Fixes for granule allocator

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@5131 7fd9a85b-ad96-42d3-883c-3090e2eb8679

1 files changed, 20 insertions, 0 deletions

diff --git a/nuttx/mm/mm_gran.h b/nuttx/mm/mm_gran.h
index d8a334e29..4a76397c8 100644
--- a/nuttx/mm/mm_gran.h
+++ b/nuttx/mm/mm_gran.h
@@ -43,6 +43,7 @@
 #include <nuttx/config.h>
 
 #include <stdint.h>
+#include <semaphore.h>
 
 #include <nuttx/gran.h>
 
@@ -87,6 +88,7 @@ struct gran_s
 {
   uint8_t    log2gran;  /* Log base 2 of the size of one granule */
   uint16_t   ngranules; /* The total number of (aligned) granules in the heap */
+  sem_t      exclsem;   /* For exclusive access to the GAT */
   uintptr_t  heapstart; /* The aligned start of the granule heap */
   uint32_t   gat[1];    /* Start of the granule allocation table */
 };
@@ -105,4 +107,22 @@ extern FAR struct gran_s *g_graninfo;
  * Public Function Prototypes
  ****************************************************************************/
 
+/****************************************************************************
+ * Name: gran_semtake and gran_semgive
+ *
+ * Description:
+ *   Managed semaphore for the granule allocator.  gran_semgive is
+ *   implemented as a macro.
+ *
+ * Input Parameters:
+ *   priv - Pointer to the gran state
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void gran_semtake(FAR struct gran_s *priv);
+#define gran_semgive(p) sem_post(&(p)->exclsem);
+
 #endif /* __MM_MM_GRAN_H */