[t:4127] #4020 Add function toku_mempool_get_allocated_space()

git-svn-id: file:///svn/toku/tokudb@36823 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/mempool.c

@@ -97,6 +97,10 @@ size_t toku_mempool_get_free_space(struct mempool *mp) {
     return mp->size - mp->free_offset;
 }
 
+size_t toku_mempool_get_allocated_space(struct mempool *mp) {
+    return mp->free_offset;
+}
+
 void *toku_mempool_malloc(struct mempool *mp, size_t size, int alignment) {
     invariant(size < (1U<<31));
     invariant(mp->size < (1U<<31));

newbrt/mempool.h

@@ -64,6 +64,8 @@ size_t toku_mempool_get_used_space(struct mempool *mp);
 /* get the amount of space that is available for new data */
 size_t toku_mempool_get_free_space(struct mempool *mp);
 
+/* get the amount of space that has been allocated for use (wasted or not) */
+size_t toku_mempool_get_allocated_space(struct mempool *mp);
 
 /* allocate a chunk of memory from the memory pool suitably aligned */
 void *toku_mempool_malloc(struct mempool *mp, size_t size, int alignment);