update ceph source to reef 18.1.2

[ceph.git] / ceph / src / jaegertracing / opentelemetry-cpp / api / include / opentelemetry / plugin / detail / dynamic_load_unix.h

diff --git a/ceph/src/jaegertracing/opentelemetry-cpp/api/include/opentelemetry/plugin/detail/dynamic_load_unix.h b/ceph/src/jaegertracing/opentelemetry-cpp/api/include/opentelemetry/plugin/detail/dynamic_load_unix.h
new file mode 100644 (file)
index 0000000..bcc4bd0
--- /dev/null
+++ b/ceph/src/jaegertracing/opentelemetry-cpp/api/include/opentelemetry/plugin/detail/dynamic_load_unix.h
@@ -0,0 +1,72 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include <algorithm>
+#include <memory>
+
+#include <dlfcn.h>
+
+#include "opentelemetry/plugin/detail/utility.h"
+#include "opentelemetry/plugin/factory.h"
+#include "opentelemetry/plugin/hook.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace plugin
+{
+class DynamicLibraryHandleUnix final : public DynamicLibraryHandle
+{
+public:
+  explicit DynamicLibraryHandleUnix(void *handle) noexcept : handle_{handle} {}
+
+  ~DynamicLibraryHandleUnix() override { ::dlclose(handle_); }
+
+private:
+  void *handle_;
+};
+
+inline std::unique_ptr<Factory> LoadFactory(const char *plugin, std::string &error_message) noexcept
+{
+  dlerror();  // Clear any existing error.
+
+  auto handle = ::dlopen(plugin, RTLD_NOW | RTLD_LOCAL);
+  if (handle == nullptr)
+  {
+    detail::CopyErrorMessage(dlerror(), error_message);
+    return nullptr;
+  }
+
+  std::shared_ptr<DynamicLibraryHandle> library_handle{new (std::nothrow)
+                                                           DynamicLibraryHandleUnix{handle}};
+  if (library_handle == nullptr)
+  {
+    return nullptr;
+  }
+
+  auto make_factory_impl =
+      reinterpret_cast<OpenTelemetryHook *>(::dlsym(handle, "OpenTelemetryMakeFactoryImpl"));
+  if (make_factory_impl == nullptr)
+  {
+    detail::CopyErrorMessage(dlerror(), error_message);
+    return nullptr;
+  }
+  if (*make_factory_impl == nullptr)
+  {
+    detail::CopyErrorMessage("Invalid plugin hook", error_message);
+    return nullptr;
+  }
+  LoaderInfo loader_info;
+  nostd::unique_ptr<char[]> plugin_error_message;
+  auto factory_impl = (**make_factory_impl)(loader_info, plugin_error_message);
+  if (factory_impl == nullptr)
+  {
+    detail::CopyErrorMessage(plugin_error_message.get(), error_message);
+    return nullptr;
+  }
+  return std::unique_ptr<Factory>{new (std::nothrow)
+                                      Factory{std::move(library_handle), std::move(factory_impl)}};
+}
+}  // namespace plugin
+OPENTELEMETRY_END_NAMESPACE