[wpinet] Move network portions of wpiutil into new wpinet library (#4077)

wpinet/src/main/native/cpp/uv/Timer.cpp

@@ -0,0 +1,44 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#include "wpinet/uv/Timer.h"
+
+#include "wpinet/uv/Loop.h"
+
+namespace wpi::uv {
+
+std::shared_ptr<Timer> Timer::Create(Loop& loop) {
+  auto h = std::make_shared<Timer>(private_init{});
+  int err = uv_timer_init(loop.GetRaw(), h->GetRaw());
+  if (err < 0) {
+    loop.ReportError(err);
+    return nullptr;
+  }
+  h->Keep();
+  return h;
+}
+
+void Timer::SingleShot(Loop& loop, Time timeout, std::function<void()> func) {
+  auto h = Create(loop);
+  if (!h) {
+    return;
+  }
+  h->timeout.connect([theTimer = h.get(), f = std::move(func)]() {
+    f();
+    theTimer->Close();
+  });
+  h->Start(timeout);
+}
+
+void Timer::Start(Time timeout, Time repeat) {
+  Invoke(
+      &uv_timer_start, GetRaw(),
+      [](uv_timer_t* handle) {
+        Timer& h = *static_cast<Timer*>(handle->data);
+        h.timeout();
+      },
+      timeout.count(), repeat.count());
+}
+
+}  // namespace wpi::uv