oysteikt/heimdal
0
0
Fork 0
Code Issues 5 Pull Requests Releases Activity

base: use <stdatomic.h> for atomics, where present

Browse Source 
C11 introduces a new set of atomic APIs in <stdatomic.h>. If available, use
those in preference to compiler- or platform-specific intrinsics.
This commit is contained in:
Luke Howard
2020-07-13 09:47:02 +10:00
parent 932605c01e
commit cbb2ceb018
2 changed files with 15 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
configure.ac
View File

@@ -412,6 +412,7 @@ AC_CHECK_HEADERS([\
signal.h \ signal.h \
strings.h \ strings.h \
stropts.h \ stropts.h \
stdatomic.h \
sys/bitypes.h \ sys/bitypes.h \
sys/category.h \ sys/category.h \
sys/file.h \ sys/file.h \

15
lib/base/heimbase-atomics.h
View File

@@ -42,7 +42,20 @@
* Atomic operations * Atomic operations
*/ */
#if defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH) #if defined(HAVE_STDATOMIC_H)
#include <stdatomic.h>
#define heim_base_atomic_inc(x) (atomic_fetch_add((x), 1) + 1)
#define heim_base_atomic_dec(x) (atomic_fetch_sub((x), 1) - 1)
#define heim_base_atomic_type atomic_uint
#define heim_base_atomic_max UINT_MAX
#define heim_base_exchange_pointer(t,v) atomic_exchange((t), (v))
#define heim_base_exchange_32(t,v) atomic_exchange((t), (v))
#define heim_base_exchange_64(t,v) atomic_exchange((t), (v))
#elif defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH)
#define heim_base_atomic_inc(x) __sync_add_and_fetch((x), 1) #define heim_base_atomic_inc(x) __sync_add_and_fetch((x), 1)
#define heim_base_atomic_dec(x) __sync_sub_and_fetch((x), 1) #define heim_base_atomic_dec(x) __sync_sub_and_fetch((x), 1)