lib: macos: Call pthread_cancel explicitly to ensure thread termination

Signed-off-by: Hiroshi Hatake <[email protected]>

Author: cosmo0920

src/flb_lib.c

@@ -680,6 +680,7 @@ int flb_start(flb_ctx_t *ctx)
         }
         else if (val == FLB_ENGINE_FAILED) {
             flb_error("[lib] backend failed");
+            pthread_cancel(tid);
             pthread_join(tid, NULL);
             ctx->status = FLB_LIB_ERROR;
             return -1;
@@ -711,6 +712,7 @@ int flb_stop(flb_ctx_t *ctx)
          * the service exited for some reason (plugin action). Always
          * wait and double check that the child thread is not running.
          */
+        pthread_cancel(tid);
         pthread_join(tid, NULL);
         return 0;
     }
@@ -726,6 +728,7 @@ int flb_stop(flb_ctx_t *ctx)
     flb_debug("[lib] sending STOP signal to the engine");
 
     flb_engine_exit(ctx->config);
+    pthread_cancel(tid);
     ret = pthread_join(tid, NULL);
     if (ret != 0) {
         flb_errno();