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Diffstat (limited to 'freebsd/sys/sys/_eventhandler.h')
| -rw-r--r-- | freebsd/sys/sys/_eventhandler.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/freebsd/sys/sys/_eventhandler.h b/freebsd/sys/sys/_eventhandler.h new file mode 100644 index 00000000..f8f24d2b --- /dev/null +++ b/freebsd/sys/sys/_eventhandler.h @@ -0,0 +1,144 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * 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 <sys/queue.h> + +struct eventhandler_entry { + TAILQ_ENTRY(eventhandler_entry) ee_link; + int ee_priority; +#define EHE_DEAD_PRIORITY (-1) + void *ee_arg; +}; + +typedef struct eventhandler_entry *eventhandler_tag; + +/* + * You can optionally use the EVENTHANDLER_LIST and EVENTHANDLER_DIRECT macros + * to pre-define a symbol for the eventhandler list. This symbol can be used by + * EVENTHANDLER_DIRECT_INVOKE, which has the advantage of not needing to do a + * locked search of the global list of eventhandler lists. At least + * EVENTHANDLER_LIST_DEFINE must be be used for EVENTHANDLER_DIRECT_INVOKE to + * work. EVENTHANDLER_LIST_DECLARE is only needed if the call to + * EVENTHANDLER_DIRECT_INVOKE is in a different compilation unit from + * EVENTHANDLER_LIST_DEFINE. If the events are even relatively high frequency + * it is suggested that you directly define a list for them. + */ +struct eventhandler_list; +#define EVENTHANDLER_LIST_DECLARE(name) \ +extern struct eventhandler_list *_eventhandler_list_ ## name \ + +/* + * Event 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 + +#endif +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * 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 <sys/queue.h> + +struct eventhandler_entry { + TAILQ_ENTRY(eventhandler_entry) ee_link; + int ee_priority; +#define EHE_DEAD_PRIORITY (-1) + void *ee_arg; +}; + +typedef struct eventhandler_entry *eventhandler_tag; + +/* + * You can optionally use the EVENTHANDLER_LIST and EVENTHANDLER_DIRECT macros + * to pre-define a symbol for the eventhandler list. This symbol can be used by + * EVENTHANDLER_DIRECT_INVOKE, which has the advantage of not needing to do a + * locked search of the global list of eventhandler lists. At least + * EVENTHANDLER_LIST_DEFINE must be be used for EVENTHANDLER_DIRECT_INVOKE to + * work. EVENTHANDLER_LIST_DECLARE is only needed if the call to + * EVENTHANDLER_DIRECT_INVOKE is in a different compilation unit from + * EVENTHANDLER_LIST_DEFINE. If the events are even relatively high frequency + * it is suggested that you directly define a list for them. + */ +struct eventhandler_list; +#define EVENTHANDLER_LIST_DECLARE(name) \ +extern struct eventhandler_list *_eventhandler_list_ ## name \ + +/* + * Event 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 + +#endif |