Skip to content
GitLab
Projects
Groups
Snippets
/
Help
Help
Support
Community forum
Keyboard shortcuts
?
Submit feedback
Sign in
Toggle navigation
Menu
Open sidebar
Steve Lhomme
VLC
Commits
8fec5772
Commit
8fec5772
authored
Nov 11, 2012
by
Rémi Denis-Courmont
Browse files
Fix mutex-emulated atomic operations on GCC
parent
6c62d747
Changes
1
Hide whitespace changes
Inline
Side-by-side
include/vlc_atomic.h
View file @
8fec5772
...
...
@@ -32,9 +32,7 @@
/*** Native C11 atomics ***/
# include <stdatomic.h>
# elif defined (__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4) || (defined (__clang__) && (defined (__x86_64__) || defined (__i386__)))
/*** Intel/GCC atomics ***/
# else
# define ATOMIC_FLAG_INIT false
...
...
@@ -98,6 +96,10 @@ typedef ptrdiff_t atomic_ptrdiff_t;
typedef
intmax_t
atomic_intmax_t
;
typedef
uintmax_t
atomic_uintmax_t
;
# if defined (__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4) || (defined (__clang__) && (defined (__x86_64__) || defined (__i386__)))
/*** Intel/GCC atomics ***/
# define atomic_store(object,desired) \
do { \
*(object) = (desired); \
...
...
@@ -188,196 +190,103 @@ typedef uintmax_t atomic_uintmax_t;
# define atomic_flag_clear_explicit(object,order) \
atomic_flag_clear(object)
# el
se
# el
if defined (__GNUC__)
/*** No atomics ***/
# define ATOMIC_FLAG_INIT false
# define ATOMIC_VAR_INIT(value) (value)
# define atomic_init(obj, value) \
do { *(obj) = (value); } while(0)
# define kill_dependency(y) \
((void)0)
# define atomic_thread_fence(order) \
__sync_synchronize()
# define atomic_signal_fence(order) \
((void)0)
# define atomic_is_lock_free(obj) \
false
typedef
uintptr_t
atomic_generic_t
;
typedef
atomic_generic_t
atomic_flag
;
typedef
atomic_generic_t
atomic_bool
;
//typedef atomic_generic_t atomic_char;
//typedef atomic_generic_t atomic_schar;
typedef
atomic_generic_t
atomic_uchar
;
//typedef atomic_generic_t atomic_short;
typedef
atomic_generic_t
atomic_ushort
;
//typedef atomic_generic_t atomic_int;
typedef
atomic_generic_t
atomic_uint
;
//typedef atomic_generic_t atomic_long;
typedef
atomic_generic_t
atomic_ulong
;
//typedef atomic_generic_t atomic_llong;
//typedef atomic_generic_t atomic_ullong;
//typedef atomic_generic_t atomic_char16_t;
//typedef atomic_generic_t atomic_char32_t;
//typedef atomic_generic_t atomic_wchar_t;
//typedef atomic_generic_t atomic_int_least8_t;
typedef
atomic_generic_t
atomic_uint_least8_t
;
//typedef atomic_generic_t atomic_int_least16_t;
typedef
atomic_generic_t
atomic_uint_least16_t
;
//typedef atomic_generic_t atomic_int_least32_t;
typedef
atomic_generic_t
atomic_uint_least32_t
;
//typedef atomic_generic_t atomic_int_least64_t;
//typedef atomic_generic_t atomic_uint_least64_t;
//typedef atomic_generic_t atomic_int_fast8_t;
typedef
atomic_generic_t
atomic_uint_fast8_t
;
//typedef atomic_generic_t atomic_int_fast16_t;
typedef
atomic_generic_t
atomic_uint_fast16_t
;
//typedef atomic_generic_t atomic_int_fast32_t;
typedef
atomic_generic_t
atomic_uint_fast32_t
;
//typedef atomic_generic_t atomic_int_fast64_t
//typedef atomic_generic_t atomic_uint_fast64_t;
//typedef atomic_generic_t atomic_intptr_t;
typedef
atomic_generic_t
atomic_uintptr_t
;
typedef
atomic_generic_t
atomic_size_t
;
//typedef atomic_generic_t atomic_ptrdiff_t;
//typedef atomic_generic_t atomic_intmax_t;
//typedef atomic_generic_t atomic_uintmax_t;
#define atomic_store(object,desired) \
# define atomic_store(object,desired) \
do { \
typeof (object) _obj = (object); \
typeof (*object) _des = (desired); \
vlc_global_lock(VLC_ATOMIC_MUTEX); \
*
(
obj
ect)
=
(
des
ired)
; \
*
_
obj =
_
des; \
vlc_global_unlock(VLC_ATOMIC_MUTEX); \
} while (0)
# define atomic_store_explicit(object,desired,order) \
atomic_store(object,desired)
static
inline
uintptr_t
atomic_load
(
atomic_generic_t
*
object
)
{
uintptr_t
value
;
vlc_global_lock
(
VLC_ATOMIC_MUTEX
);
value
=
*
obj
ect
;
vlc_global_unlock
(
VLC_ATOMIC_MUTEX
);
return
value
;
}
# define atomic_load(
object)
\
({ \
typeof (object) _obj = (object); \
typeof (*object) _old; \
vlc_global_lock(VLC_ATOMIC_MUTEX);
\
_old
= *
_
obj
; \
vlc_global_unlock(VLC_ATOMIC_MUTEX);
\
_old; \
}
)
# define atomic_load_explicit(object,order) \
atomic_load(object)
static
inline
uintptr_t
atomic_exchange
(
atomic_generic_t
*
object
,
uintptr_t
desired
)
{
uintptr_t
value
;
vlc_global_lock
(
VLC_ATOMIC_MUTEX
);
value
=
*
obj
ect
;
*
obj
ect
=
des
ired
;
vlc_global_unlock
(
VLC_ATOMIC_MUTEX
);
return
value
;
}
# define atomic_exchange(object,desired) \
({ \
typeof (object) _obj = (object); \
typeof (*object) _des = (desired); \
typeof (*object) _old; \
vlc_global_lock(VLC_ATOMIC_MUTEX);
\
_old
= *
_
obj
; \
*
_
obj =
_
des
; \
vlc_global_unlock(VLC_ATOMIC_MUTEX);
\
_old; \
}
)
# define atomic_exchange_explicit(object,desired,order) \
atomic_exchange(object,desired)
static
inline
bool
vlc_atomic_compare_exchange
(
atomic_generic_t
*
object
,
uintptr_t
*
expected
,
uintptr_t
desired
)
{
bool
ret
;
vlc_global_lock
(
VLC_ATOMIC_MUTEX
);
ret
=
*
object
==
*
expected
;
if
(
ret
)
*
object
=
desired
;
else
*
expected
=
*
object
;
vlc_global_unlock
(
VLC_ATOMIC_MUTEX
);
return
ret
;
}
# define atomic_compare_exchange_strong(object,expected,desired) \
vlc_atomic_compare_exchange(object, expected, desired)
({ \
typeof (object) _obj = (object); \
typeof (object) _exp = (expected); \
typeof (*object) _des = (desired); \
bool ret; \
vlc_global_lock(VLC_ATOMIC_MUTEX); \
ret = *_obj == *_exp; \
if (ret) \
*_obj = _des; \
else \
*_exp = *_obj; \
vlc_global_unlock(VLC_ATOMIC_MUTEX); \
ret; \
})
# define atomic_compare_exchange_strong_explicit(object,expected,desired,order) \
atomic_compare_exchange_strong(object, expected, desired)
# define atomic_compare_exchange_weak(object,expected,desired) \
vlc_
atomic_compare_exchange(object, expected, desired)
atomic_compare_exchange
_strong
(object, expected, desired)
# define atomic_compare_exchange_weak_explicit(object,expected,desired,order) \
atomic_compare_exchange_weak(object, expected, desired)
static
inline
uintmax_t
atomic_fetch_add
(
atomic_generic_t
*
object
,
uintptr_t
operand
)
{
uintptr_t
value
;
# define atomic_fetch_OP(object,desired,op) \
({ \
typeof (object) _obj = (object); \
typeof (*object) _des = (desired); \
typeof (*object) _old; \
vlc_global_lock(VLC_ATOMIC_MUTEX); \
_old = *_obj; \
*_obj = (*_obj) op (_des); \
vlc_global_unlock(VLC_ATOMIC_MUTEX); \
_old; \
})
vlc_global_lock
(
VLC_ATOMIC_MUTEX
);
value
=
*
object
;
*
object
+=
operand
;
vlc_global_unlock
(
VLC_ATOMIC_MUTEX
);
return
value
;
}
# define atomic_fetch_add(object,operand) \
atomic_fetch_OP(object,operand,+)
# define atomic_fetch_add_explicit(object,operand,order) \
atomic_fetch_add(object,operand)
static
inline
uintptr_t
atomic_fetch_sub
(
atomic_generic_t
*
object
,
uintptr_t
operand
)
{
uintptr_t
value
;
vlc_global_lock
(
VLC_ATOMIC_MUTEX
);
value
=
*
object
;
*
object
-=
operand
;
vlc_global_unlock
(
VLC_ATOMIC_MUTEX
);
return
value
;
}
# define atomic_fetch_sub(object,operand) \
atomic_fetch_OP(object,operand,-)
# define atomic_fetch_sub_explicit(object,operand,order) \
atomic_fetch_sub(object,operand)
static
inline
uintptr_t
atomic_fetch_or
(
atomic_generic_t
*
object
,
uintptr_t
operand
)
{
uintptr_t
value
;
vlc_global_lock
(
VLC_ATOMIC_MUTEX
);
value
=
*
object
;
*
object
|=
operand
;
vlc_global_unlock
(
VLC_ATOMIC_MUTEX
);
return
value
;
}
# define atomic_fetch_or(object,operand) \
atomic_fetch_OP(object,operand,|)
# define atomic_fetch_or_explicit(object,operand,order) \
atomic_fetch_or(object,operand)
static
inline
uintptr_t
atomic_fetch_xor
(
atomic_generic_t
*
object
,
uintptr_t
operand
)
{
uintptr_t
value
;
vlc_global_lock
(
VLC_ATOMIC_MUTEX
);
value
=
*
object
;
*
object
^=
operand
;
vlc_global_unlock
(
VLC_ATOMIC_MUTEX
);
return
value
;
}
# define atomic_fetch_xor(object,operand) \
atomic_fetch_OP(object,operand,^)
# define atomic_fetch_xor_explicit(object,operand,order) \
atomic_fetch_sub(object,operand)
static
inline
uintptr_t
atomic_fetch_and
(
atomic_generic_t
*
object
,
uintptr_t
operand
)
{
uintptr_t
value
;
vlc_global_lock
(
VLC_ATOMIC_MUTEX
);
value
=
*
object
;
*
object
&=
operand
;
vlc_global_unlock
(
VLC_ATOMIC_MUTEX
);
return
value
;
}
# define atomic_fetch_and(object,operand) \
atomic_fetch_OP(object,operand,&)
# define atomic_fetch_and_explicit(object,operand,order) \
atomic_fetch_and(object,operand)
...
...
@@ -393,6 +302,9 @@ uintptr_t atomic_fetch_and(atomic_generic_t *object, uintptr_t operand)
# define atomic_flag_clear_explicit(object,order) \
atomic_flag_clear(object)
# else
# error FIXME: implement atomic operations for this compiler.
# endif
# endif
/**
...
...
Write
Preview
Supports
Markdown
0%
Try again
or
attach a new file
.
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment