Revert "Move webrtc/{base => rtc_base}" (https://codereview.webrtc.org/2877023002)
Will reland in two different commits to preserve git blame history.
BUG=webrtc:7634
NOTRY=True
TBR=kwiberg@webrtc.org
Change-Id: I550da8525aeb9c5b8f96338fcf1c9714f3dcdab1
Reviewed-on: https://chromium-review.googlesource.com/554610
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#18820}diff --git a/webrtc/base/onetimeevent.h b/webrtc/base/onetimeevent.h
index 6849bac..240cf14 100644
--- a/webrtc/base/onetimeevent.h
+++ b/webrtc/base/onetimeevent.h
@@ -11,9 +11,51 @@
#ifndef WEBRTC_BASE_ONETIMEEVENT_H_
#define WEBRTC_BASE_ONETIMEEVENT_H_
+#include "webrtc/base/criticalsection.h"
+#include "webrtc/typedefs.h"
-// This header is deprecated and is just left here temporarily during
-// refactoring. See https://bugs.webrtc.org/7634 for more details.
-#include "webrtc/rtc_base/onetimeevent.h"
+namespace webrtc {
+// Provides a simple way to perform an operation (such as logging) one
+// time in a certain scope.
+// Example:
+// OneTimeEvent firstFrame;
+// ...
+// if (firstFrame()) {
+// LOG(LS_INFO) << "This is the first frame".
+// }
+class OneTimeEvent {
+ public:
+ OneTimeEvent() {}
+ bool operator()() {
+ rtc::CritScope cs(&critsect_);
+ if (happened_) {
+ return false;
+ }
+ happened_ = true;
+ return true;
+ }
+
+ private:
+ bool happened_ = false;
+ rtc::CriticalSection critsect_;
+};
+
+// A non-thread-safe, ligher-weight version of the OneTimeEvent class.
+class ThreadUnsafeOneTimeEvent {
+ public:
+ ThreadUnsafeOneTimeEvent() {}
+ bool operator()() {
+ if (happened_) {
+ return false;
+ }
+ happened_ = true;
+ return true;
+ }
+
+ private:
+ bool happened_ = false;
+};
+
+} // namespace webrtc
#endif // WEBRTC_BASE_ONETIMEEVENT_H_