本文整理汇总了C++中ArenaHeader::isEmpty方法的典型用法代码示例。如果您正苦于以下问题：C++ ArenaHeader::isEmpty方法的具体用法？C++ ArenaHeader::isEmpty怎么用？C++ ArenaHeader::isEmpty使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ArenaHeader的用法示例。
在下文中一共展示了ArenaHeader::isEmpty方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1:
TenuredCell *
ArenaLists::allocateFromArena(JS::Zone *zone, AllocKind thingKind,
AutoMaybeStartBackgroundAllocation &maybeStartBGAlloc)
{
JSRuntime *rt = zone->runtimeFromAnyThread();
Maybe<AutoLockGC> maybeLock;
// See if we can proceed without taking the GC lock.
if (backgroundFinalizeState[thingKind] != BFS_DONE)
maybeLock.emplace(rt);
ArenaList &al = arenaLists[thingKind];
ArenaHeader *aheader = al.takeNextArena();
if (aheader) {
// Empty arenas should be immediately freed.
MOZ_ASSERT(!aheader->isEmpty());
return allocateFromArenaInner<HasFreeThings>(zone, aheader, thingKind);
}
// Parallel threads have their own ArenaLists, but chunks are shared;
// if we haven't already, take the GC lock now to avoid racing.
if (maybeLock.isNothing())
maybeLock.emplace(rt);
Chunk *chunk = rt->gc.pickChunk(maybeLock.ref(), maybeStartBGAlloc);
if (!chunk)
return nullptr;
// Although our chunk should definitely have enough space for another arena,
// there are other valid reasons why Chunk::allocateArena() may fail.
aheader = rt->gc.allocateArena(chunk, zone, thingKind, maybeLock.ref());
if (!aheader)
return nullptr;
MOZ_ASSERT(!maybeLock->wasUnlocked());
MOZ_ASSERT(al.isCursorAtEnd());
al.insertAtCursor(aheader);
return allocateFromArenaInner<IsEmpty>(zone, aheader, thingKind);
}