NuttX RTOS

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 128 insertions, 0 deletions

diff --git a/nuttx/sched/sig_pending.c b/nuttx/sched/sig_pending.c
new file mode 100644
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+/************************************************************
+ * sig_pending.c
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ ************************************************************/
+
+/************************************************************
+ * Included Files
+ ************************************************************/
+
+#include <sys/types.h>
+#include <signal.h>
+#include <sched.h>
+#include "os_internal.h"
+#include "sig_internal.h"
+
+/************************************************************
+ * Definitions
+ ************************************************************/
+
+/************************************************************
+ * Private Type Declarations
+ ************************************************************/
+
+/************************************************************
+ * Global Variables
+ ************************************************************/
+
+/************************************************************
+ * Private Variables
+ ************************************************************/
+
+/************************************************************
+ * Private Function Prototypes
+ ************************************************************/
+
+/************************************************************
+ * Public Functions
+ ************************************************************/
+
+/************************************************************
+ * Function: sigpending
+ *
+ * Description:
+ *   This function stores the returns the set of signals that
+ *   are blocked for delivery and that are pending for the
+ *   calling process in the space pointed to by set.
+ * 
+ * Parameters:
+ *   set - The location to return the pending signal set.
+ *
+ * Return Value:
+ *   0 (OK) or -1 (ERROR)
+ *
+ * Assumptions:
+ *
+ ************************************************************/
+
+int sigpending(sigset_t *set)
+{
+  _TCB *rtcb = (_TCB*)g_readytorun.head;
+  int   ret = ERROR;
+
+  if (set)
+    {
+      *set = sig_pendingset(rtcb);
+      ret = OK;
+   }
+
+  return ret;
+}
+
+/************************************************************
+ * Function: sig_pendingset
+ *
+ * Description:
+ *   Convert the list of pending signals into a signal set
+ ************************************************************/
+
+sigset_t sig_pendingset(_TCB *stcb)
+{
+  sigset_t    sigpendset;
+  sigpendq_t *sigpend;
+  uint32      saved_state;
+
+  sigpendset = NULL_SIGNAL_SET;
+
+  saved_state = irqsave();
+  for (sigpend = (sigpendq_t*)stcb->sigpendingq.head;
+       (sigpend); sigpend = sigpend->flink)
+    {
+      sigaddset(&sigpendset, sigpend->info.si_signo);
+    }
+  irqrestore(saved_state);
+
+  return sigpendset;
+}
+
+