Reviewed by: Russell Carter

Submitted by:	"Richard Seaman, Jr." <dick@tar.com>

Native FreeBSD port of the linuxthreads library
Includes added files and stuff you need to add to the rest of your system.
This is for -current  I'm sure Richard's older version might be
a good place to start for a 3.x version.

1 files changed, 127 insertions, 0 deletions

diff --git a/devel/linuxthreads/files/libc_thread.c b/devel/linuxthreads/files/libc_thread.c
new file mode 100644
index 000000000000..1201a6daf6bb
--- /dev/null
+++ b/devel/linuxthreads/files/libc_thread.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 1999 Richard Seaman, Jr.
+ * 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 Richard Seaman, Jr.
+ * 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 RICHARD SEAMAN, Jr. 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.
+ *
+ */
+
+#ifndef _THREAD_SAFE
+#define _THREAD_SAFE
+#endif
+
+#include "pthread.h"
+/* Our internal pthreads definitions are here. Set as needed */
+#if defined(COMPILING_UTHREADS)
+#include "pthread_private.h"
+#endif
+#if defined(LINUXTHREADS)
+#include "internals.h"
+#else
+/* Your internal definition here */
+#endif
+
+/* These are from lib/libc/include */
+#include "libc_private.h"
+#if !defined(LINUXTHREADS)
+#include "spinlock.h"
+#endif
+
+/* This is defined in lib/libc/stdlib/exit.c.  It turns on thread safe
+ * behavior in libc if non-zero.
+ */
+extern int __isthreaded;
+
+/* Optional.  In case our code is dependant on the existence of
+ * the posix priority extentions kernel option.
+ */
+#if defined(LINUXTHREADS)
+#include <sys/sysctl.h>
+int _posix_priority_scheduling;
+#endif
+
+#if defined(NEWLIBC)
+/* The following are needed if we're going to get thread safe behavior
+ * in the time functions in lib/libc/stdtime/localtime.c
+ */
+#if defined(COMPILING_UTHREADS)
+static struct pthread_mutex	_lcl_mutexd = PTHREAD_MUTEX_STATIC_INITIALIZER;
+static struct pthread_mutex	_gmt_mutexd = PTHREAD_MUTEX_STATIC_INITIALIZER;
+static struct pthread_mutex	_localtime_mutexd = PTHREAD_MUTEX_STATIC_INITIALIZER;
+static struct pthread_mutex	_gmtime_mutexd = PTHREAD_MUTEX_STATIC_INITIALIZER;
+static pthread_mutex_t		_lcl_mutex   = &_lcl_mutexd;
+static pthread_mutex_t		_gmt_mutex   = &_gmt_mutexd;
+static pthread_mutex_t		_localtime_mutex = &_localtime_mutexd;
+static pthread_mutex_t		_gmtime_mutex = &_gmtime_mutexd;
+#endif
+#if defined(LINUXTHREADS)
+static pthread_mutex_t	_lcl_mutex	= PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t	_gmt_mutex	= PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t	_localtime_mutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t	_gmtime_mutex	= PTHREAD_MUTEX_INITIALIZER;
+#else
+/* Customize this based on your mutex declarations */
+static pthread_mutex_t	_lcl_mutex	= PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t	_gmt_mutex	= PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t	_localtime_mutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t	_gmtime_mutex	= PTHREAD_MUTEX_INITIALIZER;
+#endif
+extern pthread_mutex_t	*lcl_mutex;
+extern pthread_mutex_t	*gmt_mutex;
+extern pthread_mutex_t	*localtime_mutex;
+extern pthread_mutex_t	*gmtime_mutex;
+#endif
+
+/* Use the constructor attribute so this gets run before main does */
+static void _pthread_initialize(void) __attribute__((constructor));
+
+static void _pthread_initialize(void)
+{
+#if defined(LINUXTHREADS)
+	int mib[2];
+	size_t len;
+
+	len = sizeof (_posix_priority_scheduling);
+	mib[0] = CTL_P1003_1B;
+	mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING;
+	if (-1 == sysctl (mib, 2, &_posix_priority_scheduling, &len, NULL, 0))
+		_posix_priority_scheduling = 0;
+#endif
+
+	/* This turns on thread safe behaviour in libc when we link with it */
+	__isthreaded = 1;
+
+#if defined(NEWLIBC)
+	/* Set up pointers for lib/libc/stdtime/localtime.c */
+	lcl_mutex       = &_lcl_mutex;
+	gmt_mutex       = &_gmt_mutex;
+	localtime_mutex = &_localtime_mutex;
+	gmtime_mutex    = &_gmtime_mutex;
+#endif
+}
+