<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=Windows-1252"> <style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style> </head> <body dir="ltr"> <div class="WordSection1"> <a name="_olk_replyheader"> </a> <a name="_olk_quotedtext">Hi everyone.</a> I have problems with g_main_loop_run executing it in another thread. I’m using a Digital Persona U are U 4500 device. I have an init function that opens a device, when the device is opened, then g_main_loop_run is execute in another thread. When I close the device calling fp_device_close_sync the result is TRUE but I have the following error: <div> <div> <div> (process:38166): libfprint-image_device-DEBUG: 10:56:02.418: Image device close completed </div> <div> (process:38166): libfprint-device-DEBUG: 10:56:02.418: Device reported close completion </div> <div> (process:38166): libfprint-device-DEBUG: 10:56:02.418: Completing action FPI_DEVICE_ACTION_CLOSE in idle! </div> <div> (process:38166): GLib-CRITICAL **: 10:56:02.418: g_source_unref: assertion 'source != NULL' failed </div> </div> </div> The documentation for fp_device_close_sync says that the return value is: FALSE on error, TRUE otherwise. So, if the function returns TRUE why this error? Another problem is that sometimes calling fp_device_close_sync freezes the app because fp_device_close_sync never returns. Here is my code: <div> <div> typedef struct </div> <div> { </div> <div> FpContext *ctx; ///< Libfprint context. </div> <div> FpDevice *device; ///< Libfprint device. </div> <div> pthread_t event_t; ///< The glib event loop thread. </div> <div> GMainLoop *gmloop; ///< Glib event manager loop. </div> <div> }tETR_FP_CONTEXT; </div> <div> typedef struct </div> <div> { </div> <div> tKERNEL_FSM *fsm; ///< Finite State Machine structure pointer. </div> <div> tETR_FP_CONTEXT ctx; ///< Fingerprint context structure. </div> <div> }tAUTOMATON_DATA; </div> <div> static void * etr_fp_execute_loop(void *data) </div> <div> { </div> <div> tAUTOMATON_DATA *aut = (tAUTOMATON_DATA *) data; </div> <div> aut->ctx.gmloop = g_main_loop_new(NULL,FALSE); </div> <div> g_main_loop_run(aut->ctx.gmloop); </div> <div> return NULL; </div> <div> } </div> <div> void init__entry(tAUTOMATON_DATA *aut) </div> <div> { </div> <div> FpDevice *device; </div> <div> GPtrArray *devices; </div> <div> g_autoptr(GError) gerror = NULL; </div> <div> aut->ctx.ctx = fp_context_new(); </div> <div> devices = fp_context_get_devices(aut->ctx.ctx); </div> <div> if (devices && devices->len) </div> <div> { </div> <div> device = g_ptr_array_index(devices,0); </div> <div> aut->ctx.device = device; </div> <div> // Open device </div> <div> if (fp_device_open_sync(aut->ctx.device,aut->ctx.clops,&gerror)) </div> <div> { </div> <div> // Execute g_main_loop_run in another thread </div> <div> if (!pthread_create(&aut->ctx.event_t,NULL,&etr_fp_execute_loop,aut)) { </div> <div> pthread_detach(aut->ctx.event_t); </div> <div> KernelInsertEvent(aut->fsm->aut_id,AUT_EVT_OPENED,NULL,0); </div> <div> } </div> <div> else </div> <div> LogError("Unable to create glib event loop thread"); </div> <div> } </div> <div> else </div> <div> LogError("Unable to open device. %s",gerror->message); </div> <div> } </div> <div> else LogError("Unable to find a compatible device"); </div> <div> } </div> <div> static void etr_fp_dev_close(tAUTOMATON_DATA *aut) </div> <div> { </div> <div> g_autoptr(GError) gerror = NULL; </div> <div> if (!fp_device_close_sync(aut->ctx.device,NULL,&gerror)) // Sometimes calling this function { // freezes the app. Because never returns. </div> <div> LogError("Error closing device: %s",gerror->message); } </div> <div> g_clear_object(&aut->ctx.ctx); </div> <div> g_clear_object(&aut->ctx.clops); </div> <div> if (aut->ctx.gmloop != NULL) { </div> <div> g_main_loop_quit(aut->ctx.gmloop); </div> <div> g_main_loop_unref(aut->ctx.gmloop); </div> <div> } </div> <div> } </div> </div> If I create a new context with g_main_context_new and apply to g_main_loop_new as follows: new_context = g_main_context_new(); aut->ctx.gmloop = g_main_loop_new(new_context, false); and use the follow functions in the thread function: static void * etr_fp_execute_loop(void *data) { tAUTOMATON_DATA *aut = (tAUTOMATON_DATA *) data; g_main_context_push_thread_default(new_context); g_main_loop_run(aut->ctx.gmloop); g_main_context_pop_thread_default(new_context); return NULL; } Nothing works. Hope someone can help me. Thank you all. </div> </body> </html>