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authorSteve Vinoski <[email protected]>2014-03-19 11:45:11 -0400
committerSteve Vinoski <[email protected]>2014-03-21 10:19:51 -0400
commit6c298a7bfa332e5b7d153648d741740abc3bcdf8 (patch)
tree3f8a5604555b8a3b959c5184bba59d9c65b0da3a /lib/stdlib/test/array_SUITE.erl
parent73af231f1a22083031df49ba19fdfd4f6b434a10 (diff)
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fix sys:get_state/1,2 and sys:replace_state/2,3 when sys suspended
Add two new system callbacks Module:system_get_state/1 and Module:system_replace_state/2 to allow sys:get_state/1,2 and sys:replace_state/2,3 to operate correctly even if a process is sys suspended. Modify gen_server, gen_fsm, and gen_event to support the new callbacks. If a callback module does not export these functions, then by default the Misc value (the same as that passed as the final argument to sys:handle_system_msg/6, and returned as part of the return value of sys:get_status/1,2) is treated as the callback module's state. The previous behaviour of intercepting the system message and passing a tuple of size 2 as the last argument to sys:handle_system_msg/6 is no longer supported. Add tests to verify the correctness of sys:get_state/1,2 and sys:replace_state/2,3 when processes are sys suspended. Add two tests for modules that implement special processes, one that exports system_get_state/1 and system_replace_state/2 and one that doesn't. Much of the credit for this patch goes to James Fish, who reported the initial problem and implemented much of the fix.
Diffstat (limited to 'lib/stdlib/test/array_SUITE.erl')
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