### Function

# GLib log_writer_default_would_drop

since: 2.68

#### Declaration

    gboolean
    g_log_writer_default_would_drop (
      GLogLevelFlags log_level,
      const char* log_domain
    )

#### Description

Check whether `g_log_writer_default()` and `g_log_default_handler()` would ignore a message with the given domain and level.

As with `g_log_default_handler()`, this function drops debug and informational messages unless their log domain (or `all`) is listed in the space-separated `G_MESSAGES_DEBUG` environment variable, or by `g_log_writer_default_set_debug_domains()`.

This can be used when implementing log writers with the same filtering behaviour as the default, but a different destination or output format:

    if (g_log_writer_default_would_drop (log_level, log_domain))
      return G_LOG_WRITER_HANDLED;
    ]|

    or to skip an expensive computation if it is only needed for a debugging
    message, and `G_MESSAGES_DEBUG` is not set:

    ```c
    if (!g_log_writer_default_would_drop (G_LOG_LEVEL_DEBUG, G_LOG_DOMAIN))
      {
        g_autofree gchar *result = expensive_computation (my_object);

        g_debug ("my_object result: %s", result);
      }

Available since: 2.68

#### Parameters

`log_level`

  Type: `GLogLevelFlags`

  Log level, either from `GLogLevelFlags`, or a user-defined level.

`log_domain`

  Type: `const char*`

  Log domain.

  The argument can be `NULL`.
  The data is owned by the caller of the function.
  The value is a NUL terminated UTF-8 string.

#### Return value

Type: `gboolean`

`TRUE` if the log message would be dropped by GLib’s default log handlers.