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//! Tracks metadata for a loading/rendering session.
use std::sync::Arc;
/// Metadata for a loading/rendering session.
///
/// When the calling program first uses one of the API entry points (e.g. `Loader::new()`
/// in the Rust API, or `rsvg_handle_new()` in the C API), there is no context yet where
/// librsvg's code may start to track things. This struct provides that context.
#[derive(Clone)]
pub struct Session {
inner: Arc<SessionInner>,
}
struct SessionInner {
log_enabled: bool,
fn log_enabled_via_env_var() -> bool {
::std::env::var_os("RSVG_LOG").is_some()
impl Default for Session {
fn default() -> Self {
Self {
inner: Arc::new(SessionInner {
log_enabled: log_enabled_via_env_var(),
}),
impl Session {
#[cfg(test)]
pub fn new_for_test_suite() -> Self {
inner: Arc::new(SessionInner { log_enabled: false }),
pub fn log_enabled(&self) -> bool {
self.inner.log_enabled