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diff --git a/libdimension/internal/platform.h b/libdimension/internal/platform.h
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+++ b/libdimension/internal/platform.h
@@ -0,0 +1,67 @@
+/*************************************************************************
+ * Copyright (C) 2010-2011 Tavian Barnes <tavianator@tavianator.com>     *
+ *                                                                       *
+ * This file is part of The Dimension Library.                           *
+ *                                                                       *
+ * The Dimension Library is free software; you can redistribute it and/  *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version.                       *
+ *                                                                       *
+ * The Dimension Library 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  *
+ * Lesser General Public License for more details.                       *
+ *                                                                       *
+ * You should have received a copy of the GNU Lesser General Public      *
+ * License along with this program.  If not, see                         *
+ * <http://www.gnu.org/licenses/>.                                       *
+ *************************************************************************/
+
+/**
+ * @file
+ * Internal platform abstractions.
+ */
+
+#ifndef DMNSN_INTERNAL_PLATFORM_H
+#define DMNSN_INTERNAL_PLATFORM_H
+
+#include "internal.h"
+#include "dimension/platform.h"
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+
+/**
+ * Print a stack trace, if implemented for the current platform.
+ * @param[in,out] file  The file to which to write the stack trace.
+ */
+DMNSN_INTERNAL void dmnsn_backtrace(FILE *file);
+
+/**
+ * Is the calling thread the main thread?
+ * @return Whether this is the main execution thread, or \c true if we can't
+ *         tell.
+ */
+DMNSN_INTERNAL bool dmnsn_is_main_thread(void);
+
+/**
+ * Are we running on a little-endian computer?
+ * @return Whether the current architecture is little-endian.
+ */
+DMNSN_INTERNAL bool dmnsn_is_little_endian(void);
+
+/**
+ * How many CPUs are available?
+ * @return The number of CPUs available to dimension.
+ */
+DMNSN_INTERNAL size_t dmnsn_ncpus(void);
+
+/**
+ * Calculate process times.
+ * @param[out] timer  The timer in which to store the current total process
+ *                    times.
+ */
+DMNSN_INTERNAL void dmnsn_get_times(dmnsn_timer *timer);
+
+#endif // DMNSN_INTERNAL_PLATFORM_H