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Simplify xinput dynamic linking

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This commit is contained in:
Brad Hughes 2016-03-02 15:05:42 -05:00
parent 39964e6b38
commit cb6f06ee30
1 changed files with 20 additions and 66 deletions
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86
src/osd/modules/input/input_xinput.cpp
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@ -26,6 +26,7 @@
#include "ui/ui.h" #include "ui/ui.h"
// MAMEOS headers // MAMEOS headers
#include "winutil.h"
#include "winmain.h" #include "winmain.h"
#include "window.h" #include "window.h"
@ -117,93 +118,46 @@ struct xinput_api_state
}; };
// Typedef for pointers to XInput Functions // Typedef for pointers to XInput Functions
typedef DWORD(__stdcall* PFN_XINPUTGETSTATE)(DWORD, XINPUT_STATE*); typedef lazy_loaded_function_p2<DWORD, DWORD, XINPUT_STATE*> xinput_get_state_fn;
typedef DWORD(__stdcall* PFN_XINPUTGETCAPS)(DWORD, DWORD, XINPUT_CAPABILITIES*); typedef lazy_loaded_function_p3<DWORD, DWORD, DWORD, XINPUT_CAPABILITIES*> xinput_get_caps_fn;
class xinput_interface class xinput_interface
{ {
private: private:
HMODULE m_xinput_module; const wchar_t* xinput_dll_names[2] = { L"xinput1_4.dll", L"xinput9_1_0.dll" };
PFN_XINPUTGETSTATE m_pfnXInputGetState;
PFN_XINPUTGETCAPS m_pfnXInputGetCapabilities;
bool m_initialized;
public:
xinput_get_state_fn XInputGetState;
xinput_get_caps_fn XInputGetCapabilities;
private:
xinput_interface() xinput_interface()
: m_xinput_module(NULL), : XInputGetState("XInputGetState", xinput_dll_names, ARRAY_LENGTH(xinput_dll_names)),
m_pfnXInputGetState(nullptr), XInputGetCapabilities("XInputGetCapabilities", xinput_dll_names, ARRAY_LENGTH(xinput_dll_names))
m_pfnXInputGetCapabilities(nullptr),
m_initialized(false)
{ {
} }
int initialize() int initialize()
{ {
if (m_initialized) int status;
return 0; status = XInputGetState.initialize();
if (status != 0)
m_xinput_module = load_xinput_library();
if (m_xinput_module == NULL)
{ {
osd_printf_error("Failed to load xinput library. Error: %u\n", (unsigned int)GetLastError()); osd_printf_error("Failed to initialize function pointer for %s. Error: %d\n", XInputGetState.name(), status);
return -1; return -1;
} }
if (load_xinput_exports() != 0) status = XInputGetCapabilities.initialize();
if (status != 0)
{ {
osd_printf_error("Failed to load exported XInput functions from library\n"); osd_printf_error("Failed to initialize function pointer for %s. Error: %d\n", XInputGetCapabilities.name(), status);
return -1; return -1;
} }
m_initialized = true;
return 0; return 0;
} }
DWORD load_xinput_exports()
{
m_pfnXInputGetState = (PFN_XINPUTGETSTATE)GetProcAddress(m_xinput_module, "XInputGetState");
m_pfnXInputGetCapabilities = (PFN_XINPUTGETCAPS)GetProcAddress(m_xinput_module, "XInputGetCapabilities");
if (m_pfnXInputGetState == nullptr
|| m_pfnXInputGetCapabilities == nullptr)
{
return ERROR_NOT_FOUND;
}
return 0;
}
static HMODULE load_xinput_library()
{
// Attempt to load the Windows 8/10 version of Xinput first
HMODULE module = LoadLibrary(L"xinput1_4.dll");
// Fall back to the one from DX SDK
if (module == NULL)
{
module = LoadLibrary(L"xinput9_1_0.dll");
}
// If we still didn't load it, fail
if (module == NULL)
{
osd_printf_warning("Could not load any verions of the XInput Library.\n");
SetLastError(ERROR_DLL_NOT_FOUND);
}
return module;
}
public: public:
inline DWORD XInputGetState(DWORD dwUserIndex, XINPUT_STATE* pState)
{
return m_pfnXInputGetState(dwUserIndex, pState);
}
inline DWORD XInputGetCapabilities(DWORD dwUserIndex, DWORD dwFlags, XINPUT_CAPABILITIES* pCapabilities)
{
return m_pfnXInputGetCapabilities(dwUserIndex, dwFlags, pCapabilities);
}
static DWORD get_interface(xinput_interface **ppinterface) static DWORD get_interface(xinput_interface **ppinterface)
{ {
static xinput_interface s_instance; static xinput_interface s_instance;
@ -234,10 +188,10 @@ public:
xinput_joystick_device(running_machine &machine, const char *name, input_module &module) xinput_joystick_device(running_machine &machine, const char *name, input_module &module)
: device_info(machine, name, DEVICE_CLASS_JOYSTICK, module), : device_info(machine, name, DEVICE_CLASS_JOYSTICK, module),
gamepad({0}), gamepad({0}),
xinput_state({0}) xinput_state({0}),
xinput_api(nullptr)
{ {
// Attempt to get the xinput interface // Attempt to get the xinput interface
xinput_api = nullptr;
xinput_interface::get_interface(&xinput_api); xinput_interface::get_interface(&xinput_api);
} }