1
0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-02 03:06:28 +02:00
FFmpeg/compat/atomics
Wan-Teh Chang 6a93b596c5 compat/atomics: add typecasts in atomic_compare_exchange_strong()
The Solaris and Windows emulations of atomic_compare_exchange_strong()
need typecasts to avoid compiler warnings, because the functions they
call expect a void* pointer but an intptr_t integer is passed.

Note that the emulations of atomic_compare_exchange_strong() (except
the gcc version) only work for atomic_intptr_t because of the type of
the second argument (|expected|). See
http://en.cppreference.com/w/c/atomic:

_Bool atomic_compare_exchange_strong( volatile A* obj,
                                      C* expected, C desired );

The types of the first argument and second argument are different
(|A| and |C|, respectively). |C| is the non-atomic type corresponding
to |A|. In the emulations of atomic_compare_exchange_strong(), |C| is
intptr_t. This implies |A| can only be sig_intptr_t.

Signed-off-by: Wan-Teh Chang <wtc@google.com>
2016-12-08 15:53:58 -05:00
..
dummy Add a compat dummy stdatomic.h used when threading is disabled 2016-10-02 18:57:56 +02:00
gcc Add a compat stdatomic.h implementation based on GCC atomics 2016-10-02 18:52:08 +02:00
pthread Add a compat stdatomic.h implementation based on pthreads 2016-10-02 18:56:52 +02:00
suncc compat/atomics: add typecasts in atomic_compare_exchange_strong() 2016-12-08 15:53:58 -05:00
win32 compat/atomics: add typecasts in atomic_compare_exchange_strong() 2016-12-08 15:53:58 -05:00