Join worker tasks before destroying TileData

Fixes #1309

1 files changed, 34 insertions, 0 deletions

diff --git a/src/mbgl/util/work_request.cpp b/src/mbgl/util/work_request.cpp
new file mode 100644
index 0000000000..05fe535802
--- /dev/null
+++ b/src/mbgl/util/work_request.cpp
@@ -0,0 +1,34 @@
+#include <mbgl/util/work_request.hpp>
+
+namespace mbgl {
+
+WorkRequest::WorkRequest() = default;
+
+WorkRequest::WorkRequest(Future&& future)
+    : complete(std::move(future)) {
+}
+
+WorkRequest::WorkRequest(WorkRequest&& o)
+    : complete(std::move(o.complete)) {
+}
+
+WorkRequest::~WorkRequest() {
+    if (complete.valid()) {
+        complete.get();
+    }
+}
+
+WorkRequest& WorkRequest::operator=(WorkRequest&& o) {
+    complete = std::move(o.complete);
+    return *this;
+}
+
+WorkRequest::operator bool() const {
+    return complete.valid();
+}
+
+void WorkRequest::join() {
+    complete.get();
+}
+
+}