They all look mostly the same: a bunch of defines, typedefs and compiler
intrinsics or extensions. I indeed re-used clang's version to some degree,
basically because I don't really like __extension__, __auto_type and other
magic present in gcc. Also, gcc's stdatomic.h is totally incompatible with
C++, which is per se a good reason to avoid it. So, as for copyrights, I
believe it's close to impossible to implement atomics other way than in
gcc/clang/msvc/any-other-compiler. I simply followed the most simplistic
model. I can mention that we follow the same model, though.
ср, 27 янв. 2021 г., 00:42 Elijah Stone <elro...@elronnd.net>:
> This looks like this is a slightly pruned version of the llvm/clang
> stdatomic.h. If so, it needs a copyright notice. (Though I don't know
> why it would be better to use someone else's header for this purpose
> rather than vendoring one.)
>
> -E
>
> On Tue, 26 Jan 2021, Dmitry Selyutin wrote:
>
> > ---
> > include/stdatomic.h | 121 ++++++++++++++++++++++++++++++++++++++++++++
> > 1 file changed, 121 insertions(+)
> > create mode 100644 include/stdatomic.h
> >
> > diff --git a/include/stdatomic.h b/include/stdatomic.h
> > new file mode 100644
> > index 0000000..2088252
> > --- /dev/null
> > +++ b/include/stdatomic.h
> > @@ -0,0 +1,121 @@
> > +#include <stddef.h>
> > +#include <stdint.h>
> > +
> > +#ifdef __cplusplus
> > +extern "C" {
> > +#endif
> > +
> > +/* Memory ordering */
> > +typedef enum {
> > + memory_order_relaxed = __ATOMIC_RELAXED,
> > + memory_order_consume = __ATOMIC_CONSUME,
> > + memory_order_acquire = __ATOMIC_ACQUIRE,
> > + memory_order_release = __ATOMIC_RELEASE,
> > + memory_order_acq_rel = __ATOMIC_ACQ_REL,
> > + memory_order_seq_cst = __ATOMIC_SEQ_CST,
> > +} memory_order;
> > +
> > +/* Atomic typedefs */
> > +#ifdef __cplusplus
> > +typedef _Atomic(bool) atomic_bool;
> > +#else
> > +typedef _Atomic(_Bool) atomic_bool;
> > +#endif
> > +typedef _Atomic(char) atomic_char;
> > +typedef _Atomic(signed char) atomic_schar;
> > +typedef _Atomic(unsigned char) atomic_uchar;
> > +typedef _Atomic(short) atomic_short;
> > +typedef _Atomic(unsigned short) atomic_ushort;
> > +typedef _Atomic(int) atomic_int;
> > +typedef _Atomic(unsigned int) atomic_uint;
> > +typedef _Atomic(long) atomic_long;
> > +typedef _Atomic(unsigned long) atomic_ulong;
> > +typedef _Atomic(long long) atomic_llong;
> > +typedef _Atomic(unsigned long long) atomic_ullong;
> > +typedef _Atomic(uint_least16_t) atomic_char16_t;
> > +typedef _Atomic(uint_least32_t) atomic_char32_t;
> > +typedef _Atomic(wchar_t) atomic_wchar_t;
> > +typedef _Atomic(int_least8_t) atomic_int_least8_t;
> > +typedef _Atomic(uint_least8_t) atomic_uint_least8_t;
> > +typedef _Atomic(int_least16_t) atomic_int_least16_t;
> > +typedef _Atomic(uint_least16_t) atomic_uint_least16_t;
> > +typedef _Atomic(int_least32_t) atomic_int_least32_t;
> > +typedef _Atomic(uint_least32_t) atomic_uint_least32_t;
> > +typedef _Atomic(int_least64_t) atomic_int_least64_t;
> > +typedef _Atomic(uint_least64_t) atomic_uint_least64_t;
> > +typedef _Atomic(int_fast8_t) atomic_int_fast8_t;
> > +typedef _Atomic(uint_fast8_t) atomic_uint_fast8_t;
> > +typedef _Atomic(int_fast16_t) atomic_int_fast16_t;
> > +typedef _Atomic(uint_fast16_t) atomic_uint_fast16_t;
> > +typedef _Atomic(int_fast32_t) atomic_int_fast32_t;
> > +typedef _Atomic(uint_fast32_t) atomic_uint_fast32_t;
> > +typedef _Atomic(int_fast64_t) atomic_int_fast64_t;
> > +typedef _Atomic(uint_fast64_t) atomic_uint_fast64_t;
> > +typedef _Atomic(intptr_t) atomic_intptr_t;
> > +typedef _Atomic(uintptr_t) atomic_uintptr_t;
> > +typedef _Atomic(size_t) atomic_size_t;
> > +typedef _Atomic(ptrdiff_t) atomic_ptrdiff_t;
> > +typedef _Atomic(intmax_t) atomic_intmax_t;
> > +typedef _Atomic(uintmax_t) atomic_uintmax_t;
> > +
> > +/* Atomic flag */
> > +typedef struct {
> > + atomic_bool value;
> > +} atomic_flag;
> > +
> > +#define ATOMIC_FLAG_INIT { 0 }
> > +
> > +#define atomic_flag_test_and_set(object) \
> > + __c11_atomic_exchange(&(object)->value, 1, __ATOMIC_SEQ_CST)
> > +#define atomic_flag_test_and_set_explicit(object, order) \
> > + __c11_atomic_exchange(&(object)->value, 1, order)
> > +
> > +#define atomic_flag_clear(object) \
> > + __c11_atomic_store(&(object)->value, 0, __ATOMIC_SEQ_CST)
> > +#define atomic_flag_clear_explicit(object, order) \
> > + __c11_atomic_store(&(object)->value, 0, order)
> > +
> > +/* Generic routines */
> > +#define atomic_store(object, desired) \
> > + __atomic_store(object, desired, __ATOMIC_SEQ_CST)
> > +#define atomic_store_explicit __atomic_store
> > +
> > +#define atomic_load(object) \
> > + __atomic_load(object, __ATOMIC_SEQ_CST)
> > +#define atomic_load_explicit __atomic_load
> > +
> > +#define atomic_exchange(object, desired) \
> > + __atomic_exchange(object, desired, __ATOMIC_SEQ_CST)
> > +#define atomic_exchange_explicit __atomic_exchange
> > +
> > +#define atomic_compare_exchange_strong(object, expected, desired) \
> > + __atomic_compare_exchange_strong(object, expected, desired,
> > __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
> > +#define atomic_compare_exchange_strong_explicit
> > __atomic_compare_exchange_strong
> > +
> > +#define atomic_compare_exchange_weak(object, expected, desired) \
> > + __atomic_compare_exchange_weak(object, expected, desired,
> > __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
> > +#define atomic_compare_exchange_weak_explicit
> __atomic_compare_exchange_weak
> > +
> > +#define atomic_fetch_add(object, operand) \
> > + __atomic_fetch_add(object, operand, __ATOMIC_SEQ_CST)
> > +#define atomic_fetch_add_explicit __atomic_fetch_add
> > +
> > +#define atomic_fetch_sub(object, operand) \
> > + __atomic_fetch_sub(object, operand, __ATOMIC_SEQ_CST)
> > +#define atomic_fetch_sub_explicit __atomic_fetch_sub
> > +
> > +#define atomic_fetch_or(object, operand) \
> > + __atomic_fetch_or(object, operand, __ATOMIC_SEQ_CST)
> > +#define atomic_fetch_or_explicit __atomic_fetch_or
> > +
> > +#define atomic_fetch_xor(object, operand) \
> > + __atomic_fetch_xor(object, operand, __ATOMIC_SEQ_CST)
> > +#define atomic_fetch_xor_explicit __atomic_fetch_xor
> > +
> > +#define atomic_fetch_and(object, operand) \
> > + __atomic_fetch_and(object, operand, __ATOMIC_SEQ_CST)
> > +#define atomic_fetch_and_explicit __atomic_fetch_and
> > +
> > +#ifdef __cplusplus
> > +} /* extern "C" */
> > +#endif
> > --
> > 2.30.0
> >
> > --
> > Best regards,
> > Dmitry Selyutin
> >
> > _______________________________________________
> > Tinycc-devel mailing list
> > Tinycc-devel@nongnu.org
> > https://lists.nongnu.org/mailman/listinfo/tinycc-devel
>
> _______________________________________________
> Tinycc-devel mailing list
> Tinycc-devel@nongnu.org
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