> +++ b/platform/linux-generic/include/odp_bitset.h > @@ -0,0 +1,210 @@ > +/* Copyright (c) 2017, ARM Limited > + * All rights reserved. > + * > + * SPDX-License-Identifier: BSD-3-Clause > + */ > + > +#ifndef _ODP_BITSET_H_ > +#define _ODP_BITSET_H_ > + > +#include <odp_cpu.h> > + > +#include <limits.h> > + > +/************************************************************************ > ****** > + * bitset abstract data type > + > ************************************************************************** > ***/ > +/* This could be a struct of scalars to support larger bit sets */ > + > +/* > + * Size of atomic bit set. This limits the max number of threads, > + * scheduler groups and reorder windows. On ARMv8/64-bit and x86-64, the > + * (lock-free) max is 128 > + */ > + > +/* Find a suitable data type that supports lock-free atomic operations */ > +#if defined(__ARM_ARCH) && __ARM_ARCH == 8 && __ARM_64BIT_STATE == 1 &&
Why ifdef ARM? Why this code is not in arch directory ? -Petri > \ > + defined(__SIZEOF_INT128__) && __SIZEOF_INT128__ == 16 > +#define LOCKFREE16 > +typedef __int128 bitset_t; > +#define ATOM_BITSET_SIZE (CHAR_BIT * __SIZEOF_INT128__) > + > +#elif __GCC_ATOMIC_LLONG_LOCK_FREE == 2 && \ > + __SIZEOF_LONG_LONG__ != __SIZEOF_LONG__ > +typedef unsigned long long bitset_t; > +#define ATOM_BITSET_SIZE (CHAR_BIT * __SIZEOF_LONG_LONG__) > + > +#elif __GCC_ATOMIC_LONG_LOCK_FREE == 2 && __SIZEOF_LONG__ != > __SIZEOF_INT__ > +typedef unsigned long bitset_t; > +#define ATOM_BITSET_SIZE (CHAR_BIT * __SIZEOF_LONG__) > + > +#elif __GCC_ATOMIC_INT_LOCK_FREE == 2 > +typedef unsigned int bitset_t; > +#define ATOM_BITSET_SIZE (CHAR_BIT * __SIZEOF_INT__) > + > +#else > +/* Target does not support lock-free atomic operations */ > +typedef unsigned int bitset_t; > +#define ATOM_BITSET_SIZE (CHAR_BIT * __SIZEOF_INT__) > +#endif > + > +#if ATOM_BITSET_SIZE <= 32
