24 #ifndef PXR_BASE_TF_POINTER_AND_BITS_H
25 #define PXR_BASE_TF_POINTER_AND_BITS_H
31 #include <type_traits>
38 return val && !(val & (val - 1));
58 template <
typename U,
bool = false>
60 static constexpr uintptr_t
value =
alignof(U);
63 struct _AlignOf<U, true> {
64 static constexpr uintptr_t
value =
alignof(
void*);
70 static constexpr uintptr_t _GetAlign() noexcept {
74 static constexpr
bool _SupportsAtLeastOneBit() noexcept {
75 return _GetAlign() > 1 &&
Tf_IsPow2(_GetAlign());
82 static_assert(_SupportsAtLeastOneBit(),
83 "T's alignment does not support any bits");
88 : _ptrAndBits(_Combine(p, bits))
90 static_assert(_SupportsAtLeastOneBit(),
91 "T's alignment does not support any bits");
95 return _GetAlign() - 1;
119 template <
class Integral>
123 return static_cast<Integral
>(_GetBits());
128 template <
class Integral>
130 _SetBits(static_cast<uintptr_t>(
val));
139 template <
class Integral>
141 _ptrAndBits = _Combine(
ptr,
val);
155 return _AsInt(_ptrAndBits);
164 constexpr uintptr_t _GetBitMask()
const noexcept {
169 constexpr
T *_Combine(
T *
p, uintptr_t bits)
const noexcept {
170 return _AsPtr(_AsInt(
p) | (bits & _GetBitMask()));
175 constexpr uintptr_t _AsInt(
T *
p)
const noexcept {
181 constexpr
T *_AsPtr(uintptr_t i)
const noexcept {
186 constexpr
T *_GetPtr()
const noexcept {
187 return _AsPtr(_AsInt(_ptrAndBits) & ~_GetBitMask());
191 void _SetPtr(
T *
p) noexcept {
192 _ptrAndBits = _Combine(
p, _GetBits());
196 constexpr uintptr_t _GetBits()
const noexcept {
197 return _AsInt(_ptrAndBits) & _GetBitMask();
201 void _SetBits(uintptr_t bits) noexcept {
202 _ptrAndBits = _Combine(_GetPtr(), bits);
211 #endif // PXR_BASE_TF_POINTER_AND_BITS_H
#define ARCH_PRAGMA_FORCING_TO_BOOL
TfPointerAndBits & operator=(T *ptr) noexcept
Assignment. Leaves bits unmodified.
PXR_NAMESPACE_OPEN_SCOPE constexpr bool Tf_IsPow2(uintptr_t val)
void SetBits(Integral val) noexcept
Set the stored bits. No static range checking is performed.
GLuint const GLfloat * val
void Set(T *ptr, Integral val) noexcept
Set the pointer value to ptr and the bits to val.
void swap(T &lhs, T &rhs)
constexpr T * Get() const noexcept
Retrieve the pointer.
constexpr TfPointerAndBits() noexcept
constexpr T & operator*() const noexcept
Dereference.
constexpr uintptr_t GetLiteral() const noexcept
constexpr uintptr_t GetMaxValue() const
constexpr Integral BitsAs() const noexcept
Retrieve the stored bits as the integral type Integral.
void Set(T *ptr) noexcept
Set the pointer value to ptr.
void Swap(TfPointerAndBits &other) noexcept
Swap this PointerAndBits with other.
PXR_NAMESPACE_CLOSE_SCOPE PXR_NAMESPACE_OPEN_SCOPE
constexpr uintptr_t GetNumBitsValues() const
#define PXR_NAMESPACE_CLOSE_SCOPE
constexpr TfPointerAndBits(T *p, uintptr_t bits=0) noexcept
Constructor. Set the pointer to p, and the bits to bits.
GLsizei const GLfloat * value
constexpr T * operator->() const noexcept
Indirection.