discord-rpc: Formatting

3rdparty/discord-rpc/discord_msg_queue.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <atomic>
+
+// A simple queue. No locks, but only works with a single thread as producer and a single thread as
+// a consumer. Mutex up as needed.
+
+namespace discord_rpc {
+
+template<typename ElementType, std::size_t QueueSize>
+class MsgQueue {
+  ElementType queue_[QueueSize];
+  std::atomic_uint nextAdd_ { 0 };
+  std::atomic_uint nextSend_ { 0 };
+  std::atomic_uint pendingSends_ { 0 };
+
+ public:
+  MsgQueue() {}
+
+  ElementType *GetNextAddMessage() {
+    // if we are falling behind, bail
+    if (pendingSends_.load() >= QueueSize) {
+      return nullptr;
+    }
+    auto index = (nextAdd_++) % QueueSize;
+    return &queue_[index];
+  }
+  void CommitAdd() { ++pendingSends_; }
+
+  bool HavePendingSends() const { return pendingSends_.load() != 0; }
+  ElementType *GetNextSendMessage() {
+    auto index = (nextSend_++) % QueueSize;
+    return &queue_[index];
+  }
+  void CommitSend() { --pendingSends_; }
+};
+
+}  // namespace discord_rpc