more civilized way of dealing with fixed time-steps.

Former-commit-id: 9b7880b04520458efd8729c5dfadf2a15caaaea9

examples/Makefile.am

@@ -25,10 +25,15 @@ AM_CFLAGS = -g -Wall -Werror -I../src $(OPENMP_CFLAGS) -DCPU_TPS=2.67e9
 AM_LDFLAGS =
 
 # Set-up the library
-bin_PROGRAMS = test
+bin_PROGRAMS = test test_fixed
 
 # Sources for test
 test_SOURCES = test.c
 test_CFLAGS = -DCOUNTER -DTIMER $(AM_CFLAGS)
 test_LDADD =  ../src/.libs/libswiftsim.a $(HDF5_LDFLAGS)
 
+# Sources for test_fixed
+test_fixed_SOURCES = test.c
+test_fixed_CFLAGS = -DCOUNTER -DTIMER $(AM_CFLAGS) -DENGINE_FLAGS=engine_policy_fixdt
+test_fixed_LDADD =  ../src/.libs/libswiftsim.a $(HDF5_LDFLAGS)
+

examples/test.c

@@ -46,6 +46,11 @@
     #define CPU_TPS 2.67e9
 #endif
 
+/* Engine policy flags. */
+#ifndef ENGINE_POLICY
+    #define ENGINE_POLICY engine_policy_none
+#endif
+
 /* Error macro. */
 #define error(s) { printf( "%s:%s:%i: %s\n" , __FILE__ , __FUNCTION__ , __LINE__ , s ); abort(); }
 
@@ -852,7 +857,7 @@ int main ( int argc , char *argv[] ) {
     
     /* Initialize the runner with this space. */
     tic = getticks();
-    engine_init( &e , &s , dt_max , nr_threads , nr_queues , engine_policy_steal | engine_policy_keep );
+    engine_init( &e , &s , dt_max , nr_threads , nr_queues , ENGINE_POLICY | engine_policy_steal );
     printf( "main: engine_init took %.3f ms.\n" , ((double)(getticks() - tic)) / CPU_TPS * 1000 ); fflush(stdout);
 
     /* Write the state of the system as it is before starting time integration. */