Add interfaces to support un-initializing a granule allocator.

include/nuttx/gran.h

@@ -148,6 +148,27 @@ GRAN_HANDLE gran_initialize(FAR void *heapstart, size_t heapsize,
                             uint8_t log2gran, uint8_t log2align);
 #endif
 
+/****************************************************************************
+ * Name: gran_release
+ *
+ * Description:
+ *   Uninitialize a gram memory allocator and release resources held by the
+ *   allocator.
+ *
+ * Input Parameters:
+ *   handle - The handle previously returned by gran_initialize
+ *
+ * Returned Value:
+ *   None.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_GRAN_SINGLE
+void gran_release(void);
+#else
+void gran_release(GRAN_HANDLE handle);
+#endif
+
 /****************************************************************************
  * Name: gran_reserve
  *

mm/mm_gran/mm_granrelease.c

@@ -0,0 +1,123 @@
+/****************************************************************************
+ * mm/mm_gran/mm_graninit.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 <errno.h>
+
+#include <nuttx/gran.h>
+#include <nuttx/kmalloc.h>
+
+#include "mm_gran/mm_gran.h"
+
+#ifdef CONFIG_GRAN
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/* State of the single GRAN allocator */
+
+#ifdef CONFIG_GRAN_SINGLE
+FAR struct gran_s *g_graninfo;
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: gran_release_common
+ *
+ * Description:
+ *   Perform common GRAN initialization.
+ *
+ * Input Parameters:
+ *   priv - Reference to the granule heap structure to be released.
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+static inline void gran_release_common(FAR struct gran_s *priv)
+{
+  DEBUGASSERT(priv);
+  sem_destroy(&priv->exclsem);
+  kmm_free(priv);
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: gran_release
+ *
+ * Description:
+ *   Uninitialize a gram memory allocator and release resources held by the
+ *   allocator.
+ *
+ * Input Parameters:
+ *   handle - The handle previously returned by gran_initialize
+ *
+ * Returned Value:
+ *   None.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_GRAN_SINGLE
+void gran_release(void)
+{
+  gran_release_common(g_graninfo);
+  g_graninfo = NULL;
+}
+#else
+void gran_release(GRAN_HANDLE handle)
+{
+  gran_release_common(handle);
+}
+#endif
+
+#endif /* CONFIG_GRAN */