diff options
Diffstat (limited to 'nuttx/mm/mm_mallinfo.c')
-rw-r--r-- | nuttx/mm/mm_mallinfo.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/nuttx/mm/mm_mallinfo.c b/nuttx/mm/mm_mallinfo.c new file mode 100644 index 000000000..b725535d1 --- /dev/null +++ b/nuttx/mm/mm_mallinfo.c @@ -0,0 +1,146 @@ +/**************************************************************************** + * mm/mm_mallinfo.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 <assert.h> + +#include "mm_environment.h" +#include "mm_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: mallinfo + * + * Description: + * mallinfo returns a copy of updated current mallinfo. + * + ****************************************************************************/ + +#ifdef CONFIG_CAN_PASS_STRUCTS +struct mallinfo mallinfo(void) +#else +int mallinfo(struct mallinfo *info) +#endif +{ + struct mm_allocnode_s *node; + size_t mxordblk = 0; + int ordblks = 0; /* Number of non-inuse chunks */ + size_t uordblks = 0; /* Total allocated space */ + size_t fordblks = 0; /* Total non-inuse space */ +#if CONFIG_MM_REGIONS > 1 + int region; +#else +# define region 0 +#endif + +#ifdef CONFIG_CAN_PASS_STRUCTS + static struct mallinfo info; +#else + if (!info) + { + return ERROR; + } +#endif + + /* Visit each region */ + +#if CONFIG_MM_REGIONS > 1 + for (region = 0; region < g_nregions; region++) +#endif + { + /* Visit each node in the region */ + + for (node = g_heapstart[region]; + node < g_heapend[region]; + node = (struct mm_allocnode_s *)((char*)node + node->size)) + { + mvdbg("region=%d node=%p preceding=%p\n", region, node, node->preceding); + if (node->preceding & MM_ALLOC_BIT) + { + uordblks += node->size; + } + else + { + ordblks++; + fordblks += node->size; + if (node->size > mxordblk) + { + mxordblk = node->size; + } + } + } + + mvdbg("region=%d node=%p g_heapend=%p\n", region, node, g_heapend[region]); + DEBUGASSERT(node == g_heapend[region]); + uordblks += SIZEOF_MM_ALLOCNODE; /* account for the tail node */ + } +#undef region + + DEBUGASSERT(uordblks + fordblks == g_heapsize); + +#ifdef CONFIG_CAN_PASS_STRUCTS + info.arena = g_heapsize; + info.ordblks = ordblks; + info.mxordblk = mxordblk; + info.uordblks = uordblks; + info.fordblks = fordblks; + return info; +#else + info->arena = g_heapsize; + info->ordblks = ordblks; + info->mxordblk = mxordblk; + info->uordblks = uordblks; + info->fordblks = fordblks; + return OK; +#endif +} |