Revision 0:415636fc0dc3, committed 2018-11-27

Comitter:

frunzl

Date:

Tue Nov 27 21:53:00 2018 +0000

Commit message:

assignment;

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Nov 27 21:53:00 2018 +0000
@@ -0,0 +1,74 @@
+#include "mbed.h"
+#define QUEUE_SIZE 5
+Mutex mutex1;
+Mutex mutex2;
+ConditionVariable full(mutex1);
+ConditionVariable empty(mutex2);
+Thread producer;
+Thread consumer;
+
+
+typedef struct {
+    uint8_t counter;   /* A counter value               */
+} element_t;
+
+
+MemoryPool<element_t, QUEUE_SIZE> mpool;
+Queue<element_t, QUEUE_SIZE> queue;
+volatile int in_queue_elements = 0;
+
+
+
+void producer_thread(void) {
+    while (1) {
+      mutex1.lock();
+      if (in_queue_elements == QUEUE_SIZE) {
+        full.wait();    
+      }
+      element_t *element = mpool.alloc();
+      element->counter = in_queue_elements+1; 
+      queue.put(element);
+      in_queue_elements++;
+      printf("++There are %d elements in the queue\n", in_queue_elements);
+      if (in_queue_elements == 1) {
+        full.notify_all();
+      }
+      mutex1.unlock();
+      if (rand() % 10 < 2) {
+            wait(rand()%2);
+    }
+    }
+}
+
+void consumer_thread(void) {
+    while (1) {
+        mutex1.lock();
+        if (in_queue_elements == 0) {
+          full.wait();    
+        }
+        osEvent evt = queue.get();
+        if (evt.status == osEventMessage) {
+          element_t *element = (element_t*)evt.value.p;
+          printf("Got element: %u\n", element->counter);
+          mpool.free(element);
+          in_queue_elements--;
+        }
+        
+        printf("--There are %d elements in the queue\n", in_queue_elements);
+        if (in_queue_elements == QUEUE_SIZE-1) {
+          full.notify_all();   
+        }    
+        mutex1.unlock();
+        if (rand() % 10 < 2) {
+            wait(rand()%2);
+        }
+    }
+}
+
+int main() {
+    // Create a thread to execute the function led2_thread
+    producer.start(producer_thread);
+    consumer.start(consumer_thread);
+    // Now led2_thread is executing concurrently with main at this point
+
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Tue Nov 27 21:53:00 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/armmbed/mbed-os/#bf6f2c3c6434a6de9eb9511feffa5948b3d1f20f