Are there atomics support in crossbridge?

[vladkolotvin]

Are there atomics support in crossbridge? For example GCC's built-in function "__sync_val_compare_and_swap"?

[mbolt35]

Yes, support for the GNU atomic built-ins is "kind of" there. After I read this page: Multithreaded C Programming with the Adobe Flash C Compiler, I assumed that support was included for all of the built-ins mentioned here: Atomic Built-Ins

However, after some testing, __sync_val_compare_and_swap currently only supports 32-bit values. So, for example, __sync_bool_compare_and_swap will give you a nice error message:

"FlasCC does not support CAS on a non-32bit values..."

Other than the compare and swaps, all of the __sync_fetch_and_<action> and __sync_<action>_and_fetch implementations seem to be implemented and working correctly. Hope this helps.

[cbakgly]

Correct. Because flash vm is 32bit only. Besides check out posix/libcHack.cpp for atomic ops.

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ÔÚ 2013-9-7£¬7:49£¬Matt Bolt notifications@github.com дµÀ£º

Yes, support for the GNU atomic built-ins is "kind of" there. After I read this page: Multithreaded C Programming with the Adobe Flash C Compiler, I assumed that support was included for all of the built-ins mentioned here: Atomic Built-Ins

However, after some testing, sync_val_compare_and_swap currently only supports 32-bit values. So, for example, sync_bool_compare_and_swap will give you a nice error message:

"FlasCC does not support CAS on a non-32bit values..." Other than the compare and swaps, all of the __sync_fetchand and _sync_and_fetch implementations seem to be implemented and working correctly. Hope this helps.

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