1 files changed, 137 insertions, 0 deletions
diff --git a/nuttx/sched/sig_allocatependingsigaction.c b/nuttx/sched/sig_allocatependingsigaction.c
new file mode 100644
index 000000000..15d6470ca
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+++ b/nuttx/sched/sig_allocatependingsigaction.c
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+/************************************************************************
+ * sched/sig_allocatependingsigaction.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 <signal.h>
+#include <assert.h>
+#include <nuttx/arch.h>
+
+#include "os_internal.h"
+#include "sig_internal.h"
+
+/************************************************************************
+ * Definitions
+ ************************************************************************/
+
+/************************************************************************
+ * Private Type Declarations
+ ************************************************************************/
+
+/************************************************************************
+ * Global Variables
+ ************************************************************************/
+
+/************************************************************************
+ * Private Variables
+ ************************************************************************/
+
+/************************************************************************
+ * Private Function Prototypes
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Name: sig_allocatependingsigaction
+ *
+ * Description:
+ *   Allocate a new element for the pending signal action queue
+ *
+ ************************************************************************/
+
+FAR sigq_t *sig_allocatependingsigaction(void)
+{
+  FAR sigq_t    *sigq;
+  irqstate_t saved_state;
+
+  /* Check if we were called from an interrupt handler. */
+
+  if (up_interrupt_context())
+    {
+      /* Try to get the pending signal action structure from the free list */
+
+      sigq = (FAR sigq_t*)sq_remfirst(&g_sigpendingaction);
+
+      /* If so, then try the special list of structures reserved for
+       * interrupt handlers
+       */
+
+      if (!sigq)
+        {
+          sigq = (FAR sigq_t*)sq_remfirst(&g_sigpendingirqaction);
+        }
+    }
+
+  /* If we were not called from an interrupt handler, then we are
+   * free to allocate pending signal action structures if necessary. */
+
+  else
+    {
+      /* Try to get the pending signal action structure from the free list */
+
+      saved_state = irqsave();
+      sigq = (FAR sigq_t*)sq_remfirst(&g_sigpendingaction);
+      irqrestore(saved_state);
+
+      /* Check if we got one. */
+
+      if (!sigq)
+        {
+          /* No...Try the resource pool */
+
+          if (!sigq)
+            {
+              sigq = (FAR sigq_t *)kmalloc((sizeof (sigq_t)));
+            }
+
+          /* Check if we got an allocated message */
+
+          if (sigq)
+            {
+              sigq->type = SIG_ALLOC_DYN;
+            }
+        }
+    }
+
+  return sigq;
+}
+