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According to MSVC manual (*1), cl.exe can skip including a header file when that: - contains #pragma once, or - starts with #ifndef, or - starts with #if ! defined. GCC has a similar trick (*2), but it acts more stricter (e. g. there must be _no tokens_ outside of #ifndef...#endif). Sun C lacked #pragma once for a looong time. Oracle Developer Studio 12.5 finally implemented it, but we cannot assume such recent version. This changeset modifies header files so that each of them include strictly one #ifndef...#endif. I believe this is the most portable way to trigger compiler optimizations. [Bug #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
#ifndef RUBY_THREAD_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RUBY_THREAD_H 1
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/**
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* @file
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* @author $Author: matz $
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* @date Tue Jul 10 17:35:43 JST 2012
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* @copyright Copyright (C) 2007 Yukihiro Matsumoto
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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*/
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#include "ruby/intern.h"
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#include "ruby/3/dllexport.h"
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/* flags for rb_nogvl */
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#define RB_NOGVL_INTR_FAIL (0x1)
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#define RB_NOGVL_UBF_ASYNC_SAFE (0x2)
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RUBY3_SYMBOL_EXPORT_BEGIN()
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void *rb_thread_call_with_gvl(void *(*func)(void *), void *data1);
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void *rb_thread_call_without_gvl(void *(*func)(void *), void *data1,
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rb_unblock_function_t *ubf, void *data2);
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void *rb_thread_call_without_gvl2(void *(*func)(void *), void *data1,
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rb_unblock_function_t *ubf, void *data2);
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/*
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* XXX: unstable/unapproved - out-of-tree code should NOT not depend
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* on this until it hits Ruby 2.6.1
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*/
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void *rb_nogvl(void *(*func)(void *), void *data1,
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rb_unblock_function_t *ubf, void *data2,
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int flags);
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#define RUBY_CALL_WO_GVL_FLAG_SKIP_CHECK_INTS_AFTER 0x01
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#define RUBY_CALL_WO_GVL_FLAG_SKIP_CHECK_INTS_
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RUBY3_SYMBOL_EXPORT_END()
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#endif /* RUBY_THREAD_H */
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