SERVER-18277 Fill in clock and tick sources in ServiceContext constructor

Now they only need to be set in cases where the defaults need to be changed.
Tests that just want the defaults can link against
$BUILD_DIR/mongo/db/service_context_noop_init to get a working global
ServiceContext.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/mongo/db/service_context.cpp b/src/mongo/db/service_context.cpp
index 5f3e2e34643..6f42a4a547b 100644
--- a/src/mongo/db/service_context.cpp
+++ b/src/mongo/db/service_context.cpp
@@ -36,6 +36,8 @@
 #include "mongo/stdx/memory.h"
 #include "mongo/util/assert_util.h"
 #include "mongo/util/mongoutils/str.h"
+#include "mongo/util/system_clock_source.h"
+#include "mongo/util/system_tick_source.h"
 
 namespace mongo {
 
@@ -112,6 +114,11 @@ Status validateStorageOptions(
     return Status::OK();
 }
 
+ServiceContext::ServiceContext()
+    : _tickSource(stdx::make_unique<SystemTickSource>()),
+      _fastClockSource(stdx::make_unique<SystemClockSource>()),
+      _preciseClockSource(stdx::make_unique<SystemClockSource>()) {}
+
 ServiceContext::~ServiceContext() {
     stdx::lock_guard<stdx::mutex> lk(_mutex);
     invariant(_clients.empty());