Save allocator for RCL_CLOCK_UNINITIALIZED clock. (#623)

* Save allocator when setting uninitialized clock
* Add tests for clock types init/fini
* Remove extra calls to set clock allocator
* Remove tests not related to this PR
* Replace test to make it clearer what is tested in the PR

Signed-off-by: Jorge Perez <jjperez@ekumenlabs.com>

rcl/src/rcl/time.c

@@ -48,13 +48,14 @@ rcl_get_system_time(void * data, rcl_time_point_value_t * current_time)
 
 // Internal method for zeroing values on init, assumes clock is valid
 static void
-rcl_init_generic_clock(rcl_clock_t * clock)
+rcl_init_generic_clock(rcl_clock_t * clock, rcl_allocator_t * allocator)
 {
   clock->type = RCL_CLOCK_UNINITIALIZED;
   clock->jump_callbacks = NULL;
   clock->num_jump_callbacks = 0u;
   clock->get_now = NULL;
   clock->data = NULL;
+  clock->allocator = *allocator;
 }
 
 // The function used to get the current ros time.
@@ -91,7 +92,7 @@ rcl_clock_init(
   switch (clock_type) {
     case RCL_CLOCK_UNINITIALIZED:
       RCL_CHECK_ARGUMENT_FOR_NULL(clock, RCL_RET_INVALID_ARGUMENT);
-      rcl_init_generic_clock(clock);
+      rcl_init_generic_clock(clock, allocator);
       return RCL_RET_OK;
     case RCL_ROS_TIME:
       return rcl_ros_clock_init(clock, allocator);
@@ -144,7 +145,7 @@ rcl_ros_clock_init(
 {
   RCL_CHECK_ARGUMENT_FOR_NULL(clock, RCL_RET_INVALID_ARGUMENT);
   RCL_CHECK_ARGUMENT_FOR_NULL(allocator, RCL_RET_INVALID_ARGUMENT);
-  rcl_init_generic_clock(clock);
+  rcl_init_generic_clock(clock, allocator);
   clock->data = allocator->allocate(sizeof(rcl_ros_clock_storage_t), allocator->state);
   if (NULL == clock->data) {
     RCL_SET_ERROR_MSG("allocating memory failed");
@@ -157,7 +158,6 @@ rcl_ros_clock_init(
   storage->active = false;
   clock->get_now = rcl_get_ros_time;
   clock->type = RCL_ROS_TIME;
-  clock->allocator = *allocator;
   return RCL_RET_OK;
 }
 
@@ -186,10 +186,9 @@ rcl_steady_clock_init(
 {
   RCL_CHECK_ARGUMENT_FOR_NULL(clock, RCL_RET_INVALID_ARGUMENT);
   RCL_CHECK_ARGUMENT_FOR_NULL(allocator, RCL_RET_INVALID_ARGUMENT);
-  rcl_init_generic_clock(clock);
+  rcl_init_generic_clock(clock, allocator);
   clock->get_now = rcl_get_steady_time;
   clock->type = RCL_STEADY_TIME;
-  clock->allocator = *allocator;
   return RCL_RET_OK;
 }
 
@@ -213,10 +212,9 @@ rcl_system_clock_init(
 {
   RCL_CHECK_ARGUMENT_FOR_NULL(clock, RCL_RET_INVALID_ARGUMENT);
   RCL_CHECK_ARGUMENT_FOR_NULL(allocator, RCL_RET_INVALID_ARGUMENT);
-  rcl_init_generic_clock(clock);
+  rcl_init_generic_clock(clock, allocator);
   clock->get_now = rcl_get_system_time;
   clock->type = RCL_SYSTEM_TIME;
-  clock->allocator = *allocator;
   return RCL_RET_OK;
 }
 

rcl/test/rcl/test_time.cpp

@@ -263,11 +263,11 @@ TEST(CLASSNAME(rcl_time, RMW_IMPLEMENTATION), specific_clock_instantiation) {
   rcl_allocator_t allocator = rcl_get_default_allocator();
   {
     rcl_clock_t uninitialized_clock;
-    rcl_ret_t ret = rcl_clock_init(
-      RCL_CLOCK_UNINITIALIZED, &uninitialized_clock, &allocator);
+    rcl_ret_t ret = rcl_clock_init(RCL_CLOCK_UNINITIALIZED, &uninitialized_clock, &allocator);
     EXPECT_EQ(ret, RCL_RET_OK) << rcl_get_error_string().str;
     EXPECT_EQ(uninitialized_clock.type, RCL_CLOCK_UNINITIALIZED) <<
       "Expected time source of type RCL_CLOCK_UNINITIALIZED";
+    EXPECT_TRUE(rcutils_allocator_is_valid(&(uninitialized_clock.allocator)));
   }
   {
     rcl_clock_t ros_clock;