1 files changed, 71 insertions, 0 deletions
diff --git a/libdimension/internal/compiler.h b/libdimension/internal/compiler.h
new file mode 100644
index 0000000..e3555a4
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+++ b/libdimension/internal/compiler.h
@@ -0,0 +1,71 @@
+/*************************************************************************
+ * Copyright (C) 2010-2014 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
+ * Internally-used compiler abstractions.
+ */
+
+#ifndef DMNSN_INTERNAL_H
+#error "Please include \"internal.h\" instead of this header directly."
+#endif
+
+#include <stdalign.h>
+
+/**
+ * @def DMNSN_HOT
+ * Mark a function as a hot path.
+ */
+/**
+ * @def DMNSN_INTERNAL
+ * Mark a function as internal linkage.
+ */
+/**
+ * @def DMNSN_DESTRUCTOR
+ * Queue a function to run at program termination.
+ */
+/**
+ * @def DMNSN_LATE_DESTRUCTOR
+ * Queue a function to run at program termination, after those labeled
+ * DMNSN_DESTRUCTOR.
+ */
+#if DMNSN_GNUC
+  #define DMNSN_HOT             __attribute__((hot))
+  #define DMNSN_INTERNAL        __attribute__((visibility("hidden")))
+  #define DMNSN_DESTRUCTOR      __attribute__((destructor(102)))
+  #define DMNSN_LATE_DESTRUCTOR __attribute__((destructor(101)))
+#else
+  #define DMNSN_HOT
+  #define DMNSN_INTERNAL
+  #define DMNSN_DESTRUCTOR
+  #define DMNSN_LATE_DESTRUCTOR
+#endif
+
+/// Synonym for _Atomic that stdatomic.h doesn't define for some reason
+#define atomic _Atomic
+
+/// Nearly-compliant alloca variant
+#define DMNSN_ALLOCA(var, size) DMNSN_ALLOCA_IMPL(var, size, __LINE__)
+
+#define DMNSN_ALLOCA_IMPL(var, size, ctr) DMNSN_ALLOCA_IMPL2(var, size, ctr)
+
+#define DMNSN_ALLOCA_IMPL2(var, size, ctr)              \
+  alignas(max_align_t) char dmnsn_alloca##ctr[size];    \
+  var = (void *)dmnsn_alloca##ctr