Adding a copy of memcached to the tree.

[awesomized/libmemcached] / memcached / slabs.h

diff --git a/memcached/slabs.h b/memcached/slabs.h
new file mode 100644 (file)
index 0000000..90e2bd8
--- /dev/null
+++ b/memcached/slabs.h
@@ -0,0 +1,49 @@
+/* slabs memory allocation */
+#ifndef SLABS_H
+#define SLABS_H
+
+/** Init the subsystem. 1st argument is the limit on no. of bytes to allocate,
+    0 if no limit. 2nd argument is the growth factor; each slab will use a chunk
+    size equal to the previous slab's chunk size times this factor.
+    3rd argument specifies if the slab allocator should allocate all memory
+    up front (if true), or allocate memory in chunks as it is needed (if false)
+*/
+void slabs_init(const size_t limit, const double factor, const bool prealloc);
+
+
+/**
+ * Given object size, return id to use when allocating/freeing memory for object
+ * 0 means error: can't store such a large object
+ */
+
+#ifndef __INTEL_COMPILER
+#pragma GCC diagnostic ignored "-Wshadow"
+#endif
+unsigned int slabs_clsid(const size_t size);
+
+/** Allocate object of given length. 0 on error */ /*@null@*/
+void *slabs_alloc(const size_t size, unsigned int id);
+
+/** Free previously allocated object */
+void slabs_free(void *ptr, size_t size, unsigned int id);
+
+/** Adjust the stats for memory requested */
+void slabs_adjust_mem_requested(unsigned int id, size_t old, size_t ntotal);
+
+/** Return a datum for stats in binary protocol */
+bool get_stats(const char *stat_type, int nkey, ADD_STAT add_stats, void *c);
+
+/** Fill buffer with stats */ /*@null@*/
+void slabs_stats(ADD_STAT add_stats, void *c);
+
+int start_slab_maintenance_thread(void);
+void stop_slab_maintenance_thread(void);
+
+enum reassign_result_type {
+    REASSIGN_OK=0, REASSIGN_RUNNING, REASSIGN_BADCLASS, REASSIGN_NOSPARE,
+    REASSIGN_DEST_NOT_FULL, REASSIGN_SRC_NOT_SAFE, REASSIGN_SRC_DST_SAME
+};
+
+enum reassign_result_type slabs_reassign(int src, int dst);
+
+#endif