ports-get ports-set hurdports hurdmsg \
errno-loc \
sysvshm \
+ hurdlock \
$(sig) $(dtable) $(inlines) port-cleanup report-wait xattr
sig = hurdsig hurdfault siginfo hurd-raise preempt-sig \
trampoline longjmp-ts catch-exc exc2signal hurdkill sigunwind \
cthread_keycreate; cthread_getspecific; cthread_setspecific;
__libc_getspecific;
}
+
+ GLIBC_PRIVATE {
+ # Used by other libs.
+ __lll_abstimed_wait; __lll_abstimed_xwait;
+ __lll_abstimed_lock; __lll_robust_lock;
+ __lll_robust_abstimed_lock; __lll_robust_trylock;
+ __lll_robust_unlock;
+ }
}
--- /dev/null
+/* Copyright (C) 1999-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "hurdlock.h"
+#include <hurd.h>
+#include <time.h>
+#include <errno.h>
+
+/* Convert an absolute timeout in nanoseconds to a relative
+ * timeout in milliseconds. */
+static inline int __attribute__ ((gnu_inline))
+compute_reltime (const struct timespec *abstime, clockid_t clk)
+{
+ struct timespec ts;
+ __clock_gettime (clk, &ts);
+
+ ts.tv_sec = abstime->tv_sec - ts.tv_sec;
+ ts.tv_nsec = abstime->tv_nsec - ts.tv_nsec;
+
+ if (ts.tv_nsec < 0)
+ {
+ --ts.tv_sec;
+ ts.tv_nsec += 1000000000;
+ }
+
+ return (ts.tv_sec < 0 ? -1 :
+ (int)(ts.tv_sec * 1000 + ts.tv_nsec / 1000000));
+}
+
+int __lll_abstimed_wait (void *ptr, int val,
+ const struct timespec *tsp, int flags, int clk)
+{
+ int mlsec = compute_reltime (tsp, clk);
+ return (mlsec < 0 ? KERN_TIMEDOUT :
+ lll_timed_wait (ptr, val, mlsec, flags));
+}
+
+int __lll_abstimed_xwait (void *ptr, int lo, int hi,
+ const struct timespec *tsp, int flags, int clk)
+{
+ int mlsec = compute_reltime (tsp, clk);
+ return (mlsec < 0 ? KERN_TIMEDOUT :
+ lll_timed_xwait (ptr, lo, hi, mlsec, flags));
+}
+
+int __lll_abstimed_lock (void *ptr,
+ const struct timespec *tsp, int flags, int clk)
+{
+ if (lll_trylock (ptr) == 0)
+ return (0);
+
+ while (1)
+ {
+ if (atomic_exchange_acq ((int *)ptr, 2) == 0)
+ return (0);
+ else if (tsp->tv_nsec < 0 || tsp->tv_nsec >= 1000000000)
+ return (EINVAL);
+
+ int mlsec = compute_reltime (tsp, clk);
+ if (mlsec < 0 || lll_timed_wait (ptr,
+ 2, mlsec, flags) == KERN_TIMEDOUT)
+ return (ETIMEDOUT);
+ }
+}
+
+/* Robust locks. */
+
+extern int __getpid (void) __attribute__ ((const));
+extern task_t __pid2task (int);
+
+/* Test if a given process id is still valid. */
+static inline int valid_pid (int pid)
+{
+ task_t task = __pid2task (pid);
+ if (task == MACH_PORT_NULL)
+ return (0);
+
+ __mach_port_deallocate (__mach_task_self (), task);
+ return (1);
+}
+
+/* Robust locks have currently no support from the kernel; they
+ * are simply implemented with periodic polling. When sleeping, the
+ * maximum blocking time is determined by this constant. */
+#define MAX_WAIT_TIME 1500
+
+int __lll_robust_lock (void *ptr, int flags)
+{
+ int *iptr = (int *)ptr;
+ int id = __getpid ();
+ int wait_time = 25;
+ unsigned int val;
+
+ /* Try to set the lock word to our PID if it's clear. Otherwise,
+ * mark it as having waiters. */
+ while (1)
+ {
+ val = *iptr;
+ if (!val && atomic_compare_and_exchange_bool_acq (iptr, id, 0) == 0)
+ return (0);
+ else if (atomic_compare_and_exchange_bool_acq (iptr,
+ val | LLL_WAITERS, val) == 0)
+ break;
+ }
+
+ for (id |= LLL_WAITERS ; ; )
+ {
+ val = *iptr;
+ if (!val && atomic_compare_and_exchange_bool_acq (iptr, id, 0) == 0)
+ return (0);
+ else if (val && !valid_pid (val & LLL_OWNER_MASK))
+ {
+ if (atomic_compare_and_exchange_bool_acq (iptr, id, val) == 0)
+ return (EOWNERDEAD);
+ }
+ else
+ {
+ lll_timed_wait (iptr, val, wait_time, flags);
+ if (wait_time < MAX_WAIT_TIME)
+ wait_time <<= 1;
+ }
+ }
+}
+
+int __lll_robust_abstimed_lock (void *ptr,
+ const struct timespec *tsp, int flags, int clk)
+{
+ int *iptr = (int *)ptr;
+ int id = __getpid ();
+ int wait_time = 25;
+ unsigned int val;
+
+ while (1)
+ {
+ val = *iptr;
+ if (!val && atomic_compare_and_exchange_bool_acq (iptr, id, 0) == 0)
+ return (0);
+ else if (atomic_compare_and_exchange_bool_acq (iptr,
+ val | LLL_WAITERS, val) == 0)
+ break;
+ }
+
+ for (id |= LLL_WAITERS ; ; )
+ {
+ val = *iptr;
+ if (!val && atomic_compare_and_exchange_bool_acq (iptr, id, 0) == 0)
+ return (0);
+ else if (val && !valid_pid (val & LLL_OWNER_MASK))
+ {
+ if (atomic_compare_and_exchange_bool_acq (iptr, id, val) == 0)
+ return (EOWNERDEAD);
+ }
+ else
+ {
+ int mlsec = compute_reltime (tsp, clk);
+ if (mlsec < 0)
+ return (ETIMEDOUT);
+ else if (mlsec > wait_time)
+ mlsec = wait_time;
+
+ int res = lll_timed_wait (iptr, val, mlsec, flags);
+ if (res == KERN_TIMEDOUT)
+ return (ETIMEDOUT);
+ else if (wait_time < MAX_WAIT_TIME)
+ wait_time <<= 1;
+ }
+ }
+}
+
+int __lll_robust_trylock (void *ptr)
+{
+ int *iptr = (int *)ptr;
+ int id = __getpid ();
+ unsigned int val = *iptr;
+
+ if (!val)
+ {
+ if (atomic_compare_and_exchange_bool_acq (iptr, id, 0) == 0)
+ return (0);
+ }
+ else if (!valid_pid (val & LLL_OWNER_MASK) &&
+ atomic_compare_and_exchange_bool_acq (iptr, id, val) == 0)
+ return (EOWNERDEAD);
+
+ return (EBUSY);
+}
+
+void __lll_robust_unlock (void *ptr, int flags)
+{
+ unsigned int val = atomic_load_relaxed((unsigned int *)ptr);
+ while (1)
+ {
+ if (val & LLL_WAITERS)
+ {
+ lll_set_wake (ptr, 0, flags);
+ break;
+ }
+ else if (atomic_compare_exchange_weak_release ((unsigned int *)ptr, &val, 0))
+ break;
+ }
+}
+
--- /dev/null
+/* Copyright (C) 1999-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _HURD_LOCK_H
+#define _HURD_LOCK_H 1
+
+#include <mach/lowlevellock.h>
+
+struct timespec;
+
+/* Flags for robust locks. */
+#define LLL_WAITERS (1U << 31)
+#define LLL_DEAD_OWNER (1U << 30)
+
+#define LLL_OWNER_MASK ~(LLL_WAITERS | LLL_DEAD_OWNER)
+
+/* Wait on 64-bit address PTR, without blocking if its contents
+ * are different from the pair <LO, HI>. */
+#define lll_xwait(ptr, lo, hi, flags) \
+ __gsync_wait (__mach_task_self (), \
+ (vm_offset_t)ptr, lo, hi, 0, flags | GSYNC_QUAD)
+
+/* Same as 'lll_wait', but only block for MLSEC milliseconds. */
+#define lll_timed_wait(ptr, val, mlsec, flags) \
+ __gsync_wait (__mach_task_self (), \
+ (vm_offset_t)ptr, val, 0, mlsec, flags | GSYNC_TIMED)
+
+/* Same as 'lll_xwait', but only block for MLSEC milliseconds. */
+#define lll_timed_xwait(ptr, lo, hi, mlsec, flags) \
+ __gsync_wait (__mach_task_self (), (vm_offset_t)ptr, \
+ lo, hi, mlsec, flags | GSYNC_TIMED | GSYNC_QUAD)
+
+/* Same as 'lll_wait', but only block until TSP elapses,
+ * using clock CLK. */
+extern int __lll_abstimed_wait (void *__ptr, int __val,
+ const struct timespec *__tsp, int __flags, int __clk);
+
+/* Same as 'lll_xwait', but only block until TSP elapses,
+ * using clock CLK. */
+extern int __lll_abstimed_xwait (void *__ptr, int __lo, int __hi,
+ const struct timespec *__tsp, int __flags, int __clk);
+
+/* Same as 'lll_lock', but return with an error if TSP elapses,
+ * using clock CLK. */
+extern int __lll_abstimed_lock (void *__ptr,
+ const struct timespec *__tsp, int __flags, int __clk);
+
+/* Acquire the lock at PTR, but return with an error if
+ * the process containing the owner thread dies. */
+extern int __lll_robust_lock (void *__ptr, int __flags);
+
+/* Same as '__lll_robust_lock', but only block until TSP
+ * elapses, using clock CLK. */
+extern int __lll_robust_abstimed_lock (void *__ptr,
+ const struct timespec *__tsp, int __flags, int __clk);
+
+/* Same as '__lll_robust_lock', but return with an error
+ * if the lock cannot be acquired without blocking. */
+extern int __lll_robust_trylock (void *__ptr);
+
+/* Wake one or more threads waiting on address PTR,
+ * setting its value to VAL before doing so. */
+#define lll_set_wake(ptr, val, flags) \
+ __gsync_wake (__mach_task_self (), \
+ (vm_offset_t)ptr, val, flags | GSYNC_MUTATE)
+
+/* Release the robust lock at PTR. */
+extern void __lll_robust_unlock (void *__ptr, int __flags);
+
+/* Rearrange threads waiting on address SRC to instead wait on
+ * DST, waking one of them if WAIT_ONE is non-zero. */
+#define lll_requeue(src, dst, wake_one, flags) \
+ __gsync_requeue (__mach_task_self (), (vm_offset_t)src, \
+ (vm_offset_t)dst, (boolean_t)wake_one, flags)
+
+/* The following are hacks that allow us to simulate optional
+ * parameters in C, to avoid having to pass the clock id for
+ * every one of these calls, defaulting to CLOCK_REALTIME if
+ * no argument is passed. */
+
+#define lll_abstimed_wait(ptr, val, tsp, flags, ...) \
+ ({ \
+ const clockid_t __clk[] = { CLOCK_REALTIME, ##__VA_ARGS__ }; \
+ __lll_abstimed_wait ((ptr), (val), (tsp), (flags), \
+ __clk[sizeof (__clk) / sizeof (__clk[0]) - 1]); \
+ })
+
+#define lll_abstimed_xwait(ptr, lo, hi, tsp, flags, ...) \
+ ({ \
+ const clockid_t __clk[] = { CLOCK_REALTIME, ##__VA_ARGS__ }; \
+ __lll_abstimed_xwait ((ptr), (lo), (hi), (tsp), (flags), \
+ __clk[sizeof (__clk) / sizeof (__clk[0]) - 1]); \
+ })
+
+#define lll_abstimed_lock(ptr, tsp, flags, ...) \
+ ({ \
+ const clockid_t __clk[] = { CLOCK_REALTIME, ##__VA_ARGS__ }; \
+ __lll_abstimed_lock ((ptr), (tsp), (flags), \
+ __clk[sizeof (__clk) / sizeof (__clk[0]) - 1]); \
+ })
+
+#define lll_robust_abstimed_lock(ptr, tsp, flags, ...) \
+ ({ \
+ const clockid_t __clk[] = { CLOCK_REALTIME, ##__VA_ARGS__ }; \
+ __lll_robust_abstimed_lock ((ptr), (tsp), (flags), \
+ __clk[sizeof (__clk) / sizeof (__clk[0]) - 1]); \
+ })
+
+
+#endif
<http://www.gnu.org/licenses/>. */
#include <hurd.h>
+#include <lowlevellock.h>
+
pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp;
int _hurd_orphaned;
/* Notify any waiting user threads that the id change as been completed. */
++_hurd_pids_changed_stamp;
+ lll_wake (&_hurd_pids_changed_stamp, GSYNC_BROADCAST);
return 0;
}
__mach_port_destroy (__mach_task_self (), ref);
/* Set the owner of the process here too. */
- mutex_lock (&_hurd_id.lock);
+ __mutex_lock (&_hurd_id.lock);
if (!_hurd_check_ids ())
HURD_PORT_USE (&_hurd_ports[INIT_PORT_PROC],
__proc_setowner (port,
(_hurd_id.gen.nuids
? _hurd_id.gen.uids[0] : 0),
!_hurd_id.gen.nuids));
- mutex_unlock (&_hurd_id.lock);
+ __mutex_unlock (&_hurd_id.lock);
(void) &reauth_proc; /* Silence compiler warning. */
}
#include <hurd.h>
#include <hurd/port.h>
#include <hurd/id.h>
+#include <hurdlock.h>
#include "set-hooks.h"
/* Things in the library which want to be run when the auth port changes. */
DEFINE_HOOK (_hurd_reauth_hook, (auth_t new_auth));
-#include <cthreads.h>
-static struct mutex reauth_lock = MUTEX_INITIALIZER;
-
+static unsigned int reauth_lock = LLL_INITIALIZER;
/* Set the auth port to NEW, and reauthenticate
everything used by the library. */
#include <dirent.h>
#include <sys/stat.h>
#include <sys/shm.h>
+#include <hurdlock.h>
/* Description of an shm attachment. */
static struct sysvshm_attach *attach_list;
/* A lock to protect the linked list of shared memory attachments. */
-static struct mutex sysvshm_lock = MUTEX_INITIALIZER;
+static unsigned int sysvshm_lock = LLL_INITIALIZER;
\f
/* Adds a segment attachment. */
$(interface-headers) mach/mach.h mach/mig_support.h mach/error.h \
$(lock-headers) machine-sp.h
lock = spin-solid spin-lock mutex-init mutex-solid
-lock-headers = lock-intern.h machine-lock.h spin-lock.h
+lock-headers = lock-intern.h spin-lock.h
routines = $(mach-syscalls) $(mach-shortcuts) \
mach_init mig_strncpy msg \
mig-alloc mig-dealloc mig-reply \
#define _LOCK_INTERN_H
#include <sys/cdefs.h>
-#include <machine-lock.h>
+#if defined __USE_EXTERN_INLINES && defined _LIBC
+#include <lowlevellock.h>
+#endif
#ifndef _EXTERN_INLINE
#define _EXTERN_INLINE __extern_inline
#endif
+/* The type of a spin lock variable. */
+typedef unsigned int __spin_lock_t;
+
+/* Static initializer for spinlocks. */
+#define __SPIN_LOCK_INITIALIZER 0
/* Initialize LOCK. */
_EXTERN_INLINE void
__spin_lock_init (__spin_lock_t *__lock)
{
- *__lock = __SPIN_LOCK_INITIALIZER;
+ *__lock = LLL_INITIALIZER;
}
#endif
-/* Lock LOCK, blocking if we can't get it. */
-extern void __spin_lock_solid (__spin_lock_t *__lock);
-
/* Lock the spin lock LOCK. */
extern void __spin_lock (__spin_lock_t *__lock);
_EXTERN_INLINE void
__spin_lock (__spin_lock_t *__lock)
{
- if (! __spin_try_lock (__lock))
- __spin_lock_solid (__lock);
+ lll_lock (__lock, 0);
}
#endif
-\f
-/* Name space-clean internal interface to mutex locks.
- Code internal to the C library uses these functions to lock and unlock
- mutex locks. These locks are of type `struct mutex', defined in
- <cthreads.h>. The functions here are name space-clean. If the program
- is linked with the cthreads library, `__mutex_lock_solid' and
- `__mutex_unlock_solid' will invoke the corresponding cthreads functions
- to implement real mutex locks. If not, simple stub versions just use
- spin locks. */
+/* Unlock LOCK. */
+void __spin_unlock (__spin_lock_t *__lock);
+#if defined __USE_EXTERN_INLINES && defined _LIBC
+_EXTERN_INLINE void
+__spin_unlock (__spin_lock_t *__lock)
+{
+ lll_unlock (__lock, 0);
+}
+#endif
-/* Initialize the newly allocated mutex lock LOCK for further use. */
-extern void __mutex_init (void *__lock);
+/* Try to lock LOCK; return nonzero if we locked it, zero if another has. */
+int __spin_try_lock (__spin_lock_t *__lock);
-/* Lock LOCK, blocking if we can't get it. */
-extern void __mutex_lock_solid (void *__lock);
+#if defined __USE_EXTERN_INLINES && defined _LIBC
+_EXTERN_INLINE int
+__spin_try_lock (__spin_lock_t *__lock)
+{
+ return (lll_trylock (__lock) == 0);
+}
+#endif
+
+/* Return nonzero if LOCK is locked. */
+int __spin_lock_locked (__spin_lock_t *__lock);
-/* Finish unlocking LOCK, after the spin lock LOCK->held has already been
- unlocked. This function will wake up any thread waiting on LOCK. */
-extern void __mutex_unlock_solid (void *__lock);
+#if defined __USE_EXTERN_INLINES && defined _LIBC
+_EXTERN_INLINE int
+__spin_lock_locked (__spin_lock_t *__lock)
+{
+ return (*(volatile __spin_lock_t *)__lock != 0);
+}
+#endif
+\f
+/* Name space-clean internal interface to mutex locks. */
+
+/* Initialize the newly allocated mutex lock LOCK for further use. */
+extern void __mutex_init (void *__lock);
/* Lock the mutex lock LOCK. */
_EXTERN_INLINE void
__mutex_lock (void *__lock)
{
- if (! __spin_try_lock ((__spin_lock_t *) __lock))
- __mutex_lock_solid (__lock);
+ __spin_lock ((__spin_lock_t *)__lock);
}
#endif
_EXTERN_INLINE void
__mutex_unlock (void *__lock)
{
- __spin_unlock ((__spin_lock_t *) __lock);
- __mutex_unlock_solid (__lock);
+ __spin_unlock ((__spin_lock_t *)__lock);
}
#endif
_EXTERN_INLINE int
__mutex_trylock (void *__lock)
{
- return __spin_try_lock ((__spin_lock_t *) __lock);
+ return (__spin_try_lock ((__spin_lock_t *)__lock));
}
#endif
--- /dev/null
+/* Copyright (C) 1994-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef __MACH_LOWLEVELLOCK_H__
+#define __MACH_LOWLEVELLOCK_H__ 1
+
+#include <mach/gnumach.h>
+#include <atomic.h>
+
+/* Gsync flags. */
+#ifndef GSYNC_SHARED
+ #define GSYNC_SHARED 0x01
+ #define GSYNC_QUAD 0x02
+ #define GSYNC_TIMED 0x04
+ #define GSYNC_BROADCAST 0x08
+ #define GSYNC_MUTATE 0x10
+#endif
+
+/* Static initializer for low-level locks. */
+#define LLL_INITIALIZER 0
+
+/* Wait on address PTR, without blocking if its contents
+ * are different from VAL. */
+#define lll_wait(ptr, val, flags) \
+ __gsync_wait (__mach_task_self (), \
+ (vm_offset_t)(ptr), (val), 0, 0, (flags))
+
+/* Wake one or more threads waiting on address PTR. */
+#define lll_wake(ptr, flags) \
+ __gsync_wake (__mach_task_self (), (vm_offset_t)(ptr), 0, (flags))
+
+/* Acquire the lock at PTR. */
+#define lll_lock(ptr, flags) \
+ ({ \
+ int *__iptr = (int *)(ptr); \
+ int __flags = (flags); \
+ if (*__iptr != 0 || \
+ atomic_compare_and_exchange_bool_acq (__iptr, 1, 0) != 0) \
+ while (1) \
+ { \
+ if (atomic_exchange_acq (__iptr, 2) == 0) \
+ break; \
+ lll_wait (__iptr, 2, __flags); \
+ } \
+ (void)0; \
+ })
+
+/* Try to acquire the lock at PTR, without blocking.
+ * Evaluates to zero on success. */
+#define lll_trylock(ptr) \
+ ({ \
+ int *__iptr = (int *)(ptr); \
+ *__iptr == 0 && \
+ atomic_compare_and_exchange_bool_acq (__iptr, 1, 0) == 0 ? 0 : -1; \
+ })
+
+/* Release the lock at PTR. */
+#define lll_unlock(ptr, flags) \
+ ({ \
+ int *__iptr = (int *)(ptr); \
+ if (atomic_exchange_rel (__iptr, 0) == 2) \
+ lll_wake (__iptr, (flags)); \
+ (void)0; \
+ })
+
+#endif
<http://www.gnu.org/licenses/>. */
#include <lock-intern.h>
-#include <cthreads.h>
+#include <lowlevellock.h>
void
__mutex_init (void *lock)
{
- /* This happens to be name space-safe because it is a macro.
- It invokes only spin_lock_init, which is a macro for __spin_lock_init;
- and cthread_queue_init, which is a macro for some simple code. */
- mutex_init ((struct mutex *) lock);
+ *(int *)lock = LLL_INITIALIZER;
}
before-compile += $(mach-before-compile)
endif
+ifeq (crypt,$(subdir))
+ LDLIBS-crypt.so += $(objdir)/mach/libmachuser.so
+else ifeq (dlfcn,$(subdir))
+ LDLIBS-dl.so += $(objdir)/mach/libmachuser.so
+else ifeq (nis,$(subdir))
+ LDLIBS-nsl.so += $(objdir)/mach/libmachuser.so
+ LDLIBS-nss_nis.so += $(objdir)/mach/libmachuser.so
+ LDLIBS-nss_nisplus.so += $(objdir)/mach/libmachuser.so
+ LDLIBS-nss_compat.so += $(objdir)/mach/libmachuser.so
+else ifeq (nss,$(subdir))
+ LDLIBS-nss.so += $(objdir)/mach/libmachuser.so
+ LDLIBS-nss_files.so += $(objdir)/mach/libmachuser.so
+ LDLIBS-nss_compat.so += $(objdir)/mach/libmachuser.so
+else ifeq (hesiod,$(subdir))
+ LDLIBS-nss_hesiod.so += $(objdir)/mach/libmachuser.so
+else ifeq (posix,$(subdir))
+ LDLIBS-tst-rfc3484 += $(objdir)/mach/libmachuser.so
+ LDLIBS-tst-rfc3484-2 += $(objdir)/mach/libmachuser.so
+ LDLIBS-tst-rfc3484-3 += $(objdir)/mach/libmachuser.so
+endif
+
+LDLIBS-pthread.so += $(objdir)/mach/libmachuser.so
+
endif # in-Makerules
EPROTO = 0x40000074, /* Protocol error */
ETIME = 0x40000075, /* Timer expired */
ECANCELED = 0x40000077, /* Operation canceled */
+ EOWNERDEAD = 0x40000078, /* Robust mutex owner died */
+ ENOTRECOVERABLE = 0x40000079, /* Robust mutex irrecoverable */
/* Errors from <mach/message.h>. */
EMACH_SEND_IN_PROGRESS = 0x10000001,
#define EPROTO 0x40000074
#define ETIME 0x40000075
#define ECANCELED 0x40000077
+#define EOWNERDEAD 0x40000078
+#define ENOTRECOVERABLE 0x40000079
/* Errors from <mach/message.h>. */
#define EMACH_SEND_IN_PROGRESS 0x10000001
#define ED_NO_MEMORY 2508
#define ED_READ_ONLY 2509
-#define _HURD_ERRNOS 120
+#define _HURD_ERRNOS 122
#endif /* bits/errno.h. */
HURD_CTHREADS_0.3 __cthread_getspecific F
HURD_CTHREADS_0.3 __cthread_keycreate F
HURD_CTHREADS_0.3 __cthread_setspecific F
+HURD_CTHREADS_0.3 __libc_getspecific F
HURD_CTHREADS_0.3 __mutex_init F
HURD_CTHREADS_0.3 __mutex_lock F
HURD_CTHREADS_0.3 __mutex_lock_solid F
+++ /dev/null
-/* libc-internal interface for mutex locks. Hurd version using Mach cthreads.
- Copyright (C) 1996-2018 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#ifndef _LIBC_LOCK_H
-#define _LIBC_LOCK_H 1
-
-#if (_LIBC - 0) || (_CTHREADS_ - 0)
-#if (_LIBC - 0)
-#include <tls.h>
-#endif
-#include <cthreads.h>
-
-/* The locking here is very inexpensive, even for inlining. */
-#define _IO_lock_inexpensive 1
-
-typedef struct mutex __libc_lock_t;
-typedef struct
-{
- struct mutex mutex;
- void *owner;
- int count;
-} __libc_lock_recursive_t;
-typedef __libc_lock_recursive_t __rtld_lock_recursive_t;
-
-extern char __libc_lock_self0[0];
-#define __libc_lock_owner_self() (__LIBC_NO_TLS() ? &__libc_lock_self0 : THREAD_SELF)
-
-#else
-typedef struct __libc_lock_opaque__ __libc_lock_t;
-typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t;
-#endif
-
-/* Define a lock variable NAME with storage class CLASS. The lock must be
- initialized with __libc_lock_init before it can be used (or define it
- with __libc_lock_define_initialized, below). Use `extern' for CLASS to
- declare a lock defined in another module. In public structure
- definitions you must use a pointer to the lock structure (i.e., NAME
- begins with a `*'), because its storage size will not be known outside
- of libc. */
-#define __libc_lock_define(CLASS,NAME) \
- CLASS __libc_lock_t NAME;
-
-/* Define an initialized lock variable NAME with storage class CLASS. */
-#define _LIBC_LOCK_INITIALIZER MUTEX_INITIALIZER
-#define __libc_lock_define_initialized(CLASS,NAME) \
- CLASS __libc_lock_t NAME = _LIBC_LOCK_INITIALIZER;
-
-/* Initialize the named lock variable, leaving it in a consistent, unlocked
- state. */
-#define __libc_lock_init(NAME) __mutex_init (&(NAME))
-
-/* Finalize the named lock variable, which must be locked. It cannot be
- used again until __libc_lock_init is called again on it. This must be
- called on a lock variable before the containing storage is reused. */
-#define __libc_lock_fini(NAME) __mutex_unlock (&(NAME))
-#define __libc_lock_fini_recursive(NAME) __mutex_unlock (&(NAME).mutex)
-#define __rtld_lock_fini_recursive(NAME) __mutex_unlock (&(NAME).mutex)
-
-
-/* Lock the named lock variable. */
-#define __libc_lock_lock(NAME) __mutex_lock (&(NAME))
-
-/* Lock the named lock variable. */
-#define __libc_lock_trylock(NAME) (!__mutex_trylock (&(NAME)))
-
-/* Unlock the named lock variable. */
-#define __libc_lock_unlock(NAME) __mutex_unlock (&(NAME))
-
-
-#define __libc_lock_define_recursive(CLASS,NAME) \
- CLASS __libc_lock_recursive_t NAME;
-#define _LIBC_LOCK_RECURSIVE_INITIALIZER { MUTEX_INITIALIZER, 0, 0 }
-#define __libc_lock_define_initialized_recursive(CLASS,NAME) \
- CLASS __libc_lock_recursive_t NAME = _LIBC_LOCK_RECURSIVE_INITIALIZER;
-
-#define __rtld_lock_define_recursive(CLASS,NAME) \
- __libc_lock_define_recursive (CLASS, NAME)
-#define _RTLD_LOCK_RECURSIVE_INITIALIZER \
- _LIBC_LOCK_RECURSIVE_INITIALIZER
-#define __rtld_lock_define_initialized_recursive(CLASS,NAME) \
- __libc_lock_define_initialized_recursive (CLASS, NAME)
-
-#define __libc_lock_init_recursive(NAME) \
- ({ __libc_lock_recursive_t *const __lock = &(NAME); \
- __lock->owner = 0; mutex_init (&__lock->mutex); })
-
-#define __libc_lock_trylock_recursive(NAME) \
- ({ __libc_lock_recursive_t *const __lock = &(NAME); \
- void *__self = __libc_lock_owner_self (); \
- __mutex_trylock (&__lock->mutex) \
- ? (__lock->owner = __self, __lock->count = 1, 0) \
- : __lock->owner == __self ? (++__lock->count, 0) : 1; })
-
-#define __libc_lock_lock_recursive(NAME) \
- ({ __libc_lock_recursive_t *const __lock = &(NAME); \
- void *__self = __libc_lock_owner_self (); \
- if (__mutex_trylock (&__lock->mutex) \
- || (__lock->owner != __self \
- && (__mutex_lock (&__lock->mutex), 1))) \
- __lock->owner = __self, __lock->count = 1; \
- else \
- ++__lock->count; \
- })
-#define __libc_lock_unlock_recursive(NAME) \
- ({ __libc_lock_recursive_t *const __lock = &(NAME); \
- if (--__lock->count == 0) \
- { \
- __lock->owner = 0; \
- __mutex_unlock (&__lock->mutex); \
- } \
- })
-
-
-#define __rtld_lock_initialize(NAME) \
- (void) ((NAME) = (__rtld_lock_recursive_t) _RTLD_LOCK_RECURSIVE_INITIALIZER)
-#define __rtld_lock_trylock_recursive(NAME) \
- __libc_lock_trylock_recursive (NAME)
-#define __rtld_lock_lock_recursive(NAME) \
- __libc_lock_lock_recursive(NAME)
-#define __rtld_lock_unlock_recursive(NAME) \
- __libc_lock_unlock_recursive (NAME)
-
-
-/* XXX for now */
-#define __libc_rwlock_define __libc_lock_define
-#define __libc_rwlock_define_initialized __libc_lock_define_initialized
-#define __libc_rwlock_init __libc_lock_init
-#define __libc_rwlock_fini __libc_lock_fini
-#define __libc_rwlock_rdlock __libc_lock_lock
-#define __libc_rwlock_wrlock __libc_lock_lock
-#define __libc_rwlock_tryrdlock __libc_lock_trylock
-#define __libc_rwlock_trywrlock __libc_lock_trylock
-#define __libc_rwlock_unlock __libc_lock_unlock
-
-
-/* Start a critical region with a cleanup function */
-#define __libc_cleanup_region_start(DOIT, FCT, ARG) \
-{ \
- typeof (***(FCT)) *__save_FCT = (DOIT) ? (FCT) : 0; \
- typeof (ARG) __save_ARG = ARG; \
- /* close brace is in __libc_cleanup_region_end below. */
-
-/* End a critical region started with __libc_cleanup_region_start. */
-#define __libc_cleanup_region_end(DOIT) \
- if ((DOIT) && __save_FCT != 0) \
- (*__save_FCT)(__save_ARG); \
-}
-
-/* Sometimes we have to exit the block in the middle. */
-#define __libc_cleanup_end(DOIT) \
- if ((DOIT) && __save_FCT != 0) \
- (*__save_FCT)(__save_ARG); \
-
-#define __libc_cleanup_push(fct, arg) __libc_cleanup_region_start (1, fct, arg)
-#define __libc_cleanup_pop(execute) __libc_cleanup_region_end (execute)
-
-#if (_CTHREADS_ - 0)
-
-/* Use mutexes as once control variables. */
-
-struct __libc_once
- {
- __libc_lock_t lock;
- int done;
- };
-
-#define __libc_once_define(CLASS,NAME) \
- CLASS struct __libc_once NAME = { MUTEX_INITIALIZER, 0 }
-
-/* Call handler iff the first call. */
-#define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \
- do { \
- __libc_lock_lock (ONCE_CONTROL.lock); \
- if (!ONCE_CONTROL.done) \
- (INIT_FUNCTION) (); \
- ONCE_CONTROL.done = 1; \
- __libc_lock_unlock (ONCE_CONTROL.lock); \
- } while (0)
-
-/* Get once control variable. */
-#define __libc_once_get(ONCE_CONTROL) ((ONCE_CONTROL).done != 0)
-
-#ifdef _LIBC
-/* We need portable names for some functions. E.g., when they are
- used as argument to __libc_cleanup_region_start. */
-#define __libc_mutex_unlock __mutex_unlock
-#endif
-
-/* Type for key of thread specific data. */
-typedef cthread_key_t __libc_key_t;
-
-#define __libc_key_create(KEY,DEST) cthread_keycreate (KEY)
-#define __libc_setspecific(KEY,VAL) cthread_setspecific (KEY, VAL)
-void *__libc_getspecific (__libc_key_t key);
-
-#endif /* _CTHREADS_ */
-
-/* Hide the definitions which are only supposed to be used inside libc in
- a separate file. This file is not present in the installation! */
-#ifdef _LIBC
-# include <libc-lockP.h>
-#endif
-
-#endif /* libc-lock.h */
#include <unistd.h>
#include <hurd.h>
#include <hurd/port.h>
+#include <lowlevellock.h>
/* Set the process group ID of the process matching PID to PGID.
If PID is zero, the current process's process group ID is set.
/* Synchronize with the signal thread to make sure we have
received and processed proc_newids before returning to the user. */
while (_hurd_pids_changed_stamp == stamp)
- {
-#ifdef noteven
- /* XXX we have no need for a mutex, but cthreads demands one. */
- __condition_wait (&_hurd_pids_changed_sync, NULL);
-#else
- __swtch_pri(0);
-#endif
- }
+ lll_wait (&_hurd_pids_changed_stamp, stamp, 0);
return 0;
#include <hurd/port.h>
#include <hurd/fd.h>
#include <hurd/ioctl.h>
+#include <lowlevellock.h>
/* Create a new session with the calling process as its leader.
The process group IDs of the session and the calling process
returned by `getpgrp ()' in other threads) has been updated before
we return. */
while (_hurd_pids_changed_stamp == stamp)
- {
-#ifdef noteven
- /* XXX we have no need for a mutex, but cthreads demands one. */
- __condition_wait (&_hurd_pids_changed_sync, NULL);
-#else
- __swtch_pri (0);
-#endif
- }
+ lll_wait (&_hurd_pids_changed_stamp, stamp, 0);
}
HURD_CRITICAL_END;
#define _LIBC_LOCK_H 1
#ifdef _LIBC
+
+#include <tls.h>
#include <cthreads.h>
-#define __libc_lock_t struct mutex
+#include <lowlevellock.h>
+
+/* The locking here is very inexpensive, even for inlining. */
+#define _IO_lock_inexpensive 1
+
+typedef unsigned int __libc_lock_t;
+typedef struct
+{
+ __libc_lock_t lock;
+ int cnt;
+ void *owner;
+} __libc_lock_recursive_t;
+
+typedef __libc_lock_recursive_t __rtld_lock_recursive_t;
+
+extern char __libc_lock_self0[0];
+#define __libc_lock_owner_self() \
+ (__LIBC_NO_TLS() ? (void *)&__libc_lock_self0 : THREAD_SELF)
+
#else
typedef struct __libc_lock_opaque__ __libc_lock_t;
+typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t;
#endif
/* Type for key of thread specific data. */
CLASS __libc_lock_t NAME;
/* Define an initialized lock variable NAME with storage class CLASS. */
+#define _LIBC_LOCK_INITIALIZER LLL_INITIALIZER
#define __libc_lock_define_initialized(CLASS,NAME) \
- CLASS __libc_lock_t NAME = MUTEX_INITIALIZER;
+ CLASS __libc_lock_t NAME = LLL_INITIALIZER;
/* Initialize the named lock variable, leaving it in a consistent, unlocked
state. */
-#define __libc_lock_init(NAME) __mutex_init (&(NAME))
+#define __libc_lock_init(NAME) (NAME) = LLL_INITIALIZER
/* Finalize the named lock variable, which must be locked. It cannot be
used again until __libc_lock_init is called again on it. This must be
called on a lock variable before the containing storage is reused. */
-#define __libc_lock_fini(NAME) __mutex_unlock (&(NAME))
+#define __libc_lock_fini __libc_lock_unlock
+#define __libc_lock_fini_recursive __libc_lock_unlock_recursive
+#define __rtld_lock_fini_recursive __rtld_lock_unlock_recursive
/* Lock the named lock variable. */
-#define __libc_lock_lock(NAME) __mutex_lock (&(NAME))
+#define __libc_lock_lock(NAME) \
+ ({ lll_lock (&(NAME), 0); 0; })
/* Lock the named lock variable. */
-#define __libc_lock_trylock(NAME) (!__mutex_trylock (&(NAME)))
+#define __libc_lock_trylock(NAME) lll_trylock (&(NAME))
/* Unlock the named lock variable. */
-#define __libc_lock_unlock(NAME) __mutex_unlock (&(NAME))
-
+#define __libc_lock_unlock(NAME) \
+ ({ lll_unlock (&(NAME), 0); 0; })
+
+#define __libc_lock_define_recursive(CLASS,NAME) \
+ CLASS __libc_lock_recursive_t NAME;
+
+#define _LIBC_LOCK_RECURSIVE_INITIALIZER { LLL_INITIALIZER, 0, 0 }
+
+#define __libc_lock_define_initialized_recursive(CLASS,NAME) \
+ CLASS __libc_lock_recursive_t NAME = _LIBC_LOCK_RECURSIVE_INITIALIZER;
+
+#define __rtld_lock_define_recursive(CLASS,NAME) \
+ __libc_lock_define_recursive (CLASS, NAME)
+#define _RTLD_LOCK_RECURSIVE_INITIALIZER \
+ _LIBC_LOCK_RECURSIVE_INITIALIZER
+#define __rtld_lock_define_initialized_recursive(CLASS,NAME) \
+ __libc_lock_define_initialized_recursive (CLASS, NAME)
+
+#define __libc_lock_init_recursive(NAME) \
+ ((NAME) = (__libc_lock_recursive_t)_LIBC_LOCK_RECURSIVE_INITIALIZER, 0)
+
+#define __libc_lock_trylock_recursive(NAME) \
+ ({ \
+ __libc_lock_recursive_t *const __lock = &(NAME); \
+ void *__self = __libc_lock_owner_self (); \
+ int __r = 0; \
+ if (__self == __lock->owner) \
+ ++__lock->cnt; \
+ else if ((__r = lll_trylock (&__lock->lock)) == 0) \
+ __lock->owner = __self, __lock->cnt = 1; \
+ __r; \
+ })
+
+#define __libc_lock_lock_recursive(NAME) \
+ ({ \
+ __libc_lock_recursive_t *const __lock = &(NAME); \
+ void *__self = __libc_lock_owner_self (); \
+ if (__self != __lock->owner) \
+ { \
+ lll_lock (&__lock->lock, 0); \
+ __lock->owner = __self; \
+ } \
+ ++__lock->cnt; \
+ (void)0; \
+ })
+
+#define __libc_lock_unlock_recursive(NAME) \
+ ({ \
+ __libc_lock_recursive_t *const __lock = &(NAME); \
+ if (--__lock->cnt == 0) \
+ { \
+ __lock->owner = 0; \
+ lll_unlock (&__lock->lock, 0); \
+ } \
+ })
+
+
+#define __rtld_lock_initialize(NAME) \
+ (void) ((NAME) = (__rtld_lock_recursive_t) _RTLD_LOCK_RECURSIVE_INITIALIZER)
+#define __rtld_lock_trylock_recursive(NAME) \
+ __libc_lock_trylock_recursive (NAME)
+#define __rtld_lock_lock_recursive(NAME) \
+ __libc_lock_lock_recursive(NAME)
+#define __rtld_lock_unlock_recursive(NAME) \
+ __libc_lock_unlock_recursive (NAME)
/* XXX for now */
#define __libc_rwlock_define __libc_lock_define
#define __libc_rwlock_trywrlock __libc_lock_trylock
#define __libc_rwlock_unlock __libc_lock_unlock
+struct __libc_cleanup_frame
+{
+ void (*__fct) (void *);
+ void *__argp;
+ int __doit;
+};
+
+__extern_inline void
+__libc_cleanup_fct (struct __libc_cleanup_frame *framep)
+{
+ if (framep->__doit)
+ framep->__fct (framep->__argp);
+}
/* Start a critical region with a cleanup function */
-#define __libc_cleanup_region_start(DOIT, FCT, ARG) \
-{ \
- typeof (***(FCT)) *__save_FCT = (DOIT) ? (FCT) : 0; \
- typeof (ARG) __save_ARG = ARG; \
- /* close brace is in __libc_cleanup_region_end below. */
-
-/* End a critical region started with __libc_cleanup_region_start. */
-#define __libc_cleanup_region_end(DOIT) \
- if ((DOIT) && __save_FCT != 0) \
- (*__save_FCT)(__save_ARG); \
-}
+#define __libc_cleanup_region_start(DOIT, FCT, ARG) \
+ do \
+ { \
+ struct __libc_cleanup_frame __cleanup \
+ __attribute__ ((__cleanup__ (__libc_cleanup_fct))) = \
+ { .__fct = (FCT), .__argp = (ARG), .__doit = (DOIT) };
+
+/* This one closes the brace above. */
+#define __libc_cleanup_region_end(DOIT) \
+ __cleanup.__doit = (DOIT); \
+ } \
+ while (0)
-/* Sometimes we have to exit the block in the middle. */
-#define __libc_cleanup_end(DOIT) \
- if ((DOIT) && __save_FCT != 0) \
- (*__save_FCT)(__save_ARG); \
+#define __libc_cleanup_end(DOIT) __cleanup.__doit = (DOIT);
+#define __libc_cleanup_push(fct, arg) __libc_cleanup_region_start (1, fct, arg)
+#define __libc_cleanup_pop(execute) __libc_cleanup_region_end (execute)
/* Use mutexes as once control variables. */
};
#define __libc_once_define(CLASS,NAME) \
- CLASS struct __libc_once NAME = { MUTEX_INITIALIZER, 0 }
-
+ CLASS struct __libc_once NAME = { _LIBC_LOCK_INITIALIZER, 0 }
/* Call handler iff the first call. */
#define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \
#ifdef _LIBC
/* We need portable names for some functions. E.g., when they are
used as argument to __libc_cleanup_region_start. */
-#define __libc_mutex_unlock __mutex_unlock
-#endif
+#define __libc_mutex_unlock __libc_lock_unlock
#define __libc_key_create(KEY,DEST) cthread_keycreate (KEY)
#define __libc_setspecific(KEY,VAL) cthread_setspecific (KEY, VAL)
void *__libc_getspecific (__libc_key_t key);
-/* XXX until cthreads supports recursive locks */
-#define __libc_lock_define_initialized_recursive __libc_lock_define_initialized
-#define __libc_lock_init_recursive __libc_lock_init
-#define __libc_lock_fini_recursive __libc_lock_fini
-#define __libc_lock_trylock_recursive __libc_lock_trylock
-#define __libc_lock_unlock_recursive __libc_lock_unlock
-#define __libc_lock_lock_recursive __libc_lock_lock
-
-#define __rtld_lock_define_initialized_recursive __libc_lock_define_initialized
-#define __rtld_lock_fini_recursive __libc_lock_fini
-#define __rtld_lock_trylock_recursive __libc_lock_trylock
-#define __rtld_lock_unlock_recursive __libc_lock_unlock
-#define __rtld_lock_lock_recursive __libc_lock_lock
+/* Hide the definitions which are only supposed to be used inside libc in
+ a separate file. This file is not present in the installation! */
+# include <libc-lockP.h>
+#endif
#endif /* libc-lock.h */
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