+++ /dev/null
-/* $NetBSD: reentrant.h,v 1.10 2004/12/14 00:23:19 nathanw Exp $ */
-
-/*-
- * Copyright (c) 1997, 1998, 2003 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by J.T. Conklin, by Nathan J. Williams, and by Jason R. Thorpe.
- *
- * 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 the NetBSD
- * Foundation, Inc. and its contributors.
- * 4. Neither the name of The NetBSD Foundation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
- */
-
-/*
- * Requirements:
- *
- * 1. The thread safe mechanism should be lightweight so the library can
- * be used by non-threaded applications without unreasonable overhead.
- *
- * 2. There should be no dependency on a thread engine for non-threaded
- * applications.
- *
- * 3. There should be no dependency on any particular thread engine.
- *
- * 4. The library should be able to be compiled without support for thread
- * safety.
- *
- *
- * Rationale:
- *
- * One approach for thread safety is to provide discrete versions of the
- * library: one thread safe, the other not. The disadvantage of this is
- * that libc is rather large, and two copies of a library which are 99%+
- * identical is not an efficent use of resources.
- *
- * Another approach is to provide a single thread safe library. However,
- * it should not add significant run time or code size overhead to non-
- * threaded applications.
- *
- * Since the NetBSD C library is used in other projects, it should be
- * easy to replace the mutual exclusion primitives with ones provided by
- * another system. Similarly, it should also be easy to remove all
- * support for thread safety completely if the target environment does
- * not support threads.
- *
- *
- * Implementation Details:
- *
- * The thread primitives used by the library (mutex_t, mutex_lock, etc.)
- * are macros which expand to the cooresponding primitives provided by
- * the thread engine or to nothing. The latter is used so that code is
- * not unreasonably cluttered with #ifdefs when all thread safe support
- * is removed.
- *
- * The thread macros can be directly mapped to the mutex primitives from
- * pthreads, however it should be reasonably easy to wrap another mutex
- * implementation so it presents a similar interface.
- *
- * The thread functions operate by dispatching to symbols which are, by
- * default, weak-aliased to no-op functions in thread-stub/thread-stub.c
- * (some uses of thread operations are conditional on __isthreaded, but
- * not all of them are).
- *
- * When the thread library is linked in, it provides strong-alias versions
- * of those symbols which dispatch to its own real thread operations.
- *
- */
-
-#ifdef _REENTRANT
-
-/*
- * Abtract thread interface for thread-safe libraries. These routines
- * will use stubs in libc if the application is not linked against the
- * pthread library, and the real function in the pthread library if it
- * is.
- */
-
-#include <pthread.h>
-#include <signal.h>
-#include <sys/cdefs.h>
-
-#define mutex_t pthread_mutex_t
-#define MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
-
-#define mutexattr_t pthread_mutexattr_t
-
-#define MUTEX_TYPE_NORMAL PTHREAD_MUTEX_NORMAL
-#define MUTEX_TYPE_ERRORCHECK PTHREAD_MUTEX_ERRORCHECK
-#define MUTEX_TYPE_RECURSIVE PTHREAD_MUTEX_RECURSIVE
-
-#define cond_t pthread_cond_t
-#define COND_INITIALIZER PTHREAD_COND_INITIALIZER
-
-#define condattr_t pthread_condattr_t
-
-#define rwlock_t pthread_rwlock_t
-#define RWLOCK_INITIALIZER PTHREAD_RWLOCK_INITIALIZER
-
-#define rwlockattr_t pthread_rwlockattr_t
-
-#define thread_key_t pthread_key_t
-
-#define thr_t pthread_t
-
-#define thrattr_t pthread_attr_t
-
-#define once_t pthread_once_t
-#define ONCE_INITIALIZER PTHREAD_ONCE_INIT
-
-#ifndef __LIBC_THREAD_STUBS
-
-__BEGIN_DECLS
-int __libc_mutex_init(mutex_t *, const mutexattr_t *);
-int __libc_mutex_lock(mutex_t *);
-int __libc_mutex_trylock(mutex_t *);
-int __libc_mutex_unlock(mutex_t *);
-int __libc_mutex_destroy(mutex_t *);
-
-int __libc_mutexattr_init(mutexattr_t *);
-int __libc_mutexattr_settype(mutexattr_t *, int);
-int __libc_mutexattr_destroy(mutexattr_t *);
-__END_DECLS
-
-#define mutex_init(m, a) __libc_mutex_init((m), (a))
-#define mutex_lock(m) __libc_mutex_lock((m))
-#define mutex_trylock(m) __libc_mutex_trylock((m))
-#define mutex_unlock(m) __libc_mutex_unlock((m))
-#define mutex_destroy(m) __libc_mutex_destroy((m))
-
-#define mutexattr_init(ma) __libc_mutexattr_init((ma))
-#define mutexattr_settype(ma, t) __libc_mutexattr_settype((ma), (t))
-#define mutexattr_destroy(ma) __libc_mutexattr_destroy((ma))
-
-__BEGIN_DECLS
-int __libc_cond_init(cond_t *, const condattr_t *);
-int __libc_cond_signal(cond_t *);
-int __libc_cond_broadcast(cond_t *);
-int __libc_cond_wait(cond_t *, mutex_t *);
-int __libc_cond_timedwait(cond_t *, mutex_t *, const struct timespec *);
-int __libc_cond_destroy(cond_t *);
-__END_DECLS
-
-#define cond_init(c, t, a) __libc_cond_init((c), (a))
-#define cond_signal(c) __libc_cond_signal((c))
-#define cond_broadcast(c) __libc_cond_broadcast((c))
-#define cond_wait(c, m) __libc_cond_wait((c), (m))
-#define cond_timedwait(c, m, t) __libc_cond_timedwait((c), (m), (t))
-#define cond_destroy(c) __libc_cond_destroy((c))
-
-__BEGIN_DECLS
-int __libc_rwlock_init(rwlock_t *, const rwlockattr_t *);
-int __libc_rwlock_rdlock(rwlock_t *);
-int __libc_rwlock_wrlock(rwlock_t *);
-int __libc_rwlock_tryrdlock(rwlock_t *);
-int __libc_rwlock_trywrlock(rwlock_t *);
-int __libc_rwlock_unlock(rwlock_t *);
-int __libc_rwlock_destroy(rwlock_t *);
-__END_DECLS
-
-#define rwlock_init(l, a) __libc_rwlock_init((l), (a))
-#define rwlock_rdlock(l) __libc_rwlock_rdlock((l))
-#define rwlock_wrlock(l) __libc_rwlock_wrlock((l))
-#define rwlock_tryrdlock(l) __libc_rwlock_tryrdlock((l))
-#define rwlock_trywrlock(l) __libc_rwlock_trywrlock((l))
-#define rwlock_unlock(l) __libc_rwlock_unlock((l))
-#define rwlock_destroy(l) __libc_rwlock_destroy((l))
-
-__BEGIN_DECLS
-int __libc_thr_keycreate(thread_key_t *, void (*)(void *));
-int __libc_thr_setspecific(thread_key_t, const void *);
-void *__libc_thr_getspecific(thread_key_t);
-int __libc_thr_keydelete(thread_key_t);
-__END_DECLS
-
-#define thr_keycreate(k, d) __libc_thr_keycreate((k), (d))
-#define thr_setspecific(k, p) __libc_thr_setspecific((k), (p))
-#define thr_getspecific(k) __libc_thr_getspecific((k))
-#define thr_keydelete(k) __libc_thr_keydelete((k))
-
-__BEGIN_DECLS
-int __libc_thr_once(once_t *, void (*)(void));
-int __libc_thr_sigsetmask(int, const sigset_t *, sigset_t *);
-thr_t __libc_thr_self(void);
-int __libc_thr_yield(void);
-void __libc_thr_create(thr_t *, const thrattr_t *,
- void *(*)(void *), void *);
-void __libc_thr_exit(void *) __attribute__((__noreturn__));
-int *__libc_thr_errno(void);
-int __libc_thr_setcancelstate(int, int *);
-__END_DECLS
-
-#define thr_once(o, f) __libc_thr_once((o), (f))
-#define thr_sigsetmask(f, n, o) __libc_thr_sigsetmask((f), (n), (o))
-#define thr_self() __libc_thr_self()
-#define thr_yield() __libc_thr_yield()
-#define thr_create(tp, ta, f, a) __libc_thr_create((tp), (ta), (f), (a))
-#define thr_exit(v) __libc_thr_exit((v))
-#define thr_errno() __libc_thr_errno()
-#define thr_setcancelstate(n, o) __libc_thr_setcancelstate((n),(o))
-#endif /* __LIBC_THREAD_STUBS */
-
-#define FLOCKFILE(fp) __flockfile_internal(fp, 1)
-#define FUNLOCKFILE(fp) __funlockfile_internal(fp, 1)
-
-#else /* _REENTRANT */
-
-#define mutex_init(m, a)
-#define mutex_lock(m)
-#define mutex_trylock(m)
-#define mutex_unlock(m)
-#define mutex_destroy(m)
-
-#define cond_init(c, t, a)
-#define cond_signal(c)
-#define cond_broadcast(c)
-#define cond_wait(c, m)
-#define cond_timedwait(c, m, t)
-#define cond_destroy(c)
-
-#define rwlock_init(l, a)
-#define rwlock_rdlock(l)
-#define rwlock_wrlock(l)
-#define rwlock_tryrdlock(l)
-#define rwlock_trywrlock(l)
-#define rwlock_unlock(l)
-#define rwlock_destroy(l)
-
-#define thr_keycreate(k, d)
-#define thr_setspecific(k, p)
-#define thr_getspecific(k)
-#define thr_keydelete(k)
-
-#define thr_once(o, f)
-#define thr_sigsetmask(f, n, o)
-#define thr_self()
-#define thr_errno()
-
-#define FLOCKFILE(fp)
-#define FUNLOCKFILE(fp)
-
-#endif /* _REENTRANT */
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