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#ifndef RBIMPL_GC_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_GC_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 Registering values to the GC.
*/
#include "ruby/internal/config.h"
#ifdef STDC_HEADERS
# include <stddef.h> /* size_t */
#endif
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h> /* ssize_t */
#endif
#include "ruby/assert.h"
#include "ruby/internal/attr/cold.h"
#include "ruby/internal/attr/nonnull.h"
#include "ruby/internal/attr/noreturn.h"
#include "ruby/internal/attr/artificial.h"
#include "ruby/internal/attr/maybe_unused.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"
RBIMPL_SYMBOL_EXPORT_BEGIN()
#define RUBY_REF_EDGE(s, p) offsetof(s, p)
#define RUBY_REFS_LIST_PTR(l) (RUBY_DATA_FUNC)(l)
#define RUBY_REF_END SIZE_MAX
#define RUBY_REFERENCES(t) static const size_t t[]
#define RUBY_REFERENCES_START(t) RUBY_REFERENCES(t) = {
#define RUBY_REFERENCES_END RUBY_REF_END, };
/* gc.c */
RBIMPL_ATTR_COLD()
RBIMPL_ATTR_NORETURN()
/**
* Triggers out-of-memory error. If possible it raises ::rb_eNoMemError. But
* because we are running out of memory that is not always doable. This
* function tries hard to show something, but ultimately can die silently.
*
* @exception rb_eNoMemError Raises it if possible.
*/
void rb_memerror(void);
RBIMPL_ATTR_PURE()
/**
* Queries if the GC is busy.
*
* @retval 0 It isn't.
* @retval 1 It is.
*/
int rb_during_gc(void);
RBIMPL_ATTR_NONNULL((1))
/**
* Marks objects between the two pointers. This is one of the GC utility
* functions that you can call when you design your own
* ::rb_data_type_struct::dmark.
*
* @pre Continuous memory region from `start` to `end` shall be fully
* addressable.
* @param[out] start Pointer to an array of objects.
* @param[out] end Pointer that terminates the array of objects.
* @post Objects from `start` (included) to `end` (excluded) are marked.
*
* @internal
*
* `end` can be NULL... But that just results in no-op.
*/
void rb_gc_mark_locations(const VALUE *start, const VALUE *end);
/**
* Identical to rb_mark_hash(), except it marks only values of the table and
* leave their associated keys unmarked. This is one of the GC utility
* functions that you can call when you design your own
* ::rb_data_type_struct::dmark.
*
* @warning Of course it can break GC. Leave it unused if unsure.
* @param[in] tbl A table to mark.
* @post Values stored in `tbl` are marked.
*/
void rb_mark_tbl(struct st_table *tbl);
/**
* Identical to rb_mark_tbl(), except it marks objects using
* rb_gc_mark_movable(). This is one of the GC utility functions that you can
* call when you design your own ::rb_data_type_struct::dmark.
*
* @warning Of course it can break GC. Leave it unused if unsure.
* @param[in] tbl A table to mark.
* @post Values stored in `tbl` are marked.
*/
void rb_mark_tbl_no_pin(struct st_table *tbl);
/**
* Identical to rb_mark_hash(), except it marks only keys of the table and
* leave their associated values unmarked. This is one of the GC utility
* functions that you can call when you design your own
* ::rb_data_type_struct::dmark.
*
* @warning Of course it can break GC. Leave it unused if unsure.
* @param[in] tbl A table to mark.
* @post Keys stored in `tbl` are marked.
*/
void rb_mark_set(struct st_table *tbl);
/**
* Marks keys and values associated inside of the given table. This is one of
* the GC utility functions that you can call when you design your own
* ::rb_data_type_struct::dmark.
*
* @param[in] tbl A table to mark.
* @post Objects stored in `tbl` are marked.
*/
void rb_mark_hash(struct st_table *tbl);
/**
* Updates references inside of tables. After you marked values using
* rb_mark_tbl_no_pin(), the objects inside of the table could of course be
* moved. This function is to fixup those references. You can call this from
* your ::rb_data_type_struct::dcompact.
*
* @param[out] ptr A table that potentially includes moved references.
* @post Moved references, if any, are corrected.
*/
void rb_gc_update_tbl_refs(st_table *ptr);
/**
* Identical to rb_gc_mark(), except it allows the passed value be a
* non-object. For instance pointers to different type of memory regions are
* allowed here. Such values are silently ignored. This is one of the GC
* utility functions that you can call when you design your own
* ::rb_data_type_struct::dmark.
*
* @param[out] obj A possible object.
* @post `obj` is marked, if possible.
*/
void rb_gc_mark_maybe(VALUE obj);
/**
* Marks an object. This is one of the GC utility functions that you can call
* when you design your own ::rb_data_type_struct::dmark.
*
* @param[out] obj Arbitrary Ruby object.
* @post `obj` is marked.
*/
void rb_gc_mark(VALUE obj);
/**
* Maybe this is the only function provided for C extensions to control the
* pinning of objects, so let us describe it in detail. These days Ruby's GC
* is copying. As far as an object's physical address is guaranteed unused, it
* can move around the object space. Our GC engine rearranges these objects
* after it reclaims unreachable objects from our object space, so that the
* space is compact (improves memory locality). This is called the
* "compaction" phase, and works well most of the time... as far as there are
* no C extensions. C extensions complicate the scenario because Ruby core
* cannot detect any use of the physical address of an object inside of C
* functions. In order to prevent memory corruptions, objects observable from
* C extensions are "pinned"; they stick to where they are born until they die,
* just in case any C extensions touch their raw pointers. This variant of
* scheme is called "Mostly-Copying" garbage collector. Authors of C
* extensions, however, can extremely carefully write them to become
* compaction-aware. To do so avoid referring to a Ruby object from inside of
* your struct in the first place. But if that is not possible, use this
* function from your ::rb_data_type_struct::dmark then. This way objects
* marked using it are considered movable. If you chose this way you have to
* manually fix up locations of such moved pointers using rb_gc_location().
*
* @see Bartlett, Joel F., "Compacting Garbage Collection with Ambiguous
* Roots", ACM SIGPLAN Lisp Pointers Volume 1 Issue 6 pp. 3-12,
* April-May-June, 1988. https://doi.org/10.1145/1317224.1317225
*
* @param[in] obj Object that is movable.
* @post Values stored in `tbl` are marked.
*/
void rb_gc_mark_movable(VALUE obj);
/**
* Finds a new "location" of an object. An object can be moved on compaction.
* This function projects its new abode, or just returns the passed object if
* not moved. This is one of the GC utility functions that you can call when
* you design your own ::rb_data_type_struct::dcompact.
*
* @param[in] obj An object, possibly already moved to somewhere else.
* @return An object, which holds the current contents of former `obj`.
*/
VALUE rb_gc_location(VALUE obj);
/**
* Asserts that the passed object is no longer needed. Such objects are
* reclaimed sooner or later so this function is not mandatory. But sometimes
* you can know from your application knowledge that an object is surely dead
* at some point. Calling this as a hint can be a polite way.
*
* @param[out] obj Object, dead.
* @pre `obj` have never been passed to this function before.
* @post `obj` could be invalidated.
* @warning It is a failure to pass an object multiple times to this
* function.
* @deprecated This is now a no-op function.
*/
RBIMPL_ATTR_DEPRECATED(("this is now a no-op function"))
void rb_gc_force_recycle(VALUE obj);
/**
* Triggers a GC process. This was the only GC entry point that we had at the
* beginning. Over time our GC evolved. Now what this function does is just a
* very simplified variation of the entire GC algorithms. A series of
* procedures kicked by this API is called a "full" GC.
*
* - It immediately scans the entire object space to sort the dead.
* - It immediately reclaims any single dead bodies to reuse later.
*
* It is worth noting that the procedures above do not include evaluations of
* finalisers. They run later.
*
* @internal
*
* Finalisers are deferred until we can handle interrupts. See
* `rb_postponed_job_flush` in vm_trace.c.
*
* Of course there are GC that are not "full". For instance this one and the
* GC which runs when we are running out of memory are different. See
* `gc_profile_record_flag` defined in gc.c for the kinds of GC.
*
* In spite of the name this is not what everything that a GC can trigger. As
* of writing it seems this function does not trigger compaction. But this
* might change in future.
*/
void rb_gc(void);
/**
* Copy&paste an object's finaliser to another. This is one of the GC utility
* functions that you can call when you design your own `initialize_copy`,
* `initialize_dup`, `initialize_clone`.
*
* @param[out] dst Destination object.
* @param[in] src Source object.
* @post `dst` and `src` share the same finaliser.
*
* @internal
*
* But isn't it easier for you to call super, and let `Object#initialize_copy`
* call this function instead?
*/
void rb_gc_copy_finalizer(VALUE dst, VALUE src);
/**
* (Re-) enables GC. This makes sense only after you called rb_gc_disable().
*
* @retval RUBY_Qtrue GC was disabled before.
* @retval RUBY_Qfalse GC was enabled before.
* @post GC is enabled.
*
* @internal
*
* This is one of such exceptional functions that does not raise both Ruby
* exceptions and C++ exceptions.
*/
VALUE rb_gc_enable(void);
/**
* Disables GC. This prevents automatic GC runs when the process is running
* out of memory. Such situations shall result in rb_memerror(). However this
* does not prevent users from manually invoking rb_gc(). That should work.
* People abused this by disabling GC at the beginning of an event loop,
* process events without GC overheads, then manually force reclaiming garbage
* at the bottom of the loop. However because our GC is now much smarter than
* just calling rb_gc(), this technique is proven to be sub-optimal these days.
* It is believed that there is currently practically no needs of this
* function.
*
* @retval RUBY_Qtrue GC was disabled before.
* @retval RUBY_Qfalse GC was enabled before.
* @post GC is disabled.
*/
VALUE rb_gc_disable(void);
/**
* Identical to rb_gc(), except the return value.
*
* @return Always returns ::RUBY_Qnil.
*/
VALUE rb_gc_start(void);
/**
* Assigns a finaliser for an object. Each objects can have objects (typically
* blocks) that run immediately after that object dies. They are called
* finalisers of an object. This function associates a finaliser object with a
* target object.
*
* @note Note that finalisers run _after_ the object they finalise dies. You
* cannot for instance call its methods.
* @note If your finaliser references the object it finalises that object
* loses any chance to become a garbage; effectively leaks memory until
* the end of the process.
*
* @param[in] obj Target to finalise.
* @param[in] block Something `call`able.
* @exception rb_eRuntimeError Somehow `obj` cannot have finalisers.
* @exception rb_eFrozenError `obj` is frozen.
* @exception rb_eArgError `block` doesn't respond to `call`.
* @return The passed `block`.
* @post `block` runs after `obj` dies.
*/
VALUE rb_define_finalizer(VALUE obj, VALUE block);
/**
* Modifies the object so that it has no finalisers at all. This function is
* mainly provided for symmetry. No practical usages can be thought of.
*
* @param[out] obj Object to clear its finalisers.
* @exception rb_eFrozenError `obj` is frozen.
* @return The passed `obj`.
* @post `obj` has no finalisers.
* @note There is no way to undefine a specific part of many finalisers
* that `obj` could have. All you can do is to clear them all.
*/
VALUE rb_undefine_finalizer(VALUE obj);
/**
* Identical to rb_gc_stat(), with "count" parameter.
*
* @return Lifetime total number of runs of GC.
*/
size_t rb_gc_count(void);
/**
* Obtains various GC related profiles. The parameter can be either a Symbol
* or a Hash. If a Hash is passed, it is filled with everything currently
* available. If a Symbol is passed just that portion is returned.
*
* Possible variations of keys you can pass here change from version to
* version. You can get the list of known keys by passing an empty hash and
* let it be filled.
*
* @param[in,out] key_or_buf A Symbol, or a Hash.
* @exception rb_eTypeError Neither Symbol nor Hash.
* @exception rb_eFrozenError Frozen hash is passed.
* @return In case a Hash is passed it returns 0. Otherwise the
* profile value associated with the given key is returned.
* @post In case a Hash is passed it is filled with values.
*/
size_t rb_gc_stat(VALUE key_or_buf);
/**
* Obtains various info regarding the most recent GC run. This includes for
* instance the reason of the GC. The parameter can be either a Symbol or a
* Hash. If a Hash is passed, it is filled with everything currently
* available. If a Symbol is passed just that portion is returned.
*
* Possible variations of keys you can pass here change from version to
* version. You can get the list of known keys by passing an empty hash and
* let it be filled.
*
* @param[in,out] key_or_buf A Symbol, or a Hash.
* @exception rb_eTypeError Neither Symbol nor Hash.
* @exception rb_eFrozenError Frozen hash is passed.
* @return In case a Hash is passed it returns that hash. Otherwise
* the profile value associated with the given key is returned.
* @post In case a Hash is passed it is filled with values.
*/
VALUE rb_gc_latest_gc_info(VALUE key_or_buf);
/**
* Informs that there are external memory usages. Our GC runs when we are
* running out of memory. The amount of memory, however, can increase/decrease
* behind-the-scene. For instance DLLs can allocate memories using `mmap(2)`
* etc, which are opaque to us. Registering such external allocations using
* this function enables proper detection of how much memories an object used
* as a whole. That will trigger GCs more often than it would otherwise. You
* can also pass negative numbers here, to indicate that such external
* allocations are gone.
*
* @param[in] diff Amount of memory increased(+)/decreased(-).
*/
void rb_gc_adjust_memory_usage(ssize_t diff);
/**
* Inform the garbage collector that the global or static variable pointed by
* `valptr` stores a live Ruby object that should not be moved. Note that
* extensions should use this API on global constants instead of assuming
* constants defined in Ruby are always alive. Ruby code can remove global
* constants.
*
* Because this registration itself has a possibility to trigger a GC, this
* function must be called before any GC-able objects is assigned to the
* address pointed by `valptr`.
*/
void rb_gc_register_address(VALUE *valptr);
/**
* An alias for `rb_gc_register_address()`.
*/
void rb_global_variable(VALUE *);
/**
* Inform the garbage collector that a pointer previously passed to
* `rb_gc_register_address()` no longer points to a live Ruby object.
*/
void rb_gc_unregister_address(VALUE *valptr);
/**
* Inform the garbage collector that `object` is a live Ruby object that should
* not be moved.
*
* See also: rb_gc_register_address()
*/
void rb_gc_register_mark_object(VALUE object);
RBIMPL_SYMBOL_EXPORT_END()
/**
* @private
*
* @deprecated This macro once was a thing in the old days, but makes no sense
* any longer today. Exists here for backwards compatibility
* only. You can safely forget about it.
*/
#undef USE_RGENGC
#define USE_RGENGC 1
/**
* @deprecated This macro seems broken. Setting this to anything other than
* zero just doesn't compile. We need to KonMari.
*/
#ifndef USE_RGENGC_LOGGING_WB_UNPROTECT
# define USE_RGENGC_LOGGING_WB_UNPROTECT 0
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RArray. It has to be set at the time ruby itself compiles. Makes
* no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_ARRAY
# define RGENGC_WB_PROTECTED_ARRAY 1
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RHash. It has to be set at the time ruby itself compiles. Makes
* no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_HASH
# define RGENGC_WB_PROTECTED_HASH 1
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RStruct. It has to be set at the time ruby itself compiles. Makes
* no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_STRUCT
# define RGENGC_WB_PROTECTED_STRUCT 1
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RString. It has to be set at the time ruby itself compiles. Makes
* no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_STRING
# define RGENGC_WB_PROTECTED_STRING 1
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RObject. It has to be set at the time ruby itself compiles. Makes
* no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_OBJECT
# define RGENGC_WB_PROTECTED_OBJECT 1
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RRegexp. It has to be set at the time ruby itself compiles. Makes
* no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_REGEXP
# define RGENGC_WB_PROTECTED_REGEXP 1
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RMatch. It has to be set at the time ruby itself compiles. Makes
* no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_MATCH
# define RGENGC_WB_PROTECTED_MATCH 1
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RClass. It has to be set at the time ruby itself compiles. Makes
* no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_CLASS
# define RGENGC_WB_PROTECTED_CLASS 1
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RFloat. It has to be set at the time ruby itself compiles. Makes
* no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_FLOAT
# define RGENGC_WB_PROTECTED_FLOAT 1
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RComplex. It has to be set at the time ruby itself compiles.
* Makes no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_COMPLEX
# define RGENGC_WB_PROTECTED_COMPLEX 1
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RRational. It has to be set at the time ruby itself compiles.
* Makes no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_RATIONAL
# define RGENGC_WB_PROTECTED_RATIONAL 1
#endif
/**
* @private
*
* This is a compile-time flag to enable/disable write barrier for
* struct ::RBignum. It has to be set at the time ruby itself compiles. Makes
* no sense for 3rd parties.
*/
#ifndef RGENGC_WB_PROTECTED_BIGNUM
# define RGENGC_WB_PROTECTED_BIGNUM 1
#endif
/**
* @private
*
* @deprecated This macro once was a thing in the old days, but makes no sense
* any longer today. Exists here for backwards compatibility
* only. You can safely forget about it.
*
* @internal
*
* @shyouhei doesn't think anybody uses this right now.
*/
#ifndef RGENGC_WB_PROTECTED_NODE_CREF
# define RGENGC_WB_PROTECTED_NODE_CREF 1
#endif
/**
* @defgroup rgengc 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.
*
* @{
*/
/**
* Declaration of a "back" pointer. This is a write barrier for new reference
* from "old" generation to "young" generation. It writes `young` into
* `*slot`, which is a pointer inside of `old`.
*
* @param[in] old An old object.
* @param[in] slot A pointer inside of `old`.
* @param[out] young A young object.
*/
#define RB_OBJ_WRITE(old, slot, young) \
RBIMPL_CAST(rb_obj_write((VALUE)(old), (VALUE *)(slot), (VALUE)(young), __FILE__, __LINE__))
/**
* Identical to #RB_OBJ_WRITE(), except it doesn't write any values, but only a
* WB declaration. `oldv` is replaced value with `b` (not used in current
* Ruby).
*
* @param[in] old An old object.
* @param[in] oldv An object previously stored inside of `old`.
* @param[out] young A young object.
*/
#define RB_OBJ_WRITTEN(old, oldv, young) \
RBIMPL_CAST(rb_obj_written((VALUE)(old), (VALUE)(oldv), (VALUE)(young), __FILE__, __LINE__))
/** @} */
#define OBJ_PROMOTED_RAW RB_OBJ_PROMOTED_RAW /**< @old{RB_OBJ_PROMOTED_RAW} */
#define OBJ_PROMOTED RB_OBJ_PROMOTED /**< @old{RB_OBJ_PROMOTED} */
#define OBJ_WB_UNPROTECT RB_OBJ_WB_UNPROTECT /**< @old{RB_OBJ_WB_UNPROTECT} */
/**
* Asserts that the passed object is not fenced by write barriers. Objects of
* such property do not contribute to generational GCs. They are scanned
* always.
*
* @param[out] x An object that would not be protected by the barrier.
*/
#define RB_OBJ_WB_UNPROTECT(x) rb_obj_wb_unprotect(x, __FILE__, __LINE__)
/**
* Identical to #RB_OBJ_WB_UNPROTECT(), except it can also assert that the
* given object is of given type.
*
* @param[in] type One of `ARRAY`, `STRING`, etc.
* @param[out] obj An object of `type` that would not be protected.
*
* @internal
*
* @shyouhei doesn't understand why this has to be visible from extensions.
*/
#define RB_OBJ_WB_UNPROTECT_FOR(type, obj) \
(RGENGC_WB_PROTECTED_##type ? OBJ_WB_UNPROTECT(obj) : obj)
/**
* @private
*
* This is an implementation detail of rb_obj_wb_unprotect(). People don't use
* it directly.
*/
#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()
/**
* This is the implementation of #RB_OBJ_WRITE(). People don't use it
* directly.
*
* @param[in] old An object that points to `young`.
* @param[out] young An object that is referenced from `old`.
*/
void rb_gc_writebarrier(VALUE old, VALUE young);
/**
* This is the implementation of #RB_OBJ_WB_UNPROTECT(). People don't use it
* directly.
*
* @param[out] obj An object that does not participate in WB.
*/
void rb_gc_writebarrier_unprotect(VALUE obj);
#if USE_RGENGC_LOGGING_WB_UNPROTECT
/**
* @private
*
* This is the implementation of #RGENGC_LOGGING_WB_UNPROTECT(). People
* don't use it directly.
*
* @param[in] objptr Don't know why this is a pointer to void but in
* reality this is a pointer to an object that is about
* to be un-protected.
* @param[in] filename Pass C's `__FILE__` here.
* @param[in] line Pass C's `__LINE__` here.
*/
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()
/**
* This is the implementation of #RB_OBJ_PROMOTED(). People don't use it
* directly.
*
* @param[in] obj An object to query.
* @retval true The object is "promoted".
* @retval false The object is young. Have not experienced GC at all.
*/
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()
/**
* Tests if the object is "promoted" -- that is, whether the object experienced
* one or more GC marks.
*
* @param[in] obj An object to query.
* @retval true The object is "promoted".
* @retval false The object is young. Have not experienced GC at all.
* @note Hello, is anyone actively calling this function? @shyouhei have
* never seen any actual usages outside of the GC implementation
* itself.
*/
static inline bool
RB_OBJ_PROMOTED(VALUE obj)
{
if (! RB_FL_ABLE(obj)) {
return false;
}
else {
return RB_OBJ_PROMOTED_RAW(obj);
}
}
/**
* This is the implementation of #RB_OBJ_WB_UNPROTECT(). People don't use it
* directly.
*
* @param[out] x An object that does not participate in WB.
* @param[in] filename C's `__FILE__` of the caller function.
* @param[in] line C's `__LINE__` of the caller function.
* @return x
*/
static inline VALUE
rb_obj_wb_unprotect(
VALUE x,
RBIMPL_ATTR_MAYBE_UNUSED()
const char *filename,
RBIMPL_ATTR_MAYBE_UNUSED()
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;
}
/**
* @private
*
* This is the implementation of #RB_OBJ_WRITTEN(). People don't use it
* directly.
*
* @param[in] a An old object.
* @param[in] oldv An object previously stored inside of `old`.
* @param[out] b A young object.
* @param[in] filename C's `__FILE__` of the caller function.
* @param[in] line C's `__LINE__` of the caller function.
* @return a
*/
static inline VALUE
rb_obj_written(
VALUE a,
RBIMPL_ATTR_MAYBE_UNUSED()
VALUE oldv,
VALUE b,
RBIMPL_ATTR_MAYBE_UNUSED()
const char *filename,
RBIMPL_ATTR_MAYBE_UNUSED()
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;
}
/**
* @private
*
* This is the implementation of #RB_OBJ_WRITE(). People don't use it
* directly.
*
* @param[in] a An old object.
* @param[in] slot A pointer inside of `old`.
* @param[out] b A young object.
* @param[in] filename C's `__FILE__` of the caller function.
* @param[in] line C's `__LINE__` of the caller function.
* @return a
*/
static inline VALUE
rb_obj_write(
VALUE a, VALUE *slot, VALUE b,
RBIMPL_ATTR_MAYBE_UNUSED()
const char *filename,
RBIMPL_ATTR_MAYBE_UNUSED()
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_GC_H */