experimental threaded libc - kernel only

1 files changed, 88 insertions, 0 deletions

diff --git a/lib/libc_r/uthread/uthread_sigprocmask.c b/lib/libc_r/uthread/uthread_sigprocmask.c
new file mode 100644
index 00000000000..81b602f581c
--- /dev/null
+++ b/lib/libc_r/uthread/uthread_sigprocmask.c
@@ -0,0 +1,88 @@
+/*
+ * 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.
+ *
+ */
+#include <signal.h>
+#include <errno.h>
+#ifdef _THREAD_SAFE
+#include <pthread.h>
+#include "pthread_private.h"
+
+int
+sigprocmask(int how, const sigset_t * set, sigset_t * oset)
+{
+	int ret = 0;
+
+	/* Check if the existing signal process mask is to be returned: */
+	if (oset != NULL) {
+		/* Return the current mask: */
+		*oset = _thread_run->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: */
+			_thread_run->sigmask |= *set;
+			break;
+
+		/* Unblock signals: */
+		case SIG_UNBLOCK:
+			/* Clear signals from the existing mask: */
+			_thread_run->sigmask &= ~(*set);
+			break;
+
+		/* Set the signal process mask: */
+		case SIG_SETMASK:
+			/* Set the new mask: */
+			_thread_run->sigmask = *set;
+			break;
+
+		/* Trap invalid actions: */
+		default:
+			/* Return an invalid argument: */
+			errno = EINVAL;
+			ret = -1;
+			break;
+		}
+
+		/*
+		 * Dispatch signals to the running thread that are pending
+		 * and now unblocked:
+		 */
+		_dispatch_signals();
+	}
+	/* Return the completion status: */
+	return (ret);
+}
+#endif