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annotate packages/kernel/current/include/kapi.h @ 181:d61da071934c

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Merge from eCos master repository on 2001-08-22-06:38:55-BST
author jlarmour
date Wed, 22 Aug 2001 06:27:14 +0000
parents 391299f9e541
children e0c0827131d1
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1 #ifndef CYGONCE_KERNEL_KAPI_H
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2 #define CYGONCE_KERNEL_KAPI_H
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3
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4 /*==========================================================================
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5 //
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6 // kapi.h
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7 //
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8 // Native API for Kernel
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9 //
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10 //==========================================================================
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11 //####COPYRIGHTBEGIN####
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12 //
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13 // -------------------------------------------
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14 // The contents of this file are subject to the Red Hat eCos Public License
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15 // Version 1.1 (the "License"); you may not use this file except in
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16 // compliance with the License. You may obtain a copy of the License at
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17 // http://www.redhat.com/
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18 //
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19 // Software distributed under the License is distributed on an "AS IS"
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20 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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21 // License for the specific language governing rights and limitations under
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22 // the License.
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23 //
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24 // The Original Code is eCos - Embedded Configurable Operating System,
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25 // released September 30, 1998.
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26 //
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27 // The Initial Developer of the Original Code is Red Hat.
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28 // Portions created by Red Hat are
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29 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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30 // All Rights Reserved.
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31 // -------------------------------------------
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32 //
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33 //####COPYRIGHTEND####
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34 //==========================================================================
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35 //#####DESCRIPTIONBEGIN####
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36 //
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37 // Author(s): nickg, dsm
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38 // Contributors: nickg
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39 // Date: 1998-03-02
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40 // Purpose: Native API for Kernel
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41 // Description: This file describes the native API for using the kernel.
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42 // It is essentially a set of C wrappers for the C++ class
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43 // member functions.
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44 // Usage: #include <cyg/kernel/kapi.h>
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45 //
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46 //####DESCRIPTIONEND####
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47 //
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48 //========================================================================*/
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49
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50 #include <pkgconf/kernel.h>
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51
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52 #ifdef CYGFUN_KERNEL_API_C
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53 #include <cyg/infra/cyg_type.h>
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54
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55 /*---------------------------------------------------------------------------*/
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56
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57 #ifdef __cplusplus
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58 extern "C" {
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59 #endif
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60
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61 /*---------------------------------------------------------------------------*/
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62 /* The following are derived types, they may have different */
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63 /* definitions from these depending on configuration. */
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64
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65 typedef CYG_ADDRWORD cyg_addrword_t; /* May hold pointer or word */
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66 typedef cyg_addrword_t cyg_handle_t; /* Object handle */
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67 typedef cyg_uint32 cyg_priority_t; /* type for priorities */
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68 typedef cyg_int32 cyg_code_t; /* type for various codes */
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69 typedef cyg_uint32 cyg_vector_t; /* Interrupt vector id */
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70 typedef cyg_uint32 cyg_cpu_t; /* CPU id type */
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71
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72 typedef cyg_uint64 cyg_tick_count_t;
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73
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74 typedef int cyg_bool_t;
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75
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76 /* Exception handler function definition */
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77 typedef void cyg_exception_handler_t(
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78 cyg_addrword_t data,
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79 cyg_code_t exception_number,
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80 cyg_addrword_t info
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81 );
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82
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83 /*---------------------------------------------------------------------------*/
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84 struct cyg_thread;
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85 typedef struct cyg_thread cyg_thread;
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86
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87 struct cyg_interrupt;
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88 typedef struct cyg_interrupt cyg_interrupt;
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89
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90 struct cyg_counter;
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91 typedef struct cyg_counter cyg_counter;
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92
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93 struct cyg_clock;
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94 typedef struct cyg_clock cyg_clock;
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95
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96 struct cyg_alarm;
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97 typedef struct cyg_alarm cyg_alarm;
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98
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99 struct cyg_mbox;
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100 typedef struct cyg_mbox cyg_mbox;
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101
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102 struct cyg_sem_t;
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103 typedef struct cyg_sem_t cyg_sem_t;
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104
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105 struct cyg_flag_t;
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106 typedef struct cyg_flag_t cyg_flag_t;
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107
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108 struct cyg_mutex_t;
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109 typedef struct cyg_mutex_t cyg_mutex_t;
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110
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111 struct cyg_cond_t;
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112 typedef struct cyg_cond_t cyg_cond_t;
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113
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114 struct cyg_spinlock_t;
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115 typedef struct cyg_spinlock_t cyg_spinlock_t;
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116
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117 /*---------------------------------------------------------------------------*/
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118 /* Scheduler operations */
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119
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120 /* Starts scheduler with created threads. Never returns. */
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121 void cyg_scheduler_start(void) __attribute__ ((noreturn));
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122
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123 /* Lock and unlock the scheduler. When the scheduler is */
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124 /* locked thread preemption is disabled. */
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125 void cyg_scheduler_lock(void);
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126
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127 void cyg_scheduler_unlock(void);
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128
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129 /* Just like 'cyg_scheduler_lock()', but never take the lock higher than 1 */
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130 /* Thus this call is safe even if the scheduler is already locked and a */
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131 /* subsequent call to 'cyg_scheduler_unlock()' will completely unlock. */
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132 void cyg_scheduler_safe_lock(void);
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133
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134 /* Read the scheduler lock value. */
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135 cyg_ucount32 cyg_scheduler_read_lock(void);
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136
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137 /*---------------------------------------------------------------------------*/
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138 /* Thread operations */
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139
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140 typedef void cyg_thread_entry_t(cyg_addrword_t);
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141
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142 void cyg_thread_create(
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143 cyg_addrword_t sched_info, /* scheduling info (eg pri) */
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144 cyg_thread_entry_t *entry, /* entry point function */
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145 cyg_addrword_t entry_data, /* entry data */
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146 char *name, /* optional thread name */
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147 void *stack_base, /* stack base, NULL = alloc */
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148 cyg_ucount32 stack_size, /* stack size, 0 = default */
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149 cyg_handle_t *handle, /* returned thread handle */
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150 cyg_thread *thread /* put thread here */
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151 );
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152
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153 void cyg_thread_exit(void);
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154
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155 /* It may be necessary to arrange for the victim to run for it to disappear */
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156 cyg_bool_t cyg_thread_delete(cyg_handle_t thread); /* false if NOT deleted */
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157
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158 void cyg_thread_suspend(cyg_handle_t thread);
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159
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160 void cyg_thread_resume(cyg_handle_t thread);
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161
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162 void cyg_thread_kill(cyg_handle_t thread);
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163
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164 void cyg_thread_release(cyg_handle_t thread);
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165
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166 void cyg_thread_yield(void);
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167
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168 cyg_handle_t cyg_thread_self(void);
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169
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170 cyg_handle_t cyg_thread_idle_thread(void);
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171
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172 /* Priority manipulation */
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173
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174 void cyg_thread_set_priority(cyg_handle_t thread, cyg_priority_t priority );
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175
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176 cyg_priority_t cyg_thread_get_priority(cyg_handle_t thread);
179
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177 cyg_priority_t cyg_thread_get_current_priority(cyg_handle_t thread);
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178
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179 /* Deadline scheduling control (optional) */
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180
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181 void cyg_thread_deadline_wait(
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182 cyg_tick_count_t start_time, /* abs earliest start time */
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183 cyg_tick_count_t run_time, /* worst case execution time */
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184 cyg_tick_count_t deadline /* absolute deadline */
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185 );
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186
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187 void cyg_thread_delay(cyg_tick_count_t delay);
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188
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189 /* Stack information */
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190 cyg_addrword_t cyg_thread_get_stack_base(cyg_handle_t thread);
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191
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192 cyg_uint32 cyg_thread_get_stack_size(cyg_handle_t thread);
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193
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194 #ifdef CYGFUN_KERNEL_THREADS_STACK_MEASUREMENT
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195 cyg_uint32 cyg_thread_measure_stack_usage(cyg_handle_t thread);
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196 #endif
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197
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198 /*---------------------------------------------------------------------------*/
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199 /* Per-thread Data */
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200
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201 #ifdef CYGVAR_KERNEL_THREADS_DATA
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202
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203 cyg_ucount32 cyg_thread_new_data_index(void);
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204
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205 void cyg_thread_free_data_index(cyg_ucount32 index);
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206
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207 CYG_ADDRWORD cyg_thread_get_data(cyg_ucount32 index);
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208
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209 CYG_ADDRWORD *cyg_thread_get_data_ptr(cyg_ucount32 index);
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210
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211 void cyg_thread_set_data(cyg_ucount32 index, CYG_ADDRWORD data);
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212
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213 #endif
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214
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215 /*---------------------------------------------------------------------------*/
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216 /* Exception handling. */
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217
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218 /* Replace current exception handler, this may apply to either the */
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219 /* current thread, or to a global exception handler. The exception */
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220 /* number may be ignored, or used to specify a particular handler. */
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221
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222 void cyg_exception_set_handler(
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223 cyg_code_t exception_number,
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224 cyg_exception_handler_t *new_handler,
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225 cyg_addrword_t new_data,
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226 cyg_exception_handler_t **old_handler,
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227 cyg_addrword_t *old_data
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228 );
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229
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230 /* Clear exception hander to default value */
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231 void cyg_exception_clear_handler(
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232 cyg_code_t exception_number
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233 );
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234
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235 /* Invoke exception handler */
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236 void cyg_exception_call_handler(
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237 cyg_handle_t thread,
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238 cyg_code_t exception_number,
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239 cyg_addrword_t exception_info
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240 );
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241
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242
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243 /*---------------------------------------------------------------------------*/
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244 /* Interrupt handling */
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245 typedef void cyg_VSR_t(void);
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246 typedef cyg_uint32 cyg_ISR_t(cyg_vector_t vector, cyg_addrword_t data);
177
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247 typedef void cyg_DSR_t( cyg_vector_t vector,
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248 cyg_ucount32 count,
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249 cyg_addrword_t data);
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250
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251
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252 enum cyg_ISR_results
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253 {
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254 CYG_ISR_HANDLED = 1, /* Interrupt was handled */
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255 CYG_ISR_CALL_DSR = 2 /* Schedule DSR */
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256 };
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257
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258 void cyg_interrupt_create(
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259 cyg_vector_t vector, /* Vector to attach to */
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260 cyg_priority_t priority, /* Queue priority */
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261 cyg_addrword_t data, /* Data pointer */
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262 cyg_ISR_t *isr, /* Interrupt Service Routine */
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263 cyg_DSR_t *dsr, /* Deferred Service Routine */
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264 cyg_handle_t *handle, /* returned handle */
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265 cyg_interrupt *intr /* put interrupt here */
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266 );
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267
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268 void cyg_interrupt_delete( cyg_handle_t interrupt );
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269
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270 void cyg_interrupt_attach( cyg_handle_t interrupt );
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271
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272 void cyg_interrupt_detach( cyg_handle_t interrupt );
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273
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274 /* VSR manipulation */
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275
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276 void cyg_interrupt_get_vsr(
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277 cyg_vector_t vector, /* vector to get */
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278 cyg_VSR_t **vsr /* vsr got */
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279 );
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280
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281 void cyg_interrupt_set_vsr(
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282 cyg_vector_t vector, /* vector to set */
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283 cyg_VSR_t *vsr /* vsr to set */
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284 );
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285
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286 /* CPU level interrupt mask */
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287 void cyg_interrupt_disable(void);
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288
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289 void cyg_interrupt_enable(void);
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290
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291 /* Interrupt controller access */
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292 void cyg_interrupt_mask(cyg_vector_t vector);
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293
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294 void cyg_interrupt_unmask(cyg_vector_t vector);
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295
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296 void cyg_interrupt_acknowledge(cyg_vector_t vector);
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297
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298 void cyg_interrupt_configure(
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299 cyg_vector_t vector, /* vector to configure */
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300 cyg_bool_t level, /* level or edge triggered */
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301 cyg_bool_t up /* rising/faling edge, high/low level*/
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302 );
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303
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304 void cyg_interrupt_set_cpu(
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305 cyg_vector_t vector, /* vector to control */
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306 cyg_cpu_t cpu /* CPU to set */
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307 );
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308
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309 cyg_cpu_t cyg_interrupt_get_cpu(
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310 cyg_vector_t vector /* vector to control */
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311 );
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312
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313 /*---------------------------------------------------------------------------*/
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314 /* Counters, Clocks and Alarms */
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315
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316 void cyg_counter_create(
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317 cyg_handle_t *handle, /* returned counter handle */
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318 cyg_counter *counter /* put counter here */
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319 );
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320
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321 void cyg_counter_delete(cyg_handle_t counter);
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322
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323 /* Return current value of counter */
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324 cyg_tick_count_t cyg_counter_current_value(cyg_handle_t counter);
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325
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326 /* Set new current value */
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327 void cyg_counter_set_value(
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328 cyg_handle_t counter,
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329 cyg_tick_count_t new_value
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330 );
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331
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332 /* Advance counter by one tick */
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333 void cyg_counter_tick(cyg_handle_t counter);
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334
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335
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336 #define CYG_RESOLUTION_T_MEMBERS \
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337 cyg_uint32 dividend; \
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338 cyg_uint32 divisor;
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339
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340 typedef struct
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341 {
181
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342 CYG_RESOLUTION_T_MEMBERS
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343 } cyg_resolution_t;
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344
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345 /* Create a clock object */
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346 void cyg_clock_create(
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347 cyg_resolution_t resolution, /* Initial resolution */
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348 cyg_handle_t *handle, /* Returned clock handle */
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349 cyg_clock *clock /* put clock here */
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350 );
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351
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352 void cyg_clock_delete(cyg_handle_t clock);
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353
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354 /* convert a clock handle to a counter handle so we can use the */
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355 /* counter API on it. */
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356 void cyg_clock_to_counter(
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357 cyg_handle_t clock,
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358 cyg_handle_t *counter
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359 );
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360
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361 void cyg_clock_set_resolution(
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362 cyg_handle_t clock,
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363 cyg_resolution_t resolution /* New resolution */
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364 );
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365
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366 cyg_resolution_t cyg_clock_get_resolution(cyg_handle_t clock);
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367
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368 /* handle of real time clock */
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369 cyg_handle_t cyg_real_time_clock(void);
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370
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371 /* returns value of real time clock's counter.
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372 This is the same as:
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373 (cyg_clock_to_counter(cyg_real_time_clock(), &h),
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374 cyg_counter_current_value(h)) */
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375 cyg_tick_count_t cyg_current_time(void);
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376
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377 /* Alarm handler function */
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378 typedef void cyg_alarm_t(cyg_handle_t alarm, cyg_addrword_t data);
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379
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380 void cyg_alarm_create(
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381 cyg_handle_t counter, /* Attached to this counter */
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382 cyg_alarm_t *alarmfn, /* Call-back function */
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383 cyg_addrword_t data, /* Call-back data */
0
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384 cyg_handle_t *handle, /* Returned alarm object */
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385 cyg_alarm *alarm /* put alarm here */
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386 );
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387
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388 /* Disable alarm, detach from counter and invalidate handles */
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389 void cyg_alarm_delete( cyg_handle_t alarm);
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390
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391 void cyg_alarm_initialize(
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392 cyg_handle_t alarm,
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393 cyg_tick_count_t trigger, /* Absolute trigger time */
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394 cyg_tick_count_t interval /* Relative retrigger interval */
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395 );
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396
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397 void cyg_alarm_enable( cyg_handle_t alarm );
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398
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399 void cyg_alarm_disable( cyg_handle_t alarm );
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400
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401 /*---------------------------------------------------------------------------*/
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402 /* Mail boxes */
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403 void cyg_mbox_create(
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404 cyg_handle_t *handle,
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405 cyg_mbox *mbox
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406 );
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407
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408 void cyg_mbox_delete(cyg_handle_t mbox);
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409
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410 void *cyg_mbox_get(cyg_handle_t mbox);
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411
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412 #ifdef CYGFUN_KERNEL_THREADS_TIMER
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413 void *cyg_mbox_timed_get(
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414 cyg_handle_t mbox,
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415 cyg_tick_count_t abstime
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416 );
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417 #endif
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418
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419 void *cyg_mbox_tryget(cyg_handle_t mbox);
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420
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421 void *cyg_mbox_peek_item(cyg_handle_t mbox);
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422
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423 #ifdef CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT
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424 cyg_bool_t cyg_mbox_put(cyg_handle_t mbox, void *item);
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425 #ifdef CYGFUN_KERNEL_THREADS_TIMER
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426 cyg_bool_t cyg_mbox_timed_put(
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427 cyg_handle_t mbox,
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428 void *item,
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429 cyg_tick_count_t abstime
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430 );
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431 #endif
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432 #endif
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433
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434 cyg_bool_t cyg_mbox_tryput(cyg_handle_t mbox, void *item);
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435
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436 cyg_count32 cyg_mbox_peek(cyg_handle_t mbox);
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437
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438 cyg_bool_t cyg_mbox_waiting_to_get(cyg_handle_t mbox);
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439
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440 cyg_bool_t cyg_mbox_waiting_to_put(cyg_handle_t mbox);
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441
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442
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443 /*-----------------------------------------------------------------------*/
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444 /* Memory pools */
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445
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446 /* These definitions are found in the "memalloc" package as this is */
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447 /* where the implementation lives. */
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448
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449 #include <cyg/memalloc/kapi.h>
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450
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451 /*---------------------------------------------------------------------------*/
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452 /* Semaphores */
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453
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454 void cyg_semaphore_init(
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455 cyg_sem_t *sem, /* Semaphore to init */
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456 cyg_count32 val /* Initial semaphore value */
0
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457 );
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458
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459 void cyg_semaphore_destroy( cyg_sem_t *sem );
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460
115
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461 cyg_bool_t cyg_semaphore_wait( cyg_sem_t *sem );
0
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462
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463 #ifdef CYGFUN_KERNEL_THREADS_TIMER
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464 cyg_bool_t cyg_semaphore_timed_wait(
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465 cyg_sem_t *sem,
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466 cyg_tick_count_t abstime
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467 );
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468 #endif
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469
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470 cyg_bool_t cyg_semaphore_trywait( cyg_sem_t *sem );
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471
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472 void cyg_semaphore_post( cyg_sem_t *sem );
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473
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474 void cyg_semaphore_peek( cyg_sem_t *sem, cyg_count32 *val );
0
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475
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476 /*---------------------------------------------------------------------------*/
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477 /* Flags */
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478
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479 typedef cyg_uint32 cyg_flag_value_t;
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480 typedef cyg_uint8 cyg_flag_mode_t;
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481 #define CYG_FLAG_WAITMODE_AND ((cyg_flag_mode_t)0) /* all bits must be set */
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482 #define CYG_FLAG_WAITMODE_OR ((cyg_flag_mode_t)2) /* any bit must be set */
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483 #define CYG_FLAG_WAITMODE_CLR ((cyg_flag_mode_t)1) /* clear when satisfied */
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484
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485 void cyg_flag_init(
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486 cyg_flag_t *flag /* Flag to init */
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487 );
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488
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489 void cyg_flag_destroy( cyg_flag_t *flag );
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490
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491 /* bitwise-or in the bits in value; awaken any waiting tasks whose
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492 condition is now satisfied */
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493 void cyg_flag_setbits( cyg_flag_t *flag, cyg_flag_value_t value);
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494
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495 /* bitwise-and with the the bits in value; this clears the bits which
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496 are not set in value. No waiting task can be awoken. */
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497 void cyg_flag_maskbits( cyg_flag_t *flag, cyg_flag_value_t value);
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498
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499 /* wait for the flag value to match the pattern, according to the mode.
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500 If mode includes CLR, set the flag value to zero when
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501 our pattern is matched. The return value is that which matched
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502 the request, or zero for an error/timeout return.
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503 Value must not itself be zero. */
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504 cyg_flag_value_t cyg_flag_wait( cyg_flag_t *flag,
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505 cyg_flag_value_t pattern,
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506 cyg_flag_mode_t mode );
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507
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508 #ifdef CYGFUN_KERNEL_THREADS_TIMER
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509 cyg_flag_value_t cyg_flag_timed_wait( cyg_flag_t *flag,
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510 cyg_flag_value_t pattern,
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511 cyg_flag_mode_t mode,
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512 cyg_tick_count_t abstime );
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513
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514 #endif
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515
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516 cyg_flag_value_t cyg_flag_poll( cyg_flag_t *flag,
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517 cyg_flag_value_t pattern,
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518 cyg_flag_mode_t mode );
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519
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520 cyg_flag_value_t cyg_flag_peek( cyg_flag_t *flag );
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521
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522 cyg_bool_t cyg_flag_waiting( cyg_flag_t *flag );
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523
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524 /*---------------------------------------------------------------------------*/
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525 /* Mutex */
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526
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527 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DYNAMIC
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528 enum cyg_mutex_protocol
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529 {
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530 CYG_MUTEX_NONE = 0, // no inversion protocol
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531 CYG_MUTEX_INHERIT, // priority inheritance protocol
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532 CYG_MUTEX_CEILING // priority ceiling protocol
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533 };
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534 #endif
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535
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536 void cyg_mutex_init(
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537 cyg_mutex_t *mutex /* Mutex to init */
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538 );
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539
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540 void cyg_mutex_destroy( cyg_mutex_t *mutex );
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541
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542 cyg_bool_t cyg_mutex_lock( cyg_mutex_t *mutex );
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543
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544 cyg_bool_t cyg_mutex_trylock( cyg_mutex_t *mutex );
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545
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546 void cyg_mutex_unlock( cyg_mutex_t *mutex );
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547
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548 void cyg_mutex_release( cyg_mutex_t *mutex );
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549
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550 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_CEILING
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551 void cyg_mutex_set_ceiling( cyg_mutex_t *mutex, cyg_priority_t priority );
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552 #endif
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553
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554 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DYNAMIC
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555 void cyg_mutex_set_protocol ( cyg_mutex_t *mutex, enum cyg_mutex_protocol protocol );
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556 #endif
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557
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558 /*---------------------------------------------------------------------------*/
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559 /* Condition Variables */
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560
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561 void cyg_cond_init(
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562 cyg_cond_t *cond, /* condition variable to init */
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563 cyg_mutex_t *mutex /* associated mutex */
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564 );
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565
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566 void cyg_cond_destroy( cyg_cond_t *cond );
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567
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568 cyg_bool_t cyg_cond_wait( cyg_cond_t *cond );
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569
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570 void cyg_cond_signal( cyg_cond_t *cond );
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571
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572 void cyg_cond_broadcast( cyg_cond_t *cond );
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573
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574 #ifdef CYGMFN_KERNEL_SYNCH_CONDVAR_TIMED_WAIT
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575 cyg_bool_t cyg_cond_timed_wait(
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576 cyg_cond_t *cond,
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577 cyg_tick_count_t abstime
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578 );
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579 #endif
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580
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581 /*---------------------------------------------------------------------------*/
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582 /* Spinlocks */
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583
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584 void cyg_spinlock_init(
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585 cyg_spinlock_t *lock, /* spinlock to initialize */
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586 cyg_bool_t locked /* init locked or unlocked */
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587 );
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588
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589 void cyg_spinlock_destroy( cyg_spinlock_t *lock );
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590
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591 void cyg_spinlock_spin( cyg_spinlock_t *lock );
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592
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593 void cyg_spinlock_clear( cyg_spinlock_t *lock );
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594
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595 cyg_bool_t cyg_spinlock_try( cyg_spinlock_t *lock );
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596
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597 cyg_bool_t cyg_spinlock_test( cyg_spinlock_t *lock );
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598
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599 void cyg_spinlock_spin_intsave( cyg_spinlock_t *lock,
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600 cyg_addrword_t *istate );
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601
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602 void cyg_spinlock_clear_intsave( cyg_spinlock_t *lock,
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603 cyg_addrword_t istate );
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604
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605 /*---------------------------------------------------------------------------*/
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606 #ifdef __cplusplus
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607 }
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608 #endif
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609
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610 /*---------------------------------------------------------------------------*/
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611
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612 #include <cyg/kernel/kapidata.h>
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613
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614 /*---------------------------------------------------------------------------*/
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615 /* EOF kapi.h */
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616 #endif /* CYGFUN_KERNEL_API_C */
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617 #endif /* CYGONCE_KERNEL_KAPI_H */