Transfer large bitmaps using ashmem.
Bug: 5224703
Change-Id: If385a66adf4c6179a0bb49c0e6d09a9567e23808
diff --git a/include/binder/Parcel.h b/include/binder/Parcel.h
index 57f5dd2..d973785 100644
--- a/include/binder/Parcel.h
+++ b/include/binder/Parcel.h
@@ -38,6 +38,9 @@
class Parcel
{
public:
+ class ReadableBlob;
+ class WritableBlob;
+
Parcel();
~Parcel();
@@ -111,7 +114,13 @@
// Place a file descriptor into the parcel. A dup of the fd is made, which
// will be closed once the parcel is destroyed.
status_t writeDupFileDescriptor(int fd);
-
+
+ // Writes a blob to the parcel.
+ // If the blob is small, then it is stored in-place, otherwise it is
+ // transferred by way of an anonymous shared memory region.
+ // The caller should call release() on the blob after writing its contents.
+ status_t writeBlob(size_t len, WritableBlob* outBlob);
+
status_t writeObject(const flat_binder_object& val, bool nullMetaData);
// Like Parcel.java's writeNoException(). Just writes a zero int32.
@@ -159,7 +168,11 @@
// Retrieve a file descriptor from the parcel. This returns the raw fd
// in the parcel, which you do not own -- use dup() to get your own copy.
int readFileDescriptor() const;
-
+
+ // Reads a blob from the parcel.
+ // The caller should call release() on the blob after reading its contents.
+ status_t readBlob(size_t len, ReadableBlob* outBlob) const;
+
const flat_binder_object* readObject(bool nullMetaData) const;
// Explicitly close all file descriptors in the parcel.
@@ -179,7 +192,7 @@
release_func relFunc, void* relCookie);
void print(TextOutput& to, uint32_t flags = 0) const;
-
+
private:
Parcel(const Parcel& o);
Parcel& operator=(const Parcel& o);
@@ -218,6 +231,36 @@
release_func mOwner;
void* mOwnerCookie;
+
+ class Blob {
+ public:
+ Blob();
+ ~Blob();
+
+ void release();
+ inline size_t size() const { return mSize; }
+
+ protected:
+ void init(bool mapped, void* data, size_t size);
+ void clear();
+
+ bool mMapped;
+ void* mData;
+ size_t mSize;
+ };
+
+public:
+ class ReadableBlob : public Blob {
+ friend class Parcel;
+ public:
+ inline const void* data() const { return mData; }
+ };
+
+ class WritableBlob : public Blob {
+ friend class Parcel;
+ public:
+ inline void* data() { return mData; }
+ };
};
// ---------------------------------------------------------------------------