refact: remote printer, adapter dll, free data ptr (#11279)

Signed-off-by: fufesou <linlong1266@gmail.com>

src/client/io_loop.rs

@@ -1544,7 +1544,13 @@ impl<T: InvokeUiSession> Remote<T> {
                                 job.modify_time();
                                 err = job.job_error();
                                 job_type = job.r#type;
-                                printer_data = job.get_buf_data();
+                                printer_data = match job.get_buf_data().await {
+                                    Ok(d) => d,
+                                    Err(e) => {
+                                        log::error!("Failed to get the printer data: {}", e);
+                                        None
+                                    }
+                                };
                             }
                             match job_type {
                                 fs::JobType::Generic => {
@@ -1552,10 +1558,10 @@ impl<T: InvokeUiSession> Remote<T> {
                                 }
                                 fs::JobType::Printer => {
                                     if let Some(err) = err {
-                                        log::error!("Received printer job failed, error {err}");
+                                        log::error!("Receive print job failed, error {err}");
                                     } else {
                                         log::info!(
-                                            "Received printer job done, data len: {:?}",
+                                            "Receive print job done, data len: {:?}",
                                             printer_data.as_ref().map(|d| d.len()).unwrap_or(0)
                                         );
                                         #[cfg(target_os = "windows")]

src/server/printer_service.rs

@@ -17,6 +17,8 @@ pub type Uninit = fn();
 // data: The raw prn data, xps format.
 // data_len: The length of the raw prn data.
 pub type GetPrnData = fn(dur_mills: u32, data: *mut *mut i8, data_len: *mut u32);
+// Free the prn data allocated by GetPrnData().
+pub type FreePrnData = fn(data: *mut i8);
 
 macro_rules! make_lib_wrapper {
     ($($field:ident : $tp:ty),+) => {
@@ -78,7 +80,8 @@ macro_rules! make_lib_wrapper {
 make_lib_wrapper!(
     init: Init,
     uninit: Uninit,
-    get_prn_data: GetPrnData
+    get_prn_data: GetPrnData,
+    free_prn_data: FreePrnData
 );
 
 lazy_static::lazy_static! {
@@ -135,9 +138,7 @@ fn get_prn_data(dur_mills: u32) -> ResultType<Vec<u8>> {
         }
         let bytes =
             Vec::from(unsafe { std::slice::from_raw_parts(data as *const u8, data_len as usize) });
-        unsafe {
-            hbb_common::libc::free(data as *mut std::ffi::c_void);
-        }
+        lib_wrapper.free_prn_data.map(|f| f(data));
         Ok(bytes)
     } else {
         bail!("Failed to load func get_prn_file");