Initial commit of libtirpc 0.1.7

Signed-off-by: Steve Dickson <steved@redhat.com>

1 files changed, 126 insertions, 0 deletions

diff --git a/tirpc/reentrant.h b/tirpc/reentrant.h
new file mode 100644
index 0000000..e1c7695
--- /dev/null
+++ b/tirpc/reentrant.h
@@ -0,0 +1,126 @@
+/*-
+ * Copyright (c) 1997,98 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by J.T. Conklin.
+ *
+ * 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.
+ *
+ * $FreeBSD: src/lib/libc/include/reentrant.h,v 1.2 2002/11/01 09:37:17 dfr Exp $
+ */
+
+/*
+ * 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 mutex 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 mutex 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.
+ * 
+ * Stub implementations of the mutex functions are provided with *weak*
+ * linkage.  These functions simply return success.  When linked with a
+ * thread library (i.e. -lpthread), the functions will override the
+ * stubs.
+ */
+#ifndef _REENTRANT_H
+#define _REENTRANT_H
+#include <pthread.h>
+#include <libc_private.h>
+
+#include <stdlib.h>
+
+#define mutex_t			pthread_mutex_t
+#define cond_t			pthread_cond_t
+#define rwlock_t		pthread_rwlock_t
+
+#define thread_key_t		pthread_key_t
+#define MUTEX_INITIALIZER	PTHREAD_MUTEX_INITIALIZER
+#define RWLOCK_INITIALIZER	PTHREAD_RWLOCK_INITIALIZER
+#define mutex_init(m, a)	pthread_mutex_init(m, a)
+#define mutex_lock(m)		pthread_mutex_lock(m)
+#define mutex_unlock(m)		pthread_mutex_unlock(m)
+#define mutex_trylock(m)	pthread_mutex_trylock(m)
+
+#define cond_init(c, a, p)	 pthread_cond_init(c, a)
+#define cond_signal(m)		 pthread_cond_signal(m)
+#define cond_broadcast(m)	 pthread_cond_broadcast(m)
+#define cond_wait(c, m)		 pthread_cond_wait(c, m)
+
+#define rwlock_init(l, a)        pthread_rwlock_init(l, a)
+#define rwlock_rdlock(l)	 pthread_rwlock_rdlock(l)
+#define rwlock_wrlock(l)	 pthread_rwlock_wrlock(l)
+#define rwlock_unlock(l)	 pthread_rwlock_unlock(l)
+
+#define thr_keycreate(k, d)	 pthread_key_create(k, d)
+#define thr_setspecific(k, p)	 pthread_setspecific(k, p)
+#define thr_getspecific(k)	 pthread_getspecific(k)
+#define thr_sigsetmask(f, n, o)	 pthread_sigmask(f, n, o)
+
+#define thr_self()		 pthread_self()
+#define thr_exit(x)		 pthread_exit(x)
+
+#endif /* reentrant.h */