+#ifndef _BABELTRACE_COMPAT_UNISTD_H
+#define _BABELTRACE_COMPAT_UNISTD_H
+
+/*
+ * babeltrace/compat/unistd.h
+ *
+ * (C) Copyright 2016 - Michael Jeanson <mjeanson@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+
+#include <unistd.h>
+
+#ifdef __MINGW32__
+#include <windows.h>
+#include <errno.h>
+
+#define _SC_PAGESIZE 30
+
+static inline
+long bt_sysconf(int name)
+{
+ SYSTEM_INFO si;
+
+ switch(name) {
+ case _SC_PAGESIZE:
+ GetNativeSystemInfo(&si);
+ return si.dwPageSize;
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+}
+
+#else
+
+static inline
+long bt_sysconf(int name)
+{
+ return sysconf(name);
+}
+
+#endif
+#endif /* _BABELTRACE_COMPAT_UNISTD_H */