src/joystick/windows/SDL_windowsjoystick.c
author Sam Lantinga
Fri, 07 Oct 2016 16:32:58 -0700
changeset 10479 aa816d06ed78
parent 10226 cb13d22b7f09
child 10617 346c02ff71b6
permissions -rw-r--r--
Fixed bug 2833 - Access Violation on SDL_PollEvent after init, delay and quit of joystick subsystem

Jan Klass

Not sure if this is limited to the joystick subsystem,
but I created a minimal program for reproducibility,
which is attached.

The issue occurs with my gamepad Razer Onza (an xbox-style gamepad) plugged in.
On initialization, the gamepad is being recognized.
After quitting the subsystem, the poll will receive the joystick added event,
which it instantly handles itself, calling SDL_SYS_JoystickDetect again,
which this time calls IDirectInput8_EnumDevices with dinput = NULL (after it was released on quit).
This seems to lead to an access violation within said function, which I have no source for.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_JOYSTICK_DINPUT || SDL_JOYSTICK_XINPUT
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/* DirectInput joystick driver; written by Glenn Maynard, based on Andrei de
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 * A. Formiga's WINMM driver.
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 *
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 * Hats and sliders are completely untested; the app I'm writing this for mostly
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 * doesn't use them and I don't own any joysticks with them.
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 *
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 * We don't bother to use event notification here.  It doesn't seem to work
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 * with polled devices, and it's fine to call IDirectInputDevice8_GetDeviceData and
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 * let it return 0 events. */
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#include "SDL_error.h"
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#include "SDL_assert.h"
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#include "SDL_events.h"
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#include "SDL_timer.h"
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#include "SDL_mutex.h"
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#include "SDL_events.h"
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#include "SDL_hints.h"
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#include "SDL_joystick.h"
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#include "../SDL_sysjoystick.h"
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#include "../../thread/SDL_systhread.h"
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#include "../../core/windows/SDL_windows.h"
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#if !defined(__WINRT__)
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#include <dbt.h>
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#endif
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#define INITGUID /* Only set here, if set twice will cause mingw32 to break. */
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#include "SDL_windowsjoystick_c.h"
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#include "SDL_dinputjoystick_c.h"
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#include "SDL_xinputjoystick_c.h"
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#include "../../haptic/windows/SDL_dinputhaptic_c.h"    /* For haptic hot plugging */
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#include "../../haptic/windows/SDL_xinputhaptic_c.h"    /* For haptic hot plugging */
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#ifndef DEVICE_NOTIFY_WINDOW_HANDLE
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#define DEVICE_NOTIFY_WINDOW_HANDLE 0x00000000
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#endif
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/* local variables */
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static SDL_bool s_bDeviceAdded = SDL_FALSE;
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static SDL_bool s_bDeviceRemoved = SDL_FALSE;
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static SDL_JoystickID s_nInstanceID = -1;
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static SDL_cond *s_condJoystickThread = NULL;
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static SDL_mutex *s_mutexJoyStickEnum = NULL;
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static SDL_Thread *s_threadJoystick = NULL;
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static SDL_bool s_bJoystickThreadQuit = SDL_FALSE;
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JoyStick_DeviceData *SYS_Joystick;    /* array to hold joystick ID values */
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static SDL_bool s_bWindowsDeviceChanged = SDL_FALSE;
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#ifdef __WINRT__
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typedef struct
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{
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    int unused;
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} SDL_DeviceNotificationData;
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static void
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SDL_CleanupDeviceNotification(SDL_DeviceNotificationData *data)
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{
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}
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static int
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SDL_CreateDeviceNotification(SDL_DeviceNotificationData *data)
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{
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    return 0;
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}
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static void
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SDL_CheckDeviceNotification(SDL_DeviceNotificationData *data)
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{
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}
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#else /* !__WINRT__ */
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typedef struct
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{
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    HRESULT coinitialized;
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    WNDCLASSEX wincl;
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    HWND messageWindow;
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    HDEVNOTIFY hNotify;
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} SDL_DeviceNotificationData;
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/* windowproc for our joystick detect thread message only window, to detect any USB device addition/removal */
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static LRESULT CALLBACK
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SDL_PrivateJoystickDetectProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
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{
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    switch (message) {
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    case WM_DEVICECHANGE:
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        switch (wParam) {
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        case DBT_DEVICEARRIVAL:
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            if (((DEV_BROADCAST_HDR*)lParam)->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE) {
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                s_bWindowsDeviceChanged = SDL_TRUE;
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            }
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            break;
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        case DBT_DEVICEREMOVECOMPLETE:
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            if (((DEV_BROADCAST_HDR*)lParam)->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE) {
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                s_bWindowsDeviceChanged = SDL_TRUE;
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            }
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            break;
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        }
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        return 0;
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    }
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    return DefWindowProc (hwnd, message, wParam, lParam);
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}
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static void
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SDL_CleanupDeviceNotification(SDL_DeviceNotificationData *data)
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{
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    if (data->hNotify)
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        UnregisterDeviceNotification(data->hNotify);
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    if (data->messageWindow)
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        DestroyWindow(data->messageWindow);
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    UnregisterClass(data->wincl.lpszClassName, data->wincl.hInstance);
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    if (data->coinitialized == S_OK) {
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        WIN_CoUninitialize();
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    }
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}
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static int
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SDL_CreateDeviceNotification(SDL_DeviceNotificationData *data)
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{
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    DEV_BROADCAST_DEVICEINTERFACE dbh;
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    GUID GUID_DEVINTERFACE_HID = { 0x4D1E55B2L, 0xF16F, 0x11CF, { 0x88, 0xCB, 0x00, 0x11, 0x11, 0x00, 0x00, 0x30 } };
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    SDL_zerop(data);
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    data->coinitialized = WIN_CoInitialize();
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    data->wincl.hInstance = GetModuleHandle(NULL);
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    data->wincl.lpszClassName = L"Message";
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    data->wincl.lpfnWndProc = SDL_PrivateJoystickDetectProc;      /* This function is called by windows */
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    data->wincl.cbSize = sizeof (WNDCLASSEX);
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    if (!RegisterClassEx(&data->wincl)) {
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        WIN_SetError("Failed to create register class for joystick autodetect");
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        SDL_CleanupDeviceNotification(data);
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        return -1;
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    }
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    data->messageWindow = (HWND)CreateWindowEx(0,  L"Message", NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL);
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    if (!data->messageWindow) {
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        WIN_SetError("Failed to create message window for joystick autodetect");
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        SDL_CleanupDeviceNotification(data);
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        return -1;
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    }
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    SDL_zero(dbh);
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    dbh.dbcc_size = sizeof(dbh);
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    dbh.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
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    dbh.dbcc_classguid = GUID_DEVINTERFACE_HID;
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    data->hNotify = RegisterDeviceNotification(data->messageWindow, &dbh, DEVICE_NOTIFY_WINDOW_HANDLE);
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    if (!data->hNotify) {
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        WIN_SetError("Failed to create notify device for joystick autodetect");
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        SDL_CleanupDeviceNotification(data);
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        return -1;
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    }
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    return 0;
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}
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static void
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SDL_CheckDeviceNotification(SDL_DeviceNotificationData *data)
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{
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    MSG msg;
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    if (!data->messageWindow) {
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        return;
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    }
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    while (PeekMessage(&msg, data->messageWindow, 0, 0, PM_NOREMOVE)) {
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        if (GetMessage(&msg, data->messageWindow, 0, 0) != 0)  {
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            TranslateMessage(&msg);
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            DispatchMessage(&msg);
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        }
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    }
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}
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#endif /* __WINRT__ */
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/* Function/thread to scan the system for joysticks. */
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static int
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SDL_JoystickThread(void *_data)
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{
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    SDL_DeviceNotificationData notification_data;
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#if SDL_JOYSTICK_XINPUT
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    SDL_bool bOpenedXInputDevices[XUSER_MAX_COUNT];
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    SDL_zero(bOpenedXInputDevices);
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#endif
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    if (SDL_CreateDeviceNotification(&notification_data) < 0) {
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        return -1;
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    }
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    SDL_LockMutex(s_mutexJoyStickEnum);
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    while (s_bJoystickThreadQuit == SDL_FALSE) {
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        SDL_bool bXInputChanged = SDL_FALSE;
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        SDL_CondWaitTimeout(s_condJoystickThread, s_mutexJoyStickEnum, 300);
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        SDL_CheckDeviceNotification(&notification_data);
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#if SDL_JOYSTICK_XINPUT
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        if (SDL_XINPUT_Enabled() && XINPUTGETCAPABILITIES) {
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            /* scan for any change in XInput devices */
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            Uint8 userId;
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            for (userId = 0; userId < XUSER_MAX_COUNT; userId++) {
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                XINPUT_CAPABILITIES capabilities;
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                const DWORD result = XINPUTGETCAPABILITIES(userId, XINPUT_FLAG_GAMEPAD, &capabilities);
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                const SDL_bool available = (result == ERROR_SUCCESS);
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                if (bOpenedXInputDevices[userId] != available) {
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                    bXInputChanged = SDL_TRUE;
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                    bOpenedXInputDevices[userId] = available;
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                }
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            }
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        }
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#endif /* SDL_JOYSTICK_XINPUT */
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        if (s_bWindowsDeviceChanged || bXInputChanged) {
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            SDL_UnlockMutex(s_mutexJoyStickEnum);  /* let main thread go while we SDL_Delay(). */
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            SDL_Delay(300); /* wait for direct input to find out about this device */
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            SDL_LockMutex(s_mutexJoyStickEnum);
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            s_bDeviceRemoved = SDL_TRUE;
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            s_bDeviceAdded = SDL_TRUE;
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            s_bWindowsDeviceChanged = SDL_FALSE;
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        }
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    }
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    SDL_UnlockMutex(s_mutexJoyStickEnum);
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    SDL_CleanupDeviceNotification(&notification_data);
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    return 1;
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}
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void SDL_SYS_AddJoystickDevice(JoyStick_DeviceData *device)
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{
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    device->send_add_event = SDL_TRUE;
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    device->nInstanceID = ++s_nInstanceID;
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    device->pNext = SYS_Joystick;
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    SYS_Joystick = device;
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    s_bDeviceAdded = SDL_TRUE;
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}
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/* Function to scan the system for joysticks.
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 * Joystick 0 should be the system default joystick.
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 * It should return 0, or -1 on an unrecoverable fatal error.
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 */
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int
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SDL_SYS_JoystickInit(void)
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{
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    if (SDL_DINPUT_JoystickInit() < 0) {
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        SDL_SYS_JoystickQuit();
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        return -1;
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    }
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    if (SDL_XINPUT_JoystickInit() < 0) {
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        SDL_SYS_JoystickQuit();
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        return -1;
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    }
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    s_mutexJoyStickEnum = SDL_CreateMutex();
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    s_condJoystickThread = SDL_CreateCond();
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    s_bDeviceAdded = SDL_TRUE; /* force a scan of the system for joysticks this first time */
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    SDL_SYS_JoystickDetect();
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    if (!s_threadJoystick) {
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        /* spin up the thread to detect hotplug of devices */
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        s_bJoystickThreadQuit = SDL_FALSE;
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        s_threadJoystick = SDL_CreateThreadInternal(SDL_JoystickThread, "SDL_joystick", 64 * 1024, NULL);
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    }
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    return SDL_SYS_NumJoysticks();
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}
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/* return the number of joysticks that are connected right now */
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int
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SDL_SYS_NumJoysticks()
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{
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    int nJoysticks = 0;
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    JoyStick_DeviceData *device = SYS_Joystick;
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    while (device) {
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        nJoysticks++;
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        device = device->pNext;
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    }
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    return nJoysticks;
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}
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/* detect any new joysticks being inserted into the system */
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void
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SDL_SYS_JoystickDetect()
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{
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    JoyStick_DeviceData *pCurList = NULL;
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    /* only enum the devices if the joystick thread told us something changed */
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    if (!s_bDeviceAdded && !s_bDeviceRemoved) {
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        return;  /* thread hasn't signaled, nothing to do right now. */
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    }
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    SDL_LockMutex(s_mutexJoyStickEnum);
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    s_bDeviceAdded = SDL_FALSE;
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    s_bDeviceRemoved = SDL_FALSE;
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    pCurList = SYS_Joystick;
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    SYS_Joystick = NULL;
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    /* Look for DirectInput joysticks, wheels, head trackers, gamepads, etc.. */
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    SDL_DINPUT_JoystickDetect(&pCurList);
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    /* Look for XInput devices. Do this last, so they're first in the final list. */
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    SDL_XINPUT_JoystickDetect(&pCurList);
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    SDL_UnlockMutex(s_mutexJoyStickEnum);
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    while (pCurList) {
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        JoyStick_DeviceData *pListNext = NULL;
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        if (pCurList->bXInputDevice) {
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            SDL_XINPUT_MaybeRemoveDevice(pCurList->XInputUserId);
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        } else {
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            SDL_DINPUT_MaybeRemoveDevice(&pCurList->dxdevice);
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   356
        }
slouken@8972
   357
slouken@10226
   358
        SDL_PrivateJoystickRemoved(pCurList->nInstanceID);
slouken@8972
   359
slouken@8972
   360
        pListNext = pCurList->pNext;
slouken@8972
   361
        SDL_free(pCurList->joystickname);
slouken@8972
   362
        SDL_free(pCurList);
slouken@8972
   363
        pCurList = pListNext;
slouken@8972
   364
    }
slouken@8972
   365
slouken@8972
   366
    if (s_bDeviceAdded) {
slouken@8972
   367
        JoyStick_DeviceData *pNewJoystick;
slouken@8972
   368
        int device_index = 0;
slouken@8972
   369
        s_bDeviceAdded = SDL_FALSE;
slouken@8972
   370
        pNewJoystick = SYS_Joystick;
slouken@8972
   371
        while (pNewJoystick) {
slouken@8972
   372
            if (pNewJoystick->send_add_event) {
slouken@8972
   373
                if (pNewJoystick->bXInputDevice) {
slouken@8972
   374
                    SDL_XINPUT_MaybeAddDevice(pNewJoystick->XInputUserId);
slouken@8972
   375
                } else {
slouken@8972
   376
                    SDL_DINPUT_MaybeAddDevice(&pNewJoystick->dxdevice);
slouken@8972
   377
                }
slouken@8972
   378
slouken@10226
   379
                SDL_PrivateJoystickAdded(device_index);
slouken@8972
   380
slouken@8972
   381
                pNewJoystick->send_add_event = SDL_FALSE;
slouken@8972
   382
            }
slouken@8972
   383
            device_index++;
slouken@8972
   384
            pNewJoystick = pNewJoystick->pNext;
slouken@8972
   385
        }
slouken@8972
   386
    }
slouken@8972
   387
}
slouken@8972
   388
slouken@8972
   389
/* Function to get the device-dependent name of a joystick */
slouken@8972
   390
const char *
slouken@8972
   391
SDL_SYS_JoystickNameForDeviceIndex(int device_index)
slouken@8972
   392
{
slouken@8972
   393
    JoyStick_DeviceData *device = SYS_Joystick;
slouken@8972
   394
slouken@8972
   395
    for (; device_index > 0; device_index--)
slouken@8972
   396
        device = device->pNext;
slouken@8972
   397
slouken@8972
   398
    return device->joystickname;
slouken@8972
   399
}
slouken@8972
   400
slouken@8972
   401
/* Function to perform the mapping between current device instance and this joysticks instance id */
slouken@8972
   402
SDL_JoystickID
slouken@8972
   403
SDL_SYS_GetInstanceIdOfDeviceIndex(int device_index)
slouken@8972
   404
{
slouken@8972
   405
    JoyStick_DeviceData *device = SYS_Joystick;
slouken@8972
   406
    int index;
slouken@8972
   407
slouken@8972
   408
    for (index = device_index; index > 0; index--)
slouken@8972
   409
        device = device->pNext;
slouken@8972
   410
slouken@8972
   411
    return device->nInstanceID;
slouken@8972
   412
}
slouken@8972
   413
slouken@8972
   414
/* Function to open a joystick for use.
philipp@9380
   415
   The joystick to open is specified by the device index.
slouken@8972
   416
   This should fill the nbuttons and naxes fields of the joystick structure.
slouken@8972
   417
   It returns 0, or -1 if there is an error.
slouken@8972
   418
 */
slouken@8972
   419
int
slouken@8972
   420
SDL_SYS_JoystickOpen(SDL_Joystick * joystick, int device_index)
slouken@8972
   421
{
slouken@8972
   422
    JoyStick_DeviceData *joystickdevice = SYS_Joystick;
slouken@8972
   423
slouken@8972
   424
    for (; device_index > 0; device_index--)
slouken@8972
   425
        joystickdevice = joystickdevice->pNext;
slouken@8972
   426
slouken@8972
   427
    /* allocate memory for system specific hardware data */
slouken@8972
   428
    joystick->instance_id = joystickdevice->nInstanceID;
slouken@8972
   429
    joystick->hwdata =
slouken@8972
   430
        (struct joystick_hwdata *) SDL_malloc(sizeof(struct joystick_hwdata));
slouken@8972
   431
    if (joystick->hwdata == NULL) {
slouken@8972
   432
        return SDL_OutOfMemory();
slouken@8972
   433
    }
slouken@8972
   434
    SDL_zerop(joystick->hwdata);
slouken@8972
   435
    joystick->hwdata->guid = joystickdevice->guid;
slouken@8972
   436
slouken@8972
   437
    if (joystickdevice->bXInputDevice) {
slouken@8972
   438
        return SDL_XINPUT_JoystickOpen(joystick, joystickdevice);
slouken@8972
   439
    } else {
slouken@8972
   440
        return SDL_DINPUT_JoystickOpen(joystick, joystickdevice);
slouken@8972
   441
    }
slouken@8972
   442
}
slouken@8972
   443
slouken@8972
   444
/* return true if this joystick is plugged in right now */
slouken@8972
   445
SDL_bool 
slouken@8972
   446
SDL_SYS_JoystickAttached(SDL_Joystick * joystick)
slouken@8972
   447
{
icculus@9433
   448
    return joystick->hwdata && !joystick->hwdata->removed;
slouken@8972
   449
}
slouken@8972
   450
slouken@8972
   451
void
slouken@8972
   452
SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
slouken@8972
   453
{
icculus@9433
   454
    if (!joystick->hwdata || joystick->hwdata->removed) {
slouken@8972
   455
        return;
slouken@8972
   456
    }
slouken@8972
   457
slouken@8972
   458
    if (joystick->hwdata->bXInputDevice) {
slouken@8972
   459
        SDL_XINPUT_JoystickUpdate(joystick);
slouken@8972
   460
    } else {
slouken@8972
   461
        SDL_DINPUT_JoystickUpdate(joystick);
slouken@8972
   462
    }
slouken@8972
   463
slouken@8972
   464
    if (joystick->hwdata->removed) {
icculus@9433
   465
        joystick->force_recentering = SDL_TRUE;
slouken@8972
   466
    }
slouken@8972
   467
}
slouken@8972
   468
slouken@8972
   469
/* Function to close a joystick after use */
slouken@8972
   470
void
slouken@8972
   471
SDL_SYS_JoystickClose(SDL_Joystick * joystick)
slouken@8972
   472
{
slouken@8972
   473
    if (joystick->hwdata->bXInputDevice) {
slouken@8972
   474
        SDL_XINPUT_JoystickClose(joystick);
slouken@8972
   475
    } else {
slouken@8972
   476
        SDL_DINPUT_JoystickClose(joystick);
slouken@8972
   477
    }
slouken@8972
   478
slouken@8972
   479
    SDL_free(joystick->hwdata);
slouken@8972
   480
}
slouken@8972
   481
slouken@8972
   482
/* Function to perform any system-specific joystick related cleanup */
slouken@8972
   483
void
slouken@8972
   484
SDL_SYS_JoystickQuit(void)
slouken@8972
   485
{
slouken@8972
   486
    JoyStick_DeviceData *device = SYS_Joystick;
slouken@8972
   487
slouken@8972
   488
    while (device) {
slouken@8972
   489
        JoyStick_DeviceData *device_next = device->pNext;
slouken@8972
   490
        SDL_free(device->joystickname);
slouken@8972
   491
        SDL_free(device);
slouken@8972
   492
        device = device_next;
slouken@8972
   493
    }
slouken@8972
   494
    SYS_Joystick = NULL;
slouken@8972
   495
slouken@8972
   496
    if (s_threadJoystick) {
slouken@8972
   497
        SDL_LockMutex(s_mutexJoyStickEnum);
slouken@8972
   498
        s_bJoystickThreadQuit = SDL_TRUE;
slouken@8972
   499
        SDL_CondBroadcast(s_condJoystickThread); /* signal the joystick thread to quit */
slouken@8972
   500
        SDL_UnlockMutex(s_mutexJoyStickEnum);
slouken@8972
   501
        SDL_WaitThread(s_threadJoystick, NULL); /* wait for it to bugger off */
slouken@8972
   502
slouken@8972
   503
        SDL_DestroyMutex(s_mutexJoyStickEnum);
slouken@8972
   504
        SDL_DestroyCond(s_condJoystickThread);
slouken@8972
   505
        s_condJoystickThread= NULL;
slouken@8972
   506
        s_mutexJoyStickEnum = NULL;
slouken@8972
   507
        s_threadJoystick = NULL;
slouken@8972
   508
    }
slouken@8972
   509
slouken@8972
   510
    SDL_DINPUT_JoystickQuit();
slouken@8972
   511
    SDL_XINPUT_JoystickQuit();
slouken@10479
   512
slouken@10479
   513
    s_bDeviceAdded = SDL_FALSE;
slouken@10479
   514
    s_bDeviceRemoved = SDL_FALSE;
slouken@8972
   515
}
slouken@8972
   516
slouken@8972
   517
/* return the stable device guid for this device index */
slouken@8972
   518
SDL_JoystickGUID
slouken@8972
   519
SDL_SYS_JoystickGetDeviceGUID(int device_index)
slouken@8972
   520
{
slouken@8972
   521
    JoyStick_DeviceData *device = SYS_Joystick;
slouken@8972
   522
    int index;
slouken@8972
   523
slouken@8972
   524
    for (index = device_index; index > 0; index--)
slouken@8972
   525
        device = device->pNext;
slouken@8972
   526
slouken@8972
   527
    return device->guid;
slouken@8972
   528
}
slouken@8972
   529
slouken@8972
   530
SDL_JoystickGUID
slouken@8972
   531
SDL_SYS_JoystickGetGUID(SDL_Joystick * joystick)
slouken@8972
   532
{
slouken@8972
   533
    return joystick->hwdata->guid;
slouken@8972
   534
}
slouken@8972
   535
slouken@8972
   536
#endif /* SDL_JOYSTICK_DINPUT || SDL_JOYSTICK_XINPUT */
slouken@8972
   537
slouken@8972
   538
/* vi: set ts=4 sw=4 expandtab: */