fixup comments on #endif statements

rcl/src/rcl/common.c

@@ -24,7 +24,7 @@ extern "C"
 #if defined(WIN32)
 #define WINDOWS_ENV_BUFFER_SIZE 2048
 static char __env_buffer[WINDOWS_ENV_BUFFER_SIZE];
-#endif
+#endif  // defined(WIN32)
 
 rcl_ret_t
 rcl_impl_getenv(const char * env_name, const char ** env_value)
@@ -37,7 +37,7 @@ rcl_impl_getenv(const char * env_name, const char ** env_value)
   if (*env_value == NULL) {
     *env_value = "";
   }
-#else
+#else  // !defined(WIN32)
   size_t required_size;
   errno_t ret = getenv_s(&required_size, __env_buffer, sizeof(__env_buffer), env_name);
   if (ret != 0) {
@@ -46,7 +46,7 @@ rcl_impl_getenv(const char * env_name, const char ** env_value)
   }
   __env_buffer[WINDOWS_ENV_BUFFER_SIZE - 1] = '\0';
   *env_value = __env_buffer;
-#endif
+#endif  // !defined(WIN32)
   return RCL_RET_OK;
 }
 

rcl/src/rcl/time.c

@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef WIN32
+#if defined(WIN32)
 #include "./time_win32.c"
-#else
+#else  // defined(WIN32)
 #include "./time_unix.c"
-#endif
+#endif  // defined(WIN32)

rcl/src/rcl/time_unix.c

@@ -12,9 +12,9 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef WIN32
+#if defined(WIN32)
 #error time_unix.c is not intended to be used with win32 based systems
-#endif
+#endif  // defined(WIN32)
 
 #if __cplusplus
 extern "C"
@@ -26,7 +26,7 @@ extern "C"
 #if defined(__MACH__)
 #include <mach/clock.h>
 #include <mach/mach.h>
-#endif
+#endif  // defined(__MACH__)
 #include <math.h>
 #include <time.h>
 #include <unistd.h>
@@ -37,10 +37,10 @@ extern "C"
 #if !defined(__MACH__)  // Assume clock_get_time is available on OS X.
 // This id an appropriate check for clock_gettime() according to:
 //   http://man7.org/linux/man-pages/man2/clock_gettime.2.html
-#if (!defined(_POSIX_TIMERS) || !_POSIX_TIMERS)
+#if !defined(_POSIX_TIMERS) || !_POSIX_TIMERS
 #error no monotonic clock function available
-#endif
-#endif
+#endif  // !defined(_POSIX_TIMERS) || !_POSIX_TIMERS
+#endif  // !defined(__MACH__)
 
 #define __WOULD_BE_NEGATIVE(seconds, subseconds) (seconds < 0 || (subseconds < 0 && seconds == 0))
 
@@ -58,10 +58,10 @@ rcl_system_time_point_now(rcl_system_time_point_t * now)
   mach_port_deallocate(mach_task_self(), cclock);
   timespec_now.tv_sec = mts.tv_sec;
   timespec_now.tv_nsec = mts.tv_nsec;
-#else
+#else  // defined(__MACH__)
   // Otherwise use clock_gettime.
   clock_gettime(CLOCK_REALTIME, &timespec_now);
-#endif  // if defined(__MACH__)
+#endif  // defined(__MACH__)
   if (__WOULD_BE_NEGATIVE(timespec_now.tv_sec, timespec_now.tv_nsec)) {
     RCL_SET_ERROR_MSG("unexpected negative time");
     return RCL_RET_ERROR;
@@ -85,14 +85,14 @@ rcl_steady_time_point_now(rcl_steady_time_point_t * now)
   mach_port_deallocate(mach_task_self(), cclock);
   timespec_now.tv_sec = mts.tv_sec;
   timespec_now.tv_nsec = mts.tv_nsec;
-#else
+#else  // defined(__MACH__)
   // Otherwise use clock_gettime.
-#ifdef CLOCK_MONOTONIC_RAW
+#if defined(CLOCK_MONOTONIC_RAW)
   clock_gettime(CLOCK_MONOTONIC_RAW, &timespec_now);
-#else
+#else  // defined(CLOCK_MONOTONIC_RAW)
   clock_gettime(CLOCK_MONOTONIC, &timespec_now);
-#endif  // CLOCK_MONOTONIC_RAW
-#endif  // if defined(__MACH__)
+#endif  // defined(CLOCK_MONOTONIC_RAW)
+#endif  // defined(__MACH__)
   if (__WOULD_BE_NEGATIVE(timespec_now.tv_sec, timespec_now.tv_nsec)) {
     RCL_SET_ERROR_MSG("unexpected negative time");
     return RCL_RET_ERROR;

rcl/src/rcl/time_win32.c

@@ -12,7 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifdef WIN32
 #ifndef WIN32
 #error time_win32.c is only intended to be used with win32 based systems
 #endif
@@ -68,5 +67,3 @@ rcl_steady_time_point_now(rcl_steady_time_point_t * now)
 #if __cplusplus
 }
 #endif
-
-#endif

rcl/test/memory_tools.cpp

@@ -138,4 +138,4 @@ void set_on_unepexcted_free_callback(UnexpectedCallbackType callback) {}
 
 void memory_checking_thread_init() {}
 
-#endif  // !defined(WIN32)
+#endif  // if defined(__linux__) elif defined(__APPLE__) elif defined(WIN32) else ...

rcl/test/memory_tools_common.cpp

@@ -20,9 +20,9 @@
 #if defined(__APPLE__)
 #include <malloc/malloc.h>
 #define MALLOC_PRINTF malloc_printf
-#else
+#else  // defined(__APPLE__)
 #define MALLOC_PRINTF printf
-#endif
+#endif  // defined(__APPLE__)
 
 #include "./memory_tools.hpp"
 #include "./scope_exit.hpp"

rcl/test/rcl/test_allocator.cpp

@@ -49,10 +49,10 @@ public:
 /* Tests the default allocator.
  */
 TEST_F(TestAllocatorFixture, test_default_allocator_normal) {
-#ifdef WIN32
+#if defined(WIN32)
   printf("Allocator tests disabled on Windows.\n");
   return;
-#endif
+#endif  // defined(WIN32)
   ASSERT_NO_MALLOC(
     rcl_allocator_t allocator = rcl_get_default_allocator();
   )