diff --git a/src/gfx.cpp b/src/gfx.cpp
--- a/src/gfx.cpp
+++ b/src/gfx.cpp
@@ -21,6 +21,7 @@
 #include "network/network_func.h"
 #include "window_func.h"
 #include "newgrf_debug.h"
+#include "thread.h"
 
 #include "table/palettes.h"
 #include "table/string_colours.h"
diff --git a/src/gfx_func.h b/src/gfx_func.h
--- a/src/gfx_func.h
+++ b/src/gfx_func.h
@@ -75,7 +75,6 @@ void HandleKeypress(uint keycode, WChar 
 void HandleTextInput(const char *str, bool marked = false, const char *caret = NULL, const char *insert_location = NULL, const char *replacement_end = NULL);
 void HandleCtrlChanged();
 void HandleMouseEvents();
-void CSleep(int milliseconds);
 void UpdateWindows();
 
 void DrawMouseCursor();
diff --git a/src/music/extmidi.cpp b/src/music/extmidi.cpp
--- a/src/music/extmidi.cpp
+++ b/src/music/extmidi.cpp
@@ -18,6 +18,7 @@
 #include "../gfx_func.h"
 #include "extmidi.h"
 #include "../base_media_base.h"
+#include "../thread.h"
 #include "midifile.hpp"
 #include <fcntl.h>
 #include <sys/types.h>
diff --git a/src/network/network_client.cpp b/src/network/network_client.cpp
--- a/src/network/network_client.cpp
+++ b/src/network/network_client.cpp
@@ -29,6 +29,7 @@
 #include "network_base.h"
 #include "network_client.h"
 #include "../core/backup_type.hpp"
+#include "../thread.h"
 
 #include "table/strings.h"
 
diff --git a/src/os/os2/os2.cpp b/src/os/os2/os2.cpp
--- a/src/os/os2/os2.cpp
+++ b/src/os/os2/os2.cpp
@@ -205,15 +205,6 @@ bool GetClipboardContents(char *buffer, 
 }
 
 
-void CSleep(int milliseconds)
-{
-#ifndef __INNOTEK_LIBC__
-	delay(milliseconds);
-#else
-	usleep(milliseconds * 1000);
-#endif
-}
-
 const char *FS2OTTD(const char *name) {return name;}
 const char *OTTD2FS(const char *name) {return name;}
 
diff --git a/src/os/unix/unix.cpp b/src/os/unix/unix.cpp
--- a/src/os/unix/unix.cpp
+++ b/src/os/unix/unix.cpp
@@ -273,14 +273,6 @@ bool GetClipboardContents(char *buffer, 
 #endif
 
 
-/* multi os compatible sleep function */
-
-void CSleep(int milliseconds)
-{
-	usleep(milliseconds * 1000);
-}
-
-
 #ifndef __APPLE__
 uint GetCPUCoreCount()
 {
diff --git a/src/os/windows/win32.cpp b/src/os/windows/win32.cpp
--- a/src/os/windows/win32.cpp
+++ b/src/os/windows/win32.cpp
@@ -544,12 +544,6 @@ bool GetClipboardContents(char *buffer, 
 }
 
 
-void CSleep(int milliseconds)
-{
-	Sleep(milliseconds);
-}
-
-
 /**
  * Convert to OpenTTD's encoding from that of the local environment.
  * When the project is built in UNICODE, the system codepage is irrelevant and
diff --git a/src/thread.h b/src/thread.h
--- a/src/thread.h
+++ b/src/thread.h
@@ -21,6 +21,15 @@ class OTTDThreadExitSignal { };
 
 
 /**
+ * Sleep on the current thread for a defined time.
+ * @param milliseconds Time to sleep for in milliseconds.
+ */
+inline void CSleep(int milliseconds)
+{
+	std::this_thread::sleep_for(std::chrono::milliseconds(milliseconds));
+}
+
+/**
  * Get number of processor cores in the system, including HyperThreading or similar.
  * @return Total number of processor cores.
  */
diff --git a/src/video/allegro_v.cpp b/src/video/allegro_v.cpp
--- a/src/video/allegro_v.cpp
+++ b/src/video/allegro_v.cpp
@@ -25,6 +25,7 @@
 #include "../core/random_func.hpp"
 #include "../core/math_func.hpp"
 #include "../framerate_type.h"
+#include "../thread.h"
 #include "allegro_v.h"
 #include <allegro.h>
 
diff --git a/src/video/cocoa/event.mm b/src/video/cocoa/event.mm
--- a/src/video/cocoa/event.mm
+++ b/src/video/cocoa/event.mm
@@ -37,6 +37,7 @@
 #include "../../core/math_func.hpp"
 #include "../../texteff.hpp"
 #include "../../window_func.h"
+#include "../../thread.h"
 
 #import <sys/time.h> /* gettimeofday */
 
diff --git a/src/video/cocoa/fullscreen.mm b/src/video/cocoa/fullscreen.mm
--- a/src/video/cocoa/fullscreen.mm
+++ b/src/video/cocoa/fullscreen.mm
@@ -30,6 +30,7 @@
 #include "../../core/sort_func.hpp"
 #include "cocoa_v.h"
 #include "../../gfx_func.h"
+#include "../../thread.h"
 #include "../../os/macosx/macos.h"
 
 /**
@@ -174,7 +175,7 @@ class FullscreenSubdriver : public Cocoa
 
 		double adjustment = (target - position) / linesPerSecond;
 
-		CSleep((uint32)(adjustment * 1000));
+		CSleep((uint32)adjustment * 1000);
 	}
 
 
diff --git a/src/video/dedicated_v.cpp b/src/video/dedicated_v.cpp
--- a/src/video/dedicated_v.cpp
+++ b/src/video/dedicated_v.cpp
@@ -22,6 +22,7 @@
 #include "../company_func.h"
 #include "../core/random_func.hpp"
 #include "../saveload/saveload.h"
+#include "../thread.h"
 #include "dedicated_v.h"
 
 #ifdef __OS2__