Make Timestamp::current_time work on Windows

src/timestamp.cpp

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2016, Matias Fontanini
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following disclaimer
+ *   in the documentation and/or other materials provided with the
+ *   distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifdef _WIN32
+    #include <winsock2.h>
+    #include <windows.h>
+#else
+    #include <sys/time.h>
+#endif
+#include "timestamp.h"
+
+namespace Tins {
+
+const int MICROSECONDS_IN_SECOND = 1000000;
+
+Timestamp Timestamp::current_time() {
+    #ifdef _WIN32
+        FILETIME file_time;
+        GetSystemTimeAsFileTime(&file_time);
+        uint64_t timestamp = file_time.dwHighDateTime;
+        timestamp = timestamp << 32;
+        timestamp |= file_time.dwLowDateTime;
+        // Convert to microseconds
+        timestamp /= 10;
+        // Change the epoch to POSIX epoch
+        timestamp -= 11644473600000000ULL;
+        return Timestamp(timestamp);
+    #else
+        timeval tv;
+        gettimeofday(&tv, 0);
+        return tv;
+    #endif
+}
+
+
+Timestamp::Timestamp()
+: timestamp_(0) {
+
+}
+
+Timestamp::Timestamp(const timeval& time_val) {
+    timestamp_ = time_val.tv_sec * MICROSECONDS_IN_SECOND + time_val.tv_usec;
+}
+
+Timestamp::Timestamp(uint64_t value)
+: timestamp_(value) {
+
+}
+
+Timestamp::seconds_type Timestamp::seconds() const {
+    return timestamp_ / MICROSECONDS_IN_SECOND;
+}
+
+Timestamp::microseconds_type Timestamp::microseconds() const {
+    return timestamp_ % MICROSECONDS_IN_SECOND;
+}
+
+} // Tins