fixup chrono

Author: mstimberg

brian2cuda/templates/synapses_create_array.cu

@@ -37,7 +37,7 @@ size_t used_device_memory_start = used_device_memory;
 CUDA_CHECK_MEMORY();
 const double to_MB = 1.0 / (1024.0 * 1024.0);
 double tot_memory_MB = (used_device_memory - used_device_memory_start) * to_MB;
-double time_passed = std::chrono::duration_cast<std::chrono::nanoseconds>((std::chrono::high_resolution_clock::now() - start_timer);
+double time_passed = std::chrono::duration<double>(std::chrono::high_resolution_clock::now() - start_timer).count();
 std::cout << "INFO: {{owner.name}} creation took " <<  time_passed << "s";
 if (tot_memory_MB > 0)
     std::cout << " and used " << tot_memory_MB << "MB of device memory.";

brian2cuda/templates/synapses_create_generator.cu

@@ -154,7 +154,7 @@ size_t used_device_memory_start = used_device_memory;
 CUDA_CHECK_MEMORY();
 const double to_MB = 1.0 / (1024.0 * 1024.0);
 double tot_memory_MB = (used_device_memory - used_device_memory_start) * to_MB;
-double time_passed = std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::high_resolution_clock::now() - start_timer);
+double time_passed = std::chrono::duration<double>(std::chrono::high_resolution_clock::now() - start_timer).count();
 std::cout << "INFO: {{owner.name}} creation took " <<  time_passed << "s";
 if (tot_memory_MB > 0)
     std::cout << " and used " << tot_memory_MB << "MB of memory.";

brian2cuda/templates/synapses_push_spikes.cu

@@ -977,7 +977,7 @@ __global__ void _before_run_kernel_{{codeobj_name}}(
     }
 
     CUDA_CHECK_MEMORY();
-    double time_passed = std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::high_resolution_clock::now() - start_timer);
+    double time_passed = std::chrono::duration<double>(std::chrono::high_resolution_clock::now() - start_timer).count();
     std::cout << "INFO: {{owner.name}} initialisation took " <<  time_passed << "s";
     if (used_device_memory_after_dealloc < used_device_memory_start){
         size_t freed_bytes = used_device_memory_start - used_device_memory_after_dealloc;