Macro ngx_log_debug_mask

macro_rules! ngx_log_debug_mask {
    ( DebugMask::Core, $log:expr, $($arg:tt)+ ) => { ... };
    ( DebugMask::Alloc, $log:expr, $($arg:tt)+ ) => { ... };
    ( DebugMask::Mutex, $log:expr, $($arg:tt)+ ) => { ... };
    ( DebugMask::Event, $log:expr, $($arg:tt)+ ) => { ... };
    ( DebugMask::Http, $log:expr, $($arg:tt)+ ) => { ... };
    ( DebugMask::Mail, $log:expr, $($arg:tt)+ ) => { ... };
    ( DebugMask::Stream, $log:expr, $($arg:tt)+ ) => { ... };
}

Log with requested debug mask.

NOTE: This macro supports DebugMask::Http (NGX_LOG_DEBUG_HTTP), however, if you have access to a Request object via an http handler it can be more convenient and readable to use the ngx_log_debug_http macro instead.

See https://nginx.org/en/docs/dev/development_guide.html#logging for details and available masks.