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hurd: Microoptimize _hurd_self_sigstate ()
When THREAD_GETMEM is defined with inline assembly, the compiler may not optimize away the two reads of _hurd_sigstate. Help it out a little bit by only reading it once. This also makes for a slightly cleaner code. Signed-off-by: Sergey Bugaev <bugaevc@gmail.com> Message-Id: <20230319151017.531737-32-bugaevc@gmail.com>
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@ -166,13 +166,15 @@ extern void _hurd_sigstate_delete (thread_t thread);
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_HURD_SIGNAL_H_EXTERN_INLINE struct hurd_sigstate *
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_hurd_self_sigstate (void)
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{
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if (THREAD_GETMEM (THREAD_SELF, _hurd_sigstate) == NULL)
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struct hurd_sigstate *ss = THREAD_GETMEM (THREAD_SELF, _hurd_sigstate);
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if (__glibc_unlikely (ss == NULL))
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{
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thread_t self = __mach_thread_self ();
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THREAD_SETMEM (THREAD_SELF, _hurd_sigstate, _hurd_thread_sigstate (self));
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ss = _hurd_thread_sigstate (self);
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THREAD_SETMEM (THREAD_SELF, _hurd_sigstate, ss);
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__mach_port_deallocate (__mach_task_self (), self);
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}
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return THREAD_GETMEM (THREAD_SELF, _hurd_sigstate);
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return ss;
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}
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# endif
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#endif
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