[PATCH v3 1/2] winevulkan: Create JSON manifest and registry entry used by official Vulkan loader.
Brendan Shanks
bshanks at codeweavers.com
Tue Mar 24 13:50:05 CDT 2020
Hi Jacek,
Thanks for the feedback.
> On Mar 23, 2020, at 4:50 PM, Jacek Caban <jacek at codeweavers.com> wrote:
>
> Hi Brendan,
>
> On 23.03.2020 20:16, Brendan Shanks wrote:
>> +static BOOL writestr(HANDLE handle, const char *str)
>> +{
>> + DWORD written;
>> + return WriteFile(handle, str, strlen(str), &written, NULL);
>> +}
>
>
> It may be a matter of taste, but it doesn't seem worth a helper. You could just do that with a single WriteFile() call.
My concern with calling WriteFile directly is that I would have to duplicate the string literals (once for the arg and once for calling strlen()). That would be ok for simple one-word strings, but these include whitespace and escape characters, and could easily get out of sync without being visually obvious.
>
>> + writestr(file, "{\r\n");
>> + writestr(file, " \"file_format_version\": \"1.0.0\",\r\n");
>> + writestr(file, " \"ICD\": {\r\n");
>> + writestr(file, " \"library_path\": \"winevulkan.dll\",\r\n");
>
>
> It may not be too important in this case, but it's usually better to use full path in such places, something like a result of GetModuleFileNameW(). What do real IDSs use?
>
Here’s what the spec says:
"The "library_path" specifies either a filename, a relative pathname, or a full pathname to an ICD shared library file. If "library_path" specifies a relative pathname, it is relative to the path of the JSON manifest file. If "library_path" specifies a filename, the library must live in the system's shared object search path."
NVIDIA uses a relative path on Windows, and just a filename on Linux. I think you’re right that a full path would be best, I’ll add that with GetModuleFileName().
>
>> + writestr(file, " \"api_version\": \"" WINE_VK_SPEC_VERSION "\"\r\n");
>> + writestr(file, " }\r\n");
>> + writestr(file, "}\r\n");
>> + CloseHandle(file);
>> +
>> + result = RegCreateKeyExW(HKEY_LOCAL_MACHINE, vulkan_driversW,
>> + 0, NULL, 0, KEY_SET_VALUE, NULL, &key, NULL);
>> + if (result != ERROR_SUCCESS)
>> + { ERR("Unable to create registry key.\n"); return E_UNEXPECTED; }
>> +
>> + result = RegSetValueExW(key, path, 0, REG_DWORD, (const BYTE *)&zero, sizeof(zero));
>> + if (result != ERROR_SUCCESS)
>> + { ERR("Unable to set registry value.\n"); return E_UNEXPECTED; }
>
>
> Style aside, you leak a handle in second error path. Error handling could also be simplified a bit.
>
>
>> +HRESULT WINAPI DllUnregisterServer(void)
>> +{
>> + WCHAR path[MAX_PATH];
>> + LRESULT result;
>> + HKEY key;
>> +
>> + /* Remove the JSON manifest and registry key */
>> + TRACE("\n");
>> + GetSystemDirectoryW(path, ARRAY_SIZE(path));
>> + lstrcatW(path, winevulkan_jsonW);
>> + if (!DeleteFileW(path))
>> + ERR("Unable to delete JSON file.\n");
>> +
>> + result = RegOpenKeyExW(HKEY_LOCAL_MACHINE, vulkan_driversW,
>> + 0, KEY_SET_VALUE, &key);
>> + if (result != ERROR_SUCCESS)
>> + { ERR("Unable to open registry key.\n"); return E_UNEXPECTED; }
>
>
> This is not really an error.
>
>
>> +
>> + result = RegDeleteValueW(key, path);
>> + if (result != ERROR_SUCCESS)
>> + ERR("Unable to delete registry key.\n");
>> +
>> + RegCloseKey(key);
>> + return S_OK;
>> +}
>
>
> Those ERRs should we WARNs or removed. Eg. it's not really an error when it's ran with no winevulkan registered or if you run regsvr32 -u twice in a raw. We should report success and print no errors in such case.
Yes you’re right, I’ll fix all these.
Thanks,
Brendan
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