Author: manu Date: Mon May 25 12:44:07 2020 New Revision: 361450 URL: https://svnweb.freebsd.org/changeset/base/361450
Log: linuxkpi: Add refcount.h Implement some refcount functions needed by drm. Just use the atomic_t struct and functions from linuxkpi for simplicity. Sponsored-by: The FreeBSD Foundation Reviewed by: hselsasky Differential Revision: https://reviews.freebsd.org/D24985 Added: head/sys/compat/linuxkpi/common/include/linux/refcount.h (contents, props changed) Added: head/sys/compat/linuxkpi/common/include/linux/refcount.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/compat/linuxkpi/common/include/linux/refcount.h Mon May 25 12:44:07 2020 (r361450) @@ -0,0 +1,82 @@ +/*- + * Copyright (c) 2020 The FreeBSD Foundation + * + * This software was developed by Emmanuel Vadot under sponsorship + * from the FreeBSD Foundation. + * + * 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 _LINUX_REFCOUNT_H +#define _LINUX_REFCOUNT_H + +#include <linux/atomic.h> + +struct refcount_linux { + atomic_t value; +}; +typedef struct refcount_linux refcount_t; + +static inline void +refcount_set(refcount_t *ref, unsigned int i) +{ + atomic_set(&ref->value, i); +} + +static inline void +refcount_inc(refcount_t *ref) +{ + atomic_inc(&ref->value); +} + +static inline bool +refcount_inc_not_zero(refcount_t *ref) +{ + return (atomic_inc_not_zero(&ref->value)); +} + +static inline void +refcount_dec(refcount_t *ref) +{ + atomic_dec(&ref->value); +} + +static inline unsigned int +refcount_read(refcount_t *ref) +{ + return atomic_read(&ref->value); +} + +static inline bool +refcount_dec_and_lock_irqsave(refcount_t *ref, spinlock_t *lock, + unsigned long *flags) +{ + if (atomic_dec_and_test(&ref->value) == true) { + spin_lock_irqsave(lock, flags); + return (true); + } + return (false); +} + +#endif /* __LINUX_REFCOUNT_H__ */ _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
