fix: close remaining PR 208 review gaps

src/client/client_send.c

@@ -28,6 +28,20 @@
 /* Forward declaration for progress-reporting thread used in multithreaded send. */
 static int progress_thread_fn(void* arg);
 
+static void pipeline_cancel(PipelineContextSender* context) {
+  mtx_lock(&context->mutex_scanner);
+  mtx_lock(&context->mutex_loader);
+  atomic_store(&context->cancelled, true);
+  context->scanner_done = true;
+  context->loader_done = true;
+  cnd_broadcast(&context->condition_not_full_scanner);
+  cnd_broadcast(&context->condition_not_empty_scanner);
+  cnd_broadcast(&context->condition_not_full_loader);
+  cnd_broadcast(&context->condition_not_empty_loader);
+  mtx_unlock(&context->mutex_loader);
+  mtx_unlock(&context->mutex_scanner);
+}
+
 /* Print dry-run manifest showing files that would be transferred. Returns 0 on success. */
 static int send_dry_run_manifest(Config* config) {
   DirectoryScanner* scanner = directory_scanner_create(
@@ -344,6 +358,7 @@ static int send_chunks_multithreaded(void* pipeline_context) {
       return ok ? thrd_success : thrd_error;
 
     send_fail:
+      pipeline_cancel(context);
       client_disconnect(client);
       client_delete(client);
       mtx_lock(&context->mutex_progress);
@@ -354,6 +369,7 @@ static int send_chunks_multithreaded(void* pipeline_context) {
     if (send_chunk(client, current_chunk, context->config) != 0) {
       fprintf(stderr, "Error: unexpected error while sending chunk\n");
       chunk_destroy(current_chunk);
+      pipeline_cancel(context);
       client_disconnect(client);
       client_delete(client);
       mtx_lock(&context->mutex_progress);
@@ -388,15 +404,7 @@ static int scan_directory_multithreaded(void* pipeline_context) {
   Chunk* current_chunk;
   if (scanner == NULL) {
     log_message(LOG_LEVEL_ERROR, "Failed to create parallel scanner");
-    atomic_store(&context->cancelled, true);
-    cnd_broadcast(&context->condition_not_full_scanner);
-    cnd_broadcast(&context->condition_not_empty_scanner);
-    cnd_broadcast(&context->condition_not_full_loader);
-    cnd_broadcast(&context->condition_not_empty_loader);
-    mtx_lock(&context->mutex_scanner);
-    context->scanner_done = true;
-    cnd_broadcast(&context->condition_not_empty_scanner);
-    mtx_unlock(&context->mutex_scanner);
+    pipeline_cancel(context);
     return thrd_error;
   }
   while ((current_chunk = parallel_scanner_next(scanner)) != NULL) {
@@ -410,18 +418,14 @@ static int scan_directory_multithreaded(void* pipeline_context) {
         if (!manifest_entry) {
           log_message(LOG_LEVEL_ERROR, "Failed to allocate manifest entry");
           mtx_unlock(&context->mutex_scanner);
-          atomic_store(&context->cancelled, true);
-          cnd_broadcast(&context->condition_not_full_scanner);
-          cnd_broadcast(&context->condition_not_empty_scanner);
+          pipeline_cancel(context);
           parallel_scanner_destroy(scanner);
           return thrd_error;
         }
         if (!array_list_add(context->manifest, manifest_entry)) {
           free(manifest_entry);
-          atomic_store(&context->cancelled, true);
-          cnd_broadcast(&context->condition_not_full_scanner);
-          cnd_broadcast(&context->condition_not_empty_scanner);
           mtx_unlock(&context->mutex_scanner);
+          pipeline_cancel(context);
           chunk_destroy(current_chunk);
           parallel_scanner_destroy(scanner);
           return thrd_error;
@@ -434,13 +438,21 @@ static int scan_directory_multithreaded(void* pipeline_context) {
             &context->condition_not_empty_scanner, &context->condition_not_full_scanner,
             &context->cancelled)) {
       chunk_destroy(current_chunk);
-      atomic_store(&context->cancelled, true);
-      cnd_broadcast(&context->condition_not_full_scanner);
-      cnd_broadcast(&context->condition_not_empty_scanner);
+      pipeline_cancel(context);
       parallel_scanner_destroy(scanner);
       return thrd_error;
     }
   }
+  if (parallel_scanner_failed(scanner)) {
+    parallel_scanner_destroy(scanner);
+    mtx_lock(&context->mutex_scanner);
+    context->scanner_done = true;
+    cnd_broadcast(&context->condition_not_empty_scanner);
+    cnd_broadcast(&context->condition_not_full_scanner);
+    mtx_unlock(&context->mutex_scanner);
+    pipeline_cancel(context);
+    return thrd_error;
+  }
   mtx_lock(&context->mutex_scanner);
   context->scanner_done = true;
   cnd_signal(&context->condition_not_empty_scanner);
@@ -576,6 +588,15 @@ int send_files(Config* config) {
   time_t last_progress = 0;
   time_t start = time(NULL);
   ArrayList* manifest = config->use_delete ? array_list_create(free) : NULL;
+  if (!scanner || (config->use_delete && !manifest)) {
+    if (scanner)
+      directory_scanner_destroy(scanner);
+    if (manifest)
+      array_list_delete(manifest);
+    client_disconnect(client);
+    client_delete(client);
+    return 1;
+  }
   while ((current_chunk = directory_scanner_next(scanner)) != NULL) {
     unsigned long long chunk_bytes = 0;
     for (int i = 0; i < current_chunk->element_count; i++) {
@@ -620,6 +641,9 @@ int send_files(Config* config) {
     if (send_chunk(client, current_chunk, config) != 0) {
       log_message(LOG_LEVEL_ERROR, "Failed to send chunk");
       chunk_destroy(current_chunk);
+      if (manifest)
+        array_list_delete(manifest);
+      manifest = NULL;
       break;
     }
     if (config->show_progress) {
@@ -635,12 +659,15 @@ int send_files(Config* config) {
     }
     chunk_destroy(current_chunk);
   }
+  if (directory_scanner_failed(scanner) || (config->use_delete && manifest == NULL))
+    goto send_fail;
   if (config->use_delete) {
     if (send_delete_manifest(client->file_descriptor, manifest) != 0) {
       array_list_delete(manifest);
       goto send_fail;
     }
     array_list_delete(manifest);
+    manifest = NULL;
   }
   if (!send_status(client->file_descriptor, STATUS_FINISHED))
     goto send_fail;
@@ -662,6 +689,8 @@ int send_files(Config* config) {
   return ok ? 0 : 1;
 
 send_fail:
+  if (manifest)
+    array_list_delete(manifest);
   directory_scanner_destroy(scanner);
   client_disconnect(client);
   client_delete(client);
@@ -715,14 +744,10 @@ int send_files_multithreaded(Config* config) {
 
   if (!scanner_created || !loader_created || !sender_created) {
     perror("Error creating threads.\n");
-    atomic_store(&context->cancelled, true);
-    context->scanner_done = true;
-    context->loader_done = true;
+    pipeline_cancel(context);
+    mtx_lock(&context->mutex_progress);
     context->sender_done = true;
-    cnd_broadcast(&context->condition_not_full_scanner);
-    cnd_broadcast(&context->condition_not_empty_scanner);
-    cnd_broadcast(&context->condition_not_full_loader);
-    cnd_broadcast(&context->condition_not_empty_loader);
+    mtx_unlock(&context->mutex_progress);
     if (sender_created)
       thrd_join(sender, NULL);
     if (loader_created)