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[2026-03 LWG Motion 8] P3936R1 Safer atomic_ref::address (FR-030-310) #8893

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[2026-03 LWG Motion 8] P3936R1 Safer atomic_ref::address (FR-030-310) #8893

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2 changes: 1 addition & 1 deletion source/support.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -594,7 +594,7 @@
#define @\defnlibxname{cpp_lib_atomic_lock_free_type_aliases}@ 201907L // also in \libheader{atomic}
#define @\defnlibxname{cpp_lib_atomic_min_max}@ 202506L // freestanding, also in \libheader{atomic}
#define @\defnlibxname{cpp_lib_atomic_reductions}@ 202506L // freestanding, also in \libheader{atomic}
#define @\defnlibxname{cpp_lib_atomic_ref}@ 202411L // freestanding, also in \libheader{atomic}
#define @\defnlibxname{cpp_lib_atomic_ref}@ 202603L // freestanding, also in \libheader{atomic}
#define @\defnlibxname{cpp_lib_atomic_shared_ptr}@ 201711L // also in \libheader{memory}
#define @\defnlibxname{cpp_lib_atomic_value_initialization}@ 201911L // freestanding, also in \libheader{atomic}, \libheader{memory}
#define @\defnlibxname{cpp_lib_atomic_wait}@ 201907L // freestanding, also in \libheader{atomic}
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18 changes: 13 additions & 5 deletions source/threads.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -2397,6 +2397,10 @@

\rSec2[atomics.general]{General}

\pnum
Let \tcode{\placeholdernc{COPYCV}(FROM, TO)} be an alias for type \tcode{TO}
with the addition of \tcode{FROM}'s top-level cv-qualifiers.

\pnum
Subclause \ref{atomics} describes components for fine-grained atomic access.
This access is provided via operations on atomic objects.
Expand Down Expand Up @@ -3153,6 +3157,7 @@

public:
using value_type = remove_cv_t<T>;
using @\exposid{address-return-type}@ = @\placeholdernc{COPYCV}@(T, void)*; // \expos
static constexpr size_t required_alignment = @\impdefx{required alignment for \tcode{atomic_ref} type's operations}@;

static constexpr bool is_always_lock_free = @\impdefx{whether a given \tcode{atomic_ref} type's operations are always lock free}@;
Expand Down Expand Up @@ -3183,7 +3188,7 @@
constexpr void wait(value_type, memory_order = memory_order::seq_cst) const noexcept;
constexpr void notify_one() const noexcept;
constexpr void notify_all() const noexcept;
constexpr T* address() const noexcept;
constexpr @\exposid{address-return-type}@ address() const noexcept;
};
}
\end{codeblock}
Expand Down Expand Up @@ -3613,7 +3618,7 @@

\indexlibrarymember{address}{atomic_ref<T>}%
\begin{itemdecl}
constexpr T* address() const noexcept;
constexpr @\exposid{address-return-type}@ address() const noexcept;
\end{itemdecl}

\begin{itemdescr}
Expand Down Expand Up @@ -3650,6 +3655,7 @@
public:
using value_type = remove_cv_t<@\placeholder{integral-type}@>;
using difference_type = value_type;
using @\exposid{address-return-type}@ = @\placeholdernc{COPYCV}@(@\placeholder{integral-type}@, void)*; // \expos
static constexpr size_t required_alignment = @\impdefx{required alignment for \tcode{atomic_ref} type's operations}@;

static constexpr bool is_always_lock_free = @\impdefx{whether a given \tcode{atomic_ref} type's operations are always lock free}@;
Expand Down Expand Up @@ -3720,7 +3726,7 @@
constexpr void wait(value_type, memory_order = memory_order::seq_cst) const noexcept;
constexpr void notify_one() const noexcept;
constexpr void notify_all() const noexcept;
constexpr @\placeholder{integral-type}@* address() const noexcept;
constexpr @\exposid{address-return-type}@ address() const noexcept;
};
}
\end{codeblock}
Expand Down Expand Up @@ -3874,6 +3880,7 @@
public:
using value_type = remove_cv_t<@\placeholder{floating-point-type}@>;
using difference_type = value_type;
using @\exposid{address-return-type}@ = @\placeholdernc{COPYCV}@(@\placeholder{floating-point-type}@, void)*; // \expos
static constexpr size_t required_alignment = @\impdefx{required alignment for \tcode{atomic_ref} type's operations}@;

static constexpr bool is_always_lock_free = @\impdefx{whether a given \tcode{atomic_ref} type's operations are always lock free}@;
Expand Down Expand Up @@ -3940,7 +3947,7 @@
memory_order = memory_order::seq_cst) const noexcept;
constexpr void notify_one() const noexcept;
constexpr void notify_all() const noexcept;
constexpr @\placeholder{floating-point-type}@* address() const noexcept;
constexpr @\exposid{address-return-type}@ address() const noexcept;
};
}
\end{codeblock}
Expand Down Expand Up @@ -4168,6 +4175,7 @@
public:
using value_type = remove_cv_t<@\placeholder{pointer-type}@>;
using difference_type = ptrdiff_t;
using @\exposid{address-return-type}@ = @\placeholdernc{COPYCV}@(@\placeholder{pointer-type}@, void)*; // \expos
static constexpr size_t required_alignment = @\impdefx{required alignment for \tcode{atomic_ref} type's operations}@;

static constexpr bool is_always_lock_free = @\impdefx{whether a given \tcode{atomic_ref} type's operations are always lock free}@;
Expand Down Expand Up @@ -4223,7 +4231,7 @@
constexpr void wait(value_type, memory_order = memory_order::seq_cst) const noexcept;
constexpr void notify_one() const noexcept;
constexpr void notify_all() const noexcept;
constexpr @\placeholder{pointer-type}@* address() const noexcept;
constexpr @\placeholder{address-return-type}@ address() const noexcept;
};
}
\end{codeblock}
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