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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
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
#ifndef INTERNAL_VARIABLE_H /*-*-C-*-vi:se ft=c:*/
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#define INTERNAL_VARIABLE_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 variables.
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*/
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#include "ruby/3/config.h"
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#include <stddef.h> /* for size_t */
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#include "constant.h" /* for rb_const_entry_t */
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#include "ruby/3/stdbool.h" /* for bool */
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#include "ruby/ruby.h" /* for VALUE */
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/* global variable */
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#define ROBJECT_TRANSIENT_FLAG FL_USER13
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struct rb_global_variable; /* defined in variable.c */
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struct rb_global_entry {
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struct rb_global_variable *var;
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ID id;
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};
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/* variable.c */
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void rb_gc_mark_global_tbl(void);
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size_t rb_generic_ivar_memsize(VALUE);
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VALUE rb_search_class_path(VALUE);
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VALUE rb_attr_delete(VALUE, ID);
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VALUE rb_ivar_lookup(VALUE obj, ID id, VALUE undef);
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void rb_autoload_str(VALUE mod, ID id, VALUE file);
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VALUE rb_autoload_at_p(VALUE, ID, int);
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NORETURN(VALUE rb_mod_const_missing(VALUE,VALUE));
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rb_gvar_getter_t *rb_gvar_getter_function_of(const struct rb_global_entry *);
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rb_gvar_setter_t *rb_gvar_setter_function_of(const struct rb_global_entry *);
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bool rb_gvar_is_traced(const struct rb_global_entry *);
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void rb_gvar_readonly_setter(VALUE v, ID id, VALUE *_);
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static inline bool ROBJ_TRANSIENT_P(VALUE obj);
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static inline void ROBJ_TRANSIENT_SET(VALUE obj);
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static inline void ROBJ_TRANSIENT_UNSET(VALUE obj);
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RUBY_SYMBOL_EXPORT_BEGIN
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/* variable.c (export) */
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void rb_mark_generic_ivar(VALUE);
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void rb_mv_generic_ivar(VALUE src, VALUE dst);
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VALUE rb_const_missing(VALUE klass, VALUE name);
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int rb_class_ivar_set(VALUE klass, ID vid, VALUE value);
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void rb_iv_tbl_copy(VALUE dst, VALUE src);
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void rb_deprecate_constant(VALUE mod, const char *name);
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RUBY_SYMBOL_EXPORT_END
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MJIT_SYMBOL_EXPORT_BEGIN
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struct rb_global_entry *rb_global_entry(ID);
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VALUE rb_gvar_get(struct rb_global_entry *);
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VALUE rb_gvar_set(struct rb_global_entry *, VALUE);
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VALUE rb_gvar_defined(struct rb_global_entry *);
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struct st_table *rb_ivar_generic_ivtbl(void);
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void rb_const_warn_if_deprecated(const rb_const_entry_t *, VALUE, ID);
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MJIT_SYMBOL_EXPORT_END
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static inline bool
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ROBJ_TRANSIENT_P(VALUE obj)
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{
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#if USE_TRANSIENT_HEAP
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return FL_TEST_RAW(obj, ROBJECT_TRANSIENT_FLAG);
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#else
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return false;
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#endif
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}
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static inline void
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ROBJ_TRANSIENT_SET(VALUE obj)
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{
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#if USE_TRANSIENT_HEAP
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FL_SET_RAW(obj, ROBJECT_TRANSIENT_FLAG);
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#endif
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}
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static inline void
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ROBJ_TRANSIENT_UNSET(VALUE obj)
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{
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#if USE_TRANSIENT_HEAP
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FL_UNSET_RAW(obj, ROBJECT_TRANSIENT_FLAG);
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#endif
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}
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#endif /* INTERNAL_VARIABLE_H */
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