Call Windows API directly

We already bumped the OS requirement to Windows 7 and those functions
can be called directly without the need to load them first.

src/app/application.cpp

@@ -685,11 +685,8 @@ void Application::cleanup()
         m_window->hide();
 
 #ifdef Q_OS_WIN
-        typedef BOOL (WINAPI *PSHUTDOWNBRCREATE)(HWND, LPCWSTR);
-        const auto shutdownBRCreate = Utils::Misc::loadWinAPI<PSHUTDOWNBRCREATE>("User32.dll", "ShutdownBlockReasonCreate");
-        // Only available on Vista+
-        if (shutdownBRCreate)
-            shutdownBRCreate((HWND)m_window->effectiveWinId(), tr("Saving torrent progress...").toStdWString().c_str());
+        ::ShutdownBlockReasonCreate(reinterpret_cast<HWND>(m_window->effectiveWinId())
+            , tr("Saving torrent progress...").toStdWString().c_str());
 #endif // Q_OS_WIN
 
         // Do manual cleanup in MainWindow to force widgets
@@ -728,11 +725,7 @@ void Application::cleanup()
 #ifndef DISABLE_GUI
     if (m_window) {
 #ifdef Q_OS_WIN
-        using PSHUTDOWNBRDESTROY = BOOL (WINAPI *)(HWND);
-        const auto shutdownBRDestroy = Utils::Misc::loadWinAPI<PSHUTDOWNBRDESTROY>("User32.dll", "ShutdownBlockReasonDestroy");
-        // Only available on Vista+
-        if (shutdownBRDestroy)
-            shutdownBRDestroy(reinterpret_cast<HWND>(m_window->effectiveWinId()));
+        ::ShutdownBlockReasonDestroy(reinterpret_cast<HWND>(m_window->effectiveWinId()));
 #endif // Q_OS_WIN
         delete m_window;
         UIThemeManager::freeInstance();

src/app/qtlocalpeer/qtlocalpeer.cpp

@@ -116,14 +116,9 @@ QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
                  + QLatin1Char('-') + QString::number(idNum, 16);
 
 #if defined(Q_OS_WIN)
-    using PPROCESSIDTOSESSIONID = BOOL (WINAPI *)(DWORD, DWORD *);
-    const auto processIdToSessionId = Utils::Misc::loadWinAPI<PPROCESSIDTOSESSIONID>("kernel32.dll", "ProcessIdToSessionId");
-
-    if (processIdToSessionId) {
-        DWORD sessionId = 0;
-        processIdToSessionId(GetCurrentProcessId(), &sessionId);
-        socketName += (QLatin1Char('-') + QString::number(sessionId, 16));
-    }
+    DWORD sessionId = 0;
+    ::ProcessIdToSessionId(GetCurrentProcessId(), &sessionId);
+    socketName += (QLatin1Char('-') + QString::number(sessionId, 16));
 #else
     socketName += (QLatin1Char('-') + QString::number(::getuid(), 16));
 #endif

src/base/bittorrent/session.cpp

@@ -4531,23 +4531,15 @@ namespace
     QString convertIfaceNameToGuid(const QString &name)
     {
         // Under Windows XP or on Qt version <= 5.5 'name' will be a GUID already.
-        QUuid uuid(name);
+        const QUuid uuid(name);
         if (!uuid.isNull())
             return uuid.toString().toUpper(); // Libtorrent expects the GUID in uppercase
 
-        using PCONVERTIFACENAMETOLUID = NETIO_STATUS (WINAPI *)(const WCHAR *, PNET_LUID);
-        const auto ConvertIfaceNameToLuid = Utils::Misc::loadWinAPI<PCONVERTIFACENAMETOLUID>("Iphlpapi.dll", "ConvertInterfaceNameToLuidW");
-        if (!ConvertIfaceNameToLuid) return {};
-
-        using PCONVERTIFACELUIDTOGUID = NETIO_STATUS (WINAPI *)(const NET_LUID *, GUID *);
-        const auto ConvertIfaceLuidToGuid = Utils::Misc::loadWinAPI<PCONVERTIFACELUIDTOGUID>("Iphlpapi.dll", "ConvertInterfaceLuidToGuid");
-        if (!ConvertIfaceLuidToGuid) return {};
-
-        NET_LUID luid;
-        const LONG res = ConvertIfaceNameToLuid(name.toStdWString().c_str(), &luid);
+        NET_LUID luid {};
+        const LONG res = ::ConvertInterfaceNameToLuidW(name.toStdWString().c_str(), &luid);
         if (res == 0) {
             GUID guid;
-            if (ConvertIfaceLuidToGuid(&luid, &guid) == 0)
+            if (::ConvertInterfaceLuidToGuid(&luid, &guid) == 0)
                 return QUuid(guid).toString().toUpper();
         }
 

src/base/utils/misc.cpp

@@ -30,6 +30,7 @@
 
 #ifdef Q_OS_WIN
 #include <windows.h>
+#include <powrprof.h>
 #include <Shlobj.h>
 #else
 #include <sys/types.h>
@@ -117,16 +118,11 @@ void Utils::Misc::shutdownComputer(const ShutdownDialogAction &action)
     if (GetLastError() != ERROR_SUCCESS)
         return;
 
-    using PSETSUSPENDSTATE = BOOLEAN (WINAPI *)(BOOLEAN, BOOLEAN, BOOLEAN);
-    const auto setSuspendState = Utils::Misc::loadWinAPI<PSETSUSPENDSTATE>("PowrProf.dll", "SetSuspendState");
-
     if (action == ShutdownDialogAction::Suspend) {
-        if (setSuspendState)
-            setSuspendState(false, false, false);
+        ::SetSuspendState(false, false, false);
     }
     else if (action == ShutdownDialogAction::Hibernate) {
-        if (setSuspendState)
-            setSuspendState(true, false, false);
+        ::SetSuspendState(true, false, false);
     }
     else {
         const QString msg = QCoreApplication::translate("misc", "qBittorrent will shutdown the computer now because all downloads are complete.");

winconf.pri

@@ -34,7 +34,7 @@ win32-g++* {
 
     RC_FILE = qbittorrent_mingw.rc
 
-    LIBS += libadvapi32 libshell32 libuser32 libole32 libwsock32 libws2_32
+    LIBS += libadvapi32 libiphlpapi libole32 libpowrprof libshell32 libuser32 libwsock32 libws2_32
 }
 else:win32-msvc* {
     CONFIG -= embed_manifest_exe
@@ -42,7 +42,7 @@ else:win32-msvc* {
 
     RC_FILE = qbittorrent.rc
 
-    LIBS += advapi32.lib shell32.lib crypt32.lib User32.lib ole32.lib
+    LIBS += advapi32.lib crypt32.lib Iphlpapi.lib ole32.lib PowrProf.lib shell32.lib User32.lib
 }
 
 # See an example build configuration in "conf.pri.windows"