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#ifndef RBIMPL_RGENGC_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_RGENGC_H
/**
* @file
* @author Ruby developers <ruby-core@ruby-lang.org>
* @copyright This file is a part of the programming language Ruby.
* Permission is hereby granted, to either redistribute and/or
* modify this file, provided that the conditions mentioned in the
* file COPYING are met. Consult the file for details.
* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are
* implementation details. Don't take them as canon. They could
* rapidly appear then vanish. The name (path) of this header file
* is also an implementation detail. Do not expect it to persist
* at the place it is now. Developers are free to move it anywhere
* anytime at will.
* @note To ruby-core: remember that this header can be possibly
* recursively included from extension libraries written in C++.
* Do not expect for instance `__VA_ARGS__` is always available.
* We assume C99 for ruby itself but we don't assume languages of
* extension libraries. They could be written in C++98.
* @brief RGENGC write-barrier APIs.
* @see Sasada, K., "Gradual write-barrier insertion into a Ruby
* interpreter", in proceedings of the 2019 ACM SIGPLAN
* International Symposium on Memory Management (ISMM 2019), pp
* 115-121, 2019. https://doi.org/10.1145/3315573.3329986
*/
#include "ruby/internal/attr/artificial.h"
#include "ruby/internal/attr/pure.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/special_consts.h"
#include "ruby/internal/stdbool.h"
#include "ruby/internal/value.h"
#include "ruby/assert.h"
#include "ruby/backward/2/attributes.h"
#undef USE_RGENGC
#define USE_RGENGC 1
#ifndef USE_RINCGC
# define USE_RINCGC 1
#endif
#ifndef USE_RGENGC_LOGGING_WB_UNPROTECT
# define USE_RGENGC_LOGGING_WB_UNPROTECT 0
#endif
#ifndef RGENGC_WB_PROTECTED_ARRAY
# define RGENGC_WB_PROTECTED_ARRAY 1
#endif
#ifndef RGENGC_WB_PROTECTED_HASH
# define RGENGC_WB_PROTECTED_HASH 1
#endif
#ifndef RGENGC_WB_PROTECTED_STRUCT
# define RGENGC_WB_PROTECTED_STRUCT 1
#endif
#ifndef RGENGC_WB_PROTECTED_STRING
# define RGENGC_WB_PROTECTED_STRING 1
#endif
#ifndef RGENGC_WB_PROTECTED_OBJECT
# define RGENGC_WB_PROTECTED_OBJECT 1
#endif
#ifndef RGENGC_WB_PROTECTED_REGEXP
# define RGENGC_WB_PROTECTED_REGEXP 1
#endif
#ifndef RGENGC_WB_PROTECTED_CLASS
# define RGENGC_WB_PROTECTED_CLASS 1
#endif
#ifndef RGENGC_WB_PROTECTED_FLOAT
# define RGENGC_WB_PROTECTED_FLOAT 1
#endif
#ifndef RGENGC_WB_PROTECTED_COMPLEX
# define RGENGC_WB_PROTECTED_COMPLEX 1
#endif
#ifndef RGENGC_WB_PROTECTED_RATIONAL
# define RGENGC_WB_PROTECTED_RATIONAL 1
#endif
#ifndef RGENGC_WB_PROTECTED_BIGNUM
# define RGENGC_WB_PROTECTED_BIGNUM 1
#endif
#ifndef RGENGC_WB_PROTECTED_NODE_CREF
# define RGENGC_WB_PROTECTED_NODE_CREF 1
#endif
/**
* @name Write barrier (WB) interfaces:
* @{
*
* @note The following core interfaces can be changed in the future. Please
* catch up if you want to insert WB into C-extensions correctly.
*/
/**
* WB for new reference from `a' to `b'. Write `b' into `*slot'. `slot' is a
* pointer in `a'.
*/
#define RB_OBJ_WRITE(a, slot, b) \
RBIMPL_CAST(rb_obj_write((VALUE)(a), (VALUE *)(slot), (VALUE)(b), __FILE__, __LINE__))
/**
* WB for new reference from `a' to `b'. This doesn't write any values, but
* only a WB declaration. `oldv' is replaced value with `b' (not used in
* current Ruby).
*/
#define RB_OBJ_WRITTEN(a, oldv, b) \
RBIMPL_CAST(rb_obj_written((VALUE)(a), (VALUE)(oldv), (VALUE)(b), __FILE__, __LINE__))
/** @} */
#define OBJ_PROMOTED_RAW RB_OBJ_PROMOTED_RAW
#define OBJ_PROMOTED RB_OBJ_PROMOTED
#define OBJ_WB_UNPROTECT RB_OBJ_WB_UNPROTECT
#define RB_OBJ_WB_UNPROTECT(x) rb_obj_wb_unprotect(x, __FILE__, __LINE__)
#define RB_OBJ_WB_UNPROTECT_FOR(type, obj) \
(RGENGC_WB_PROTECTED_##type ? OBJ_WB_UNPROTECT(obj) : obj)
#define RGENGC_LOGGING_WB_UNPROTECT rb_gc_unprotect_logging
/** @cond INTERNAL_MACRO */
#define RB_OBJ_PROMOTED_RAW RB_OBJ_PROMOTED_RAW
#define RB_OBJ_PROMOTED RB_OBJ_PROMOTED
/** @endcond */
RBIMPL_SYMBOL_EXPORT_BEGIN()
void rb_gc_writebarrier(VALUE a, VALUE b);
void rb_gc_writebarrier_unprotect(VALUE obj);
#if USE_RGENGC_LOGGING_WB_UNPROTECT
void rb_gc_unprotect_logging(void *objptr, const char *filename, int line);
#endif
RBIMPL_SYMBOL_EXPORT_END()
RBIMPL_ATTR_PURE_UNLESS_DEBUG()
RBIMPL_ATTR_ARTIFICIAL()
static inline bool
RB_OBJ_PROMOTED_RAW(VALUE obj)
{
RBIMPL_ASSERT_OR_ASSUME(RB_FL_ABLE(obj));
return RB_FL_ANY_RAW(obj, RUBY_FL_PROMOTED);
}
RBIMPL_ATTR_PURE_UNLESS_DEBUG()
RBIMPL_ATTR_ARTIFICIAL()
static inline bool
RB_OBJ_PROMOTED(VALUE obj)
{
if (! RB_FL_ABLE(obj)) {
return false;
}
else {
return RB_OBJ_PROMOTED_RAW(obj);
}
}
static inline VALUE
rb_obj_wb_unprotect(VALUE x, RB_UNUSED_VAR(const char *filename), RB_UNUSED_VAR(int line))
{
#if USE_RGENGC_LOGGING_WB_UNPROTECT
RGENGC_LOGGING_WB_UNPROTECT(RBIMPL_CAST((void *)x), filename, line);
#endif
rb_gc_writebarrier_unprotect(x);
return x;
}
static inline VALUE
rb_obj_written(VALUE a, RB_UNUSED_VAR(VALUE oldv), VALUE b, RB_UNUSED_VAR(const char *filename), RB_UNUSED_VAR(int line))
{
#if USE_RGENGC_LOGGING_WB_UNPROTECT
RGENGC_LOGGING_OBJ_WRITTEN(a, oldv, b, filename, line);
#endif
if (!RB_SPECIAL_CONST_P(b)) {
rb_gc_writebarrier(a, b);
}
return a;
}
static inline VALUE
rb_obj_write(VALUE a, VALUE *slot, VALUE b, RB_UNUSED_VAR(const char *filename), RB_UNUSED_VAR(int line))
{
#ifdef RGENGC_LOGGING_WRITE
RGENGC_LOGGING_WRITE(a, slot, b, filename, line);
#endif
*slot = b;
rb_obj_written(a, RUBY_Qundef /* ignore `oldv' now */, b, filename, line);
return a;
}
#endif /* RBIMPL_RGENGC_H */
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