be in scope wherever the handler is to be invoked.
+ */
+#define EVENTHANDLER_DECLARE(name, type)				\
+struct eventhandler_entry_ ## name 					\
+{									\
+	struct eventhandler_entry	ee;				\
+	type				eh_func;			\
+};									\
+struct __hack
+
+#define EVENTHANDLER_DEFINE(name, func, arg, priority)			\
+	static eventhandler_tag name ## _tag;				\
+	static void name ## _evh_init(void *ctx)			\
+	{								\
+		name ## _tag = EVENTHANDLER_REGISTER(name, func, ctx,	\
+		    priority);						\
+	}								\
+	SYSINIT(name ## _evh_init, SI_SUB_CONFIGURE, SI_ORDER_ANY,	\
+	    name ## _evh_init, arg);					\
+	struct __hack
+
+#define EVENTHANDLER_INVOKE(name, ...)					\
+do {									\
+	struct eventhandler_list *_el;					\
+									\
+	if ((_el = eventhandler_find_list(#name)) != NULL) 		\
+		_EVENTHANDLER_INVOKE(name, _el , ## __VA_ARGS__);	\
+} while (0)
+
+#define EVENTHANDLER_REGISTER(name, func, arg, priority)		\
+	eventhandler_register(NULL, #name, func, arg, priority)
+
+#define EVENTHANDLER_DEREGISTER(name, tag) 				\
+do {									\
+	struct eventhandler_list *_el;					\
+									\
+	if ((_el = eventhandler_find_list(#name)) != NULL)		\
+		eventhandler_deregister(_el, tag);			\
+} while(0)
+	
+
+eventhandler_tag eventhandler_register(struct eventhandler_list *list, 
+	    const char *name, void *func, void *arg, int priority);
+void	eventhandler_deregister(struct eventhandler_list *list,
+	    eventhandler_tag tag);
+struct eventhandler_list *eventhandler_find_list(const char *name);
+void	eventhandler_prune_list(struct eventhandler_list *list);
+
+#ifdef VIMAGE
+typedef	void (*vimage_iterator_func_t)(void *, ...);
+
+eventhandler_tag vimage_eventhandler_register(struct eventhandler_list *list,
+	    const char *name, void *func, void *arg, int priority,
+	    vimage_iterator_func_t);
+#endif
+
+/*
+ * Standard system event queues.
+ */
+
+/* Generic priority levels */
+#define	EVENTHANDLER_PRI_FIRST	0
+#define	EVENTHANDLER_PRI_ANY	10000
+#define	EVENTHANDLER_PRI_LAST	20000
+
+/* Shutdown events */
+typedef void (*shutdown_fn)(void *, int);
+
+#define	SHUTDOWN_PRI_FIRST	EVENTHANDLER_PRI_FIRST
+#define	SHUTDOWN_PRI_DEFAULT	EVENTHANDLER_PRI_ANY
+#define	SHUTDOWN_PRI_LAST	EVENTHANDLER_PRI_LAST
+
+EVENTHANDLER_DECLARE(shutdown_pre_sync, shutdown_fn);	/* before fs sync */
+EVENTHANDLER_DECLARE(shutdown_post_sync, shutdown_fn);	/* after fs sync */
+EVENTHANDLER_DECLARE(shutdown_final, shutdown_fn);
+
+/* Low memory event */
+typedef void (*vm_lowmem_handler_t)(void *, int);
+#define	LOWMEM_PRI_DEFAULT	EVENTHANDLER_PRI_FIRST
+EVENTHANDLER_DECLARE(vm_lowmem, vm_lowmem_handler_t);
+
+/* Root mounted event */
+typedef void (*mountroot_handler_t)(void *);
+EVENTHANDLER_DECLARE(mountroot, mountroot_handler_t);
+
+/* VLAN state change events */
+struct ifnet;
+typedef void (*vlan_config_fn)(void *, struct ifnet *, uint16_t);
+typedef void (*vlan_unconfig_fn)(void *, struct ifnet *, uint16_t);
+EVENTHANDLER_DECLARE(vlan_config, vlan_config_fn);
+EVENTHANDLER_DECLARE(vlan_unconfig, vlan_unconfig_fn);
+
+/* BPF attach/detach events */
+struct ifnet;
+typedef void (*bpf_track_fn)(void *, struct ifnet *, int /* dlt */,
+    int /* 1 =>'s attach */);
+EVENTHANDLER_DECLARE(bpf_track, bpf_track_fn);
+
+/*
+ * Process events
+ * process_fork and exit handlers are called without Giant.
+ * exec handlers are called with Giant, but that is by accident.
+ */
+struct proc;
+struct image_params;
+
+typedef void (*exitlist_fn)(void *, struct proc *);
+typedef void (*forklist_fn)(void *, struct proc *, struct proc *, int);
+typedef void (*execlist_fn)(void *, struct proc *, struct image_params *);
+typedef void (*proc_ctor_fn)(void *, struct proc *);
+typedef void (*proc_dtor_fn)(void *, struct proc *);
+typedef void (*proc_init_fn)(void *, struct proc *);
+typedef void (*proc_fini_fn)(void *, struct proc *);
+EVENTHANDLER_DECLARE(process_ctor, proc_ctor_fn);
+EVENTHANDLER_DECLARE(process_dtor, proc_dtor_fn);
+EVENTHANDLER_DECLARE(process_init, proc_init_fn);
+EVENTHANDLER_DECLARE(process_fini, proc_fini_fn);
+EVENTHANDLER_DECLARE(process_exit, exitlist_fn);
+EVENTHANDLER_DECLARE(process_fork, forklist_fn);
+EVENTHANDLER_DECLARE(process_exec, execlist_fn);
+
+struct thread;
+typedef void (*thread_ctor_fn)(void *, struct thread *);
+typedef void (*thread_dtor_fn)(void *, struct thread *);
+typedef void (*thread_fini_fn)(void *, struct thread *);
+typedef void (*thread_init_fn)(void *, struct thread *);
+EVENTHANDLER_DECLARE(thread_ctor, thread_ctor_fn);
+EVENTHANDLER_DECLARE(thread_dtor, thread_dtor_fn);
+EVENTHANDLER_DECLARE(thread_init, thread_init_fn);
+EVENTHANDLER_DECLARE(thread_fini, thread_fini_fn);
+
+typedef void (*uma_zone_chfn)(void *);
+EVENTHANDLER_DECLARE(nmbclusters_change, uma_zone_chfn);
+EVENTHANDLER_DECLARE(maxsockets_change, uma_zone_chfn);
+
+typedef void(*schedtail_fn)(void *, struct proc *);
+EVENTHANDLER_DECLARE(schedtail, schedtail_fn);
+#endif /* SYS_EVENTHANDLER_H */