void BpMemoryHeap::assertReallyMapped() const
{
if (mHeapId == -1) {
// remote call without mLock held, worse case scenario, we end up
// calling transact() from multiple threads, but that's not a problem,
// only mmap below must be in the critical section.
Parcel data, reply;
data.writeInterfaceToken(IMemoryHeap::getInterfaceDescriptor());
status_t err = remote()->transact(HEAP_ID, data, &reply);
int parcel_fd = reply.readFileDescriptor();
ssize_t size = reply.readInt32();
uint32_t flags = reply.readInt32();
#ifndef BINDER_COMPAT
uint32_t offset = reply.readInt32();
#else
uint32_t offset = 0;
#endif
ALOGE_IF(err, "binder=%p transaction failed fd=%d, size=%ld, err=%d (%s)",
asBinder().get(), parcel_fd, size, err, strerror(-err));
int fd = dup( parcel_fd );
ALOGE_IF(fd==-1, "cannot dup fd=%d, size=%ld, err=%d (%s)",
parcel_fd, size, err, strerror(errno));
int access = PROT_READ;
if (!(flags & READ_ONLY)) {
access |= PROT_WRITE;
}
Mutex::Autolock _l(mLock);
if (mHeapId == -1) {
mRealHeap = true;
mBase = mmap(0, size, access, MAP_SHARED, fd, offset);
if (mBase == MAP_FAILED) {
ALOGE("cannot map BpMemoryHeap (binder=%p), size=%ld, fd=%d (%s)",
asBinder().get(), size, fd, strerror(errno));
close(fd);
} else {
mSize = size;
mFlags = flags;
#ifndef BINDER_COMPAT
mOffset = offset;
#endif
android_atomic_write(fd, &mHeapId);
}
}
}
}
MonitoredProducer::~MonitoredProducer() {
// Remove ourselves from SurfaceFlinger's list. We do this asynchronously
// because we don't know where this destructor is called from. It could be
// called with the mStateLock held, leading to a dead-lock (it actually
// happens).
class MessageCleanUpList : public MessageBase {
public:
MessageCleanUpList(const sp<SurfaceFlinger>& flinger,
const wp<IBinder>& producer)
: mFlinger(flinger), mProducer(producer) {}
virtual ~MessageCleanUpList() {}
virtual bool handler() {
Mutex::Autolock _l(mFlinger->mStateLock);
mFlinger->mGraphicBufferProducerList.remove(mProducer);
return true;
}
private:
sp<SurfaceFlinger> mFlinger;
wp<IBinder> mProducer;
};
mFlinger->postMessageAsync(new MessageCleanUpList(mFlinger, asBinder()));
}
