[HICN-555, HICN-556] Add loop utility function and fix memory bug in bitmap

A helper function is added to the loop class to allow loop exit after empty event queue. This function is used when running tests.

Signed-off-by: Enrico Loparco (eloparco) <eloparco@cisco.com>
Change-Id: I7bbab32a7d7f53365439f0fba2b9a030d34ac823

4 files changed, 32 insertions, 8 deletions

diff --git a/hicn-light/src/hicn/base/bitmap.h b/hicn-light/src/hicn/base/bitmap.h
index 1159806c8..908b28d87 100644
--- a/hicn-light/src/hicn/base/bitmap.h
+++ b/hicn-light/src/hicn/base/bitmap.h
@@ -100,16 +100,27 @@ bitmap_get(const bitmap_t * bitmap, off_t i)
  *
  * @return bool
  */
+#define bitmap_set(bitmap, i) \
+    _bitmap_set((bitmap_t**)&bitmap, i)
+
+/*
+ * @brief Returns whether the i-th bit is unset (equal to 0) in a bitmap (helper).
+ *
+ * @param[in] bitmap The bitmap to access.
+ * @param[in] i The bit position.
+ *
+ * @return bool
+ */
 static inline
 int
-bitmap_set(bitmap_t * bitmap, off_t i)
+_bitmap_set(bitmap_t ** bitmap, off_t i)
 {
-    if (bitmap_ensure_pos(&bitmap, i) < 0)
+    if (bitmap_ensure_pos(bitmap, i) < 0)
         return -1;
     size_t offset = i / BITMAP_WIDTH(bitmap);
     size_t pos = i % BITMAP_WIDTH(bitmap);
     size_t shift = BITMAP_WIDTH(bitmap) - pos - 1;
-    bitmap[offset] |= 1ul << shift;
+    (*bitmap)[offset] |= 1ul << shift;
     return 0;
 }
 
diff --git a/hicn-light/src/hicn/base/loop.c b/hicn-light/src/hicn/base/loop.c
index 8588b538d..d27e81f5b 100644
--- a/hicn-light/src/hicn/base/loop.c
+++ b/hicn-light/src/hicn/base/loop.c
@@ -97,12 +97,17 @@ void loop_free(loop_t *loop) {
     free(loop);
 }
 
-int loop_dispatch(loop_t *loop)
+int _loop_dispatch(loop_t *loop, int flags)
 {
-    event_base_loop(loop->event_base, EVLOOP_NO_EXIT_ON_EMPTY);
+    event_base_loop(loop->event_base, flags);
     return 0;
 }
 
+int loop_dispatch(loop_t *loop)
+{
+    return _loop_dispatch(loop, EVLOOP_NO_EXIT_ON_EMPTY);
+}
+
 int loop_undispatch(loop_t *loop) { return 0; }
 
 void loop_break(loop_t *loop) { event_base_loopbreak(loop->event_base); }
diff --git a/hicn-light/src/hicn/base/loop.h b/hicn-light/src/hicn/base/loop.h
index 697021175..544d73cd7 100644
--- a/hicn-light/src/hicn/base/loop.h
+++ b/hicn-light/src/hicn/base/loop.h
@@ -52,7 +52,15 @@ loop_t *loop_create();
 void loop_free(loop_t *loop);
 
 /**
- * \brief Runs the loop instance to process events
+ * \brief Runs the loop instance to process events (helper).
+ * \param [in] loop - Pointer to the loop instance
+ * \param [in] flags - Loop mode: EVLOOP_ONCE, EVLOOP_NONBLOCK or EVLOOP_NO_EXIT_ON_EMPTY
+ * \return 0 if successful, -1 otherwise
+ */
+int _loop_dispatch(loop_t *loop, int flags);
+
+/**
+ * \brief Runs the loop instance to process events.
  * \param [in] loop - Pointer to the loop instance
  * \return 0 if successful, -1 otherwise
  */
diff --git a/hicn-light/src/hicn/base/test/test-loop.cc b/hicn-light/src/hicn/base/test/test-loop.cc
index c86ccd5e6..d50b2472a 100644
--- a/hicn-light/src/hicn/base/test/test-loop.cc
+++ b/hicn-light/src/hicn/base/test/test-loop.cc
@@ -229,7 +229,7 @@ TEST_F(LoopTest, TimerCreateAndCancel)
     ret = loop_timer_register(timer2, timer_tick_ / 2);
     EXPECT_TRUE(ret >= 0);
 
-    loop_dispatch(loop_);
+    _loop_dispatch(loop_, 0);
 
     loop_undispatch(loop_);
 
@@ -266,7 +266,7 @@ TEST_F(LoopTest, LoopDispatch)
     EXPECT_TRUE(ret >= 0);
 
     // Start event dispatching
-    loop_dispatch(loop_);
+    _loop_dispatch(loop_, 0);
 
     // Stop dispatching
     loop_undispatch(loop_);