liblog: add __android_log_close()
Bug: 30963384
(cherry picked from commit df7a4c6bae5f85532d79a93b7d9197a2aab17825)
Change-Id: I2255486e84dd55af0f4e7fbbfb616c2deb1765d0
diff --git a/liblog/logd_write.c b/liblog/logd_write.c
index b2668ce..6451abe 100644
--- a/liblog/logd_write.c
+++ b/liblog/logd_write.c
@@ -282,6 +282,45 @@
}
#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