diff options
Diffstat (limited to 'nuttx/mm/mm_granfree.c')
| -rw-r--r-- | nuttx/mm/mm_granfree.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/nuttx/mm/mm_granfree.c b/nuttx/mm/mm_granfree.c deleted file mode 100644 index fcab11af9..000000000 --- a/nuttx/mm/mm_granfree.c +++ /dev/null @@ -1,170 +0,0 @@ -/**************************************************************************** - * mm/mm_granfree.c - * - * Copyright (C) 2012 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 <assert.h> - -#include <nuttx/gran.h> - -#include "mm_gran.h" - -#ifdef CONFIG_GRAN - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Name: gran_common_free - * - * Description: - * Return memory to the granule heap. - * - * Input Parameters: - * handle - The handle previously returned by gran_initialize - * memory - A pointer to memory previoiusly allocated by gran_alloc. - * - * Returned Value: - * None - * - ****************************************************************************/ - -static inline void gran_common_free(FAR struct gran_s *priv, - FAR void *memory, size_t size) -{ - unsigned int granno; - unsigned int gatidx; - unsigned int gatbit; - unsigned int granmask; - unsigned int ngranules; - unsigned int avail; - uint32_t gatmask; - - DEBUGASSERT(priv && memory && size <= 32 * (1 << priv->log2gran)); - - /* Get exclusive access to the GAT */ - - gran_enter_critical(priv); - - /* Determine the granule number of the first granule in the allocation */ - - granno = ((uintptr_t)memory - priv->heapstart) >> priv->log2gran; - - /* Determine the GAT table index and bit number associated with the - * allocation. - */ - - gatidx = granno >> 5; - gatbit = granno & 31; - - /* Determine the number of granules in the allocation */ - - granmask = (1 << priv->log2gran) - 1; - ngranules = (size + granmask) >> priv->log2gran; - - /* Clear bits in the GAT entry or entries */ - - avail = 32 - gatbit; - if (ngranules > avail) - { - /* Clear bits in the first GAT entry */ - - gatmask = (0xffffffff << gatbit); - DEBUGASSERT((priv->gat[gatidx] & gatmask) == gatmask); - - priv->gat[gatidx] &= ~gatmask; - ngranules -= avail; - - /* Clear bits in the second GAT entry */ - - gatmask = 0xffffffff >> (32 - ngranules); - DEBUGASSERT((priv->gat[gatidx+1] & gatmask) == gatmask); - - priv->gat[gatidx+1] &= ~gatmask; - } - - /* Handle the case where where all of the granules came from one entry */ - - else - { - /* Clear bits in a single GAT entry */ - - gatmask = 0xffffffff >> (32 - ngranules); - gatmask <<= gatbit; - DEBUGASSERT((priv->gat[gatidx] & gatmask) == gatmask); - - priv->gat[gatidx] &= ~gatmask; - } - - gran_leave_critical(priv); -} - -/**************************************************************************** - * Global Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: gran_free - * - * Description: - * Return memory to the granule heap. - * - * Input Parameters: - * handle - The handle previously returned by gran_initialize - * memory - A pointer to memory previoiusly allocated by gran_alloc. - * - * Returned Value: - * None - * - ****************************************************************************/ - -#ifdef CONFIG_GRAN_SINGLE -void gran_free(FAR void *memory, size_t size) -{ - return gran_common_free(g_graninfo, memory, size); -} -#else -void gran_free(GRAN_HANDLE handle, FAR void *memory, size_t size) -{ - return gran_common_free((FAR struct gran_s *)handle, memory, size); -} -#endif - -#endif /* CONFIG_GRAN */ |