mirror of
https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
240 lines
7.6 KiB
C
240 lines
7.6 KiB
C
/*
|
|
* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
|
|
* Copyright (c) 1996-1999 by Silicon Graphics. All rights reserved.
|
|
* Copyright (c) 2003-2011 Hewlett-Packard Development Company, L.P.
|
|
* Copyright (c) 2013-2017 Ivan Maidanski
|
|
*
|
|
* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
|
|
* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
|
|
*
|
|
* Permission is hereby granted to use or copy this program
|
|
* for any purpose, provided the above notices are retained on all copies.
|
|
* Permission to modify the code and to distribute modified code is granted,
|
|
* provided the above notices are retained, and a notice that the code was
|
|
* modified is included with the above copyright notice.
|
|
*
|
|
*/
|
|
|
|
/* The following implementation assumes GCC 4.7 or later. */
|
|
/* For the details, see GNU Manual, chapter 6.52 (Built-in functions */
|
|
/* for memory model aware atomic operations). */
|
|
|
|
#define AO_GCC_ATOMIC_TEST_AND_SET
|
|
#include "../test_and_set_t_is_char.h"
|
|
|
|
#if defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1) \
|
|
|| defined(AO_GCC_FORCE_HAVE_CAS)
|
|
# define AO_GCC_HAVE_char_SYNC_CAS
|
|
#endif
|
|
|
|
#if (__SIZEOF_SHORT__ == 2 && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2)) \
|
|
|| defined(AO_GCC_FORCE_HAVE_CAS)
|
|
# define AO_GCC_HAVE_short_SYNC_CAS
|
|
#endif
|
|
|
|
#if (__SIZEOF_INT__ == 4 && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)) \
|
|
|| (__SIZEOF_INT__ == 8 && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8)) \
|
|
|| defined(AO_GCC_FORCE_HAVE_CAS)
|
|
# define AO_GCC_HAVE_int_SYNC_CAS
|
|
#endif
|
|
|
|
#if (__SIZEOF_SIZE_T__ == 4 && defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)) \
|
|
|| (__SIZEOF_SIZE_T__ == 8 \
|
|
&& defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8)) \
|
|
|| defined(AO_GCC_FORCE_HAVE_CAS)
|
|
# define AO_GCC_HAVE_SYNC_CAS
|
|
#endif
|
|
|
|
#undef AO_compiler_barrier
|
|
#define AO_compiler_barrier() __atomic_signal_fence(__ATOMIC_SEQ_CST)
|
|
|
|
#ifdef AO_UNIPROCESSOR
|
|
/* If only a single processor (core) is used, AO_UNIPROCESSOR could */
|
|
/* be defined by the client to avoid unnecessary memory barrier. */
|
|
AO_INLINE void
|
|
AO_nop_full(void)
|
|
{
|
|
AO_compiler_barrier();
|
|
}
|
|
# define AO_HAVE_nop_full
|
|
|
|
#else
|
|
AO_INLINE void
|
|
AO_nop_read(void)
|
|
{
|
|
__atomic_thread_fence(__ATOMIC_ACQUIRE);
|
|
}
|
|
# define AO_HAVE_nop_read
|
|
|
|
# ifndef AO_HAVE_nop_write
|
|
AO_INLINE void
|
|
AO_nop_write(void)
|
|
{
|
|
__atomic_thread_fence(__ATOMIC_RELEASE);
|
|
}
|
|
# define AO_HAVE_nop_write
|
|
# endif
|
|
|
|
AO_INLINE void
|
|
AO_nop_full(void)
|
|
{
|
|
/* __sync_synchronize() could be used instead. */
|
|
__atomic_thread_fence(__ATOMIC_SEQ_CST);
|
|
}
|
|
# define AO_HAVE_nop_full
|
|
#endif /* !AO_UNIPROCESSOR */
|
|
|
|
#include "generic-small.h"
|
|
|
|
#ifndef AO_PREFER_GENERALIZED
|
|
# include "generic-arithm.h"
|
|
|
|
# define AO_CLEAR(addr) __atomic_clear(addr, __ATOMIC_RELEASE)
|
|
# define AO_HAVE_CLEAR
|
|
|
|
AO_INLINE AO_TS_VAL_t
|
|
AO_test_and_set(volatile AO_TS_t *addr)
|
|
{
|
|
return (AO_TS_VAL_t)__atomic_test_and_set(addr, __ATOMIC_RELAXED);
|
|
}
|
|
# define AO_HAVE_test_and_set
|
|
|
|
AO_INLINE AO_TS_VAL_t
|
|
AO_test_and_set_acquire(volatile AO_TS_t *addr)
|
|
{
|
|
return (AO_TS_VAL_t)__atomic_test_and_set(addr, __ATOMIC_ACQUIRE);
|
|
}
|
|
# define AO_HAVE_test_and_set_acquire
|
|
|
|
AO_INLINE AO_TS_VAL_t
|
|
AO_test_and_set_release(volatile AO_TS_t *addr)
|
|
{
|
|
return (AO_TS_VAL_t)__atomic_test_and_set(addr, __ATOMIC_RELEASE);
|
|
}
|
|
# define AO_HAVE_test_and_set_release
|
|
|
|
AO_INLINE AO_TS_VAL_t
|
|
AO_test_and_set_full(volatile AO_TS_t *addr)
|
|
{
|
|
return (AO_TS_VAL_t)__atomic_test_and_set(addr, __ATOMIC_SEQ_CST);
|
|
}
|
|
# define AO_HAVE_test_and_set_full
|
|
#endif /* !AO_PREFER_GENERALIZED */
|
|
|
|
#ifdef AO_HAVE_DOUBLE_PTR_STORAGE
|
|
|
|
# if ((__SIZEOF_SIZE_T__ == 4 \
|
|
&& defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8)) \
|
|
|| (__SIZEOF_SIZE_T__ == 8 /* half of AO_double_t */ \
|
|
&& defined(__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16))) \
|
|
&& !defined(AO_SKIPATOMIC_double_compare_and_swap_ANY)
|
|
# define AO_GCC_HAVE_double_SYNC_CAS
|
|
# endif
|
|
|
|
# if !defined(AO_GCC_HAVE_double_SYNC_CAS) || !defined(AO_PREFER_GENERALIZED)
|
|
|
|
# if !defined(AO_HAVE_double_load) && !defined(AO_SKIPATOMIC_double_load)
|
|
AO_INLINE AO_double_t
|
|
AO_double_load(const volatile AO_double_t *addr)
|
|
{
|
|
AO_double_t result;
|
|
|
|
result.AO_whole = __atomic_load_n(&addr->AO_whole, __ATOMIC_RELAXED);
|
|
return result;
|
|
}
|
|
# define AO_HAVE_double_load
|
|
# endif
|
|
|
|
# if !defined(AO_HAVE_double_load_acquire) \
|
|
&& !defined(AO_SKIPATOMIC_double_load_acquire)
|
|
AO_INLINE AO_double_t
|
|
AO_double_load_acquire(const volatile AO_double_t *addr)
|
|
{
|
|
AO_double_t result;
|
|
|
|
result.AO_whole = __atomic_load_n(&addr->AO_whole, __ATOMIC_ACQUIRE);
|
|
return result;
|
|
}
|
|
# define AO_HAVE_double_load_acquire
|
|
# endif
|
|
|
|
# if !defined(AO_HAVE_double_store) && !defined(AO_SKIPATOMIC_double_store)
|
|
AO_INLINE void
|
|
AO_double_store(volatile AO_double_t *addr, AO_double_t value)
|
|
{
|
|
__atomic_store_n(&addr->AO_whole, value.AO_whole, __ATOMIC_RELAXED);
|
|
}
|
|
# define AO_HAVE_double_store
|
|
# endif
|
|
|
|
# if !defined(AO_HAVE_double_store_release) \
|
|
&& !defined(AO_SKIPATOMIC_double_store_release)
|
|
AO_INLINE void
|
|
AO_double_store_release(volatile AO_double_t *addr, AO_double_t value)
|
|
{
|
|
__atomic_store_n(&addr->AO_whole, value.AO_whole, __ATOMIC_RELEASE);
|
|
}
|
|
# define AO_HAVE_double_store_release
|
|
# endif
|
|
|
|
#endif /* !AO_GCC_HAVE_double_SYNC_CAS || !AO_PREFER_GENERALIZED */
|
|
|
|
#endif /* AO_HAVE_DOUBLE_PTR_STORAGE */
|
|
|
|
#ifdef AO_GCC_HAVE_double_SYNC_CAS
|
|
# ifndef AO_HAVE_double_compare_and_swap
|
|
AO_INLINE int
|
|
AO_double_compare_and_swap(volatile AO_double_t *addr,
|
|
AO_double_t old_val, AO_double_t new_val)
|
|
{
|
|
return (int)__atomic_compare_exchange_n(&addr->AO_whole,
|
|
&old_val.AO_whole /* p_expected */,
|
|
new_val.AO_whole /* desired */,
|
|
0 /* is_weak: false */,
|
|
__ATOMIC_RELAXED /* success */,
|
|
__ATOMIC_RELAXED /* failure */);
|
|
}
|
|
# define AO_HAVE_double_compare_and_swap
|
|
# endif
|
|
|
|
# ifndef AO_HAVE_double_compare_and_swap_acquire
|
|
AO_INLINE int
|
|
AO_double_compare_and_swap_acquire(volatile AO_double_t *addr,
|
|
AO_double_t old_val,
|
|
AO_double_t new_val)
|
|
{
|
|
return (int)__atomic_compare_exchange_n(&addr->AO_whole,
|
|
&old_val.AO_whole, new_val.AO_whole, 0,
|
|
__ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);
|
|
}
|
|
# define AO_HAVE_double_compare_and_swap_acquire
|
|
# endif
|
|
|
|
# ifndef AO_HAVE_double_compare_and_swap_release
|
|
AO_INLINE int
|
|
AO_double_compare_and_swap_release(volatile AO_double_t *addr,
|
|
AO_double_t old_val,
|
|
AO_double_t new_val)
|
|
{
|
|
return (int)__atomic_compare_exchange_n(&addr->AO_whole,
|
|
&old_val.AO_whole, new_val.AO_whole, 0,
|
|
__ATOMIC_RELEASE,
|
|
__ATOMIC_RELAXED /* failure */);
|
|
}
|
|
# define AO_HAVE_double_compare_and_swap_release
|
|
# endif
|
|
|
|
# ifndef AO_HAVE_double_compare_and_swap_full
|
|
AO_INLINE int
|
|
AO_double_compare_and_swap_full(volatile AO_double_t *addr,
|
|
AO_double_t old_val, AO_double_t new_val)
|
|
{
|
|
return (int)__atomic_compare_exchange_n(&addr->AO_whole,
|
|
&old_val.AO_whole, new_val.AO_whole, 0,
|
|
__ATOMIC_ACQ_REL,
|
|
__ATOMIC_ACQUIRE /* failure */);
|
|
}
|
|
# define AO_HAVE_double_compare_and_swap_full
|
|
# endif
|
|
#endif /* AO_GCC_HAVE_double_SYNC_CAS */
|