| /* Thread package specific definitions of stream lock type. NPTL version. |
| Copyright (C) 2000, 2001, 2002, 2003, 2007 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #ifndef _BITS_STDIO_LOCK_H |
| #define _BITS_STDIO_LOCK_H 1 |
| |
| #include <bits/libc-lock.h> |
| #include <lowlevellock.h> |
| |
| |
| /* The locking here is very inexpensive, even for inlining. */ |
| #define _IO_lock_inexpensive 1 |
| |
| typedef struct { int lock; int cnt; void *owner; } _IO_lock_t; |
| |
| #define _IO_lock_initializer { LLL_LOCK_INITIALIZER, 0, NULL } |
| |
| #define _IO_lock_init(_name) \ |
| ((_name) = (_IO_lock_t) _IO_lock_initializer , 0) |
| |
| #define _IO_lock_fini(_name) \ |
| ((void) 0) |
| |
| #define _IO_lock_lock(_name) \ |
| do { \ |
| void *__meself = THREAD_SELF; \ |
| if ((_name).owner != __meself) \ |
| { \ |
| lll_lock ((_name).lock, LLL_PRIVATE); \ |
| (_name).owner = __meself; \ |
| } \ |
| ++(_name).cnt; \ |
| } while (0) |
| |
| #define _IO_lock_trylock(_name) \ |
| ({ \ |
| int __result = 0; \ |
| void *__meself = THREAD_SELF; \ |
| if ((_name).owner != __meself) \ |
| { \ |
| if (lll_trylock ((_name).lock) == 0) \ |
| { \ |
| (_name).owner = __meself; \ |
| (_name).cnt = 1; \ |
| } \ |
| else \ |
| __result = EBUSY; \ |
| } \ |
| else \ |
| ++(_name).cnt; \ |
| __result; \ |
| }) |
| |
| #define _IO_lock_unlock(_name) \ |
| do { \ |
| if (--(_name).cnt == 0) \ |
| { \ |
| (_name).owner = NULL; \ |
| lll_unlock ((_name).lock, LLL_PRIVATE); \ |
| } \ |
| } while (0) |
| |
| |
| |
| #define _IO_cleanup_region_start(_fct, _fp) \ |
| __libc_cleanup_region_start (((_fp)->_flags & _IO_USER_LOCK) == 0, _fct, _fp) |
| #define _IO_cleanup_region_start_noarg(_fct) \ |
| __libc_cleanup_region_start (1, _fct, NULL) |
| #define _IO_cleanup_region_end(_doit) \ |
| __libc_cleanup_region_end (_doit) |
| |
| |
| #endif /* bits/stdio-lock.h */ |