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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 <tls.h> to the includes, and use __LIBC_NO_TLS () unconditionally. Signed-off-by: Sergey Bugaev <bugaevc@gmail.com> Message-ID: <20240323173301.151066-2-bugaevc@gmail.com>
This commit is contained in:
Sergey Bugaev
Samuel Thibault
parent
4a13b3ef46
commit
7f02511e5b
@ -40,11 +40,6 @@
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#include <setjmp.h> /* For `jmp_buf'. */
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#include <spin-lock.h>
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struct hurd_signal_preemptor; /* <hurd/sigpreempt.h> */
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#if defined __USE_EXTERN_INLINES && defined _LIBC
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# if IS_IN (libc) || IS_IN (libpthread)
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# include <sigsetops.h>
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# endif
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#endif
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/* Full details of a signal. */
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@ -157,33 +152,6 @@ extern void _hurd_sigstate_unlock (struct hurd_sigstate *ss);
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/* Used by libpthread to remove stale sigstate structures. */
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extern void _hurd_sigstate_delete (thread_t thread);
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#ifndef _HURD_SIGNAL_H_EXTERN_INLINE
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#define _HURD_SIGNAL_H_EXTERN_INLINE __extern_inline
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#endif
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#if defined __USE_EXTERN_INLINES && defined _LIBC
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# if IS_IN (libc)
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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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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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/* The thread variable is unset; this must be the first time we've
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asked for it. In this case, the critical section flag cannot
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possible already be set. Look up our sigstate structure the slow
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way. */
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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 ss;
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}
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# endif
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#endif
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struct machine_thread_all_state;
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extern mach_port_t
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_hurdsig_abort_rpcs (struct hurd_sigstate *ss, int signo, int sigthread,
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@ -215,63 +183,8 @@ extern int _hurd_core_limit;
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avoid unexpectingly exposing EINTR to the application. */
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extern void *_hurd_critical_section_lock (void);
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#if defined __USE_EXTERN_INLINES && defined _LIBC
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# if IS_IN (libc)
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_HURD_SIGNAL_H_EXTERN_INLINE void *
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_hurd_critical_section_lock (void)
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{
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struct hurd_sigstate *ss;
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#ifdef __LIBC_NO_TLS
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if (__LIBC_NO_TLS ())
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/* TLS is currently initializing, no need to enter critical section. */
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return NULL;
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#endif
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ss = _hurd_self_sigstate ();
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if (! __spin_try_lock (&ss->critical_section_lock))
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/* We are already in a critical section, so do nothing. */
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return NULL;
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/* With the critical section lock held no signal handler will run.
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Return our sigstate pointer; this will be passed to
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_hurd_critical_section_unlock to unlock it. */
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return ss;
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}
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# endif
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#endif
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extern void _hurd_critical_section_unlock (void *our_lock);
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#if defined __USE_EXTERN_INLINES && defined _LIBC
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# if IS_IN (libc)
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_HURD_SIGNAL_H_EXTERN_INLINE void
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_hurd_critical_section_unlock (void *our_lock)
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{
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if (our_lock == NULL)
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/* The critical section lock was held when we began. Do nothing. */
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return;
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else
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{
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/* It was us who acquired the critical section lock. Unlock it. */
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struct hurd_sigstate *ss = (struct hurd_sigstate *) our_lock;
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sigset_t pending;
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_hurd_sigstate_lock (ss);
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__spin_unlock (&ss->critical_section_lock);
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pending = _hurd_sigstate_pending (ss) & ~ss->blocked;
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_hurd_sigstate_unlock (ss);
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if (__glibc_unlikely (!__sigisemptyset (&pending)))
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/* There are unblocked signals pending, which weren't
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delivered because we were in the critical section.
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Tell the signal thread to deliver them now. */
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__msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ());
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}
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}
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# endif
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#endif
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/* Convenient macros for simple uses of critical sections.
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These two must be used as a pair at the same C scoping level. */
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@ -9,6 +9,84 @@ libc_hidden_proto (_hurd_self_sigstate)
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#include_next <hurd/signal.h>
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#ifndef _ISOMAC
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#if defined __USE_EXTERN_INLINES
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# if IS_IN (libc) || IS_IN (libpthread)
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# include <sigsetops.h>
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# include <tls.h>
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# endif
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#endif
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#ifndef _HURD_SIGNAL_H_EXTERN_INLINE
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#define _HURD_SIGNAL_H_EXTERN_INLINE __extern_inline
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#endif
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#if defined __USE_EXTERN_INLINES && IS_IN (libc)
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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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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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/* The thread variable is unset; this must be the first time we've
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asked for it. In this case, the critical section flag cannot
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possible already be set. Look up our sigstate structure the slow
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way. */
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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 ss;
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}
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_HURD_SIGNAL_H_EXTERN_INLINE void *
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_hurd_critical_section_lock (void)
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{
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struct hurd_sigstate *ss;
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if (__LIBC_NO_TLS ())
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/* TLS is currently initializing, no need to enter critical section. */
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return NULL;
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ss = _hurd_self_sigstate ();
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if (! __spin_try_lock (&ss->critical_section_lock))
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/* We are already in a critical section, so do nothing. */
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return NULL;
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/* With the critical section lock held no signal handler will run.
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Return our sigstate pointer; this will be passed to
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_hurd_critical_section_unlock to unlock it. */
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return ss;
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}
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_HURD_SIGNAL_H_EXTERN_INLINE void
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_hurd_critical_section_unlock (void *our_lock)
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{
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if (our_lock == NULL)
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/* The critical section lock was held when we began. Do nothing. */
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return;
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else
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{
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/* It was us who acquired the critical section lock. Unlock it. */
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struct hurd_sigstate *ss = (struct hurd_sigstate *) our_lock;
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sigset_t pending;
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_hurd_sigstate_lock (ss);
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__spin_unlock (&ss->critical_section_lock);
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pending = _hurd_sigstate_pending (ss) & ~ss->blocked;
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_hurd_sigstate_unlock (ss);
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if (__glibc_unlikely (!__sigisemptyset (&pending)))
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/* There are unblocked signals pending, which weren't
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delivered because we were in the critical section.
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Tell the signal thread to deliver them now. */
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__msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ());
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}
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}
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#endif /* defined __USE_EXTERN_INLINES && IS_IN (libc) */
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libc_hidden_proto (_hurd_exception2signal)
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libc_hidden_proto (_hurd_intr_rpc_mach_msg)
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libc_hidden_proto (_hurd_thread_sigstate)
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