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/*
* Copyright 2012 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
/**
* Compiler-specific implementations for gcc.
*
* Refer to mongo/platform/compiler.h for usage documentation.
*/
#pragma once
#define MONGO_COMPILER_NORETURN __attribute__((__noreturn__))
#define MONGO_COMPILER_VARIABLE_UNUSED __attribute__((__unused__))
#define MONGO_COMPILER_ALIGN_TYPE(ALIGNMENT) __attribute__((__aligned__(ALIGNMENT)))
#define MONGO_COMPILER_ALIGN_VARIABLE(ALIGNMENT) __attribute__((__aligned__(ALIGNMENT)))
// NOTE(schwerin): These visibility and calling-convention macro definitions assume we're not using
// GCC/CLANG to target native Windows. If/when we decide to do such targeting, we'll need to change
// compiler flags on Windows to make sure we use an appropriate calling convention, and configure
// MONGO_COMPILER_API_EXPORT, MONGO_COMPILER_API_IMPORT and MONGO_COMPILER_API_CALLING_CONVENTION
// correctly. I believe "correctly" is the following:
//
// #ifdef _WIN32
// #define MONGO_COMIPLER_API_EXPORT __attribute__(( __dllexport__ ))
// #define MONGO_COMPILER_API_IMPORT __attribute__(( __dllimport__ ))
// #ifdef _M_IX86
// #define MONGO_COMPILER_API_CALLING_CONVENTION __attribute__((__cdecl__))
// #else
// #define MONGO_COMPILER_API_CALLING_CONVENTION
// #endif
// #else ... fall through to the definitions below.
#define MONGO_COMPILER_API_EXPORT __attribute__((__visibility__("default")))
#define MONGO_COMPILER_API_IMPORT
#define MONGO_COMPILER_API_CALLING_CONVENTION
#define MONGO_likely(x) static_cast<bool>(__builtin_expect(static_cast<bool>(x), 1))
#define MONGO_unlikely(x) static_cast<bool>(__builtin_expect(static_cast<bool>(x), 0))
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