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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
23 lines
983 B
C
23 lines
983 B
C
#ifndef INTERNAL_CONT_H /*-*-C-*-vi:se ft=c:*/
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#define INTERNAL_CONT_H
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/**
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* @file
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* @author Ruby developers <ruby-core@ruby-lang.org>
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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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* @brief Internal header for Fiber.
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*/
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#include "ruby/ruby.h" /* for VALUE */
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struct rb_thread_struct; /* in vm_core.h */
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struct rb_fiber_struct; /* in cont.c */
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/* cont.c */
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VALUE rb_obj_is_fiber(VALUE);
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void rb_fiber_reset_root_local_storage(struct rb_thread_struct *);
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void ruby_register_rollback_func_for_ensure(VALUE (*ensure_func)(VALUE), VALUE (*rollback_func)(VALUE));
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void rb_fiber_init_mjit_cont(struct rb_fiber_struct *fiber);
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#endif /* INTERNAL_CONT_H */
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