1 files changed, 106 insertions, 0 deletions
diff --git a/lib/libpthread/thread/thr_sigmask.c b/lib/libpthread/thread/thr_sigmask.c
new file mode 100644
index 0000000..040e7aa
--- /dev/null
+++ b/lib/libpthread/thread/thr_sigmask.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 1997 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/signalvar.h>
+#include <errno.h>
+#include <signal.h>
+#include <pthread.h>
+#include "pthread_private.h"
+
+__weak_reference(_pthread_sigmask, pthread_sigmask);
+
+int
+_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
+{
+	struct pthread	*curthread = _get_curthread();
+	sigset_t	sigset;
+	int		ret = 0;
+
+	/* Check if the existing signal process mask is to be returned: */
+	if (oset != NULL) {
+		/* Return the current mask: */
+		*oset = curthread->sigmask;
+	}
+	/* Check if a new signal set was provided by the caller: */
+	if (set != NULL) {
+		/* Process according to what to do: */
+		switch (how) {
+		/* Block signals: */
+		case SIG_BLOCK:
+			/* Add signals to the existing mask: */
+			SIGSETOR(curthread->sigmask, *set);
+			break;
+
+		/* Unblock signals: */
+		case SIG_UNBLOCK:
+			/* Clear signals from the existing mask: */
+			SIGSETNAND(curthread->sigmask, *set);
+			break;
+
+		/* Set the signal process mask: */
+		case SIG_SETMASK:
+			/* Set the new mask: */
+			curthread->sigmask = *set;
+			break;
+
+		/* Trap invalid actions: */
+		default:
+			/* Return an invalid argument: */
+			errno = EINVAL;
+			ret = -1;
+			break;
+		}
+
+		/* Increment the sequence number: */
+		curthread->sigmask_seqno++;
+
+		/*
+		 * Check if there are pending signals for the running
+		 * thread or process that aren't blocked:
+		 */
+		sigset = curthread->sigpend;
+		SIGSETOR(sigset, _process_sigpending);
+		SIGSETNAND(sigset, curthread->sigmask);
+		if (SIGNOTEMPTY(sigset))
+			/*
+			 * Call the kernel scheduler which will safely
+			 * install a signal frame for the running thread:
+			 */
+			_thread_kern_sched_sig();
+	}
+
+	/* Return the completion status: */
+	return (ret);
+}