1 /* 2 * Copyright (c) 2014-2018, 2021 The Linux Foundation. All rights reserved. 3 * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. 4 * 5 * Permission to use, copy, modify, and/or distribute this software for 6 * any purpose with or without fee is hereby granted, provided that the 7 * above copyright notice and this permission notice appear in all 8 * copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 11 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 12 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 13 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 14 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 15 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 16 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 17 * PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 /** 21 * DOC: qdf_event.h 22 * This file provides OS abstraction for event APIs. 23 */ 24 25 #if !defined(__QDF_EVENT_H) 26 #define __QDF_EVENT_H 27 28 /* Include Files */ 29 #include "qdf_status.h" 30 #include <qdf_types.h> 31 #include <i_qdf_event.h> 32 #include <qdf_trace.h> 33 #include <qdf_list.h> 34 35 /* Preprocessor definitions and constants */ 36 #ifdef __cplusplus 37 extern "C" { 38 #endif /* __cplusplus */ 39 40 typedef __qdf_event_t qdf_event_t; 41 /* Function declarations and documenation */ 42 43 QDF_STATUS qdf_event_create(qdf_event_t *event); 44 45 /** 46 * qdf_event_set() - sets a QDF event for single waiting threads 47 * @event: The event to set to the signalled state 48 * 49 * The state of the specified event is set to signalled by calling 50 * qdf_event_set(). 51 * 52 * Single thread waiting on the event as a result of a qdf_event_wait() will 53 * be unblocked and available to be scheduled for execution when the event 54 * is signaled by a call to qdf_event_set(). 55 * 56 * Return: QDF status 57 */ 58 QDF_STATUS qdf_event_set(qdf_event_t *event); 59 60 /** 61 * qdf_event_set_all() - sets a QDF event for all waiting threads 62 * @event: The event to set to the signalled state 63 * 64 * The state of the specified event is set to signalled by calling 65 * qdf_event_set_all(). 66 * 67 * Any threads waiting on the event as a result of a qdf_event_wait() will 68 * be unblocked and available to be scheduled for execution when the event 69 * is signaled by a call to qdf_event_set(). 70 * 71 * Return: QDF status 72 */ 73 QDF_STATUS qdf_event_set_all(qdf_event_t *event); 74 75 QDF_STATUS qdf_event_reset(qdf_event_t *event); 76 77 QDF_STATUS qdf_event_destroy(qdf_event_t *event); 78 79 QDF_STATUS qdf_wait_single_event(qdf_event_t *event, 80 uint32_t timeout); 81 82 /** 83 * qdf_complete_wait_events() - Sets all the events which are in the list. 84 * 85 * This function traverses the list of events and sets all of them. It 86 * sets the flag force_set as TRUE to indicate that these events have 87 * been forcefully set. 88 * 89 * Return: None 90 */ 91 void qdf_complete_wait_events(void); 92 93 /** 94 * qdf_wait_for_event_completion() - Waits for an event to be set. 95 * @event: Pointer to an event to wait on. 96 * @timeout: Timeout value (in milliseconds). 97 * 98 * This function adds the event in a list and waits on it until it 99 * is set or the timeout duration elapses. The purpose of waiting 100 * is considered complete only if the event is set and the flag 101 * force_set is FALSE, it returns success in this case. In other 102 * cases it returns appropriate error status. 103 * 104 * Return: QDF status 105 */ 106 QDF_STATUS qdf_wait_for_event_completion(qdf_event_t *event, 107 uint32_t timeout); 108 109 /** 110 * qdf_event_list_init() - Creates a list and spinlock for events. 111 * 112 * This function creates a list for maintaining events on which threads 113 * wait for completion. A spinlock is also created to protect related 114 * operations. 115 * 116 * Return: None 117 */ 118 void qdf_event_list_init(void); 119 120 /** 121 * qdf_event_list_destroy() - Destroys list and spinlock created for events. 122 * 123 * This function destroys the list and spinlock created for events on which 124 * threads wait for completion. 125 * 126 * Return: None 127 */ 128 void qdf_event_list_destroy(void); 129 130 #ifdef __cplusplus 131 } 132 #endif /* __cplusplus */ 133 #endif /* __QDF_EVENT_H */ 134