initial code repo

[stor4nfv.git] / src / ceph / src / compressor / zlib / CompressionPluginZlib.h

diff --git a/src/ceph/src/compressor/zlib/CompressionPluginZlib.h b/src/ceph/src/compressor/zlib/CompressionPluginZlib.h
new file mode 100644 (file)
index 0000000..4515f2b
--- /dev/null
+++ b/src/ceph/src/compressor/zlib/CompressionPluginZlib.h
@@ -0,0 +1,55 @@
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2015 Mirantis, Inc.
+ *
+ * Author: Alyona Kiseleva <akiselyova@mirantis.com>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ */
+
+#ifndef CEPH_COMPRESSION_PLUGIN_ZLIB_H
+#define CEPH_COMPRESSION_PLUGIN_ZLIB_H
+
+// -----------------------------------------------------------------------------
+#include "arch/probe.h"
+#include "arch/intel.h"
+#include "arch/arm.h"
+#include "common/config.h"
+#include "compressor/CompressionPlugin.h"
+#include "ZlibCompressor.h"
+
+// -----------------------------------------------------------------------------
+
+class CompressionPluginZlib : public CompressionPlugin {
+public:
+  bool has_isal = false;
+
+  explicit CompressionPluginZlib(CephContext *cct) : CompressionPlugin(cct)
+  {}
+
+  int factory(CompressorRef *cs,
+                      std::ostream *ss) override
+  {
+    bool isal = false;
+#if defined(__i386__) || defined(__x86_64__)
+    // other arches or lack of support result in isal = false
+    if (cct->_conf->compressor_zlib_isal) {
+      ceph_arch_probe();
+      isal = (ceph_arch_intel_pclmul && ceph_arch_intel_sse41);
+    }
+#endif
+    if (compressor == 0 || has_isal != isal) {
+      compressor = std::make_shared<ZlibCompressor>(cct, isal);
+      has_isal = isal;
+    }
+    *cs = compressor;
+    return 0;
+  }
+};
+
+#endif