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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_TimelineConsumers_h_
#define mozilla_TimelineConsumers_h_
#include "nsIObserver.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/LinkedList.h"
#include "mozilla/StaticMutex.h"
#include "TimelineMarkerEnums.h" // for MarkerTracingType
class nsDocShell;
class nsIDocShell;
struct JSContext;
namespace mozilla {
class TimeStamp;
class MarkersStorage;
class AbstractTimelineMarker;
namespace dom {
struct ProfileTimelineMarker;
}
class TimelineConsumers : public nsIObserver
{
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIOBSERVER
private:
TimelineConsumers();
TimelineConsumers(const TimelineConsumers& aOther) = delete;
void operator=(const TimelineConsumers& aOther) = delete;
virtual ~TimelineConsumers() = default;
bool Init();
bool RemoveObservers();
public:
static already_AddRefed<TimelineConsumers> Get();
// Methods for registering interested consumers (i.e. "devtools toolboxes").
// Each consumer should be directly focused on a particular docshell, but
// timeline markers don't necessarily have to be tied to that docshell.
// See the public `AddMarker*` methods below.
// Main thread only.
void AddConsumer(nsDocShell* aDocShell);
void RemoveConsumer(nsDocShell* aDocShell);
bool HasConsumer(nsIDocShell* aDocShell);
// Checks if there's any existing interested consumer.
// May be called from any thread.
bool IsEmpty();
// Methods for adding markers relevant for particular docshells, or generic
// (meaning that they either can't be tied to a particular docshell, or one
// wasn't accessible in the part of the codebase where they're instantiated).
// These will only add markers if at least one docshell is currently being
// observed by a timeline. Markers tied to a particular docshell won't be
// created unless that docshell is specifically being currently observed.
// See nsIDocShell::recordProfileTimelineMarkers
// These methods create a basic TimelineMarker from a name and some metadata,
// relevant for a specific docshell.
// Main thread only.
void AddMarkerForDocShell(nsDocShell* aDocShell,
const char* aName,
MarkerTracingType aTracingType,
MarkerStackRequest aStackRequest = MarkerStackRequest::STACK);
void AddMarkerForDocShell(nsIDocShell* aDocShell,
const char* aName,
MarkerTracingType aTracingType,
MarkerStackRequest aStackRequest = MarkerStackRequest::STACK);
void AddMarkerForDocShell(nsDocShell* aDocShell,
const char* aName,
const TimeStamp& aTime,
MarkerTracingType aTracingType,
MarkerStackRequest aStackRequest = MarkerStackRequest::STACK);
void AddMarkerForDocShell(nsIDocShell* aDocShell,
const char* aName,
const TimeStamp& aTime,
MarkerTracingType aTracingType,
MarkerStackRequest aStackRequest = MarkerStackRequest::STACK);
// These methods register and receive ownership of an already created marker,
// relevant for a specific docshell.
// Main thread only.
void AddMarkerForDocShell(nsDocShell* aDocShell,
UniquePtr<AbstractTimelineMarker>&& aMarker);
void AddMarkerForDocShell(nsIDocShell* aDocShell,
UniquePtr<AbstractTimelineMarker>&& aMarker);
// These methods create a basic marker from a name and some metadata,
// which doesn't have to be relevant to a specific docshell.
// May be called from any thread.
void AddMarkerForAllObservedDocShells(const char* aName,
MarkerTracingType aTracingType,
MarkerStackRequest aStackRequest = MarkerStackRequest::STACK);
void AddMarkerForAllObservedDocShells(const char* aName,
const TimeStamp& aTime,
MarkerTracingType aTracingType,
MarkerStackRequest aStackRequest = MarkerStackRequest::STACK);
// This method clones and registers an already instantiated marker,
// which doesn't have to be relevant to a specific docshell.
// May be called from any thread.
void AddMarkerForAllObservedDocShells(UniquePtr<AbstractTimelineMarker>& aMarker);
void PopMarkers(nsDocShell* aDocShell,
JSContext* aCx,
nsTArray<dom::ProfileTimelineMarker>& aStore);
private:
static StaticRefPtr<TimelineConsumers> sInstance;
static bool sInShutdown;
// Counter for how many timelines are currently interested in markers,
// and a list of the MarkersStorage interfaces representing them.
unsigned long mActiveConsumers;
LinkedList<MarkersStorage> mMarkersStores;
// Protects this class's data structures.
static StaticMutex sMutex;
};
} // namespace mozilla
#endif /* mozilla_TimelineConsumers_h_ */
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