NuttX RTOS

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

1 files changed, 108 insertions, 0 deletions

diff --git a/nuttx/mm/mm_mallinfo.c b/nuttx/mm/mm_mallinfo.c
new file mode 100644
index 000000000..7b242b4ea
--- /dev/null
+++ b/nuttx/mm/mm_mallinfo.c
@@ -0,0 +1,108 @@
+/************************************************************
+ * mm_mallinfo.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 <assert.h>
+#include "mm_environment.h"
+#include "mm_internal.h"
+
+/************************************************************
+ * Definitions
+ ************************************************************/
+
+/************************************************************
+ * Private Data
+ ************************************************************/
+
+/************************************************************
+ * Private Functions
+ ************************************************************/
+
+/************************************************************
+ * Public Functions
+ ************************************************************/
+
+/************************************************************
+ * mallinfo
+ *
+ * Description:
+ *   mallinfo returns a copy of updated current mallinfo.
+ *
+ ************************************************************/
+
+struct mallinfo mallinfo(void)
+{
+  static struct mallinfo stats;
+  struct mm_allocnode_s *node;
+  uint32 mxordblk = 0; 
+  int    ordblks  = 0;  /* Number of non-inuse chunks */
+  uint32 uordblks = 0;  /* Total allocated space */
+  uint32 fordblks = 0;  /* Total non-inuse space */
+
+  /* Visit each node in physical memory */
+
+  for (node = g_heapstart;
+       node < g_heapend;
+       node = (struct mm_allocnode_s *)((char*)node + node->size))
+    {
+      if (node->preceding & MM_ALLOC_BIT)
+        {
+          uordblks += node->size;
+        }
+      else
+        {
+          ordblks++;
+          fordblks += node->size;
+          if (node->size > mxordblk)
+            {
+              mxordblk = node->size;
+            }
+        }
+    }
+
+  DEBUGASSERT(node == g_heapend);
+  uordblks += SIZEOF_MM_ALLOCNODE; /* account for the tail node */
+  DEBUGASSERT(uordblks + fordblks == g_heapsize);
+
+  stats.arena    = g_heapsize;
+  stats.ordblks  = ordblks;
+  stats.mxordblk = mxordblk;
+  stats.uordblks = uordblks;
+  stats.fordblks = fordblks;
+  return stats;
+}