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王立帮
252
arduino-cli/libraries/CoopTask/examples/mutex/mutex.ino
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252
arduino-cli/libraries/CoopTask/examples/mutex/mutex.ino
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/*
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Name: mutex.ino
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Created: 2019-08-04 22:40:11
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Author: dok@dok-net.net
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*/
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#include <CoopTask.h>
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#include <CoopSemaphore.h>
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#include <CoopMutex.h>
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#define USE_BUILTIN_TASK_SCHEDULER
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CoopMutex serialMutex;
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CoopMutex mutex;
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CoopTaskBase* hasMutex(nullptr);
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void haveMutex()
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{
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if (hasMutex)
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.print(F(" called haveMutex, despite "));
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Serial.print(hasMutex->name());
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Serial.println(F(" is known to have mutex."));
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return;
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}
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hasMutex = CoopTaskBase::self();
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}
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void yieldMutex()
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{
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if (hasMutex != CoopTaskBase::self())
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.println(F(" called yieldMutex, but no task currently has the mutex."));
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return;
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}
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hasMutex = nullptr;
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}
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CoopTask<int>* firstTask;
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CoopTask<int>* secondTask;
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CoopTask<int>* thirdTask;
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void setup() {
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#ifdef ESP8266
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Serial.begin(74880);
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#else
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Serial.begin(115200);
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#endif
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while (!Serial) {}
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delay(500);
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Serial.println(F("Mutex test"));
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#if defined(ESP8266) && defined(USE_BUILTIN_TASK_SCHEDULER)
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CoopTaskBase::useBuiltinScheduler();
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#endif
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firstTask = createCoopTask(F("first"), []()
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{
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.println(F(" starts"));
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}
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for (int i = 0; i < 30; ++i)
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{
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.println(F(" locks mutex"));
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}
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{
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CoopMutexLock lock(mutex);
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if (!lock) {
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CoopMutexLock serialLock(serialMutex);
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Serial.print(F("failed to lock mutex in "));
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Serial.println(CoopTaskBase::self()->name());
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}
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haveMutex();
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.println(F(" has mutex"));
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}
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yield();
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yieldMutex();
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}
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.print(F(" runs ("));
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Serial.print(i);
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Serial.println(')');
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}
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yield();
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}
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CoopMutexLock serialLock(serialMutex);
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Serial.print(F("exiting from task "));
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Serial.println(CoopTaskBase::self()->name());
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return 0;
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}
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#if defined(ESP8266) || defined(ESP32)
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);
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#else
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, 0x120);
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#endif
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if (!firstTask) Serial.println(F("firstTask not created"));
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secondTask = createCoopTask(F("second"), []()
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{
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.println(F(" starts"));
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}
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for (int i = 0; i < 30; ++i)
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{
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.println(F(" locks mutex"));
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}
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{
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CoopMutexLock lock(mutex);
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if (!lock) {
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CoopMutexLock serialLock(serialMutex);
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Serial.print(F("failed to lock mutex in "));
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Serial.println(CoopTaskBase::self()->name());
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}
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haveMutex();
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.println(F(" has mutex"));
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}
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yield();
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yieldMutex();
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}
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.print(F(" runs ("));
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Serial.print(i);
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Serial.println(')');
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}
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yield();
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}
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CoopMutexLock serialLock(serialMutex);
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Serial.print(F("exiting from task "));
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Serial.println(CoopTaskBase::self()->name());
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return 0;
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}
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#if defined(ESP8266) || defined(ESP32)
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);
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#else
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, 0x120);
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#endif
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if (!secondTask) Serial.println(F("secondTask not created"));
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thirdTask = createCoopTask(F("third"), []()
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{
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.println(F(" starts"));
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}
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for (int i = 0; i < 10; ++i)
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{
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.println(F(" locks mutex"));
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}
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{
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CoopMutexLock lock(mutex);
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if (!lock) {
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CoopMutexLock serialLock(serialMutex);
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Serial.print(F("failed to lock mutex in "));
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Serial.println(CoopTaskBase::self()->name());
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}
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haveMutex();
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.println(F(" has mutex"));
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}
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yield();
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yieldMutex();
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}
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.print(F(" runs ("));
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Serial.print(i);
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Serial.println(')');
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}
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yield();
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}
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for (int i = 0; i < 10; ++i)
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{
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{
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CoopMutexLock serialLock(serialMutex);
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Serial.print(CoopTaskBase::self()->name());
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Serial.print(F(" still runs ("));
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Serial.print(i);
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Serial.println(')');
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}
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yield();
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}
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CoopMutexLock serialLock(serialMutex);
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Serial.print(F("exiting from task "));
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Serial.println(CoopTaskBase::self()->name());
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return 0;
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}
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#if defined(ESP8266) || defined(ESP32)
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);
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#else
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, 0x120);
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#endif
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if (!thirdTask) Serial.println(F("thirdTask not created"));
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#ifdef ESP32
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Serial.print(F("Loop free stack = ")); Serial.println(uxTaskGetStackHighWaterMark(NULL));
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#endif
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}
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void taskReaper(const CoopTaskBase* const task)
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{
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delete task;
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}
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// the loop function runs over and over again until power down or reset
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void loop()
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{
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#if defined(ESP8266) && defined(USE_BUILTIN_TASK_SCHEDULER)
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if (firstTask && !*firstTask)
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{
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taskReaper(firstTask); firstTask = nullptr;
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}
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if (secondTask && !*secondTask)
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{
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taskReaper(secondTask); secondTask = nullptr;
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}
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if (thirdTask && !*thirdTask)
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{
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taskReaper(thirdTask); thirdTask = nullptr;
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}
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#else
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runCoopTasks(taskReaper);
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#endif
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}
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