move worker to MapContext

include/mbgl/map/map.hpp

@@ -175,7 +175,6 @@ private:
     void resize(uint16_t width, uint16_t height, float ratio, uint16_t fbWidth, uint16_t fbHeight);
 
     util::ptr<Sprite> getSprite();
-    Worker& getWorker();
 
     // Checks if render thread needs to pause
     void checkForPause();
@@ -215,7 +214,6 @@ private:
     std::unique_ptr<MapContext> context;
 
 private:
-    std::unique_ptr<Worker> workers;
     std::thread thread;
     std::unique_ptr<uv::async> asyncTerminate;
     std::unique_ptr<uv::async> asyncUpdate;

src/mbgl/map/map.cpp

@@ -86,7 +86,6 @@ Map::~Map() {
 
     // Explicitly reset all pointers.
     style.reset();
-    workers.reset();
     context.reset();
 
     uv_run(env->loop, UV_RUN_DEFAULT);
@@ -94,11 +93,6 @@ Map::~Map() {
     env->performCleanup();
 }
 
-Worker& Map::getWorker() {
-    assert(workers);
-    return *workers;
-}
-
 void Map::start(bool startPaused, Mode renderMode) {
     assert(Environment::currentlyOn(ThreadType::Main));
     assert(mode == Mode::None);
@@ -119,7 +113,7 @@ void Map::start(bool startPaused, Mode renderMode) {
 
         // It's now safe to destroy/join the workers since there won't be any more callbacks that
         // could dispatch to the worker pool.
-        workers.reset();
+        context->workers.reset();
 
         terminating = true;
 
@@ -263,7 +257,7 @@ void Map::run() {
     view.activate();
     view.discard();
 
-    workers = util::make_unique<Worker>(env->loop, 4);
+    context->workers = util::make_unique<Worker>(env->loop, 4);
 
     setup();
     prepare();
@@ -744,7 +738,7 @@ void Map::updateTiles() {
     assert(Environment::currentlyOn(ThreadType::Map));
     if (!style) return;
     for (const auto& source : style->sources) {
-        source->update(*data, getWorker(), style, *context->glyphAtlas, *context->glyphStore,
+        source->update(*data, context->getWorker(), style, *context->glyphAtlas, *context->glyphStore,
                        *context->spriteAtlas, getSprite(), *context->texturePool, [this]() {
             assert(Environment::currentlyOn(ThreadType::Map));
             triggerUpdate();

src/mbgl/map/map_context.cpp

@@ -11,6 +11,7 @@
 
 #include <mbgl/util/std.hpp>
 #include <mbgl/util/uv_detail.hpp>
+#include <mbgl/util/worker.hpp>
 #include <mbgl/util/texture_pool.hpp>
 
 namespace mbgl {
@@ -24,4 +25,9 @@ MapContext::MapContext(Environment& env)
       painter(util::make_unique<Painter>(*spriteAtlas, *glyphAtlas, *lineAtlas)) {
 }
 
+Worker& MapContext::getWorker() {
+    assert(workers);
+    return *workers;
+}
+
 }

src/mbgl/map/map_context.hpp

@@ -17,12 +17,16 @@ class Painter;
 class Sprite;
 class StyleSource;
 class StyleLayerGroup;
+class Worker;
 
 class MapContext {
 public:
     MapContext(Environment&);
 
+    Worker& getWorker();
+
 public:
+    std::unique_ptr<Worker> workers;
     const std::unique_ptr<GlyphStore> glyphStore;
     const std::unique_ptr<GlyphAtlas> glyphAtlas;
     const std::unique_ptr<SpriteAtlas> spriteAtlas;