From 70b606111981cebf7c581c945118022a4f416577 Mon Sep 17 00:00:00 2001 From: Florian Forster Date: Wed, 26 Oct 2016 22:48:51 +0200 Subject: [PATCH] gps plugin: Replace busy loop with pthread_cond_timedwait(). --- src/gps.c | 29 ++++++++++------------------- 1 file changed, 10 insertions(+), 19 deletions(-) diff --git a/src/gps.c b/src/gps.c index 644967b3..b5294228 100644 --- a/src/gps.c +++ b/src/gps.c @@ -64,6 +64,7 @@ static cgps_data_t cgps_data = {NAN, NAN, NAN, NAN}; static pthread_t cgps_thread_id; static pthread_mutex_t cgps_data_lock = PTHREAD_MUTEX_INITIALIZER; static pthread_mutex_t cgps_thread_lock = PTHREAD_MUTEX_INITIALIZER; +static pthread_cond_t cgps_thread_cond = PTHREAD_COND_INITIALIZER; static int cgps_thread_shutdown = CGPS_FALSE; static int cgps_thread_running = CGPS_FALSE; @@ -72,27 +73,16 @@ static int cgps_thread_running = CGPS_FALSE; */ static int cgps_thread_pause(cdtime_t pTime) { - cdtime_t now; - now = cdtime (); - struct timespec pause_th; - CDTIME_T_TO_TIMESPEC (MS_TO_CDTIME_T(10), &pause_th); - while (CGPS_TRUE) - { - if ( (cdtime () - now) > pTime ) - { - break; - } + cdtime_t until = cdtime() + pTime; - pthread_mutex_lock (&cgps_thread_lock); - if (cgps_thread_shutdown == CGPS_TRUE) - { - return CGPS_FALSE; - } - pthread_mutex_unlock (&cgps_thread_lock); - nanosleep (&pause_th, NULL); - } + pthread_mutex_lock (&cgps_thread_lock); + pthread_cond_timedwait (&cgps_thread_cond, &cgps_thread_lock, + &CDTIME_T_TO_TIMESPEC (until)); + + int ret = !cgps_thread_shutdown; - return CGPS_TRUE; + pthread_mutex_lock (&cgps_thread_lock); + return ret; } /** @@ -329,6 +319,7 @@ static int cgps_shutdown (void) pthread_mutex_lock (&cgps_thread_lock); cgps_thread_shutdown = CGPS_TRUE; + pthread_cond_broadcast (&cgps_thread_cond); pthread_mutex_unlock (&cgps_thread_lock); pthread_join(cgps_thread_id, &res); -- 2.30.2