1 /*- 2 * Copyright (c) 2020 The FreeBSD Foundation 3 * 4 * This software was developed by Emmanuel Vadot under sponsorship 5 * from the FreeBSD Foundation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #ifndef __LINUXKPI_LINUX_WAITBIT_H__ 30 #define __LINUXKPI_LINUX_WAITBIT_H__ 31 32 #include <linux/wait.h> 33 #include <linux/bitops.h> 34 35 extern wait_queue_head_t linux_bit_waitq; 36 extern wait_queue_head_t linux_var_waitq; 37 38 #define wait_var_event_killable(var, cond) \ 39 wait_event_killable(linux_var_waitq, cond) 40 41 #define wait_var_event_interruptible(var, cond) \ 42 wait_event_interruptible(linux_var_waitq, cond) 43 44 static inline void 45 clear_and_wake_up_bit(int bit, void *word) 46 { 47 clear_bit_unlock(bit, word); 48 wake_up_bit(word, bit); 49 } 50 51 static inline wait_queue_head_t * 52 bit_waitqueue(void *word, int bit) 53 { 54 55 return (&linux_bit_waitq); 56 } 57 58 static inline void 59 wake_up_var(void *var) 60 { 61 62 wake_up(&linux_var_waitq); 63 } 64 65 static inline wait_queue_head_t * 66 __var_waitqueue(void *p) 67 { 68 return (&linux_var_waitq); 69 } 70 71 #endif /* __LINUXKPI_LINUX_WAITBIT_H__ */ 72