From 7f02511e5b8879430e2b3c51601341d3c0314071 Mon Sep 17 00:00:00 2001 From: Sergey Bugaev Date: Sat, 23 Mar 2024 20:32:42 +0300 Subject: hurd: Move internal functions to internal header Move _hurd_self_sigstate (), _hurd_critical_section_lock (), and _hurd_critical_section_unlock () inline implementations (that were already guarded by #if defined _LIBC) to the internal version of the header. While at it, add to the includes, and use __LIBC_NO_TLS () unconditionally. Signed-off-by: Sergey Bugaev Message-ID: <20240323173301.151066-2-bugaevc@gmail.com> --- sysdeps/hurd/include/hurd/signal.h | 78 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) (limited to 'sysdeps') diff --git a/sysdeps/hurd/include/hurd/signal.h b/sysdeps/hurd/include/hurd/signal.h index 1dc8a1f353..fab8d1b67c 100644 --- a/sysdeps/hurd/include/hurd/signal.h +++ b/sysdeps/hurd/include/hurd/signal.h @@ -9,6 +9,84 @@ libc_hidden_proto (_hurd_self_sigstate) #include_next #ifndef _ISOMAC + +#if defined __USE_EXTERN_INLINES +# if IS_IN (libc) || IS_IN (libpthread) +# include +# include +# endif +#endif + +#ifndef _HURD_SIGNAL_H_EXTERN_INLINE +#define _HURD_SIGNAL_H_EXTERN_INLINE __extern_inline +#endif + +#if defined __USE_EXTERN_INLINES && IS_IN (libc) +_HURD_SIGNAL_H_EXTERN_INLINE struct hurd_sigstate * +_hurd_self_sigstate (void) +{ + struct hurd_sigstate *ss = THREAD_GETMEM (THREAD_SELF, _hurd_sigstate); + if (__glibc_unlikely (ss == NULL)) + { + thread_t self = __mach_thread_self (); + + /* The thread variable is unset; this must be the first time we've + asked for it. In this case, the critical section flag cannot + possible already be set. Look up our sigstate structure the slow + way. */ + ss = _hurd_thread_sigstate (self); + THREAD_SETMEM (THREAD_SELF, _hurd_sigstate, ss); + __mach_port_deallocate (__mach_task_self (), self); + } + return ss; +} + +_HURD_SIGNAL_H_EXTERN_INLINE void * +_hurd_critical_section_lock (void) +{ + struct hurd_sigstate *ss; + + if (__LIBC_NO_TLS ()) + /* TLS is currently initializing, no need to enter critical section. */ + return NULL; + + ss = _hurd_self_sigstate (); + + if (! __spin_try_lock (&ss->critical_section_lock)) + /* We are already in a critical section, so do nothing. */ + return NULL; + + /* With the critical section lock held no signal handler will run. + Return our sigstate pointer; this will be passed to + _hurd_critical_section_unlock to unlock it. */ + return ss; +} + +_HURD_SIGNAL_H_EXTERN_INLINE void +_hurd_critical_section_unlock (void *our_lock) +{ + if (our_lock == NULL) + /* The critical section lock was held when we began. Do nothing. */ + return; + else + { + /* It was us who acquired the critical section lock. Unlock it. */ + struct hurd_sigstate *ss = (struct hurd_sigstate *) our_lock; + sigset_t pending; + _hurd_sigstate_lock (ss); + __spin_unlock (&ss->critical_section_lock); + pending = _hurd_sigstate_pending (ss) & ~ss->blocked; + _hurd_sigstate_unlock (ss); + if (__glibc_unlikely (!__sigisemptyset (&pending))) + /* There are unblocked signals pending, which weren't + delivered because we were in the critical section. + Tell the signal thread to deliver them now. */ + __msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ()); + } +} +#endif /* defined __USE_EXTERN_INLINES && IS_IN (libc) */ + + libc_hidden_proto (_hurd_exception2signal) libc_hidden_proto (_hurd_intr_rpc_mach_msg) libc_hidden_proto (_hurd_thread_sigstate) -- cgit 1.4.1