1 files changed, 48 insertions, 0 deletions
diff --git a/common/hash_table.h b/common/hash_table.h
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+++ b/common/hash_table.h
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+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2021  Symbiflow Authors
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef HASH_TABLE_H
+#define HASH_TABLE_H
+
+#if defined(NPNR_DISABLE_THREADS)
+#include <unordered_map>
+#include <unordered_set>
+#else
+#include <absl/container/flat_hash_map.h>
+#include <absl/container/flat_hash_set.h>
+#endif
+
+#include "nextpnr_namespaces.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+namespace HashTables {
+#if defined(NPNR_DISABLE_THREADS)
+template <typename Key, typename Value> using HashMap = std::unordered_map<Key, Value>;
+template <typename Value> using HashSet = std::unordered_set<Value>;
+#else
+template <typename Key, typename Value> using HashMap = absl::flat_hash_map<Key, Value>;
+template <typename Value> using HashSet = absl::flat_hash_set<Value>;
+#endif
+
+}; // namespace HashTables
+
+NEXTPNR_NAMESPACE_END
+
+#endif /* HASH_TABLE_H */