[core] Add platform abstractions for utils::now()

Some platforms might require special permissions or custom APIs
to access the current time of the day.

2 files changed, 16 insertions, 1 deletions

diff --git a/include/mbgl/platform/time.hpp b/include/mbgl/platform/time.hpp
new file mode 100644
index 0000000000..8769524514
--- /dev/null
+++ b/include/mbgl/platform/time.hpp
@@ -0,0 +1,13 @@
+#pragma once
+
+#include <chrono>
+
+namespace mbgl {
+namespace platform {
+
+// Returns the current time. Abstracted because some platforms
+// will not allow direct access to the current time via syscall.
+std::chrono::time_point<std::chrono::system_clock, std::chrono::seconds> now();
+
+} // namespace platform
+} // namespace mbgl
diff --git a/include/mbgl/util/chrono.hpp b/include/mbgl/util/chrono.hpp
index 4de3c2d3a2..d736b4f826 100644
--- a/include/mbgl/util/chrono.hpp
+++ b/include/mbgl/util/chrono.hpp
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <mbgl/platform/time.hpp>
+
 #include <chrono>
 #include <string>
 
@@ -19,7 +21,7 @@ using Timestamp = std::chrono::time_point<std::chrono::system_clock, Seconds>;
 namespace util {
 
 inline Timestamp now() {
-    return std::chrono::time_point_cast<Seconds>(std::chrono::system_clock::now());
+    return platform::now();
 }
 
 // Returns the RFC1123 formatted date. E.g. "Tue, 04 Nov 2014 02:13:24 GMT"