From c1f295aa8666eb1c08a1edf944ac5617659a066c Mon Sep 17 00:00:00 2001 From: d <> Date: Fri, 20 Nov 1998 11:18:51 +0000 Subject: Add thread-safety to libc, so that libc_r will build (on i386 at least). All POSIX libc api now there (to P1003.1c/D10) (more md stuff is needed for other libc/arch/*) (setlogin is no longer a special syscall) Add -pthread option to gcc (that makes it use -lc_r and -D_POSIX_THREADS). Doc some re-entrant routines Add libc_r to intro(3) dig() uses some libc srcs and an extra -I was needed there. Add more md stuff to libc_r. Update includes for the pthreads api Update libc_r TODO --- src/lib/libc/include/spinlock.h | 73 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 src/lib/libc/include/spinlock.h (limited to 'src/lib/libc/include/spinlock.h') diff --git a/src/lib/libc/include/spinlock.h b/src/lib/libc/include/spinlock.h new file mode 100644 index 0000000000..e4871f9aed --- /dev/null +++ b/src/lib/libc/include/spinlock.h @@ -0,0 +1,73 @@ +/* + * Copyright (c) 1998 John Birrell . + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by John Birrell. + * 4. Neither the name of the author nor the names of any co-contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $Id: spinlock.h,v 1.1 1998/11/20 11:18:41 d Exp $ + * $OpenBSD: spinlock.h,v 1.1 1998/11/20 11:18:41 d Exp $ + * + * Lock definitions used in both libc and libpthread. + * + */ + +#ifndef _SPINLOCK_H_ +#define _SPINLOCK_H_ +#include +#include + +/* + * Lock structure with room for debugging information. + */ +typedef struct { + volatile register_t access_lock; + volatile long lock_owner; + volatile const char * fname; + volatile int lineno; +} spinlock_t; + +#define _SPINLOCK_INITIALIZER { 0, 0, 0, 0 } + +#define _SPINUNLOCK(_lck) (_lck)->access_lock = 0 +#ifdef _LOCK_DEBUG +#define _SPINLOCK(_lck) _spinlock_debug(_lck, __FILE__, __LINE__) +#else +#define _SPINLOCK(_lck) _spinlock(_lck) +#endif + +/* + * Thread function prototype definitions: + */ +__BEGIN_DECLS +register_t _atomic_lock __P((volatile register_t *)); +register_t _thread_slow_atomic_lock __P((volatile register_t *)); +void _spinlock __P((spinlock_t *)); +void _spinlock_debug __P((spinlock_t *, const char *, int)); +__END_DECLS + +#endif /* _SPINLOCK_H_ */ -- cgit v1.2.3-55-g6feb