1 files changed, 214 insertions, 0 deletions
diff --git a/lib/libc_r/uthread/uthread_init.c b/lib/libc_r/uthread/uthread_init.c
new file mode 100644
index 0000000..d044063
--- /dev/null
+++ b/lib/libc_r/uthread/uthread_init.c
@@ -0,0 +1,214 @@
+/*
+ * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
+ * 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.
+ *
+ */
+
+/* Allocate space for global thread variables here: */
+#define GLOBAL_PTHREAD_PRIVATE
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/time.h>
+#ifdef _THREAD_SAFE
+#include <machine/reg.h>
+#include <pthread.h>
+#include "pthread_private.h"
+
+void
+_thread_init(void)
+{
+	int             flags;
+	int             i;
+	struct sigaction act;
+
+	/* Check if this function has already been called: */
+	if (_thread_initial) {
+		/* Only initialise the threaded application once. */
+	}
+	/*
+	 * Create a pipe that is written to by the signal handler to prevent
+	 * signals being missed in calls to _thread_sys_select: 
+	 */
+	else if (_thread_sys_pipe(_thread_kern_pipe) != 0) {
+		/* Cannot create pipe, so abort: */
+		PANIC("Cannot create kernel pipe");
+	}
+	/* Get the flags for the read pipe: */
+	else if ((flags = _thread_sys_fcntl(_thread_kern_pipe[0], F_GETFL, NULL)) == -1) {
+		/* Abort this application: */
+		PANIC("Cannot get kernel read pipe flags");
+	}
+	/* Make the read pipe non-blocking: */
+	else if (_thread_sys_fcntl(_thread_kern_pipe[0], F_SETFL, flags | O_NONBLOCK) == -1) {
+		/* Abort this application: */
+		PANIC("Cannot make kernel read pipe non-blocking");
+	}
+	/* Get the flags for the write pipe: */
+	else if ((flags = _thread_sys_fcntl(_thread_kern_pipe[1], F_GETFL, NULL)) == -1) {
+		/* Abort this application: */
+		PANIC("Cannot get kernel write pipe flags");
+	}
+	/* Make the write pipe non-blocking: */
+	else if (_thread_sys_fcntl(_thread_kern_pipe[1], F_SETFL, flags | O_NONBLOCK) == -1) {
+		/* Abort this application: */
+		PANIC("Cannot get kernel write pipe flags");
+	}
+	/* Allocate memory for the thread structure of the initial thread: */
+	else if ((_thread_initial = (pthread_t) malloc(sizeof(struct pthread))) == NULL) {
+		/*
+		 * Insufficient memory to initialise this application, so
+		 * abort: 
+		 */
+		PANIC("Cannot allocate memory for initial thread");
+	} else {
+		/* Zero the global kernel thread structure: */
+		memset(&_thread_kern_thread, 0, sizeof(struct pthread));
+		memset(_thread_initial, 0, sizeof(struct pthread));
+
+		/* Default the priority of the initial thread: */
+		_thread_initial->pthread_priority = PTHREAD_DEFAULT_PRIORITY;
+
+		/* Initialise the state of the initial thread: */
+		_thread_initial->state = PS_RUNNING;
+
+		/* Initialise the queue: */
+		_thread_queue_init(&(_thread_initial->join_queue));
+
+		/* Initialise the rest of the fields: */
+		_thread_initial->parent_thread = NULL;
+		_thread_initial->specific_data = NULL;
+		_thread_initial->cleanup = NULL;
+		_thread_initial->queue = NULL;
+		_thread_initial->qnxt = NULL;
+		_thread_initial->nxt = NULL;
+		_thread_initial->flags = 0;
+		_thread_initial->error = 0;
+		_thread_link_list = _thread_initial;
+		_thread_run = _thread_initial;
+
+		/* Enter a loop to get the existing signal status: */
+		for (i = 1; i < NSIG; i++) {
+			/* Check for signals which cannot be trapped: */
+			if (i == SIGKILL || i == SIGSTOP) {
+			}
+			/* Get the signal handler details: */
+			else if (_thread_sys_sigaction(i, NULL, &act) != 0) {
+				/*
+				 * Abort this process if signal
+				 * initialisation fails: 
+				 */
+				PANIC("Cannot read signal handler info");
+			}
+			/* Set the signal handler for the initial thread: */
+			else if (sigaction(i, &act, NULL) != 0) {
+				/*
+				 * Abort this process if signal
+				 * initialisation fails: 
+				 */
+				PANIC("Cannot initialise signal handler for initial thread");
+			}
+		}
+
+		/* Initialise the global signal action structure: */
+		sigfillset(&act.sa_mask);
+		act.sa_handler = (void (*) ()) _thread_sig_handler;
+		act.sa_flags = SA_RESTART;
+
+		/* Enter a loop to initialise the rest of the signals: */
+		for (i = 1; i < NSIG; i++) {
+			/* Check for signals which cannot be trapped: */
+			if (i == SIGKILL || i == SIGSTOP) {
+			}
+			/* Initialise the signal for default handling: */
+			else if (_thread_sys_sigaction(i, &act, NULL) != 0) {
+				/*
+				 * Abort this process if signal
+				 * initialisation fails: 
+				 */
+				PANIC("Cannot initialise signal handler");
+			}
+		}
+
+		/* Get the table size: */
+		if ((_thread_dtablesize = getdtablesize()) < 0) {
+			/*
+			 * Cannot get the system defined table size, so abort
+			 * this process. 
+			 */
+			PANIC("Cannot get dtablesize");
+		}
+		/* Allocate memory for the file descriptor table: */
+		if ((_thread_fd_table = (struct fd_table_entry **) malloc(sizeof(struct fd_table_entry) * _thread_dtablesize)) == NULL) {
+			/*
+			 * Cannot allocate memory for the file descriptor
+			 * table, so abort this process. 
+			 */
+			PANIC("Cannot allocate memory for file descriptor table");
+		} else {
+			/*
+			 * Enter a loop to initialise the file descriptor
+			 * table: 
+			 */
+			for (i = 0; i < _thread_dtablesize; i++) {
+				/* Initialise the file descriptor table: */
+				_thread_fd_table[i] = NULL;
+			}
+		}
+	}
+	return;
+}
+
+/*
+ * Special start up code for NetBSD/Alpha 
+ */
+#if	defined(__NetBSD__) && defined(__alpha__)
+int 
+main(int argc, char *argv[], char *env);
+
+int
+_thread_main(int argc, char *argv[], char *env)
+{
+	_thread_init();
+	return (main(argc, argv, env));
+}
+#endif
+#else
+/*
+ * A stub for non-threaded programs.
+ */
+void
+_thread_init(void)
+{
+}
+#endif