1 files changed, 128 insertions, 0 deletions
diff --git a/nuttx/sched/sig_mqnotempty.c b/nuttx/sched/sig_mqnotempty.c
new file mode 100644
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+++ b/nuttx/sched/sig_mqnotempty.c
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+/****************************************************************************
+ * sched/sig_mqnotempty.c
+ *
+ *   Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 NuttX 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 <nuttx/config.h>
+#include <nuttx/compiler.h>
+
+#include <signal.h>
+#include <sched.h>
+#include <debug.h>
+
+#include "os_internal.h"
+#include "sig_internal.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functionss
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sig_mqnotempty
+ *
+ * Description:
+ *   This function is equivalent to sigqueue(), but supports the messaging
+ *   system's requirement to signal a task when a message queue becomes
+ *   non-empty.  It is identical to sigqueue(), except that it sets the
+ *   si_code field in the siginfo structure to SI_MESGQ rather than SI_QUEUE.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_CAN_PASS_STRUCTS
+int sig_mqnotempty (int pid, int signo, union sigval value)
+#else
+int sig_mqnotempty (int pid, int signo, void *sival_ptr)
+#endif
+{
+  FAR _TCB *stcb;
+  siginfo_t info;
+  int       ret = ERROR;
+
+  sched_lock();
+
+  /* Get the TCB of the receiving task */
+
+  stcb = sched_gettcb(pid);
+
+#ifdef CONFIG_CAN_PASS_STRUCTS
+  sdbg("TCB=%p signo=%d value=%d\n", stcb, signo, value.sival_int);
+#else
+  sdbg("TCB=%p signo=%d sival_ptr=%p\n", stcb, signo, sival_ptr);
+#endif
+
+  /* Create the siginfo structure */
+
+  info.si_signo           = signo;
+  info.si_code            = SI_MESGQ;
+#ifdef CONFIG_CAN_PASS_STRUCTS
+  info.si_value           = value;
+#else
+  info.si_value.sival_ptr = sival_ptr;
+#endif
+
+  /* Verify that we can perform the signalling operation */
+
+  if ((stcb) && (GOOD_SIGNO(signo)))
+    {
+      /* Process the receipt of the signal */
+
+      ret = sig_received(stcb, &info);
+    }
+
+  sched_unlock();
+  return ret;
+}