input: don't poll input on emu thread

fixes device reset errors with dx9 on Alt+Enter and other renderer
crashes

core/hw/maple/maple_if.cpp

@@ -19,7 +19,6 @@ maple_device* MapleDevices[MAPLE_PORTS][6];
 
 int maple_schid;
 
-void UpdateInputState();
 /*
 	Maple host controller
 	Direct processing, async interrupt handling
@@ -147,8 +146,6 @@ static void maple_DoDma()
 	}
 #endif
 
-	UpdateInputState();
-
 	const bool swap_msb = (SB_MMSEL == 0);
 	u32 xfer_count=0;
 	bool last = false;

core/rend/gui.cpp

@@ -41,7 +41,6 @@
 #include "emulator.h"
 #include "rend/mainui.h"
 
-extern void UpdateInputState();
 static bool game_started;
 
 extern u8 kb_shift[MAPLE_PORTS]; // shift keys pressed (bitmask)
@@ -310,8 +309,6 @@ static void ImGui_Impl_NewFrame()
 
 	ImGuiIO& io = ImGui::GetIO();
 
-	UpdateInputState();
-
 	// Read keyboard modifiers inputs
 	io.KeyCtrl = 0;
 	io.KeyShift = 0;

core/rend/mainui.cpp

@@ -35,6 +35,7 @@ void UpdateInputState();
 bool mainui_rend_frame()
 {
 	os_DoEvents();
+	UpdateInputState();
 
 	if (gui_is_open() || gui_state == GuiState::VJoyEdit)
 	{
@@ -48,7 +49,6 @@ bool mainui_rend_frame()
 	{
 		if (!rend_single_frame(mainui_enabled))
 		{
-			UpdateInputState();
 			if (!dc_is_running())
 			{
 				std::string error = dc_get_last_error();

shell/libretro/libretro.cpp

@@ -173,6 +173,8 @@ static std::vector<std::string> disk_paths;
 static std::vector<std::string> disk_labels;
 static bool disc_tray_open = false;
 
+void UpdateInputState();
+
 void retro_set_video_refresh(retro_video_refresh_t cb)
 {
 	video_cb = cb;
@@ -827,6 +829,9 @@ void retro_run()
 	if (config::RendererType.isOpenGL())
 		glsm_ctl(GLSM_CTL_STATE_BIND, nullptr);
 
+	poll_cb();
+	UpdateInputState();
+
 	if (config::ThreadedRendering)
 	{
 		bool fastforward = false;
@@ -840,8 +845,6 @@ void retro_run()
 			first_run = false;
 		}
 
-		poll_cb();
-
 		// Render
 		is_dupe = true;
 		for (int i = 0; i < 5 && is_dupe; i++)