initial code repo

[stor4nfv.git] / src / ceph / src / os / bluestore / StupidAllocator.h

diff --git a/src/ceph/src/os/bluestore/StupidAllocator.h b/src/ceph/src/os/bluestore/StupidAllocator.h
new file mode 100644 (file)
index 0000000..431c636
--- /dev/null
+++ b/src/ceph/src/os/bluestore/StupidAllocator.h
@@ -0,0 +1,62 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_OS_BLUESTORE_STUPIDALLOCATOR_H
+#define CEPH_OS_BLUESTORE_STUPIDALLOCATOR_H
+
+#include <mutex>
+
+#include "Allocator.h"
+#include "include/btree_interval_set.h"
+#include "os/bluestore/bluestore_types.h"
+#include "include/mempool.h"
+
+class StupidAllocator : public Allocator {
+  CephContext* cct;
+  std::mutex lock;
+
+  int64_t num_free;     ///< total bytes in freelist
+  int64_t num_reserved; ///< reserved bytes
+
+  typedef mempool::bluestore_alloc::pool_allocator<
+    pair<const uint64_t,uint64_t>> allocator;
+  std::vector<btree_interval_set<uint64_t,allocator>> free;  ///< leading-edge copy
+
+  uint64_t last_alloc;
+
+  unsigned _choose_bin(uint64_t len);
+  void _insert_free(uint64_t offset, uint64_t len);
+
+  uint64_t _aligned_len(
+    btree_interval_set<uint64_t,allocator>::iterator p,
+    uint64_t alloc_unit);
+
+public:
+  StupidAllocator(CephContext* cct);
+  ~StupidAllocator() override;
+
+  int reserve(uint64_t need) override;
+  void unreserve(uint64_t unused) override;
+
+  int64_t allocate(
+    uint64_t want_size, uint64_t alloc_unit, uint64_t max_alloc_size,
+    int64_t hint, mempool::bluestore_alloc::vector<AllocExtent> *extents) override;
+
+  int64_t allocate_int(
+    uint64_t want_size, uint64_t alloc_unit, int64_t hint,
+    uint64_t *offset, uint32_t *length);
+
+  void release(
+    uint64_t offset, uint64_t length) override;
+
+  uint64_t get_free() override;
+
+  void dump() override;
+
+  void init_add_free(uint64_t offset, uint64_t length) override;
+  void init_rm_free(uint64_t offset, uint64_t length) override;
+
+  void shutdown() override;
+};
+
+#endif