From 7b09710392d35fb55b52031d447a542d99fc6b4b Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Tue, 19 Aug 2014 17:10:03 -0400 Subject: Modularize the libdimension codebase. --- libdimension/internal/compiler.h | 71 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 libdimension/internal/compiler.h (limited to 'libdimension/internal/compiler.h') diff --git a/libdimension/internal/compiler.h b/libdimension/internal/compiler.h new file mode 100644 index 0000000..e3555a4 --- /dev/null +++ b/libdimension/internal/compiler.h @@ -0,0 +1,71 @@ +/************************************************************************* + * Copyright (C) 2010-2014 Tavian Barnes * + * * + * 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 * + * . * + *************************************************************************/ + +/** + * @file + * Internally-used compiler abstractions. + */ + +#ifndef DMNSN_INTERNAL_H +#error "Please include \"internal.h\" instead of this header directly." +#endif + +#include + +/** + * @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 -- cgit v1.2.3