mirror of
https://sourceware.org/git/glibc.git
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* sysdeps/mach/hurd/bits/libc-lock.h: New file, initially copied from
sysdeps/mach version. Implement counting ("recursive") mutexes
on top of cthreads mutexes.
* sysdeps/mach/hurd/bits/stdio-lock.h: File removed; generic now works.
* sysdeps/generic/bits/stdio-lock.h (_IO_lock_initializer): Define to
_LIBC_LOCK_RECURSIVE_INITIALIZER if defined, else do an #error.
(__libc_cleanup_region_start, __libc_cleanup_region_end,
__libc_clean_end): Define these to call the cleanup function after
normal exit when they're supposed to.
* sysdeps/mach/bits/libc-lock.h (__libc_cleanup_region_start):
Take new first arg DOIT, a boolean saying whether to really install
any cleanup handler.
(__libc_cleanup_region_end): Do nothing if start's DOIT arg was zero.
(__libc_cleanup_end): Likewise.
* stdio-common/vfscanf.c (LOCK_STREAM): Pass new arg.
* stdio-common/vfprintf.c (buffered_vfprintf, vfprintf): Likewise.
* sysdeps/mach/hurd/bits/stdio-lock.h (_IO_cleanup_region_start):
Likewise.
* misc/syslog.c (vsyslog, openlog, closelog): Likewise.
* sysdeps/generic/bits/stdio-lock.h
(_IO_cleanup_region_start, _IO_cleanup_region_start_noarg): Likewise.
This commit is contained in:
Roland McGrath
parent
28cb929572
commit
0dce3d154c
26
ChangeLog
26
ChangeLog
@ -1,3 +1,29 @@
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2001-08-23 Roland McGrath <roland@frob.com>
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* sysdeps/mach/hurd/bits/libc-lock.h: New file, initially copied from
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sysdeps/mach version. Implement counting ("recursive") mutexes
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on top of cthreads mutexes.
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* sysdeps/mach/hurd/bits/stdio-lock.h: File removed; generic now works.
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* sysdeps/generic/bits/stdio-lock.h (_IO_lock_initializer): Define to
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_LIBC_LOCK_RECURSIVE_INITIALIZER if defined, else do an #error.
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(__libc_cleanup_region_start, __libc_cleanup_region_end,
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__libc_clean_end): Define these to call the cleanup function after
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normal exit when they're supposed to.
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* sysdeps/mach/bits/libc-lock.h (__libc_cleanup_region_start):
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Take new first arg DOIT, a boolean saying whether to really install
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any cleanup handler.
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(__libc_cleanup_region_end): Do nothing if start's DOIT arg was zero.
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(__libc_cleanup_end): Likewise.
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* stdio-common/vfscanf.c (LOCK_STREAM): Pass new arg.
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* stdio-common/vfprintf.c (buffered_vfprintf, vfprintf): Likewise.
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* sysdeps/mach/hurd/bits/stdio-lock.h (_IO_cleanup_region_start):
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Likewise.
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* misc/syslog.c (vsyslog, openlog, closelog): Likewise.
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* sysdeps/generic/bits/stdio-lock.h
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(_IO_cleanup_region_start, _IO_cleanup_region_start_noarg): Likewise.
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2001-08-23 Jakub Jelinek <jakub@redhat.com>
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* elf/ldconfig.c (search_dir): Remove stale symlinks.
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@ -216,7 +216,7 @@ vsyslog(pri, fmt, ap)
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/* Prepare for multiple users. We have to take care: open and
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write are cancellation points. */
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__libc_cleanup_region_start ((void (*) (void *)) cancel_handler,
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__libc_cleanup_region_start (1, (void (*) (void *)) cancel_handler,
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&oldaction_ptr);
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__libc_lock_lock (syslog_lock);
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@ -315,7 +315,8 @@ void
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openlog (const char *ident, int logstat, int logfac)
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{
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/* Protect against multiple users. */
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__libc_cleanup_region_start ((void (*) __P ((void *))) __libc_mutex_unlock,
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__libc_cleanup_region_start (1,
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(void (*) __P ((void *))) __libc_mutex_unlock,
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&syslog_lock);
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__libc_lock_lock (syslog_lock);
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@ -346,7 +347,8 @@ void
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closelog ()
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{
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/* Protect against multiple users. */
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__libc_cleanup_region_start ((void (*) __P ((void *))) __libc_mutex_unlock,
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__libc_cleanup_region_start (1,
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(void (*) __P ((void *))) __libc_mutex_unlock,
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&syslog_lock);
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__libc_lock_lock (syslog_lock);
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@ -1296,10 +1296,10 @@ vfprintf (FILE *s, const CHAR_T *format, va_list ap)
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/* Lock stream. */
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#ifdef USE_IN_LIBIO
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__libc_cleanup_region_start ((void (*) (void *)) &_IO_funlockfile, s);
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__libc_cleanup_region_start (1, (void (*) (void *)) &_IO_funlockfile, s);
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_IO_flockfile (s);
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#else
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__libc_cleanup_region_start ((void (*) (void *)) &__funlockfile, s);
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__libc_cleanup_region_start (1, (void (*) (void *)) &__funlockfile, s);
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__flockfile (s);
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#endif
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@ -2086,7 +2086,7 @@ buffered_vfprintf (register _IO_FILE *s, const CHAR_T *format,
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result = vfprintf (hp, format, args);
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/* Lock stream. */
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__libc_cleanup_region_start ((void (*) (void *)) &_IO_funlockfile, s);
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__libc_cleanup_region_start (1, (void (*) (void *)) &_IO_funlockfile, s);
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_IO_flockfile (s);
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/* Now flush anything from the helper to the S. */
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@ -168,7 +168,7 @@
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} \
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} while (0)
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# define LOCK_STREAM(S) \
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__libc_cleanup_region_start ((void (*) (void *)) &_IO_funlockfile, (S)); \
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__libc_cleanup_region_start (1, (void (*) (void *)) &_IO_funlockfile, (S)); \
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_IO_flockfile (S)
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# define UNLOCK_STREAM(S) \
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_IO_funlockfile (S); \
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@ -76,21 +76,21 @@ typedef cthread_key_t __libc_key_t;
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/* Start a critical region with a cleanup function */
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#define __libc_cleanup_region_start(FCT, ARG) \
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#define __libc_cleanup_region_start(DOIT, FCT, ARG) \
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{ \
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typeof (***(FCT)) *__save_FCT = FCT; \
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typeof (***(FCT)) *__save_FCT = (DOIT) ? (FCT) : 0; \
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typeof (ARG) __save_ARG = ARG; \
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/* close brace is in __libc_cleanup_region_end below. */
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/* End a critical region started with __libc_cleanup_region_start. */
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#define __libc_cleanup_region_end(DOIT) \
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if (DOIT) \
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if ((DOIT) && __save_FCT != 0) \
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(*__save_FCT)(__save_ARG); \
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}
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/* Sometimes we have to exit the block in the middle. */
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#define __libc_cleanup_end(DOIT) \
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if (DOIT) \
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if ((DOIT) && __save_FCT != 0) \
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(*__save_FCT)(__save_ARG); \
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183
sysdeps/mach/hurd/bits/libc-lock.h
Normal file
183
sysdeps/mach/hurd/bits/libc-lock.h
Normal file
@ -0,0 +1,183 @@
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/* libc-internal interface for mutex locks. Hurd version using Mach cthreads.
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Copyright (C) 1996,97,98,2000,01 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _BITS_LIBC_LOCK_H
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#define _BITS_LIBC_LOCK_H 1
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#if (_LIBC - 0) || (_CTHREADS_ - 0)
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#include <cthreads.h>
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#include <hurd/threadvar.h>
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typedef struct mutex __libc_lock_t;
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typedef struct
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{
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struct mutex mutex;
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void *owner;
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int count;
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} __libc_lock_recursive_t;
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#define __libc_lock_owner_self() ((void *) __hurd_threadvar_location (0))
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#else
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typedef struct __libc_lock_opaque__ __libc_lock_t;
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typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t;
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#endif
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/* Define a lock variable NAME with storage class CLASS. The lock must be
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initialized with __libc_lock_init before it can be used (or define it
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with __libc_lock_define_initialized, below). Use `extern' for CLASS to
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declare a lock defined in another module. In public structure
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definitions you must use a pointer to the lock structure (i.e., NAME
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begins with a `*'), because its storage size will not be known outside
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of libc. */
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#define __libc_lock_define(CLASS,NAME) \
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CLASS __libc_lock_t NAME;
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/* Define an initialized lock variable NAME with storage class CLASS. */
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#define __libc_lock_define_initialized(CLASS,NAME) \
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CLASS __libc_lock_t NAME = MUTEX_INITIALIZER;
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/* Initialize the named lock variable, leaving it in a consistent, unlocked
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state. */
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#define __libc_lock_init(NAME) __mutex_init (&(NAME))
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/* Finalize the named lock variable, which must be locked. It cannot be
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used again until __libc_lock_init is called again on it. This must be
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called on a lock variable before the containing storage is reused. */
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#define __libc_lock_fini(NAME) __mutex_unlock (&(NAME))
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#define __libc_lock_fini_recursive(NAME) __mutex_unlock (&(NAME).mutex)
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/* Lock the named lock variable. */
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#define __libc_lock_lock(NAME) __mutex_lock (&(NAME))
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/* Lock the named lock variable. */
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#define __libc_lock_trylock(NAME) (!__mutex_trylock (&(NAME)))
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/* Unlock the named lock variable. */
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#define __libc_lock_unlock(NAME) __mutex_unlock (&(NAME))
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#define __libc_lock_define_recursive(CLASS,NAME) \
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CLASS __libc_lock_recursive_t NAME;
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#define _LIBC_LOCK_RECURSIVE_INITIALIZER { MUTEX_INITIALIZER, 0, 0 }
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#define __libc_lock_define_initialized_recursive(CLASS,NAME) \
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CLASS __libc_lock_recursive_t NAME = _LIBC_LOCK_RECURSIVE_INITIALIZER;
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#define __libc_lock_init_recursive(NAME) \
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({ __libc_lock_recursive_t *const __lock = &(NAME); \
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__lock->owner = 0; mutex_init (&__lock->mutex); })
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#define __libc_lock_trylock_recursive(NAME) \
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({ __libc_lock_recursive_t *const __lock = &(NAME); \
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void *__self = __libc_lock_owner_self (); \
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__mutex_trylock (&__lock->mutex) \
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? (__lock->owner = __self, __lock->count = 1, 0) \
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: __lock->owner == __self ? (++__lock->count, 0) : 1; })
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#define __libc_lock_lock_recursive(NAME) \
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({ __libc_lock_recursive_t *const __lock = &(NAME); \
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void *__self = __libc_lock_owner_self (); \
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if (__mutex_trylock (&__lock->mutex) \
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|| (__lock->owner != __self \
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&& (__mutex_lock (&__lock->mutex), 1))) \
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__lock->owner = __self, __lock->count = 1; \
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else \
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++__lock->count; \
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})
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#define __libc_lock_unlock_recursive(NAME) \
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({ __libc_lock_recursive_t *const __lock = &(NAME); \
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if (--__lock->count == 0) \
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{ \
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__lock->owner = 0; \
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__mutex_unlock (&__lock->mutex); \
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} \
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})
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/* XXX for now */
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#define __libc_rwlock_define __libc_lock_define
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#define __libc_rwlock_define_initialized __libc_lock_define_initialized
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#define __libc_rwlock_init __libc_lock_init
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#define __libc_rwlock_fini __libc_lock_fini
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#define __libc_rwlock_rdlock __libc_lock_lock
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#define __libc_rwlock_wrlock __libc_lock_lock
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#define __libc_rwlock_tryrdlock __libc_lock_trylock
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#define __libc_rwlock_trywrlock __libc_lock_trylock
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#define __libc_rwlock_unlock __libc_lock_unlock
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/* Start a critical region with a cleanup function */
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#define __libc_cleanup_region_start(DOIT, FCT, ARG) \
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{ \
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typeof (***(FCT)) *__save_FCT = (DOIT) ? (FCT) : 0; \
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typeof (ARG) __save_ARG = ARG; \
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/* close brace is in __libc_cleanup_region_end below. */
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/* End a critical region started with __libc_cleanup_region_start. */
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#define __libc_cleanup_region_end(DOIT) \
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if ((DOIT) && __save_FCT != 0) \
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(*__save_FCT)(__save_ARG); \
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}
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/* Sometimes we have to exit the block in the middle. */
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#define __libc_cleanup_end(DOIT) \
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if ((DOIT) && __save_FCT != 0) \
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(*__save_FCT)(__save_ARG); \
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#if (_CTHREADS_ - 0)
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/* Use mutexes as once control variables. */
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struct __libc_once
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{
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__libc_lock_t lock;
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int done;
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};
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#define __libc_once_define(CLASS,NAME) \
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CLASS struct __libc_once NAME = { MUTEX_INITIALIZER, 0 }
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/* Call handler iff the first call. */
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#define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \
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do { \
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__libc_lock_lock (ONCE_CONTROL.lock); \
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if (!ONCE_CONTROL.done) \
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(INIT_FUNCTION) (); \
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ONCE_CONTROL.done = 1; \
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__libc_lock_unlock (ONCE_CONTROL.lock); \
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} while (0)
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#ifdef _LIBC
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/* We need portable names for some functions. E.g., when they are
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used as argument to __libc_cleanup_region_start. */
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#define __libc_mutex_unlock __mutex_unlock
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#endif
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/* Type for key of thread specific data. */
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typedef cthread_key_t __libc_key_t;
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#define __libc_key_create(KEY,DEST) cthread_keycreate (KEY)
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#define __libc_setspecific(KEY,VAL) cthread_setspecific (KEY, VAL)
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void *__libc_getspecific (__libc_key_t key);
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#endif /* _CTHREADS_ */
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#endif /* bits/libc-lock.h */
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@ -1,65 +0,0 @@
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/* Thread package specific definitions of stream lock type. Hurd version.
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Copyright (C) 2000, 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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Lesser General Public License for more details.
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|
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You should have received a copy of the GNU Lesser General Public
|
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _BITS_STDIO_LOCK_H
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#define _BITS_STDIO_LOCK_H 1
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/* We need recursive (counting) mutexes. Since cthreads doesn't really
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have them, we implement them just for libio. The implementation is
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partially here and partially in Hurd's version of cthreads (i.e. the
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libthreads library, libthreads/lockfile.c). */
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#if (_LIBC - 0) || (_CTHREADS_ - 0)
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#include <cthreads.h>
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struct _IO_cthreads_lock
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{
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struct mutex mutex;
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cthread_t owner;
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unsigned int count;
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};
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#else
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struct _IO_cthreads_lock;
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#endif
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typedef struct _IO_cthreads_lock _IO_lock_t;
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#define _IO_lock_initializer { MUTEX_INITIALIZER, 0, 0 }
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#define _IO_lock_init(_name) ({ (_name) = (_IO_lock_t) _IO_lock_initializer; })
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#define _IO_lock_fini(_name) ((void) 0) /* nothing to do */
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/* These are in fact only used for `list_all_lock' (libio/genops.c),
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which does not need a recursive lock. The per-FILE locks are only
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accessed through _IO_flockfile et al, which Hurd's libthreads overrides. */
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#define _IO_lock_lock(_name) __libc_lock_lock ((_name).mutex)
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#define _IO_lock_unlock(_name) __libc_lock_unlock ((_name).mutex)
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#ifdef _LIBC
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#include <bits/libc-lock.h>
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#define _IO_cleanup_region_start(_fct, _fp) \
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__libc_cleanup_region_start (_fct, _fp)
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#define _IO_cleanup_region_start_noarg(_fct) \
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__libc_cleanup_region_start (_fct, NULL)
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#define _IO_cleanup_region_end(_doit) \
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__libc_cleanup_region_end (_doit)
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#endif
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#endif /* bits/stdio-lock.h */
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