From 477138d39005f45fdbc58d3bd5e5c45b6ff654ea Mon Sep 17 00:00:00 2001
From: Park DongHa <luncliff@gmail.com>
Date: Sat, 4 Apr 2020 22:48:20 +0900
Subject: [PATCH] windows: disable set_or_cancel on UWP

---
 interface/coroutine/windows.h | 14 ++++++++++++--
 modules/system/CMakeLists.txt |  4 ++--
 modules/system/windows.cpp    |  2 ++
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/interface/coroutine/windows.h b/interface/coroutine/windows.h
index 07ff911e..56e5f26e 100644
--- a/interface/coroutine/windows.h
+++ b/interface/coroutine/windows.h
@@ -22,6 +22,8 @@
 
 namespace coro {
 
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_GAMES)
+
 /**
  * @brief Awaitable event type over Win32 thread pool
  * @ingroup Windows
@@ -50,15 +52,20 @@ class set_or_cancel final {
   private:
     /**
      * @brief Resume the coroutine in the thread pool to wait for the event object
+     * @note  It uses `INFINITE`, `WT_EXECUTEONLYONCE` for `RegisterWaitForSingleObject`
+     * 
      * @see https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-registerwaitforsingleobject
+     * 
      * @todo can we use `WT_EXECUTEINWAITTHREAD` for this type?
      */
     void suspend(coroutine_handle<void>) noexcept(false);
 
   public:
     /**
-     * @brief cancel the event waiting
-     * @return uint32_t 
+     * @brief   cancel the event waiting
+     * @note    `ERROR_IO_PENDING` will return `NO_ERROR` because it is using `INFINITE` timeout.
+     * @return  uint32_t `GetLastError` after `UnregisterWait`
+     * 
      * @see https://docs.microsoft.com/en-us/windows/desktop/api/winbase/nf-winbase-unregisterwait
      */
     uint32_t unregister() noexcept;
@@ -73,10 +80,12 @@ class set_or_cancel final {
         return unregister();
     }
 };
+#endif // WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_GAMES
 
 /**
  * @brief Move into the win32 thread pool and continue the routine
  * @ingroup Windows
+ * 
  * @see CreateThreadpoolWork
  * @see SubmitThreadpoolWork
  * @see CloseThreadpoolWork
@@ -117,6 +126,7 @@ class continue_on_thread_pool final {
 /**
  * @brief Move into the designated thread's APC queue and continue the routine
  * @ingroup Windows
+ * 
  * @see QueueUserAPC
  * @see OpenThread
  */
diff --git a/modules/system/CMakeLists.txt b/modules/system/CMakeLists.txt
index 89e43c52..1d1f8535 100644
--- a/modules/system/CMakeLists.txt
+++ b/modules/system/CMakeLists.txt
@@ -5,9 +5,9 @@ string(TOLOWER ${CMAKE_SYSTEM_NAME} SYSTEM_NAME)
 
 if(SYSTEM_NAME MATCHES WindowsStore)
     set(SYSTEM_NAME windows)
-elseif(ANDROID OR SYSTEM_NAME MATCHES [Aa]ndroid)
+elseif(ANDROID OR SYSTEM_NAME MATCHES android)
     set(SYSTEM_NAME linux)
-elseif(IOS OR SYSTEM_NAME MATCHES [Ii][Oo][Ss])
+elseif(IOS OR SYSTEM_NAME MATCHES ios)
     set(SYSTEM_NAME darwin)
 endif()
 
diff --git a/modules/system/windows.cpp b/modules/system/windows.cpp
index f7628c7a..d6067a4a 100644
--- a/modules/system/windows.cpp
+++ b/modules/system/windows.cpp
@@ -22,6 +22,7 @@ using namespace gsl;
 
 namespace coro {
 
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP | WINAPI_PARTITION_GAMES)
 static_assert(is_move_assignable_v<set_or_cancel> == false);
 static_assert(is_move_constructible_v<set_or_cancel> == false);
 static_assert(is_copy_assignable_v<set_or_cancel> == false);
@@ -61,6 +62,7 @@ void set_or_cancel::suspend(coroutine_handle<void> coro) noexcept(false) {
                            system_category(), "RegisterWaitForSingleObject"};
     }
 }
+#endif
 
 // auto get_threads_of(DWORD pid) noexcept(false) -> enumerable<DWORD> {
 //     // for current process