From e87e18c8be3f11439f91d163a8fb30cea1e3e75f Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Wed, 11 Jan 2023 13:52:46 +0300
Subject: [PATCH] Use busy-waiting instead of short Sleep on Windows.

---
 tdutils/td/utils/port/sleep.cpp | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/tdutils/td/utils/port/sleep.cpp b/tdutils/td/utils/port/sleep.cpp
index 448f9bf8e..ee693537c 100644
--- a/tdutils/td/utils/port/sleep.cpp
+++ b/tdutils/td/utils/port/sleep.cpp
@@ -14,14 +14,23 @@
 #else
 #include <unistd.h>
 #endif
+#else
+#include "td/utils/port/Clocks.h"
 #endif
 
 namespace td {
 
 void usleep_for(int32 microseconds) {
 #if TD_PORT_WINDOWS
-  int32 milliseconds = microseconds / 1000 + (microseconds % 1000 ? 1 : 0);
-  Sleep(milliseconds);
+  if (microseconds < 2000) {
+    auto end_time = Clocks::monotonic() + microseconds * 1e-6;
+    do {
+      SwitchToThread();
+    } while (Clocks::monotonic() < end_time);
+  } else {
+    int32 milliseconds = microseconds / 1000 + (microseconds % 1000 ? 1 : 0);
+    Sleep(milliseconds);
+  }
 #else
 #if _POSIX_C_SOURCE >= 199309L
   timespec ts;