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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "config.h" | |
| 6 #include "bindings/core/dart/DartScriptPromiseResolver.h" | |
| 7 | |
| 8 #include "bindings/common/ScriptPromiseResolverIncludes.h" | |
| 9 | |
| 10 namespace blink { | |
| 11 | |
| 12 DartScriptPromiseResolver::DartScriptPromiseResolver(DartScriptState* scriptStat
e, ScriptPromiseResolver* owner) | |
| 13 : AbstractScriptPromiseResolver() | |
| 14 , m_state(Pending) | |
| 15 , m_scriptState(scriptState) | |
| 16 , m_owner(owner) | |
| 17 , m_mode(Default) | |
| 18 , m_timer(this, &DartScriptPromiseResolver::onTimerFired) | |
| 19 , m_completer() | |
| 20 #if ENABLE(ASSERT) | |
| 21 , m_isPromiseCalled(false) | |
| 22 #endif | |
| 23 { | |
| 24 Dart_Handle asyncLib = Dart_LookupLibrary(Dart_NewStringFromCString("dart:as
ync")); | |
| 25 Dart_Handle completerClass = Dart_GetType(asyncLib, Dart_NewStringFromCStrin
g("Completer"), 0, 0); | |
| 26 Dart_Handle completer = Dart_New(completerClass, Dart_NewStringFromCString("
"), 0, 0); | |
| 27 m_completer = Dart_NewPersistentHandle(completer); | |
| 28 | |
| 29 if (executionContext()->activeDOMObjectsAreStopped()) | |
| 30 m_state = ResolvedOrRejected; | |
| 31 } | |
| 32 | |
| 33 #define DEFINE_RESOLUTION_METHODS(type) \ | |
| 34 void DartScriptPromiseResolver::resolve(type value) { resolveInternal(value); }
\ | |
| 35 void DartScriptPromiseResolver::reject(type error) { rejectInternal(error); } | |
| 36 PROMISE_RESOLUTION_TYPES_LIST(DEFINE_RESOLUTION_METHODS); | |
| 37 #undef DEFINE_RESOLUTION_METHODS | |
| 38 | |
| 39 void DartScriptPromiseResolver::suspend() | |
| 40 { | |
| 41 m_timer.stop(); | |
| 42 } | |
| 43 | |
| 44 void DartScriptPromiseResolver::resume() | |
| 45 { | |
| 46 if (m_state == Resolving || m_state == Rejecting) | |
| 47 m_timer.startOneShot(0, FROM_HERE); | |
| 48 } | |
| 49 | |
| 50 void DartScriptPromiseResolver::stop() | |
| 51 { | |
| 52 m_timer.stop(); | |
| 53 clear(); | |
| 54 } | |
| 55 | |
| 56 void DartScriptPromiseResolver::keepAliveWhilePending() | |
| 57 { | |
| 58 if (m_state == ResolvedOrRejected || m_mode == KeepAliveWhilePending) | |
| 59 return; | |
| 60 | |
| 61 // Keep |this| while the promise is Pending. | |
| 62 // deref() will be called in clear(). | |
| 63 m_mode = KeepAliveWhilePending; | |
| 64 m_owner->ref(); | |
| 65 } | |
| 66 | |
| 67 void DartScriptPromiseResolver::onTimerFired(Timer<DartScriptPromiseResolver>*) | |
| 68 { | |
| 69 ASSERT(m_state == Resolving || m_state == Rejecting); | |
| 70 DartIsolateScope scope(m_scriptState->isolate()); | |
| 71 DartApiScope apiScope; | |
| 72 // FIXMEDART: Remove this. | |
| 73 V8ScriptState::Scope v8Scope(m_scriptState->v8ScriptState()); | |
| 74 resolveOrRejectImmediately(); | |
| 75 } | |
| 76 | |
| 77 void DartScriptPromiseResolver::resolveOrRejectImmediately() | |
| 78 { | |
| 79 ASSERT(!executionContext()->activeDOMObjectsAreStopped()); | |
| 80 ASSERT(!executionContext()->activeDOMObjectsAreSuspended()); | |
| 81 { | |
| 82 if (m_state == Resolving) { | |
| 83 Dart_Handle value = Dart_HandleFromPersistent(m_value); | |
| 84 Dart_Invoke(m_completer, Dart_NewStringFromCString("complete"), 1, &
value); | |
| 85 } else { | |
| 86 ASSERT(m_state == Rejecting); | |
| 87 Dart_Handle error = Dart_HandleFromPersistent(m_value); | |
| 88 Dart_Invoke(m_completer, Dart_NewStringFromCString("completeError"),
1, &error); | |
| 89 } | |
| 90 } | |
| 91 clear(); | |
| 92 } | |
| 93 | |
| 94 void DartScriptPromiseResolver::clear() | |
| 95 { | |
| 96 if (m_state == ResolvedOrRejected) | |
| 97 return; | |
| 98 ResolutionState state = m_state; | |
| 99 m_state = ResolvedOrRejected; | |
| 100 Dart_DeletePersistentHandle(m_completer); | |
| 101 Dart_DeletePersistentHandle(m_value); | |
| 102 | |
| 103 if (m_mode == KeepAliveWhilePending) { | |
| 104 // |ref| was called in |keepAliveWhilePending|. | |
| 105 m_owner->deref(); | |
| 106 } | |
| 107 // |this| may be deleted here, but it is safe to check |state| because | |
| 108 // it doesn't depend on |this|. When |this| is deleted, |state| can't be | |
| 109 // |Resolving| nor |Rejecting| and hence |this->deref()| can't be executed. | |
| 110 if (state == Resolving || state == Rejecting) { | |
| 111 // |ref| was called in |resolveOrReject|. | |
| 112 m_owner->deref(); | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 } // namespace blink | |
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