1 files changed, 91 insertions, 0 deletions
diff --git a/nuttx/mm/mm_addfreechunk.c b/nuttx/mm/mm_addfreechunk.c
new file mode 100644
index 000000000..f59b9f59e
--- /dev/null
+++ b/nuttx/mm/mm_addfreechunk.c
@@ -0,0 +1,91 @@
+/************************************************************
+ * mm_addfreechunk.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 "mm_environment.h"
+#include "mm_internal.h"
+
+/************************************************************
+ * Definitions
+ ************************************************************/
+
+/************************************************************
+ * Private Functions
+ ************************************************************/
+
+/************************************************************
+ * Global Functions
+ ************************************************************/
+
+/************************************************************
+ * mm_addfreechunk
+ *
+ * Description:
+ *   Add a free chunk to the node next
+ *   It is assumed that the caller holds the mm semaphore
+ *
+ ************************************************************/
+
+void mm_addfreechunk(struct mm_freenode_s *node)
+{
+  struct mm_freenode_s *next;
+  struct mm_freenode_s *prev;
+
+  /* Convert the size to a nodelist index */
+
+  int ndx = mm_size2ndx(node->size);
+
+  /* Now put the new node int the next */
+
+  for (prev = &g_nodelist[ndx], next = g_nodelist[ndx].flink;
+       next && next->size && next->size < node->size;
+       prev = next, next = next->flink);
+
+  /* Does it go in mid next or at the end? */
+
+  prev->flink = node;
+  node->blink = prev;
+  node->flink = next;
+
+  if (next)
+    {
+      /* The new node goes between prev and next */
+
+      next->blink = node;
+    }
+}