Add Map::pause/resume

Fixed bug after switching apps

2 files changed, 20 insertions, 0 deletions

diff --git a/include/mbgl/util/uv.hpp b/include/mbgl/util/uv.hpp
index 3c533cfbf8..0e828bb4f3 100644
--- a/include/mbgl/util/uv.hpp
+++ b/include/mbgl/util/uv.hpp
@@ -21,6 +21,8 @@ class thread;
 class rwlock;
 class loop;
 class worker;
+class mutex;
+class cond;
 
 }
 
diff --git a/include/mbgl/util/uv_detail.hpp b/include/mbgl/util/uv_detail.hpp
index 3bbfa4ac5a..112339c1b5 100644
--- a/include/mbgl/util/uv_detail.hpp
+++ b/include/mbgl/util/uv_detail.hpp
@@ -52,6 +52,7 @@ private:
 };
 
 class mutex {
+    friend class cond;
 public:
     inline mutex() {
         if (uv_mutex_init(&mtx) != 0) {
@@ -66,6 +67,23 @@ private:
     uv_mutex_t mtx;
 };
 
+class cond {
+public:
+    inline cond() {
+        if (uv_cond_init(&cnd) != 0) {
+            throw std::runtime_error("failed to initialize condition variable");
+        }
+    }
+    inline ~cond() { uv_cond_destroy(&cnd); }
+    inline void signal() { uv_cond_signal(&cnd); }
+    inline void broadcast() { uv_cond_broadcast(&cnd); }
+    inline void wait(mutex &mtx) { uv_cond_wait(&cnd, &mtx.mtx); }
+    inline void timedwait(mutex &mtx, uint64_t timeout) { uv_cond_timedwait(&cnd, &mtx.mtx, timeout); }
+
+private:
+    uv_cond_t cnd;
+};
+
 class lock {
 public:
     lock(mutex &mtx_) : mtx(mtx_) { mtx.lock(); }