| /*- |
| * Copyright (c) 2006 Kip Macy kmacy@FreeBSD.org |
| * Copyright (c) 2006 Kris Kennaway kris@FreeBSD.org |
| * Copyright (c) 2006 Dag-Erling Smorgrav des@des.no |
| * |
| * 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 AUTHORS ``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 SHAL THE AUTHORS 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 _BSD_SYS_LOCK_PROFILE_H_ |
| #define _BSD_SYS_LOCK_PROFILE_H_ |
| |
| struct lock_profile_object; |
| LIST_HEAD(lpohead, lock_profile_object); |
| |
| #ifdef _FREEBSD_KERNEL |
| #ifdef LOCK_PROFILING |
| #include <machine/bsd_cpufunc.h> |
| #include <sys/bsd_lock.h> |
| |
| #ifndef USE_CPU_NANOSECONDS |
| u_int64_t nanoseconds(void); |
| #endif |
| |
| extern volatile int lock_prof_enable; |
| |
| void lock_profile_obtain_lock_success(struct lock_object *lo, int contested, |
| uint64_t waittime, const char *file, int line); |
| void lock_profile_release_lock(struct lock_object *lo); |
| void lock_profile_thread_exit(struct thread *td); |
| |
| |
| static inline void |
| lock_profile_obtain_lock_failed(struct lock_object *lo, int *contested, |
| uint64_t *waittime) |
| { |
| if (!lock_prof_enable || (lo->lo_flags & LO_NOPROFILE) || *contested) |
| return; |
| *waittime = nanoseconds(); |
| *contested = 1; |
| } |
| |
| #else /* !LOCK_PROFILING */ |
| |
| #define lock_profile_release_lock(lo) (void)0 |
| #define lock_profile_obtain_lock_failed(lo, contested, waittime) (void)0 |
| #define lock_profile_obtain_lock_success(lo, contested, waittime, file, line) (void)0 |
| #define lock_profile_thread_exit(td) (void)0 |
| |
| #endif /* !LOCK_PROFILING */ |
| |
| #endif /* _FREEBSD_KERNEL */ |
| |
| #endif /* _BSD_SYS_LOCK_PROFILE_H_ */ |
