Neaten up the libpthread directory.

1 files changed, 121 insertions, 0 deletions

diff --git a/libpthread/linuxthreads/pthread.c-OLDEXAMPLE b/libpthread/linuxthreads/pthread.c-OLDEXAMPLE
new file mode 100644
index 000000000..88b163087
--- /dev/null
+++ b/libpthread/linuxthreads/pthread.c-OLDEXAMPLE
@@ -0,0 +1,121 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * A _very_ simple clone based pthread-like implementation
+ *
+ * Copyright (C) 2001,2002 by Erik Andersen <andersee@debian.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program 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 Library General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdlib.h>
+#include <sched.h>
+#include <signal.h>
+#include <errno.h>
+#include <unistd.h>
+#include <pthread.h>
+
+#define STACKSIZE 8096
+
+#define CSIGNAL         0x000000ff      /* signal mask to be sent at exit */
+#define CLONE_VM        0x00000100      /* set if VM shared between processes */
+#define CLONE_FS        0x00000200      /* set if fs info shared between proces ses */
+#define CLONE_FILES     0x00000400      /* set if open files shared between pro cesses */
+#define CLONE_SIGHAND   0x00000800      /* set if signal handlers shared */
+
+
+
+/* Lame home-grown clone based threading */
+int pthread_mutex_init (pthread_mutex_t *mutex, const pthread_mutexattr_t *mutex_attr)
+{
+    mutex->__m_lock.__spinlock = 1;
+	return 0;
+}
+
+int pthread_mutex_lock (pthread_mutex_t *mutex)
+{
+	while (mutex->__m_lock.__spinlock == 0) {
+		usleep(10000);
+	}
+	--(mutex->__m_lock.__spinlock);
+	return 0;
+}
+
+int pthread_mutex_unlock (pthread_mutex_t *mutex)
+{
+    ++(mutex->__m_lock.__spinlock);
+	return 0;
+}
+
+int pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex)
+{
+	++(mutex->__m_lock.__spinlock);
+	while (cond->__c_lock.__spinlock == 0) {
+		usleep(10000);
+	}
+	--(cond->__c_lock.__spinlock);
+	return 0;
+}
+
+int pthread_cond_signal(pthread_cond_t *cond)
+{
+    ++(cond->__c_lock.__spinlock);
+	return 0;
+}
+
+int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *cond_attr)
+{
+    cond->__c_lock.__spinlock = 1;
+	return 0;
+}
+
+int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void* (*fn)(void *), void *data)
+{
+	long retval;
+	void **newstack;
+	int (*clonefunc)(void *) = (int (*)(void *))(fn);
+
+	newstack = (void **) malloc(STACKSIZE);
+	if (!newstack)
+		return -1;
+	newstack = (void **) (STACKSIZE + (char *) newstack);
+	*--newstack = data;
+	retval = clone(clonefunc, newstack, 
+			CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | SIGCHLD, data);  
+	if (retval < 0) {
+		errno = -retval;
+		*thread = 0;
+		retval = -1;
+	} else {
+		*thread = retval;
+		retval = 0;
+	}
+	return retval;
+}
+
+int pthread_join (pthread_t thread, void **thread_return)
+{
+	int retval;
+	/* Fixme -- wait for thread and get its return value */
+	retval = EXIT_SUCCESS;
+	if (thread_return)
+		(int)*thread_return = retval;
+	_exit(retval);
+}
+link_warning(pthread_join, "pthread_join is a stub and does not behave properly");
+
+void pthread_exit (void *retval)
+{
+	_exit(*(int *)retval);
+}