Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 73 insertions, 0 deletions

diff --git a/src/include/libcephsqlite.h b/src/include/libcephsqlite.h
new file mode 100644
index 000000000..d81cc55e8
--- /dev/null
+++ b/src/include/libcephsqlite.h
@@ -0,0 +1,73 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2021 Red Hat, Inc.
+ *
+ * This is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License version 2.1, as published by
+ * the Free Software Foundation.  See file COPYING.
+ *
+ */
+
+#ifndef LIBCEPHSQLITE_H
+#define LIBCEPHSQLITE_H
+
+/* This loadable extension does not generally require using this header. It is
+ * here to allow controlling which version of the library is linked in. See
+ * also sqlite3_cephsqlite_init below. Additionally, you may specify which
+ * CephContext to use rather than the library instantiating its own and using
+ * whatever the default credential is.
+ */
+
+#include <sqlite3.h>
+
+#ifdef _WIN32
+#  define LIBCEPHSQLITE_API __declspec(dllexport)
+#else
+#  define LIBCEPHSQLITE_API [[gnu::visibility("default")]]
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+/* This is the SQLite entry point when loaded as a dynamic library. You also
+ * need to ensure SQLite calls this method when using libcephsqlite as a static
+ * library or a dynamic library linked at compile time. For the latter case,
+ * you can do this by:
+ *
+ *   sqlite3_auto_extension((void (*)())sqlite3_cephsqlite_init);
+ *   sqlite3* db = nullptr;
+ *   int rc = sqlite3_open_v2(":memory:", &db, SQLITE_OPEN_READWRITE, nullptr);
+ *   if (rc == SQLITE_DONE) {
+ *     sqlite3_close(db);
+ *   } else {
+ *     // failure
+ *   }
+ *
+ * The throwaway database created (name == "") is a memory database opened so
+ * that SQLite runs the libcephsqlite initialization routine to register the
+ * VFS. AFter that's done, the VFS is available for a future database open with
+ * the VFS set to "ceph":
+ *
+ *   sqlite3_open_v2("foo:bar/baz.db", &db, SQLITE_OPEN_READWRITE, "ceph");
+ *
+ * You MUST do this before calling any other libcephsqlite routine so that
+ * sqlite3 can pass its API routines to the libcephsqlite extension.
+ */
+
+LIBCEPHSQLITE_API int sqlite3_cephsqlite_init(sqlite3* db, char** err, const sqlite3_api_routines* api);
+
+/* If you prefer to have libcephsqlite use a CephContext managed by your
+ * application, use this routine to set that. libcephsqlite can only have one
+ * context globally.
+ */
+
+LIBCEPHSQLITE_API int cephsqlite_setcct(class CephContext* cct, char** ident);
+#ifdef __cplusplus
+}
+#endif
+
+#endif