cutils: trace: add asynchronous events
Change-Id: Ia09d34cbc6c8c85fb3d0f1a7e95de53d1b79e998
diff --git a/include/cutils/trace.h b/include/cutils/trace.h
index 1db3903..ad65dfb 100644
--- a/include/cutils/trace.h
+++ b/include/cutils/trace.h
@@ -182,6 +182,47 @@
}
/**
+ * Trace the beginning of an asynchronous event. Unlike ATRACE_BEGIN/ATRACE_END
+ * contexts, asynchronous events do not need to be nested. The name describes
+ * the event, and the cookie provides a unique identifier for distinguishing
+ * simultaneous events. The name and cookie used to begin an event must be
+ * used to end it.
+ */
+#define ATRACE_ASYNC_BEGIN(name, cookie) \
+ atrace_async_begin(ATRACE_TAG, name, cookie)
+static inline void atrace_async_begin(uint64_t tag, const char* name,
+ int32_t cookie)
+{
+ if (CC_UNLIKELY(atrace_is_tag_enabled(tag))) {
+ char buf[ATRACE_MESSAGE_LENGTH];
+ size_t len;
+
+ len = snprintf(buf, ATRACE_MESSAGE_LENGTH, "S|%d|%s|%d", getpid(),
+ name, cookie);
+ write(atrace_marker_fd, buf, len);
+ }
+}
+
+/**
+ * Trace the end of an asynchronous event.
+ * This should have a corresponding ATRACE_ASYNC_BEGIN.
+ */
+#define ATRACE_ASYNC_END(name, cookie) atrace_async_end(ATRACE_TAG, name, cookie)
+static inline void atrace_async_end(uint64_t tag, const char* name,
+ int32_t cookie)
+{
+ if (CC_UNLIKELY(atrace_is_tag_enabled(tag))) {
+ char buf[ATRACE_MESSAGE_LENGTH];
+ size_t len;
+
+ len = snprintf(buf, ATRACE_MESSAGE_LENGTH, "F|%d|%s|%d", getpid(),
+ name, cookie);
+ write(atrace_marker_fd, buf, len);
+ }
+}
+
+
+/**
* Traces an integer counter value. name is used to identify the counter.
* This can be used to track how a value changes over time.
*/