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#ifndef RBIMPL_RARRAY_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_RARRAY_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 Defines struct ::RArray.
*/
#include "ruby/internal/arithmetic/long.h"
#include "ruby/internal/attr/artificial.h"
#include "ruby/internal/attr/constexpr.h"
#include "ruby/internal/attr/maybe_unused.h"
#include "ruby/internal/attr/pure.h"
#include "ruby/internal/cast.h"
#include "ruby/internal/core/rbasic.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/fl_type.h"
#include "ruby/internal/rgengc.h"
#include "ruby/internal/stdbool.h"
#include "ruby/internal/value.h"
#include "ruby/internal/value_type.h"
#include "ruby/assert.h"
#ifndef USE_TRANSIENT_HEAP
# define USE_TRANSIENT_HEAP 1
#endif
#define RARRAY(obj) RBIMPL_CAST((struct RArray *)(obj))
#define RARRAY_EMBED_FLAG RARRAY_EMBED_FLAG
#define RARRAY_EMBED_LEN_MASK RARRAY_EMBED_LEN_MASK
#define RARRAY_EMBED_LEN_MAX RARRAY_EMBED_LEN_MAX
#define RARRAY_EMBED_LEN_SHIFT RARRAY_EMBED_LEN_SHIFT
#if USE_TRANSIENT_HEAP
# define RARRAY_TRANSIENT_FLAG RARRAY_TRANSIENT_FLAG
#else
# define RARRAY_TRANSIENT_FLAG 0
#endif
#define RARRAY_LEN rb_array_len
#define RARRAY_CONST_PTR rb_array_const_ptr
#define RARRAY_CONST_PTR_TRANSIENT rb_array_const_ptr_transient
/** @cond INTERNAL_MACRO */
#if defined(__fcc__) || defined(__fcc_version) || \
defined(__FCC__) || defined(__FCC_VERSION)
/* workaround for old version of Fujitsu C Compiler (fcc) */
# define FIX_CONST_VALUE_PTR(x) ((const VALUE *)(x))
#else
# define FIX_CONST_VALUE_PTR(x) (x)
#endif
#define RARRAY_EMBED_LEN RARRAY_EMBED_LEN
#define RARRAY_LENINT RARRAY_LENINT
#define RARRAY_TRANSIENT_P RARRAY_TRANSIENT_P
#define RARRAY_ASET RARRAY_ASET
#define RARRAY_PTR RARRAY_PTR
/** @endcond */
enum ruby_rarray_flags {
RARRAY_EMBED_FLAG = RUBY_FL_USER1,
/* RUBY_FL_USER2 is for ELTS_SHARED */
RARRAY_EMBED_LEN_MASK = RUBY_FL_USER4 | RUBY_FL_USER3
#if USE_TRANSIENT_HEAP
,
RARRAY_TRANSIENT_FLAG = RUBY_FL_USER13
#endif
};
enum ruby_rarray_consts {
RARRAY_EMBED_LEN_SHIFT = RUBY_FL_USHIFT + 3,
RARRAY_EMBED_LEN_MAX = RBIMPL_EMBED_LEN_MAX_OF(VALUE)
};
struct RArray {
struct RBasic basic;
union {
struct {
long len;
union {
long capa;
#if defined(__clang__) /* <- clang++ is sane */ || \
!defined(__cplusplus) /* <- C99 is sane */ || \
(__cplusplus > 199711L) /* <- C++11 is sane */
const
#endif
VALUE shared_root;
} aux;
const VALUE *ptr;
} heap;
const VALUE ary[RARRAY_EMBED_LEN_MAX];
} as;
};
RBIMPL_SYMBOL_EXPORT_BEGIN()
VALUE *rb_ary_ptr_use_start(VALUE ary);
void rb_ary_ptr_use_end(VALUE a);
#if USE_TRANSIENT_HEAP
void rb_ary_detransient(VALUE a);
#endif
RBIMPL_SYMBOL_EXPORT_END()
RBIMPL_ATTR_PURE_UNLESS_DEBUG()
RBIMPL_ATTR_ARTIFICIAL()
static inline long
RARRAY_EMBED_LEN(VALUE ary)
{
RBIMPL_ASSERT_TYPE(ary, RUBY_T_ARRAY);
RBIMPL_ASSERT_OR_ASSUME(RB_FL_ANY_RAW(ary, RARRAY_EMBED_FLAG));
VALUE f = RBASIC(ary)->flags;
f &= RARRAY_EMBED_LEN_MASK;
f >>= RARRAY_EMBED_LEN_SHIFT;
return RBIMPL_CAST((long)f);
}
RBIMPL_ATTR_PURE_UNLESS_DEBUG()
static inline long
rb_array_len(VALUE a)
{
RBIMPL_ASSERT_TYPE(a, RUBY_T_ARRAY);
if (RB_FL_ANY_RAW(a, RARRAY_EMBED_FLAG)) {
return RARRAY_EMBED_LEN(a);
}
else {
return RARRAY(a)->as.heap.len;
}
}
RBIMPL_ATTR_ARTIFICIAL()
static inline int
RARRAY_LENINT(VALUE ary)
{
return rb_long2int(RARRAY_LEN(ary));
}
RBIMPL_ATTR_PURE_UNLESS_DEBUG()
RBIMPL_ATTR_ARTIFICIAL()
static inline bool
RARRAY_TRANSIENT_P(VALUE ary)
{
RBIMPL_ASSERT_TYPE(ary, RUBY_T_ARRAY);
#if USE_TRANSIENT_HEAP
return RB_FL_ANY_RAW(ary, RARRAY_TRANSIENT_FLAG);
#else
return false;
#endif
}
RBIMPL_ATTR_PURE_UNLESS_DEBUG()
/* internal function. do not use this function */
static inline const VALUE *
rb_array_const_ptr_transient(VALUE a)
{
RBIMPL_ASSERT_TYPE(a, RUBY_T_ARRAY);
if (RB_FL_ANY_RAW(a, RARRAY_EMBED_FLAG)) {
return FIX_CONST_VALUE_PTR(RARRAY(a)->as.ary);
}
else {
return FIX_CONST_VALUE_PTR(RARRAY(a)->as.heap.ptr);
}
}
#if ! USE_TRANSIENT_HEAP
RBIMPL_ATTR_PURE_UNLESS_DEBUG()
#endif
/* internal function. do not use this function */
static inline const VALUE *
rb_array_const_ptr(VALUE a)
{
RBIMPL_ASSERT_TYPE(a, RUBY_T_ARRAY);
#if USE_TRANSIENT_HEAP
if (RARRAY_TRANSIENT_P(a)) {
rb_ary_detransient(a);
}
#endif
return rb_array_const_ptr_transient(a);
}
/* internal function. do not use this function */
static inline VALUE *
rb_array_ptr_use_start(VALUE a,
RBIMPL_ATTR_MAYBE_UNUSED()
int allow_transient)
{
RBIMPL_ASSERT_TYPE(a, RUBY_T_ARRAY);
#if USE_TRANSIENT_HEAP
if (!allow_transient) {
if (RARRAY_TRANSIENT_P(a)) {
rb_ary_detransient(a);
}
}
#endif
return rb_ary_ptr_use_start(a);
}
/* internal function. do not use this function */
static inline void
rb_array_ptr_use_end(VALUE a,
RBIMPL_ATTR_MAYBE_UNUSED()
int allow_transient)
{
RBIMPL_ASSERT_TYPE(a, RUBY_T_ARRAY);
rb_ary_ptr_use_end(a);
}
#define RBIMPL_RARRAY_STMT(flag, ary, var, expr) do { \
RBIMPL_ASSERT_TYPE((ary), RUBY_T_ARRAY); \
const VALUE rbimpl_ary = (ary); \
VALUE *var = rb_array_ptr_use_start(rbimpl_ary, (flag)); \
expr; \
rb_array_ptr_use_end(rbimpl_ary, (flag)); \
} while (0)
#define RARRAY_PTR_USE_START(a) rb_array_ptr_use_start(a, 0)
#define RARRAY_PTR_USE_END(a) rb_array_ptr_use_end(a, 0)
#define RARRAY_PTR_USE(ary, ptr_name, expr) \
RBIMPL_RARRAY_STMT(0, ary, ptr_name, expr)
#define RARRAY_PTR_USE_START_TRANSIENT(a) rb_array_ptr_use_start(a, 1)
#define RARRAY_PTR_USE_END_TRANSIENT(a) rb_array_ptr_use_end(a, 1)
#define RARRAY_PTR_USE_TRANSIENT(ary, ptr_name, expr) \
RBIMPL_RARRAY_STMT(1, ary, ptr_name, expr)
static inline VALUE *
RARRAY_PTR(VALUE ary)
{
RBIMPL_ASSERT_TYPE(ary, RUBY_T_ARRAY);
VALUE tmp = RB_OBJ_WB_UNPROTECT_FOR(ARRAY, ary);
return RBIMPL_CAST((VALUE *)RARRAY_CONST_PTR(tmp));
}
static inline void
RARRAY_ASET(VALUE ary, long i, VALUE v)
{
RARRAY_PTR_USE_TRANSIENT(ary, ptr,
RB_OBJ_WRITE(ary, &ptr[i], v));
}
/*
* :FIXME: we want to convert RARRAY_AREF into an inline function (to add rooms
* for more sanity checks). However there were situations where the address of
* this macro is taken i.e. &RARRAY_AREF(...). They cannot be possible if this
* is not a macro. Such usages are abuse, and we eliminated them internally.
* However we are afraid of similar things to remain in the wild. This macro
* remains as it is due to that. If we could warn such usages we can set a
* transition path, but currently no way is found to do so.
*/
#define RARRAY_AREF(a, i) RARRAY_CONST_PTR_TRANSIENT(a)[i]
#endif /* RBIMPL_RARRAY_H */
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