uint32_t
MsaaIdGenerator::GetID()
{
uint32_t id = mIDSet.GetID();
MOZ_ASSERT(id <= ((1UL << kNumUniqueIDBits) - 1UL));
return detail::BuildMsaaID(id, ResolveContentProcessID());
}
bool
MsaaIdGenerator::IsIDForThisContentProcess(uint32_t aID)
{
MOZ_ASSERT(XRE_IsContentProcess());
detail::MsaaIDCracker cracked(aID);
return cracked.GetContentProcessId() == ResolveContentProcessID();
}
bool
MsaaIdGenerator::ReleaseID(uint32_t aID)
{
MOZ_ASSERT(aID != AccessibleWrap::kNoID);
detail::MsaaIDCracker cracked(aID);
if (cracked.GetContentProcessId() != ResolveContentProcessID()) {
return false;
}
mIDSet.ReleaseID(cracked.GetUniqueId());
return true;
}
void
MsaaIdGenerator::ReleaseID(AccessibleWrap* aAccWrap)
{
MOZ_ASSERT(aAccWrap);
uint32_t id = aAccWrap->GetExistingID();
MOZ_ASSERT(id != AccessibleWrap::kNoID);
detail::MsaaIDCracker cracked(id);
if (cracked.GetContentProcessId() != ResolveContentProcessID()) {
// This may happen if chrome holds a proxy whose ID was originally generated
// by a content process. Since ReleaseID only has meaning in the process
// that originally generated that ID, we ignore ReleaseID calls for any ID
// that did not come from the current process.
MOZ_ASSERT(aAccWrap->IsProxy());
return;
}
mIDSet.ReleaseID(cracked.GetUniqueId());
}
