liblog: add __android_log_close() am: 2d14969155 (7b16dcf9) · Commits · e / os / android_system_core

include/android/log.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -88,6 +88,11 @@ typedef enum android_LogPriority {
		ANDROID_LOG_SILENT, /* only for SetMinPriority(); must be last */
		} android_LogPriority;

		/*
		* Release any logger resources (a new log write will immediately re-acquire)
		*/
		void __android_log_close();

		/*
		* Send a simple string to the log.
		*/

+39 −0

Original line number	Diff line number	Diff line
		@@ -282,6 +282,45 @@ const char *android_log_id_to_name(log_id_t log_id)
		}
		#endif

		/*
		* Release any logger resources. A new log write will immediately re-acquire.
		*/
		void __android_log_close()
		{
		#if FAKE_LOG_DEVICE
		int i;
		#endif

		#ifdef HAVE_PTHREADS
		pthread_mutex_lock(&log_init_lock);
		#endif

		write_to_log = __write_to_log_init;

		/*
		* Threads that are actively writing at this point are not held back
		* by a lock and are at risk of dropping the messages with a return code
		* -EBADF. Prefer to return error code than add the overhead of a lock to
		* each log writing call to guarantee delivery. In addition, anyone
		* calling this is doing so to release the logging resources and shut down,
		* for them to do so with outstanding log requests in other threads is a
		* disengenuous use of this function.
		*/
		#if FAKE_LOG_DEVICE
		for (i = 0; i < LOG_ID_MAX; i++) {
		fakeLogClose(log_fds[i]);
		log_fds[i] = -1;
		}
		#else
		close(logd_fd);
		logd_fd = -1;
		#endif

		#ifdef HAVE_PTHREADS
		pthread_mutex_unlock(&log_init_lock);
		#endif
		}

		static int __write_to_log_init(log_id_t log_id, struct iovec *vec, size_t nr)
		{
		#ifdef HAVE_PTHREADS

+35 −0

Original line number	Diff line number	Diff line
		@@ -117,6 +117,41 @@ static int __write_to_log_kernel(log_id_t log_id, struct iovec *vec, size_t nr)
		return ret;
		}

		/*
		* Release any logger resources. A new log write will immediately re-acquire.
		*/
		void __android_log_close()
		{
		#ifdef HAVE_PTHREADS
		pthread_mutex_lock(&log_init_lock);
		#endif

		write_to_log = __write_to_log_init;

		/*
		* Threads that are actively writing at this point are not held back
		* by a lock and are at risk of dropping the messages with a return code
		* -EBADF. Prefer to return error code than add the overhead of a lock to
		* each log writing call to guarantee delivery. In addition, anyone
		* calling this is doing so to release the logging resources and shut down,
		* for them to do so with outstanding log requests in other threads is a
		* disengenuous use of this function.
		*/

		log_close(log_fds[LOG_ID_MAIN]);
		log_fds[LOG_ID_MAIN] = -1;
		log_close(log_fds[LOG_ID_RADIO]);
		log_fds[LOG_ID_RADIO] = -1;
		log_close(log_fds[LOG_ID_EVENTS]);
		log_fds[LOG_ID_EVENTS] = -1;
		log_close(log_fds[LOG_ID_SYSTEM]);
		log_fds[LOG_ID_SYSTEM] = -1;

		#ifdef HAVE_PTHREADS
		pthread_mutex_unlock(&log_init_lock);
		#endif
		}

		static int __write_to_log_init(log_id_t log_id, struct iovec *vec, size_t nr)
		{
		#ifdef HAVE_PTHREADS

+9 −1

Original line number	Diff line number	Diff line
		@@ -124,12 +124,17 @@ TEST(liblog, __android_log_btwrite__android_logger_list_read) {
		ASSERT_TRUE(NULL != (logger_list = android_logger_list_open(
		LOG_ID_EVENTS, O_RDONLY \| O_NDELAY, 1000, pid)));

		// Check that we can close and reopen the logger
		log_time ts(CLOCK_MONOTONIC);

		ASSERT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts, sizeof(ts)));
		__android_log_close();

		log_time ts1(CLOCK_MONOTONIC);
		ASSERT_LT(0, __android_log_btwrite(0, EVENT_TYPE_LONG, &ts1, sizeof(ts1)));
		usleep(1000000);

		int count = 0;
		int second_count = 0;

		for (;;) {
		log_msg log_msg;
		@@ -153,10 +158,13 @@ TEST(liblog, __android_log_btwrite__android_logger_list_read) {
		log_time tx(eventData + 4 + 1);
		if (ts == tx) {
		++count;
		} else if (ts1 == tx) {
		++second_count;
		}
		}

		EXPECT_EQ(1, count);
		EXPECT_EQ(1, second_count);

		android_logger_list_close(logger_list);
		}