Type Alias LogCallback 

pub type LogCallback = extern "C" fn(u8, *const i8, *const u8, usize);

FFI callback function type for logging

Parameters

• level: Log level (0=Trace, 1=Debug, 2=Info, 3=Warn, 4=Error)
• target: Log target (module path), null-terminated C string
• message: Log message, pointer to UTF-8 bytes
• message_len: Length of the message in bytes

Safety

The callback is invoked from Rust code. The target string is null-terminated. The message pointer is valid for message_len bytes during the callback.