1 | /*- |
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2 | * Copyright (c) 2010 Isilon Systems, Inc. |
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3 | * Copyright (c) 2010 iX Systems, Inc. |
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4 | * Copyright (c) 2010 Panasas, Inc. |
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5 | * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. |
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6 | * All rights reserved. |
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7 | * |
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8 | * Redistribution and use in source and binary forms, with or without |
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9 | * modification, are permitted provided that the following conditions |
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10 | * are met: |
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11 | * 1. Redistributions of source code must retain the above copyright |
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12 | * notice unmodified, this list of conditions, and the following |
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13 | * disclaimer. |
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14 | * 2. Redistributions in binary form must reproduce the above copyright |
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15 | * notice, this list of conditions and the following disclaimer in the |
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16 | * documentation and/or other materials provided with the distribution. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | * |
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29 | * $FreeBSD$ |
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30 | */ |
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31 | #ifndef _LINUX_WAIT_H_ |
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32 | #define _LINUX_WAIT_H_ |
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33 | |
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34 | #include <linux/spinlock.h> |
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35 | #include <linux/sched.h> |
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36 | #include <linux/list.h> |
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37 | |
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38 | #include <sys/param.h> |
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39 | #include <sys/systm.h> |
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40 | #include <sys/sleepqueue.h> |
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41 | #include <sys/kernel.h> |
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42 | #include <sys/proc.h> |
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43 | |
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44 | typedef struct { |
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45 | } wait_queue_t; |
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46 | |
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47 | typedef struct { |
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48 | unsigned int wchan; |
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49 | } wait_queue_head_t; |
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50 | |
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51 | #define init_waitqueue_head(x) \ |
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52 | do { } while (0) |
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53 | |
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54 | #define DECLARE_WAIT_QUEUE_HEAD(x) wait_queue_head_t x = { 0 } |
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55 | |
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56 | static inline void |
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57 | __wake_up(wait_queue_head_t *q, int all) |
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58 | { |
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59 | int wakeup_swapper; |
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60 | void *c; |
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61 | |
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62 | c = &q->wchan; |
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63 | sleepq_lock(c); |
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64 | if (all) |
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65 | wakeup_swapper = sleepq_broadcast(c, SLEEPQ_SLEEP, 0, 0); |
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66 | else |
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67 | wakeup_swapper = sleepq_signal(c, SLEEPQ_SLEEP, 0, 0); |
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68 | sleepq_release(c); |
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69 | if (wakeup_swapper) |
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70 | kick_proc0(); |
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71 | } |
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72 | |
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73 | #define wake_up(q) __wake_up(q, 0) |
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74 | #define wake_up_nr(q, nr) __wake_up(q, 1) |
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75 | #define wake_up_all(q) __wake_up(q, 1) |
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76 | #define wake_up_interruptible(q) __wake_up(q, 0) |
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77 | #define wake_up_interruptible_nr(q, nr) __wake_up(q, 1) |
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78 | #define wake_up_interruptible_all(q, nr) __wake_up(q, 1) |
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79 | |
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80 | #define wait_event(q, cond) \ |
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81 | do { \ |
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82 | void *c = &(q).wchan; \ |
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83 | if (!(cond)) { \ |
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84 | for (;;) { \ |
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85 | sleepq_lock(c); \ |
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86 | if (cond) { \ |
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87 | sleepq_release(c); \ |
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88 | break; \ |
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89 | } \ |
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90 | sleepq_add(c, NULL, "completion", SLEEPQ_SLEEP, 0); \ |
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91 | sleepq_wait(c, 0); \ |
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92 | } \ |
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93 | } \ |
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94 | } while (0) |
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95 | |
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96 | #ifndef __rtems__ |
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97 | #define wait_event_interruptible(q, cond) \ |
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98 | ({ \ |
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99 | void *c = &(q).wchan; \ |
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100 | int _error; \ |
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101 | \ |
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102 | _error = 0; \ |
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103 | if (!(cond)) { \ |
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104 | for (; _error == 0;) { \ |
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105 | sleepq_lock(c); \ |
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106 | if (cond) { \ |
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107 | sleepq_release(c); \ |
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108 | break; \ |
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109 | } \ |
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110 | sleepq_add(c, NULL, "completion", \ |
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111 | SLEEPQ_SLEEP | SLEEPQ_INTERRUPTIBLE, 0); \ |
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112 | if (sleepq_wait_sig(c, 0)) \ |
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113 | _error = -ERESTARTSYS; \ |
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114 | } \ |
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115 | } \ |
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116 | -_error; \ |
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117 | }) |
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118 | #else /* __rtems__ */ |
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119 | #define wait_event_interruptible(q, cond) \ |
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120 | ({ \ |
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121 | wait_event(q, cond); \ |
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122 | 0; \ |
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123 | }) |
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124 | #endif /* __rtems__ */ |
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125 | |
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126 | static inline int |
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127 | waitqueue_active(wait_queue_head_t *q) |
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128 | { |
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129 | return 0; /* XXX: not really implemented */ |
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130 | } |
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131 | |
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132 | #define DEFINE_WAIT(name) \ |
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133 | wait_queue_t name = {} |
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134 | |
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135 | static inline void |
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136 | prepare_to_wait(wait_queue_head_t *q, wait_queue_t *wait, int state) |
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137 | { |
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138 | } |
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139 | |
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140 | static inline void |
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141 | finish_wait(wait_queue_head_t *q, wait_queue_t *wait) |
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142 | { |
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143 | } |
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144 | |
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145 | #endif /* _LINUX_WAIT_H_ */ |
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