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Add hid_init() and hid_exit to Windows.

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This commit is contained in:
Alan Ott
2011-09-12 14:09:03 -04:00
parent 816deccbd4
commit 2b7d08f6c6
1 changed files with 37 additions and 14 deletions
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windows/hid.cpp
+37 -14
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@@ -118,6 +118,7 @@ extern "C" {
static HidD_FreePreparsedData_ HidD_FreePreparsedData;
static HidP_GetCaps_ HidP_GetCaps;
static HMODULE lib_handle = NULL;
static BOOLEAN initialized = FALSE;
#endif // HIDAPI_USE_DDK
@@ -180,11 +181,11 @@ static void register_error(hid_device *device, const char *op)
}
#ifndef HIDAPI_USE_DDK
static void lookup_functions()
static int lookup_functions()
{
HMODULE lib = LoadLibraryA("hid.dll");
if (lib) {
#define RESOLVE(x) x = (x##_)GetProcAddress(lib, #x);
lib_handle = LoadLibraryA("hid.dll");
if (lib_handle) {
#define RESOLVE(x) x = (x##_)GetProcAddress(lib_handle, #x); if (!x) return -1;
RESOLVE(HidD_GetAttributes);
RESOLVE(HidD_GetSerialNumberString);
RESOLVE(HidD_GetManufacturerString);
@@ -195,10 +196,10 @@ static void lookup_functions()
RESOLVE(HidD_GetPreparsedData);
RESOLVE(HidD_FreePreparsedData);
RESOLVE(HidP_GetCaps);
//FreeLibrary(lib);
#undef RESOLVE
}
initialized = TRUE;
else
return -1;
}
#endif
@@ -233,6 +234,31 @@ static HANDLE open_device(const char *path)
return handle;
}
int HID_API_EXPORT hid_init(void)
{
#ifndef HIDAPI_USE_DDK
if (!initialized) {
if (lookup_functions() < 0) {
hid_exit();
return -1;
}
initialized = TRUE;
}
#endif
return 0;
}
int HID_API_EXPORT hid_exit(void)
{
#ifndef HIDAPI_USE_DDK
if (lib_handle)
FreeLibrary(lib_handle);
lib_handle = NULL;
initialized = FALSE;
#endif
return 0;
}
struct hid_device_info HID_API_EXPORT * HID_API_CALL hid_enumerate(unsigned short vendor_id, unsigned short product_id)
{
BOOL res;
@@ -247,10 +273,8 @@ struct hid_device_info HID_API_EXPORT * HID_API_CALL hid_enumerate(unsigned shor
HDEVINFO device_info_set = INVALID_HANDLE_VALUE;
int device_index = 0;
#ifndef HIDAPI_USE_DDK
if (!initialized)
lookup_functions();
#endif
if (hid_init() < 0)
return NULL;
// Initialize the Windows objects.
devinfo_data.cbSize = sizeof(SP_DEVINFO_DATA);
@@ -500,10 +524,9 @@ HID_API_EXPORT hid_device * HID_API_CALL hid_open_path(const char *path)
BOOLEAN res;
NTSTATUS nt_res;
#ifndef HIDAPI_USE_DDK
if (!initialized)
lookup_functions();
#endif
if (hid_init() < 0) {
return NULL;
}
dev = new_hid_device();