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https://github.com/jart/cosmopolitan.git
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9208c83f7a
- add vdso dump utility - tests now log stack usage - rename g_ftrace to __ftrace - make internal spinlocks go faster - add conformant c11 atomics library - function tracing now logs stack usage - make function call tracing thread safe - add -X unsecure (no ssl) mode to redbean - munmap() has more consistent behavior now - pacify fsync() calls on python unit tests - make --strace flag work better in redbean - start minimizing and documenting compiler flags
58 lines
3.5 KiB
C
58 lines
3.5 KiB
C
#ifndef COSMOPOLITAN_LIBC_BITS_ATOMIC_GCC_H_
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#define COSMOPOLITAN_LIBC_BITS_ATOMIC_GCC_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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/*───────────────────────────────────────────────────────────────────────────│─╗
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│ cosmopolitan § atomics » old gnu ─╬─│┼
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╚────────────────────────────────────────────────────────────────────────────│*/
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#define atomic_init(obj, value) ((void)(*(obj) = (value)))
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#define atomic_thread_fence(order) __sync_synchronize()
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#define atomic_signal_fence(order) __asm__ volatile("" ::: "memory")
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#define __atomic_apply_stride(object, operand) \
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(((__typeof__(__atomic_val(object)))0) + (operand))
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#define atomic_compare_exchange_strong_explicit(object, expected, desired, \
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success, failure) \
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__extension__({ \
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__typeof__(expected) __ep = (expected); \
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__typeof__(*__ep) __e = *__ep; \
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(void)(success); \
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(void)(failure); \
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(_Bool)((*__ep = __sync_val_compare_and_swap(object, __e, desired)) == \
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__e); \
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})
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#define atomic_compare_exchange_weak_explicit(object, expected, desired, \
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success, failure) \
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atomic_compare_exchange_strong_explicit(object, expected, desired, success, \
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failure)
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#if __has_builtin(__sync_swap)
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#define atomic_exchange_explicit(object, desired, order) \
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((void)(order), __sync_swap(object, desired))
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#else
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#define atomic_exchange_explicit(object, desired, order) \
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__extension__({ \
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__typeof__(object) __o = (object); \
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__typeof__(desired) __d = (desired); \
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(void)(order); \
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__sync_synchronize(); \
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__sync_lock_test_and_set(&__atomic_val(__o), __d); \
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})
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#endif
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#define atomic_fetch_add_explicit(object, operand, order) \
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((void)(order), \
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__sync_fetch_and_add(object, __atomic_apply_stride(object, operand)))
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#define atomic_fetch_and_explicit(object, operand, order) \
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((void)(order), __sync_fetch_and_and(object, operand))
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#define atomic_fetch_or_explicit(object, operand, order) \
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((void)(order), __sync_fetch_and_or(object, operand))
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#define atomic_fetch_sub_explicit(object, operand, order) \
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((void)(order), \
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__sync_fetch_and_sub(object, __atomic_apply_stride(object, operand)))
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#define atomic_fetch_xor_explicit(object, operand, order) \
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((void)(order), __sync_fetch_and_xor(object, operand))
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#define atomic_load_explicit(object, order) \
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((void)(order), __sync_fetch_and_add(object, 0))
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#define atomic_store_explicit(object, desired, order) \
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((void)atomic_exchange_explicit(object, desired, order))
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_BITS_ATOMIC_GCC_H_ */
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