1 files changed, 89 insertions, 0 deletions
diff --git a/src/lib/arch/win32/ArchTimeWindows.cpp b/src/lib/arch/win32/ArchTimeWindows.cpp
new file mode 100644
index 0000000..568a483
--- /dev/null
+++ b/src/lib/arch/win32/ArchTimeWindows.cpp
@@ -0,0 +1,89 @@
+/*
+ * barrier -- mouse and keyboard sharing utility
+ * Copyright (C) 2012-2016 Symless Ltd.
+ * Copyright (C) 2002 Chris Schoeneman
+ * 
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file LICENSE that should have accompanied this file.
+ * 
+ * This package is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "arch/win32/ArchTimeWindows.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
+
+#define MMNODRV         // Disable: Installable driver support
+#define MMNOSOUND       // Disable: Sound support
+#define MMNOWAVE        // Disable: Waveform support
+#define MMNOMIDI        // Disable: MIDI support
+#define MMNOAUX         // Disable: Auxiliary audio support
+#define MMNOMIXER       // Disable: Mixer support
+#define MMNOJOY         // Disable: Joystick support
+#define MMNOMCI         // Disable: MCI support
+#define MMNOMMIO        // Disable: Multimedia file I/O support
+#define MMNOMMSYSTEM    // Disable: General MMSYSTEM functions
+#include <MMSystem.h>
+
+typedef WINMMAPI DWORD (WINAPI *PTimeGetTime)(void);
+
+static double            s_freq       = 0.0;
+static HINSTANCE        s_mmInstance = NULL;
+static PTimeGetTime        s_tgt        = NULL;
+
+
+//
+// ArchTimeWindows
+//
+
+ArchTimeWindows::ArchTimeWindows()
+{
+    assert(s_freq == 0.0 || s_mmInstance == NULL);
+
+    LARGE_INTEGER freq;
+    if (QueryPerformanceFrequency(&freq) && freq.QuadPart != 0) {
+        s_freq = 1.0 / static_cast<double>(freq.QuadPart);
+    }
+    else {
+        // load winmm.dll and get timeGetTime
+        s_mmInstance = LoadLibrary("winmm");
+        if (s_mmInstance != NULL) {
+            s_tgt = (PTimeGetTime)GetProcAddress(s_mmInstance, "timeGetTime");
+        }
+    }
+}
+
+ArchTimeWindows::~ArchTimeWindows()
+{
+    s_freq = 0.0;
+    if (s_mmInstance == NULL) {
+        FreeLibrary(static_cast<HMODULE>(s_mmInstance));
+        s_tgt        = NULL;
+        s_mmInstance = NULL;
+    }
+}
+
+double
+ArchTimeWindows::time()
+{
+    // get time.  we try three ways, in order of descending precision
+    if (s_freq != 0.0) {
+        LARGE_INTEGER c;
+        QueryPerformanceCounter(&c);
+        return s_freq * static_cast<double>(c.QuadPart);
+    }
+    else if (s_tgt != NULL) {
+        return 0.001 * static_cast<double>(s_tgt());
+    }
+    else {
+        return 0.001 * static_cast<double>(GetTickCount());
+    }
+}