diff options
Diffstat (limited to 'nuttx/mm/mm_mallinfo.c')
-rw-r--r-- | nuttx/mm/mm_mallinfo.c | 108 |
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; +} |