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hurd: Reimplement libc locks using mach's gsync

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* hurd/Makefile (routines): Add hurdlock.
	* hurd/Versions (GLIBC_PRIVATE): Added new entry to export the above
	interface.
	(HURD_CTHREADS_0.3): Remove __libc_getspecific.
	* hurd/hurdpid.c: Include <lowlevellock.h>
	(_S_msg_proc_newids): Use lll_wait to synchronize.
	* hurd/hurdsig.c: (reauth_proc): Use __mutex_lock and __mutex_unlock.
	* hurd/setauth.c: Include <hurdlock.h>, use integer for synchronization.
	* mach/Makefile (lock-headers): Remove machine-lock.h.
	* mach/lock-intern.h: Include <lowlevellock.h> instead of
	<machine-lock.h>.
	(__spin_lock_t): New type.
	(__SPIN_LOCK_INITIALIZER): New macro.
	(__spin_lock, __spin_unlock, __spin_try_lock, __spin_lock_locked,
	__mutex_init, __mutex_lock_solid, __mutex_unlock_solid, __mutex_lock,
	__mutex_unlock, __mutex_trylock): Use lll to implement locks.
	* mach/mutex-init.c: Include <lowlevellock.h> instead of <cthreads.h>.
	(__mutex_init): Initialize with lll.
	* manual/errno.texi (EOWNERDEAD, ENOTRECOVERABLE): New errno values.
	* sysdeps/mach/Makefile: Add libmachuser as dependencies for libs
	needing lll.
	* sysdeps/mach/hurd/bits/errno.h: Regenerate.
	* sysdeps/mach/hurd/cthreads.c (__libc_getspecific): Remove function.
	* sysdeps/mach/hurd/bits/libc-lock.h: Remove file.
	* sysdeps/mach/hurd/setpgid.c: Include <lowlevellock.h>.
	(__setpgid): Use lll for synchronization.
	* sysdeps/mach/hurd/setsid.c: Likewise with __setsid.
	* sysdeps/mach/bits/libc-lock.h: Include <tls.h> and <lowlevellock.h>
	instead of <cthreads.h>.
	(_IO_lock_inexpensive): New macro
	(__libc_lock_recursive_t, __rtld_lock_recursive_t): New structures.
	(__libc_lock_self0): New declaration.
	(__libc_lock_owner_self): New macro.
	(__libc_key_t): Remove type.
	(_LIBC_LOCK_INITIALIZER): New macro.
	(__libc_lock_define_initialized, __libc_lock_init, __libc_lock_fini,
	__libc_lock_fini_recursive, __rtld_lock_fini_recursive,
	__libc_lock_lock, __libc_lock_trylock, __libc_lock_unlock,
	__libc_lock_define_initialized_recursive,
	__rtld_lock_define_initialized_recursive,
	__libc_lock_init_recursive, __libc_lock_trylock_recursive,
	__libc_lock_lock_recursive, __libc_lock_unlock_recursive,
	__rtld_lock_initialize, __rtld_lock_trylock_recursive,
	__rtld_lock_lock_recursive, __rtld_lock_unlock_recursive
	__libc_once_define, __libc_mutex_unlock): Reimplement with lll.
	(__libc_lock_define_recursive, __rtld_lock_define_recursive,
	_LIBC_LOCK_RECURSIVE_INITIALIZER, _RTLD_LOCK_RECURSIVE_INITIALIZER):
	New macros.
	Include <libc-lockP.h> to reimplement libc_key* with pthread_key*.
	* hurd/hurdlock.c: New file.
	* hurd/hurdlock.h: New file.
	* mach/lowlevellock.h: New file
This commit is contained in:
Agustina Arzille 2018-03-18 18:22:55 +01:00 committed by Samuel Thibault
parent 542c20a171
commit fb4cc8a0c2
20 changed files with 689 additions and 314 deletions
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52
ChangeLog
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@ -6,6 +6,58 @@
__libc_cleanup_end): Rewrite implementation using
__attribute__ ((__cleanup__)).
(__libc_cleanup_push, __libc_cleanup_pop): New macros.
* hurd/Makefile (routines): Add hurdlock.
* hurd/Versions (GLIBC_PRIVATE): Added new entry to export the above
interface.
(HURD_CTHREADS_0.3): Remove __libc_getspecific.
* hurd/hurdpid.c: Include <lowlevellock.h>
(_S_msg_proc_newids): Use lll_wait to synchronize.
* hurd/hurdsig.c: (reauth_proc): Use __mutex_lock and __mutex_unlock.
* hurd/setauth.c: Include <hurdlock.h>, use integer for synchronization.
* mach/Makefile (lock-headers): Remove machine-lock.h.
* mach/lock-intern.h: Include <lowlevellock.h> instead of
<machine-lock.h>.
(__spin_lock_t): New type.
(__SPIN_LOCK_INITIALIZER): New macro.
(__spin_lock, __spin_unlock, __spin_try_lock, __spin_lock_locked,
__mutex_init, __mutex_lock_solid, __mutex_unlock_solid, __mutex_lock,
__mutex_unlock, __mutex_trylock): Use lll to implement locks.
* mach/mutex-init.c: Include <lowlevellock.h> instead of <cthreads.h>.
(__mutex_init): Initialize with lll.
* manual/errno.texi (EOWNERDEAD, ENOTRECOVERABLE): New errno values.
* sysdeps/mach/Makefile: Add libmachuser as dependencies for libs
needing lll.
* sysdeps/mach/hurd/bits/errno.h: Regenerate.
* sysdeps/mach/hurd/cthreads.c (__libc_getspecific): Remove function.
* sysdeps/mach/hurd/bits/libc-lock.h: Remove file.
* sysdeps/mach/hurd/setpgid.c: Include <lowlevellock.h>.
(__setpgid): Use lll for synchronization.
* sysdeps/mach/hurd/setsid.c: Likewise with __setsid.
* sysdeps/mach/bits/libc-lock.h: Include <tls.h> and <lowlevellock.h>
instead of <cthreads.h>.
(_IO_lock_inexpensive): New macro
(__libc_lock_recursive_t, __rtld_lock_recursive_t): New structures.
(__libc_lock_self0): New declaration.
(__libc_lock_owner_self): New macro.
(__libc_key_t): Remove type.
(_LIBC_LOCK_INITIALIZER): New macro.
(__libc_lock_define_initialized, __libc_lock_init, __libc_lock_fini,
__libc_lock_fini_recursive, __rtld_lock_fini_recursive,
__libc_lock_lock, __libc_lock_trylock, __libc_lock_unlock,
__libc_lock_define_initialized_recursive,
__rtld_lock_define_initialized_recursive,
__libc_lock_init_recursive, __libc_lock_trylock_recursive,
__libc_lock_lock_recursive, __libc_lock_unlock_recursive,
__rtld_lock_initialize, __rtld_lock_trylock_recursive,
__rtld_lock_lock_recursive, __rtld_lock_unlock_recursive
__libc_once_define, __libc_mutex_unlock): Reimplement with lll.
(__libc_lock_define_recursive, __rtld_lock_define_recursive,
_LIBC_LOCK_RECURSIVE_INITIALIZER, _RTLD_LOCK_RECURSIVE_INITIALIZER):
New macros.
Include <libc-lockP.h> to reimplement libc_key* with pthread_key*.
* hurd/hurdlock.c: New file.
* hurd/hurdlock.h: New file.
* mach/lowlevellock.h: New file
2018-03-18 Samuel Thibault <samuel.thibault@ens-lyon.org>

1
hurd/Makefile
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@ -54,6 +54,7 @@ routines = hurdstartup hurdinit \
vpprintf \
ports-get ports-set hurdports hurdmsg \
errno-loc \
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 \

9
hurd/Versions
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@ -147,6 +147,13 @@ libc {
# cthreads functions with stubs in libc
__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;
}
}

215
hurd/hurdlock.c Normal file
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@ -0,0 +1,215 @@
/* Hurd helpers for lowlevellocks.
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 <hurd/hurd.h>
#include <time.h>
#include <errno.h>
#include <unistd.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. */
/* 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;
}
}

125
hurd/hurdlock.h Normal file
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@ -0,0 +1,125 @@
/* Low-level lock implementation. High-level Hurd helpers.
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

3
hurd/hurdpid.c
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@ -16,6 +16,8 @@
<http://www.gnu.org/licenses/>. */
#include <hurd.h>
#include <lowlevellock.h>
pid_t _hurd_pid, _hurd_ppid, _hurd_pgrp;
int _hurd_orphaned;
@ -66,6 +68,7 @@ _S_msg_proc_newids (mach_port_t me,
/* 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;
}

4
hurd/hurdsig.c
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@ -1362,14 +1362,14 @@ reauth_proc (mach_port_t new)
__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. */
}

5
hurd/setauth.c
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@ -18,14 +18,13 @@
#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. */

2
mach/Makefile
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@ -23,7 +23,7 @@ headers = mach_init.h mach.h mach_error.h mach-shortcuts.h mach/mach_traps.h \
$(interface-headers) mach/mach.h mach/mig_support.h mach/error.h \
$(lock-headers) machine-sp.h bits/mach/param.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 \

71
mach/lock-intern.h
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@ -19,12 +19,19 @@
#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 LLL_INITIALIZER
/* Initialize LOCK. */
@ -50,32 +57,48 @@ 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
/* Unlock LOCK. */
extern 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
/* Try to lock LOCK; return nonzero if we locked it, zero if another has. */
extern int __spin_try_lock (__spin_lock_t *__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. */
extern int __spin_lock_locked (__spin_lock_t *__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
/* 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. */
/* 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 LOCK, blocking if we can't get it. */
extern void __mutex_lock_solid (void *__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);
/* Lock the mutex lock LOCK. */
extern void __mutex_lock (void *__lock);
@ -84,8 +107,7 @@ extern void __mutex_lock (void *__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
@ -97,8 +119,7 @@ extern void __mutex_unlock (void *__lock);
_EXTERN_INLINE void
__mutex_unlock (void *__lock)
{
__spin_unlock ((__spin_lock_t *) __lock);
__mutex_unlock_solid (__lock);
__spin_unlock ((__spin_lock_t *)__lock);
}
#endif
@ -109,7 +130,7 @@ extern int __mutex_trylock (void *__lock);
_EXTERN_INLINE int
__mutex_trylock (void *__lock)
{
return __spin_try_lock ((__spin_lock_t *) __lock);
return (__spin_try_lock ((__spin_lock_t *)__lock));
}
#endif

81
mach/lowlevellock.h Normal file
View File

@ -0,0 +1,81 @@
/* Low-level lock implementation. Mach gsync-based version.
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

7
mach/mutex-init.c
View File

@ -17,13 +17,10 @@
<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;
}

10
manual/errno.texi
View File

@ -882,6 +882,16 @@ the normal result is for the operations affected to complete with this
error; @pxref{Cancel AIO Operations}.
@end deftypevr
@deftypevr Macro int EOWNERDEAD
@standards{GNU, errno.h}
@errno{EOWNERDEAD, 120, Owner died}
@end deftypevr
@deftypevr Macro int ENOTRECOVERABLE
@standards{GNU, errno.h}
@errno{ENOTRECOVERABLE, 121, State not recoverable}
@end deftypevr
@emph{The following error codes are defined by the Linux/i386 kernel.
They are not yet documented.}

26
sysdeps/mach/Makefile
View File

@ -50,4 +50,30 @@ mach-before-compile:
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_db.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 += $(objdir)/mach/libmachuser.so
else ifeq (nscd,$(subdir))
LDLIBS-nscd += $(objdir)/mach/libmachuser.so
endif
LDLIBS-pthread.so += $(objdir)/mach/libmachuser.so
endif # in-Makerules

6
sysdeps/mach/hurd/bits/errno.h
View File

@ -127,6 +127,8 @@ enum __error_t_codes
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,
@ -322,6 +324,8 @@ enum __error_t_codes
#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
@ -405,6 +409,6 @@ enum __error_t_codes
#define ED_NO_MEMORY 2508
#define ED_READ_ONLY 2509
#define _HURD_ERRNOS 120
#define _HURD_ERRNOS 122
#endif /* bits/errno.h. */

10
sysdeps/mach/hurd/cthreads.c
View File

@ -52,13 +52,3 @@ __cthread_setspecific (cthread_key_t key, void *val)
__set_errno (ENOSYS);
return -1;
}
/* Call cthread_getspecific which gets a pointer to the return value instead
of just returning it. */
void *
__libc_getspecific (cthread_key_t key)
{
void *val;
__cthread_getspecific (key, &val);
return val;
}

216
sysdeps/mach/hurd/libc-lock.h
View File

@ -1,216 +0,0 @@
/* 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)
#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 */

10
sysdeps/mach/hurd/setpgid.c
View File

@ -19,6 +19,7 @@
#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.
@ -38,14 +39,7 @@ __setpgid (pid_t pid, pid_t pgid)
/* 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;

10
sysdeps/mach/hurd/setsid.c
View File

@ -21,6 +21,7 @@
#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
@ -55,14 +56,7 @@ __setsid (void)
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;

140
sysdeps/mach/libc-lock.h
View File

@ -20,15 +20,32 @@
#define _LIBC_LOCK_H 1
#ifdef _LIBC
#include <cthreads.h>
#define __libc_lock_t struct mutex
#include <tls.h>
#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. */
typedef cthread_key_t __libc_key_t;
/* 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
@ -40,27 +57,97 @@ typedef cthread_key_t __libc_key_t;
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
@ -95,7 +182,7 @@ __libc_cleanup_fct (struct __libc_cleanup_frame *framep)
__attribute__ ((__cleanup__ (__libc_cleanup_fct))) = \
{ .__fct = (FCT), .__argp = (ARG), .__doit = (DOIT) };
/* This one closes the brace above. */
/* This one closes the brace above. */
#define __libc_cleanup_region_end(DOIT) \
__cleanup.__doit = (DOIT); \
} \
@ -106,7 +193,7 @@ __libc_cleanup_fct (struct __libc_cleanup_frame *framep)
#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. */
/* Use mutexes as once control variables. */
struct __libc_once
{
@ -115,8 +202,7 @@ struct __libc_once
};
#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) \
@ -134,25 +220,11 @@ struct __libc_once
#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
#define __libc_mutex_unlock __libc_lock_unlock
/* 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
#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
#endif /* libc-lock.h */