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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "starboard/shared/starboard/application.h"
#include "starboard/atomic.h"
#include "starboard/condition_variable.h"
#include "starboard/event.h"
#include "starboard/memory.h"
#include "starboard/string.h"
namespace starboard {
namespace shared {
namespace starboard {
namespace {
// Dispatches an event of |type| with |data| to the system event handler,
// calling |destructor| on |data| when finished dispatching. Does all
// appropriate NULL checks so you don't have to.
void Dispatch(SbEventType type, void* data, SbEventDataDestructor destructor) {
SbEvent event;
event.type = type;
event.data = data;
SbEventHandle(&event);
if (destructor) {
destructor(event.data);
}
}
// Dispatches a Start event to the system event handler.
void DispatchStart(int argc, char** argv, const char* link) {
SbEventStartData start_data;
start_data.argument_values = argv;
start_data.argument_count = argc;
start_data.link = link;
Dispatch(kSbEventTypeStart, &start_data, NULL);
}
// The next event ID to use for Schedule().
volatile SbAtomic32 g_next_event_id = 0;
} // namespace
Application* Application::g_instance = NULL;
Application::Application()
: error_level_(0),
thread_(SbThreadGetCurrent()),
start_link_(NULL),
state_(kStateUnstarted) {
Application* old_instance =
reinterpret_cast<Application*>(SbAtomicAcquire_CompareAndSwapPtr(
reinterpret_cast<SbAtomicPtr*>(&g_instance),
reinterpret_cast<SbAtomicPtr>(NULL),
reinterpret_cast<SbAtomicPtr>(this)));
SB_DCHECK(!old_instance);
}
Application::~Application() {
Application* old_instance =
reinterpret_cast<Application*>(SbAtomicAcquire_CompareAndSwapPtr(
reinterpret_cast<SbAtomicPtr*>(&g_instance),
reinterpret_cast<SbAtomicPtr>(this),
reinterpret_cast<SbAtomicPtr>(NULL)));
SB_DCHECK(old_instance);
SB_DCHECK(old_instance == this);
SbMemoryDeallocate(start_link_);
}
int Application::Run(int argc, char** argv) {
Initialize();
DispatchStart(argc, argv, start_link_);
state_ = kStateStarted;
for (;;) {
if (!DispatchAndDelete(GetNextEvent())) {
break;
}
}
Teardown();
return error_level_;
}
void Application::Pause(void* context, EventHandledCallback callback) {
Inject(new Event(kSbEventTypePause, context, callback));
}
void Application::Unpause(void* context, EventHandledCallback callback) {
Inject(new Event(kSbEventTypeUnpause, context, callback));
}
void Application::Suspend(void* context, EventHandledCallback callback) {
Inject(new Event(kSbEventTypeSuspend, context, callback));
}
void Application::Resume(void* context, EventHandledCallback callback) {
Inject(new Event(kSbEventTypeResume, context, callback));
}
void Application::Stop(int error_level) {
Event* event = new Event(kSbEventTypeStop, NULL, NULL);
event->error_level = error_level;
Inject(event);
}
SbEventId Application::Schedule(SbEventCallback callback,
void* context,
SbTimeMonotonic delay) {
SbEventId id = SbAtomicNoBarrier_Increment(&g_next_event_id, 1);
InjectTimedEvent(new TimedEvent(id, callback, context, delay));
return id;
}
void Application::Cancel(SbEventId id) {
CancelTimedEvent(id);
}
#if SB_HAS(PLAYER) && SB_IS(PLAYER_PUNCHED_OUT)
void Application::HandleFrame(SbPlayer player,
const player::VideoFrame& frame,
int x,
int y,
int width,
int height) {
AcceptFrame(player, frame, x, y, width, height);
}
#endif // SB_HAS(PLAYER) && SB_IS(PLAYER_PUNCHED_OUT)
void Application::SetStartLink(const char* start_link) {
SbMemoryDeallocate(start_link_);
if (start_link) {
start_link_ = SbStringDuplicate(start_link);
} else {
start_link_ = NULL;
}
}
bool Application::DispatchAndDelete(Application::Event* event) {
if (!event) {
return true;
}
// Ensure that we go through the the appropriate lifecycle events based on the
// current state.
switch (event->event->type) {
case kSbEventTypePause:
if (state() != kStateStarted) {
delete event;
return true;
}
break;
case kSbEventTypeUnpause:
if (state() == kStateStarted) {
delete event;
return true;
}
if (state() == kStateSuspended) {
Inject(new Event(kSbEventTypeResume, NULL, NULL));
Inject(event);
return true;
}
break;
case kSbEventTypeSuspend:
if (state() == kStateSuspended) {
delete event;
return true;
}
if (state() == kStateStarted) {
Inject(new Event(kSbEventTypePause, NULL, NULL));
Inject(event);
return true;
}
break;
case kSbEventTypeResume:
if (state() == kStateStarted || state() == kStatePaused) {
delete event;
return true;
}
break;
case kSbEventTypeStop:
if (state() == kStateStarted) {
Inject(new Event(kSbEventTypePause, NULL, NULL));
Inject(new Event(kSbEventTypeSuspend, NULL, NULL));
Inject(event);
return true;
}
if (state() == kStatePaused) {
Inject(new Event(kSbEventTypeSuspend, NULL, NULL));
Inject(event);
return true;
}
error_level_ = event->error_level;
break;
case kSbEventTypeScheduled: {
TimedEvent* timed_event =
reinterpret_cast<TimedEvent*>(event->event->data);
timed_event->callback(timed_event->context);
delete event;
return true;
}
default:
break;
}
SbEventHandle(event->event);
bool should_continue = true;
switch (event->event->type) {
case kSbEventTypePause:
SB_DCHECK(state() == kStateStarted);
state_ = kStatePaused;
break;
case kSbEventTypeUnpause:
SB_DCHECK(state() == kStatePaused);
state_ = kStateStarted;
break;
case kSbEventTypeSuspend:
SB_DCHECK(state() == kStatePaused);
state_ = kStateSuspended;
break;
case kSbEventTypeResume:
SB_DCHECK(state() == kStateSuspended);
state_ = kStatePaused;
break;
case kSbEventTypeStop:
SB_DCHECK(state() == kStateSuspended);
state_ = kStateStopped;
should_continue = false;
break;
default:
break;
}
delete event;
return should_continue;
}
} // namespace starboard
} // namespace shared
} // namespace starboard