From 7ddb241b20b219dc4069d455d0a69b9f5e80d761 Mon Sep 17 00:00:00 2001
From: Robert Gustafsson <robg@student.chalmers.se>
Date: Sat, 14 Oct 2017 14:48:28 +0200
Subject: Add statistics after SIGINT

---
 broccoli/includes/types.h |  4 ++++
 broccoli/src/fifoqueue.c  | 11 +++++++++++
 broccoli/src/midbro.c     | 30 ++++++++++++++++++++++++++++--
 3 files changed, 43 insertions(+), 2 deletions(-)

diff --git a/broccoli/includes/types.h b/broccoli/includes/types.h
index d2cf19e..b23da1a 100644
--- a/broccoli/includes/types.h
+++ b/broccoli/includes/types.h
@@ -25,6 +25,10 @@ struct fifo_q{
     Queue_t * tail;
     int maxSize;
     int currentSize;
+    int droppedValues;
+    int largestBufferSize;
+    int valuesReceived;
+    int valuesReleased;
     sem_t bufferEmptyBlock;
     sem_t lock;
 };
diff --git a/broccoli/src/fifoqueue.c b/broccoli/src/fifoqueue.c
index 9b4b75e..6a99740 100644
--- a/broccoli/src/fifoqueue.c
+++ b/broccoli/src/fifoqueue.c
@@ -13,6 +13,10 @@ init_queue(int size)
     q->tail = NULL;
     q->maxSize = size;
     q->currentSize = 0;
+    q->droppedValues = 0;
+    q->largestBufferSize = 0;
+    q->valuesReceived = 0;
+    q->valuesReleased = 0;
     /*Queue empty from the beginning (block)*/
     sem_init(&q->bufferEmptyBlock, 0, 0);
     sem_init(&q->lock, 0, 1);
@@ -50,6 +54,7 @@ add_to_queue(Fifo_q * q, Sensor_t * sensor)
         #ifdef DLR
             pop_from_queue(q);
         #endif
+        q->droppedValues++;
         return 0;
     }
     sem_wait(&q->lock);
@@ -63,6 +68,9 @@ add_to_queue(Fifo_q * q, Sensor_t * sensor)
         q->tail->next = new_elem;
     q->tail = new_elem;
     q->currentSize++;
+    q->valuesReceived++;
+    if(q->currentSize > q->largestBufferSize)
+        q->largestBufferSize = q->currentSize;
     sem_post(&q->lock);
     return 1;
 }
@@ -93,6 +101,9 @@ pop_from_queue(Fifo_q * q)
     }
     free(head);
     q->currentSize--;
+    #ifndef DLR
+    q->valuesReleased++;
+    #endif
     sem_post(&q->lock);
     return sensor;
 } 
diff --git a/broccoli/src/midbro.c b/broccoli/src/midbro.c
index 6c83207..e2f9644 100644
--- a/broccoli/src/midbro.c
+++ b/broccoli/src/midbro.c
@@ -1,5 +1,6 @@
 #include <pthread.h>
 #include <unistd.h>
+#include <signal.h>
 #include "fifoqueue.h"
 #include "broevent.h"
 #include "midbro.h"
@@ -8,7 +9,24 @@
 #endif
 
 Fifo_q * queue;
+pthread_t event_listener;
+sigset_t signal_set;
 
+    void
+sigint_handler(int signal)
+{
+    printf("\nStatistics:\n"
+            "Total values received: %d\n"
+            "Total values dropped: %d\n"
+            "Total values released: %d\n"
+            "Maximum buffer utilization: %d\n"
+            "Buffer fixed size: %d\n"
+            "Buffer size upon termination: %d\n",
+            queue->valuesReceived, queue->droppedValues,
+            queue->valuesReleased, queue->largestBufferSize,
+            queue->maxSize, queue->currentSize);
+    exit(0);
+}
     void
 request_n_values(int number, int arrayOfValues[])
 {
@@ -37,12 +55,20 @@ request_value()
 start_data_capture()
 {
     int res;
-    queue = init_queue(500000); /* Initiate queue with fixed size */
-    pthread_t event_listener;
+    queue = init_queue(500); /* Initiate queue with fixed size */
     /* Create producer thread that listen for bro events */
+    sigemptyset(&signal_set);
+    sigaddset(&signal_set, SIGINT);
+    res = pthread_sigmask(SIG_BLOCK, &signal_set, NULL);
+    if(res != 0)
+        perror("SIGINT block");
     res = pthread_create(&event_listener, NULL, bro_event_listener, queue);
     if(res){
         perror("Unable to create thread");
         exit(-1);
     }
+    res = pthread_sigmask(SIG_UNBLOCK, &signal_set, NULL);
+    if(res != 0)
+        perror("SIGINT unblock");
+    signal(SIGINT, sigint_handler);
 }
-- 
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