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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
52 lines
1.9 KiB
C
52 lines
1.9 KiB
C
#ifndef INTERNAL_THREAD_H /*-*-C-*-vi:se ft=c:*/
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#define INTERNAL_THREAD_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 Thread.
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*/
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#include "ruby/ruby.h" /* for VALUE */
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#include "ruby/intern.h" /* for rb_blocking_function_t */
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struct rb_thread_struct; /* in vm_core.h */
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/* thread.c */
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#define COVERAGE_INDEX_LINES 0
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#define COVERAGE_INDEX_BRANCHES 1
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#define COVERAGE_TARGET_LINES 1
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#define COVERAGE_TARGET_BRANCHES 2
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#define COVERAGE_TARGET_METHODS 4
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#define COVERAGE_TARGET_ONESHOT_LINES 8
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VALUE rb_obj_is_mutex(VALUE obj);
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VALUE rb_suppress_tracing(VALUE (*func)(VALUE), VALUE arg);
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void rb_thread_execute_interrupts(VALUE th);
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VALUE rb_get_coverages(void);
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int rb_get_coverage_mode(void);
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VALUE rb_default_coverage(int);
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VALUE rb_thread_shield_new(void);
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VALUE rb_thread_shield_wait(VALUE self);
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VALUE rb_thread_shield_release(VALUE self);
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VALUE rb_thread_shield_destroy(VALUE self);
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int rb_thread_to_be_killed(VALUE thread);
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void rb_mutex_allow_trap(VALUE self, int val);
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VALUE rb_uninterruptible(VALUE (*b_proc)(VALUE), VALUE data);
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VALUE rb_mutex_owned_p(VALUE self);
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RUBY_SYMBOL_EXPORT_BEGIN
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/* Temporary. This API will be removed (renamed). */
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VALUE rb_thread_io_blocking_region(rb_blocking_function_t *func, void *data1, int fd);
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/* thread.c (export) */
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int ruby_thread_has_gvl_p(void); /* for ext/fiddle/closure.c */
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RUBY_SYMBOL_EXPORT_END
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MJIT_SYMBOL_EXPORT_BEGIN
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int rb_threadptr_execute_interrupts(struct rb_thread_struct *th, int blocking_timing);
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MJIT_SYMBOL_EXPORT_END
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#endif /* INTERNAL_THREAD_H */
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