osd: Don't pump events when reading inputs.

This was a drain on performance.  If anything is trying to poll inputs
in a loop, it needs to call input_update() to ensure it gets up-to-date
state.

src/emu/video.cpp

@@ -218,7 +218,8 @@ void video_manager::frame_update(bool from_debugger)
 	bool const update_screens = (phase == machine_phase::RUNNING) && (!machine().paused() || machine().options().update_in_pause());
 	bool anything_changed = update_screens && finish_screen_updates();
 
-	// draw the user interface
+	// update inputs and draw the user interface
+	machine().osd().input_update();
 	emulator_info::draw_user_interface(machine());
 
 	// let plugins draw over the UI
@@ -246,9 +247,6 @@ void video_manager::frame_update(bool from_debugger)
 	if (!from_debugger && !skipped_it && phase > machine_phase::INIT && m_low_latency && effective_throttle())
 		update_throttle(current_time);
 
-	// get most recent input now
-	machine().osd().input_update();
-
 	emulator_info::periodic_check();
 
 	if (!from_debugger)

src/osd/mac/osdmac.h

@@ -58,7 +58,6 @@ public:
 	virtual void window_exit() override;
 
 	// sdl specific
-	void poll_inputs(running_machine &machine);
 	void release_keys();
 	bool should_hide_mouse();
 	void process_events_buf();

src/osd/mac/video.cpp

@@ -23,6 +23,8 @@
 #include "modules/lib/osdlib.h"
 #include "modules/monitor/monitor_module.h"
 
+extern void MacPollInputs(); // in windowcontroller.mm
+
 //============================================================
 //  CONSTANTS
 //============================================================
@@ -124,7 +126,8 @@ void mac_osd_interface::input_update()
 {
 	// poll the joystick values here
 	process_events_buf();
-	poll_inputs(machine());
+	MacPollInputs();
+	poll_input_modules();
 	check_osd_inputs(machine());
 }
 

src/osd/modules/debugger/debugwin.cpp

@@ -195,7 +195,7 @@ void debugger_windows::wait_for_debugger(device_t &device, bool firststop)
 	show_all();
 
 	// run input polling to ensure that our status is in sync
-	downcast<windows_osd_interface&>(machine().osd()).poll_input(*m_machine);
+	downcast<windows_osd_interface&>(machine().osd()).poll_input_modules();
 
 	// get and process messages
 	MSG message;

src/osd/modules/input/input_common.h

@@ -507,24 +507,15 @@ private:
 template <class TItem>
 int generic_button_get_state(void *device_internal, void *item_internal)
 {
-	device_info *devinfo = static_cast<device_info *>(device_internal);
-	TItem *itemdata = static_cast<TItem*>(item_internal);
-
 	// return the current state
-	devinfo->module().poll_if_necessary();
-	return *itemdata >> 7;
+	return *reinterpret_cast<TItem const *>(item_internal) >> 7;
 }
 
 
 template <class TItem>
 int generic_axis_get_state(void *device_internal, void *item_internal)
 {
-	device_info *devinfo = static_cast<device_info *>(device_internal);
-	TItem *axisdata = static_cast<TItem*>(item_internal);
-
-	// return the current state
-	devinfo->module().poll_if_necessary();
-	return *axisdata;
+	return *reinterpret_cast<TItem const *>(item_internal);
 }
 
 

src/osd/modules/input/input_dinput.cpp

@@ -1168,7 +1168,6 @@ int32_t dinput_joystick_device::pov_get_state(void *device_internal, void *item_
 	int const povdir = uintptr_t(item_internal) % 4;
 
 	// get the current state
-	devinfo->module().poll_if_necessary();
 	DWORD const pov = devinfo->m_joystick.state.rgdwPOV[povnum];
 
 	// if invalid, return 0

src/osd/modules/input/input_mac.cpp

@@ -31,17 +31,10 @@
 #include "../../mac/osdmac.h"
 #include "input_common.h"
 
-extern void MacPollInputs();
-
 void mac_osd_interface::customize_input_type_list(std::vector<input_type_entry> &typelist)
 {
 }
 
-void mac_osd_interface::poll_inputs()
-{
-	MacPollInputs();
-}
-
 void mac_osd_interface::release_keys()
 {
 }

src/osd/modules/input/input_sdl.cpp

@@ -1502,7 +1502,6 @@ public:
 							button_item++,
 							[] (void *device_internal, void *item_internal) -> int
 							{
-								static_cast<device_info *>(device_internal)->module().poll_if_necessary();
 								return (*reinterpret_cast<s32 const *>(item_internal) <= -16'384) ? 1 : 0;
 							},
 							&m_controller.axes[axis]);

src/osd/modules/input/input_windows.cpp

@@ -65,14 +65,6 @@ bool windows_osd_interface::handle_input_event(input_event eventid, void *eventd
 	return handled;
 }
 
-void windows_osd_interface::poll_input(running_machine &machine) const
-{
-	m_keyboard_input->poll_if_necessary();
-	m_mouse_input->poll_if_necessary();
-	m_lightgun_input->poll_if_necessary();
-	m_joystick_input->poll_if_necessary();
-}
-
 //============================================================
 //  customize_input_type_list
 //============================================================

src/osd/modules/lib/osdobj_common.cpp

@@ -675,6 +675,14 @@ bool osd_common_t::input_init()
 	return true;
 }
 
+void osd_common_t::poll_input_modules()
+{
+	m_keyboard_input->poll_if_necessary();
+	m_mouse_input->poll_if_necessary();
+	m_lightgun_input->poll_if_necessary();
+	m_joystick_input->poll_if_necessary();
+}
+
 void osd_common_t::exit_subsystems()
 {
 	video_exit();

src/osd/modules/lib/osdobj_common.h

@@ -279,6 +279,8 @@ protected:
 	virtual void build_slider_list() { }
 	virtual void update_slider_list() { }
 
+	void poll_input_modules();
+
 	static std::list<std::unique_ptr<osd_window> > s_window_list;
 
 private:

src/osd/sdl/osdsdl.cpp

@@ -297,7 +297,7 @@ void sdl_osd_interface::init(running_machine &machine)
 void sdl_osd_interface::input_update()
 {
 	process_events_buf();
-	poll_inputs();
+	poll_input_modules();
 	check_osd_inputs();
 }
 
@@ -421,15 +421,6 @@ void sdl_osd_interface::customize_input_type_list(std::vector<input_type_entry>
 }
 
 
-void sdl_osd_interface::poll_inputs()
-{
-	m_keyboard_input->poll_if_necessary();
-	m_mouse_input->poll_if_necessary();
-	m_lightgun_input->poll_if_necessary();
-	m_joystick_input->poll_if_necessary();
-}
-
-
 void sdl_osd_interface::release_keys()
 {
 	auto const keybd = dynamic_cast<input_module_base *>(m_keyboard_input);

src/osd/sdl/osdsdl.h

@@ -158,7 +158,6 @@ public:
 
 	// SDL-specific
 	virtual bool has_focus() const override { return bool(m_focus_window); }
-	void poll_inputs();
 	void release_keys();
 	bool should_hide_mouse();
 	void process_events_buf();

src/osd/windows/video.cpp

@@ -118,7 +118,7 @@ void windows_osd_interface::input_update()
 {
 	// poll the joystick values here
 	process_events(true, false);
-	poll_input(machine());
+	poll_input_modules();
 	check_osd_inputs();
 }
 

src/osd/windows/winmain.h

@@ -78,7 +78,6 @@ public:
 	// windows OSD specific
 	bool handle_input_event(input_event eventid, void *eventdata) const;
 	bool should_hide_mouse() const;
-	void poll_input(running_machine &machine) const;
 
 	virtual bool has_focus() const override;
 	virtual void process_events() override;
@@ -87,6 +86,8 @@ public:
 
 	int window_count();
 
+	using osd_common_t::poll_input_modules; // Win32 debugger calls this directly, which it shouldn't
+
 protected:
 	virtual void build_slider_list() override;
 	virtual void update_slider_list() override;