Add error logging

cpp/include/kvikio/error.hpp

@@ -115,6 +115,9 @@ void cufile_check_bytes_done_2(ssize_t nbytes_done, int line_number, char const*
   }
 }
 
+#define KVIKIO_LOG_ERROR(err_msg) kvikio::detail::log_error(err_msg, __LINE__, __FILE__)
+void log_error(std::string_view err_msg, int line_number, char const* filename);
+
 }  // namespace detail
 
 }  // namespace kvikio

cpp/src/error.cpp

@@ -14,4 +14,19 @@
  * limitations under the License.
  */
 
+#include <iostream>
+
 #include <kvikio/error.hpp>
+
+namespace kvikio {
+
+namespace detail {
+
+void log_error(std::string_view err_msg, int line_number, char const* filename)
+{
+  std::cerr << "KvikIO error at: " << filename << ":" << line_number << ": " << err_msg << "\n";
+}
+
+}  // namespace detail
+
+}  // namespace kvikio

cpp/src/file_utils.cpp

@@ -21,6 +21,7 @@
 #include <system_error>
 #include <utility>
 
+#include <kvikio/error.hpp>
 #include <kvikio/file_utils.hpp>
 #include <kvikio/shim/cufile.hpp>
 
@@ -57,7 +58,7 @@ bool FileWrapper::opened() const noexcept { return _fd != -1; }
 void FileWrapper::close() noexcept
 {
   if (opened()) {
-    ::close(_fd);
+    if (::close(_fd) != 0) { KVIKIO_LOG_ERROR("File cannot be closed"); }
     _fd = -1;
   }
 }