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fc_atomic.h: add FC_ATOMIC_SET

storage_pool
YuQing 2021-01-11 16:22:07 +08:00
parent 3b2b9d6176
commit 1f126476bc
3 changed files with 16 additions and 1 deletions
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3
HISTORY
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@ -1,4 +1,7 @@
Version 1.47 2021-01-11
* fc_atomic.h: add FC_ATOMIC_SET
Version 1.46 2020-12-29 Version 1.46 2020-12-29
* add function get_time_item_from_conf_ex * add function get_time_item_from_conf_ex
* INI_FIND_ITEM just break instead of return * INI_FIND_ITEM just break instead of return

2
libfastcommon.spec
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@ -62,5 +62,5 @@ rm -rf %{buildroot}
/usr/include/fastcommon/* /usr/include/fastcommon/*
%changelog %changelog
* Mon Jun 23 2014 Zaixue Liao <liaozaixue@yongche.com> * Mon Jun 23 2014 Zaixue Liao
- first RPM release (1.0) - first RPM release (1.0)

12
src/fc_atomic.h
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@ -28,6 +28,18 @@ extern "C" {
old_value = __sync_add_and_fetch(&var, 0); \ old_value = __sync_add_and_fetch(&var, 0); \
} while (new_value != old_value) } while (new_value != old_value)
#define FC_ATOMIC_SET(var, new_value) \
do { \
typeof(var) _old_value; \
_old_value = var; \
do { \
if (__sync_bool_compare_and_swap(&var, _old_value, new_value)) { \
break; \
} \
_old_value = __sync_add_and_fetch(&var, 0); \
} while (new_value != _old_value); \
} while (0)
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif