Achievements: Release lock while waiting for HTTP requests

src/core/achievements.cpp

@@ -2013,7 +2013,7 @@ bool Achievements::Login(const char* username, const char* password, Error* erro
   }
 
   // Wait until the login request completes.
-  http->WaitForAllRequests();
+  http->WaitForAllRequestsWithYield([&lock]() { lock.unlock(); }, [&lock]() { lock.lock(); });
   Assert(!params.request);
 
   // Success? Assume the callback set the error message.
@@ -3413,8 +3413,7 @@ void Achievements::DrawLeaderboardEntry(const rc_client_leaderboard_entry_t& ent
 
   ImRect bb;
   bool visible, hovered;
-  bool pressed =
+  bool pressed = ImGuiFullscreen::MenuButtonFrame(entry.user, UIStyle.LargeFontSize, true, &bb, &visible, &hovered);
-    ImGuiFullscreen::MenuButtonFrame(entry.user, UIStyle.LargeFontSize, true, &bb, &visible, &hovered);
   if (!visible)
     return;
 

src/util/http_downloader.cpp

@@ -214,6 +214,22 @@ void HTTPDownloader::WaitForAllRequests()
   }
 }
 
+void HTTPDownloader::WaitForAllRequestsWithYield(std::function<void()> before_sleep_cb,
+                                                 std::function<void()> after_sleep_cb)
+{
+  std::unique_lock lock(m_pending_http_request_lock);
+  while (!m_pending_http_requests.empty())
+  {
+    // Don't burn too much CPU.
+    if (before_sleep_cb)
+      before_sleep_cb();
+    Timer::NanoSleep(1000000);
+    if (after_sleep_cb)
+      after_sleep_cb();
+    LockedPollRequests(lock);
+  }
+}
+
 void HTTPDownloader::LockedAddRequest(Request* request)
 {
   m_pending_http_requests.push_back(request);

src/util/http_downloader.h

@@ -78,6 +78,7 @@ public:
                          ProgressCallback* progress = nullptr);
   void PollRequests();
   void WaitForAllRequests();
+  void WaitForAllRequestsWithYield(std::function<void()> before_sleep_cb, std::function<void()> after_sleep_cb);
   bool HasAnyRequests();
 
   static const char DEFAULT_USER_AGENT[];