SDL_hid.c File Reference

#include "../../SDL_internal.h"
#include "SDL_hid.h"

Include dependency graph for SDL_hid.c:

Go to the source code of this file.

Functions
int	WIN_LoadHIDDLL (void)
void	WIN_UnloadHIDDLL (void)

Variables
HidD_GetString_t	SDL_HidD_GetManufacturerString
HidD_GetString_t	SDL_HidD_GetProductString
HidD_GetPreparsedData_t	SDL_HidD_GetPreparsedData
HidD_FreePreparsedData_t	SDL_HidD_FreePreparsedData
HidP_GetCaps_t	SDL_HidP_GetCaps
HidP_GetButtonCaps_t	SDL_HidP_GetButtonCaps
HidP_GetValueCaps_t	SDL_HidP_GetValueCaps
HidP_MaxDataListLength_t	SDL_HidP_MaxDataListLength
HidP_GetData_t	SDL_HidP_GetData
static HMODULE	s_pHIDDLL = 0
static int	s_HIDDLLRefCount = 0

Function Documentation

WIN_LoadHIDDLL()

int WIN_LoadHIDDLL

(

void

)

Definition at line 43 of file SDL_hid.c.

{
    if (s_pHIDDLL) {
        SDL_assert(s_HIDDLLRefCount > 0);
        s_HIDDLLRefCount++;
        return 0;  /* already loaded */
    }
 
    s_pHIDDLL = LoadLibrary(L"hid.dll");
    if (!s_pHIDDLL) {
        return -1;
    }
 
    SDL_assert(s_HIDDLLRefCount == 0);
    s_HIDDLLRefCount = 1;
 
    SDL_HidD_GetManufacturerString = (HidD_GetString_t)GetProcAddress(s_pHIDDLL, "HidD_GetManufacturerString");
    SDL_HidD_GetProductString = (HidD_GetString_t)GetProcAddress(s_pHIDDLL, "HidD_GetProductString");
    SDL_HidD_GetPreparsedData = (HidD_GetPreparsedData_t)GetProcAddress(s_pHIDDLL, "HidD_GetPreparsedData");
    SDL_HidD_FreePreparsedData = (HidD_FreePreparsedData_t)GetProcAddress(s_pHIDDLL, "HidD_FreePreparsedData");
    SDL_HidP_GetCaps = (HidP_GetCaps_t)GetProcAddress(s_pHIDDLL, "HidP_GetCaps");
    SDL_HidP_GetButtonCaps = (HidP_GetButtonCaps_t)GetProcAddress(s_pHIDDLL, "HidP_GetButtonCaps");
    SDL_HidP_GetValueCaps = (HidP_GetValueCaps_t)GetProcAddress(s_pHIDDLL, "HidP_GetValueCaps");
    SDL_HidP_MaxDataListLength = (HidP_MaxDataListLength_t)GetProcAddress(s_pHIDDLL, "HidP_MaxDataListLength");
    SDL_HidP_GetData = (HidP_GetData_t)GetProcAddress(s_pHIDDLL, "HidP_GetData");
    if (!SDL_HidD_GetManufacturerString || !SDL_HidD_GetProductString || !SDL_HidD_GetPreparsedData ||
        !SDL_HidD_FreePreparsedData || !SDL_HidP_GetCaps || !SDL_HidP_GetButtonCaps ||
        !SDL_HidP_GetValueCaps || !SDL_HidP_MaxDataListLength || !SDL_HidP_GetData) {
        WIN_UnloadHIDDLL();
        return -1;
    }
 
    return 0;
}

References s_HIDDLLRefCount, s_pHIDDLL, SDL_assert, SDL_HidD_FreePreparsedData, SDL_HidD_GetManufacturerString, SDL_HidD_GetPreparsedData, SDL_HidD_GetProductString, SDL_HidP_GetButtonCaps, SDL_HidP_GetCaps, SDL_HidP_GetData, SDL_HidP_GetValueCaps, SDL_HidP_MaxDataListLength, and WIN_UnloadHIDDLL().

WIN_UnloadHIDDLL()

void WIN_UnloadHIDDLL

(

void

)

Definition at line 79 of file SDL_hid.c.

{
    if (s_pHIDDLL) {
        SDL_assert(s_HIDDLLRefCount > 0);
        if (--s_HIDDLLRefCount == 0) {
            FreeLibrary(s_pHIDDLL);
            s_pHIDDLL = NULL;
        }
    } else {
        SDL_assert(s_HIDDLLRefCount == 0);
    }
}

References NULL, s_HIDDLLRefCount, s_pHIDDLL, and SDL_assert.

Referenced by WIN_LoadHIDDLL().

Variable Documentation

s_HIDDLLRefCount

int s_HIDDLLRefCount = 0

static

Definition at line 39 of file SDL_hid.c.

Referenced by WIN_LoadHIDDLL(), and WIN_UnloadHIDDLL().

s_pHIDDLL

HMODULE s_pHIDDLL = 0

static

Definition at line 38 of file SDL_hid.c.

Referenced by WIN_LoadHIDDLL(), and WIN_UnloadHIDDLL().

SDL_HidD_FreePreparsedData

HidD_FreePreparsedData_t SDL_HidD_FreePreparsedData

Definition at line 31 of file SDL_hid.c.

Referenced by WIN_LoadHIDDLL().

SDL_HidD_GetManufacturerString

HidD_GetString_t SDL_HidD_GetManufacturerString

Definition at line 28 of file SDL_hid.c.

Referenced by WIN_LoadHIDDLL().

SDL_HidD_GetPreparsedData

HidD_GetPreparsedData_t SDL_HidD_GetPreparsedData

Definition at line 30 of file SDL_hid.c.

Referenced by WIN_LoadHIDDLL().

SDL_HidD_GetProductString

HidD_GetString_t SDL_HidD_GetProductString

Definition at line 29 of file SDL_hid.c.

Referenced by WIN_LoadHIDDLL().

SDL_HidP_GetButtonCaps

HidP_GetButtonCaps_t SDL_HidP_GetButtonCaps

Definition at line 33 of file SDL_hid.c.

Referenced by WIN_LoadHIDDLL().

SDL_HidP_GetCaps

HidP_GetCaps_t SDL_HidP_GetCaps

Definition at line 32 of file SDL_hid.c.

Referenced by WIN_LoadHIDDLL().

SDL_HidP_GetData

HidP_GetData_t SDL_HidP_GetData

Definition at line 36 of file SDL_hid.c.

Referenced by WIN_LoadHIDDLL().

SDL_HidP_GetValueCaps

HidP_GetValueCaps_t SDL_HidP_GetValueCaps

Definition at line 34 of file SDL_hid.c.

Referenced by WIN_LoadHIDDLL().

SDL_HidP_MaxDataListLength

HidP_MaxDataListLength_t SDL_HidP_MaxDataListLength

Definition at line 35 of file SDL_hid.c.

Referenced by WIN_LoadHIDDLL().