| 1 | // %flair:license{
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| 2 | // This file is part of the Flair framework distributed under the
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| 3 | // CECILL-C License, Version 1.0.
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| 4 | // %flair:license}
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| 5 | // created: 2012/10/04
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| 6 | // filename: Thread_impl.cpp
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| 7 | //
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| 8 | // author: Guillaume Sanahuja
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| 9 | // Copyright Heudiasyc UMR UTC/CNRS 7253
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| 10 | //
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| 11 | // version: $Id: $
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| 12 | //
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| 13 | // purpose: classe implementant un thread rt ou non
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| 14 | //
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| 15 | //
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| 16 | /*********************************************************************/
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| 17 |
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| 18 | #include "Thread_impl.h"
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| 19 | #include "Thread.h"
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| 20 | #include "IODevice.h"
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| 21 | #include "IODevice_impl.h"
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| 22 | #include "ConditionVariable.h"
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| 23 | #include "config.h"
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| 24 | #include "FrameworkManager.h"
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| 25 | #include <string.h>
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| 26 | #ifdef __XENO__
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| 27 | #include <rtdk.h>
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| 28 | #else
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| 29 | #include <sys/resource.h>
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| 30 | #endif
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| 31 |
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| 32 | using std::string;
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| 33 | using namespace flair::core;
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| 34 |
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| 35 | Thread_impl::Thread_impl(Thread *self, uint8_t priority) {
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| 36 | isRunning = false;
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| 37 | tobestopped = false;
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| 38 | is_suspended = false;
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| 39 | period_set = false;
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| 40 |
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| 41 | this->self = self;
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| 42 | cond = new ConditionVariable(self, self->ObjectName());
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| 43 |
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| 44 | if (priority < MIN_THREAD_PRIORITY) {
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| 45 | priority = MIN_THREAD_PRIORITY;
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| 46 | // printf("Thread::Thread, %s: priority set to
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| 47 | // %i\n",self->ObjectName().c_str(), priority);
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| 48 | }
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| 49 | if (priority > MAX_THREAD_PRIORITY) {
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| 50 | priority = MAX_THREAD_PRIORITY;
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| 51 | self->Warn("priority set to %i\n", MAX_THREAD_PRIORITY);
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| 52 | }
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| 53 |
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| 54 | this->priority = priority;
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| 55 | period = 100 * 1000 * 1000; // 100ms par defaut
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| 56 | min_jitter = 1000 * 1000 * 1000;
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| 57 | max_jitter = 0;
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| 58 | mean_jitter = 0;
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| 59 | last = 0;
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| 60 | cpt = 0;
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| 61 | }
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| 62 |
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| 63 | Thread_impl::~Thread_impl() {
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| 64 | SafeStop();
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| 65 | Join();
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| 66 | }
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| 67 |
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| 68 | void Thread_impl::Start(void) {
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| 69 | int status;
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| 70 |
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| 71 | isRunning = true;
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| 72 |
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| 73 | #ifdef __XENO__
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| 74 | string th_name =
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| 75 | getFrameworkManager()->ObjectName() + "-" + self->ObjectName();
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| 76 |
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| 77 | #ifdef RT_STACK_SIZE
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| 78 | status = rt_task_create(&task_rt, th_name.c_str(), RT_STACK_SIZE,
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| 79 | (int)priority, T_JOINABLE);
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| 80 | #else
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| 81 | status =
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| 82 | rt_task_create(&task_rt, th_name.c_str(), 0, (int)priority, T_JOINABLE);
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| 83 | #endif // RT_STACK_SIZE
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| 84 | if (status != 0) {
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| 85 | self->Err("rt_task_create error (%s)\n", strerror(-status));
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| 86 | } else {
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| 87 | //_printf("rt_task_create ok %s\n",th_name);
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| 88 | }
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| 89 |
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| 90 | status = rt_task_start(&task_rt, &main_rt, (void *)this);
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| 91 | if (status != 0) {
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| 92 | self->Err("rt_task_start error (%s)\n", strerror(-status));
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| 93 | } else {
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| 94 | //_printf("rt_task_start ok %s\n",th_name);
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| 95 | }
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| 96 |
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| 97 | // Initialise the rt_print buffer for this task explicitly
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| 98 | rt_print_init(512, th_name.c_str());
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| 99 |
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| 100 | #else //__XENO__
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| 101 |
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| 102 | // Initialize thread creation attributes
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| 103 | pthread_attr_t attr;
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| 104 | if (pthread_attr_init(&attr) != 0) {
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| 105 | self->Err("Error pthread_attr_init\n");
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| 106 | }
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| 107 |
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| 108 | #ifdef NRT_STACK_SIZE
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| 109 | if (pthread_attr_setstacksize(&attr, NRT_STACK_SIZE) != 0) {
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| 110 | self->Err("Error pthread_attr_setstacksize\n");
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| 111 | }
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| 112 | #endif // NRT_STACK_SIZE
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| 113 |
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| 114 | if (pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED) != 0) {
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| 115 | self->Err("Error pthread_attr_setinheritsched\n");
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| 116 | }
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| 117 |
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| 118 | if (pthread_attr_setschedpolicy(&attr, SCHED_FIFO) != 0) {
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| 119 | self->Err("Error pthread_attr_setschedpolicy\n");
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| 120 | }
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| 121 |
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| 122 | struct sched_param parm;
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| 123 | parm.sched_priority = priority;
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| 124 | if (pthread_attr_setschedparam(&attr, &parm) != 0) {
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| 125 | self->Err("Error pthread_attr_setschedparam\n");
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| 126 | }
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| 127 |
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| 128 | next_time = GetTime() + period;
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| 129 |
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| 130 | if (pthread_create(&task_nrt, &attr, main_nrt, (void *)this) != 0) {
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| 131 | self->Err("pthread_create error\n");
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| 132 | }
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| 133 |
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| 134 | if (pthread_attr_destroy(&attr) != 0) {
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| 135 | self->Err("Error pthread_attr_destroy\n");
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| 136 | }
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| 137 |
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| 138 | #endif //__XENO__
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| 139 | }
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| 140 |
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| 141 | #ifdef __XENO__
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| 142 | void Thread_impl::main_rt(void *arg) {
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| 143 | Thread_impl *caller = (Thread_impl *)arg;
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| 144 |
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| 145 | // Perform auto-init of rt_print buffers if the task doesn't do so
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| 146 | rt_print_auto_init(1);
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| 147 |
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| 148 | caller->self->Run();
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| 149 |
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| 150 | caller->PrintStats();
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| 151 | }
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| 152 | #else
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| 153 | void *Thread_impl::main_nrt(void *arg) {
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| 154 | Thread_impl *caller = (Thread_impl *)arg;
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| 155 |
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| 156 | caller->self->Run();
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| 157 |
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| 158 | caller->PrintStats();
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| 159 |
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| 160 | pthread_exit(0);
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| 161 | }
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| 162 | #endif //__XENO__
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| 163 |
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| 164 | void Thread_impl::SetPeriodUS(uint32_t period) {
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| 165 | if (period == 0) {
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| 166 | self->Err("Period must be>0\n");
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| 167 | return;
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| 168 | }
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| 169 |
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| 170 | #ifdef __XENO__
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| 171 | int status = rt_task_set_periodic(&task_rt, TM_NOW, period * 1000);
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| 172 | if (status != 0)
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| 173 | self->Err("Error rt_task_set_periodic %s\n", strerror(-status));
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| 174 | #else
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| 175 | next_time -= period;
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| 176 | next_time += period * 1000;
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| 177 | #endif
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| 178 | this->period = period * 1000;
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| 179 | period_set = true;
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| 180 | }
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| 181 |
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| 182 | uint32_t Thread_impl::GetPeriodUS() const { return this->period / 1000; }
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| 183 |
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| 184 | void Thread_impl::SetPeriodMS(uint32_t period) {
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| 185 | if (period == 0) {
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| 186 | self->Err("Period must be>0\n");
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| 187 | return;
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| 188 | }
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| 189 |
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| 190 | #ifdef __XENO__
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| 191 | int status = rt_task_set_periodic(&task_rt, TM_NOW, period * 1000 * 1000);
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| 192 | if (status != 0)
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| 193 | self->Err("Error rt_task_set_periodic %s\n", strerror(-status));
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| 194 | #else
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| 195 | next_time -= period;
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| 196 | next_time += period * 1000 * 1000;
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| 197 | #endif
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| 198 | this->period = period * 1000 * 1000;
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| 199 | period_set = true;
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| 200 | }
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| 201 |
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| 202 | uint32_t Thread_impl::GetPeriodMS() const { return this->period / 1000 / 1000; }
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| 203 |
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| 204 | void Thread_impl::WaitPeriod(void) {
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| 205 | if (period_set == false) {
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| 206 | self->Err("Period must be set befaore calling this method\n");
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| 207 | return;
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| 208 | }
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| 209 | #ifdef __XENO__
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| 210 | unsigned long overruns_r;
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| 211 | int status = rt_task_wait_period(&overruns_r);
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| 212 | if (status != 0)
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| 213 | self->Err("Error rt_task_wait_period %s\n", strerror(-status));
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| 214 | if (status == -ETIMEDOUT)
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| 215 | self->Err("overrun: %lld\n", overruns_r);
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| 216 | #else
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| 217 | self->SleepUntil(next_time);
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| 218 | next_time += period;
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| 219 | #endif
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| 220 | ComputeJitter(GetTime());
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| 221 | }
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| 222 |
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| 223 | void Thread_impl::Suspend(void) {
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| 224 | if (isRunning == false) {
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| 225 | self->Err("thread is not started\n");
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| 226 | return;
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| 227 | }
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| 228 |
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| 229 | cond->GetMutex(), is_suspended = true;
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| 230 | cond->CondWait();
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| 231 | is_suspended = false;
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| 232 | cond->ReleaseMutex();
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| 233 | }
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| 234 |
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| 235 | bool Thread_impl::SuspendUntil(Time date) {
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| 236 | if (isRunning == false) {
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| 237 | self->Err("thread is not started\n");
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| 238 | return false;
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| 239 | }
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| 240 |
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| 241 | cond->GetMutex(), is_suspended = true;
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| 242 | bool success = cond->CondWaitUntil(date);
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| 243 | is_suspended = false;
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| 244 | cond->ReleaseMutex();
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| 245 | return success;
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| 246 | }
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| 247 |
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| 248 | bool Thread_impl::IsSuspended(void) {
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| 249 | bool result;
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| 250 |
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| 251 | cond->GetMutex();
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| 252 | result = is_suspended;
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| 253 | cond->ReleaseMutex();
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| 254 |
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| 255 | return result;
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| 256 | }
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| 257 |
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| 258 | void Thread_impl::Resume(void) {
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| 259 | if (isRunning == false) {
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| 260 | self->Err("thread is not started\n");
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| 261 | return;
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| 262 | }
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| 263 |
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| 264 | cond->GetMutex();
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| 265 | if (is_suspended == true) {
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| 266 | cond->CondSignal();
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| 267 | } else {
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| 268 | self->Err("thread is not suspended\n");
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| 269 | }
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| 270 | cond->ReleaseMutex();
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| 271 | }
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| 272 |
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| 273 | int Thread_impl::WaitUpdate(const IODevice *device) {
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| 274 | int status = 0;
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| 275 |
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| 276 | if (IsSuspended() == true) {
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| 277 | self->Err("thread is already supended\n");
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| 278 | status = -1;
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| 279 | } else {
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| 280 | cond->GetMutex();
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| 281 |
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| 282 | if (device->pimpl_->SetToWake(self) == 0) {
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| 283 | is_suspended = true;
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| 284 | cond->CondWait();
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| 285 | is_suspended = false;
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| 286 | } else {
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| 287 | self->Err("%s is already waiting an update\n",
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| 288 | device->ObjectName().c_str());
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| 289 | status = -1;
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| 290 | }
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| 291 |
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| 292 | cond->ReleaseMutex();
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| 293 | }
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| 294 |
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| 295 | return status;
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| 296 | }
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| 297 |
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| 298 | void Thread_impl::PrintStats(void) {
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| 299 | #ifdef __XENO__
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| 300 | RT_TASK_INFO info;
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| 301 |
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| 302 | int status = rt_task_inquire(NULL, &info);
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| 303 | if (status != 0) {
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| 304 | self->Err("Error rt_task_inquire %s\n", strerror(-status));
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| 305 | } else
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| 306 | #endif
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| 307 | {
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| 308 | #ifndef __XENO__
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| 309 | // if(last!=0)
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| 310 | #endif
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| 311 | { Printf("Thread::%s :\n", self->ObjectName().c_str()); }
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| 312 | #ifdef __XENO__
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| 313 | Printf(" number of context switches: %i\n", info.ctxswitches);
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| 314 | Printf(" number of primary->secondary mode switch: %i\n",
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| 315 | info.modeswitches);
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| 316 | // printf("number of page faults: %i\n",info.pagefaults);
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| 317 | Printf(" execution time (ms) in primary mode: %lld\n",
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| 318 | info.exectime / 1000000);
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| 319 | #else
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| 320 | /*
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| 321 | struct rusage r_usage;
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| 322 | getrusage(RUSAGE_THREAD,&r_usage);
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| 323 | printf(" memory usage = %ld\n",r_usage.ru_maxrss);
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| 324 | printf("RUSAGE :ru_utime => %lld [sec] : %lld [usec], :ru_stime => %lld
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| 325 | [sec] : %lld [usec] \n",
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| 326 | (int64_t)r_usage.ru_utime.tv_sec, (int64_t)r_usage.ru_utime.tv_usec,
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| 327 | (int64_t)r_usage.ru_stime.tv_sec,
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| 328 | (int64_t)r_usage.ru_stime.tv_usec);*/
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| 329 | #endif
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| 330 | if (last != 0) {
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| 331 | Printf(" min jitter (ns): %lld\n", min_jitter);
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| 332 | Printf(" max jitter (ns): %lld\n", max_jitter);
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| 333 | Printf(" jitter moy (ns): %lld\n", mean_jitter / cpt);
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| 334 | Printf(" itertions: %lld\n", cpt);
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| 335 | }
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| 336 | }
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| 337 | }
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| 338 |
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| 339 | void Thread_impl::Join(void) {
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| 340 | if (isRunning == true) {
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| 341 | int status;
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| 342 |
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| 343 | #ifdef __XENO__
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| 344 | status = rt_task_join(&task_rt);
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| 345 | #else
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| 346 | status = pthread_join(task_nrt, NULL);
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| 347 | #endif
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| 348 | if (status != 0)
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| 349 | self->Err("error %s\n", strerror(-status));
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| 350 | isRunning = false;
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| 351 | }
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| 352 | }
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| 353 |
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| 354 | void Thread_impl::ComputeJitter(Time time) {
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| 355 | Time diff, delta;
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| 356 | diff = time - last;
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| 357 |
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| 358 | if (diff >= period) {
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| 359 | delta = diff - period;
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| 360 | } else {
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| 361 | delta = period - diff;
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| 362 | }
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| 363 | // if(delta==0) rt_printf("%lld %lld\n",time,last);
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| 364 | last = time;
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| 365 | if (diff == time)
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| 366 | return;
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| 367 |
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| 368 | if (delta > max_jitter)
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| 369 | max_jitter = delta;
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| 370 | if (delta < min_jitter)
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| 371 | min_jitter = delta;
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| 372 | mean_jitter += delta;
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| 373 | cpt++;
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| 374 |
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| 375 | // Printf("Thread::%s jitter moy (ns):
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| 376 | // %lld\n",self->ObjectName().c_str(),mean_jitter/cpt);
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| 377 | }
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| 378 |
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| 379 | void Thread_impl::SafeStop(void) {
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| 380 | tobestopped = true;
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| 381 | if (IsSuspended())
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| 382 | Resume();
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| 383 | }
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| 384 |
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| 385 | bool Thread_impl::ToBeStopped(void) { return tobestopped; }
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