summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--libs/binder/ndk/include_ndk/android/binder_parcel.h76
-rw-r--r--libs/binder/ndk/include_ndk/android/binder_parcel_utils.h40
-rw-r--r--libs/binder/ndk/libbinder_ndk.map.txt2
-rw-r--r--libs/binder/ndk/parcel.cpp47
4 files changed, 161 insertions, 4 deletions
diff --git a/libs/binder/ndk/include_ndk/android/binder_parcel.h b/libs/binder/ndk/include_ndk/android/binder_parcel.h
index 866af70157..7296d87588 100644
--- a/libs/binder/ndk/include_ndk/android/binder_parcel.h
+++ b/libs/binder/ndk/include_ndk/android/binder_parcel.h
@@ -151,6 +151,48 @@ typedef bool (*AParcel_stringArrayElementAllocator)(void* arrayData, size_t inde
typedef const char* (*AParcel_stringArrayElementGetter)(const void* arrayData, size_t index,
size_t* outLength);
+/**
+ * This is called to allocate an array of size 'length'. If length is -1, then a 'null' array (or
+ * equivalent) should be created.
+ *
+ * See also AParcel_readParcelableArray
+ *
+ * \param arrayData some external representation of an array
+ * \param length the length to allocate this array to
+ *
+ * \return true if allocation succeeded. If length is -1, a true return here means that a 'null'
+ * value (or equivalent) was successfully stored.
+ */
+typedef bool (*AParcel_parcelableArrayAllocator)(void* arrayData, int32_t length);
+
+/**
+ * This is called to parcel the underlying data from an arrayData object at index.
+ *
+ * See also AParcel_writeParcelableArray
+ *
+ * \param parcel parcel to write the parcelable to
+ * \param arrayData some external representation of an array of parcelables (a user-defined type).
+ * \param index the index of the value to be retrieved.
+ *
+ * \return status (usually returned from other parceling functions). STATUS_OK for success.
+ */
+typedef binder_status_t (*AParcel_writeParcelableElement)(AParcel* parcel, const void* arrayData,
+ size_t index);
+
+/**
+ * This is called to set an underlying value in an arrayData object at index.
+ *
+ * See also AParcel_readParcelableArray
+ *
+ * \param parcel parcel to read the parcelable from
+ * \param arrayData some external representation of an array of parcelables (a user-defined type).
+ * \param index the index of the value to be set.
+ *
+ * \return status (usually returned from other parceling functions). STATUS_OK for success.
+ */
+typedef binder_status_t (*AParcel_readParcelableElement)(const AParcel* parcel, void* arrayData,
+ size_t index);
+
// @START-PRIMITIVE-VECTOR-GETTERS
/**
* This is called to get the underlying data from an arrayData object.
@@ -497,6 +539,40 @@ binder_status_t AParcel_readStringArray(const AParcel* parcel, void* arrayData,
AParcel_stringArrayElementAllocator elementAllocator)
__INTRODUCED_IN(29);
+/**
+ * Writes an array of parcelables (user-defined types) to the next location in a non-null parcel.
+ *
+ * \param parcel the parcel to write to.
+ * \param arrayData an array of size 'length' (or null if length is -1, may be null if length is 0).
+ * \param length the length of arrayData or -1 if this represents a null array.
+ * \param elementWriter function to be called for every array index to write the user-defined type
+ * at that location.
+ *
+ * \return STATUS_OK on successful write.
+ */
+binder_status_t AParcel_writeParcelableArray(AParcel* parcel, const void* arrayData, int32_t length,
+ AParcel_writeParcelableElement elementWriter)
+ __INTRODUCED_IN(29);
+
+/**
+ * Reads an array of parcelables (user-defined types) from the next location in a non-null parcel.
+ *
+ * First, allocator will be called with the length of the array. If the allocation succeeds and the
+ * length is greater than zero, elementReader will be called for every index to read the
+ * corresponding parcelable.
+ *
+ * \param parcel the parcel to read from.
+ * \param arrayData some external representation of an array.
+ * \param allocator the callback that will be called to allocate the array.
+ * \param elementReader the callback that will be called to fill out individual elements.
+ *
+ * \return STATUS_OK on successful read.
+ */
+binder_status_t AParcel_readParcelableArray(const AParcel* parcel, void* arrayData,
+ AParcel_parcelableArrayAllocator allocator,
+ AParcel_readParcelableElement elementReader)
+ __INTRODUCED_IN(29);
+
// @START-PRIMITIVE-READ-WRITE
/**
* Writes int32_t value to the next location in a non-null parcel.
diff --git a/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h b/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h
index f99c3a92e2..53d6e9566a 100644
--- a/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h
+++ b/libs/binder/ndk/include_ndk/android/binder_parcel_utils.h
@@ -420,6 +420,46 @@ static inline binder_status_t AParcel_readVector(
AParcel_nullableStdVectorStringElementAllocator);
}
+/**
+ * Writes a parcelable object of type P inside a std::vector<P> at index 'index' to 'parcel'.
+ */
+template <typename P>
+binder_status_t AParcel_writeStdVectorParcelableElement(AParcel* parcel, const void* vectorData,
+ size_t index) {
+ const std::vector<P>* vector = static_cast<const std::vector<P>*>(vectorData);
+ return vector->at(index).writeToParcel(parcel);
+}
+
+/**
+ * Reads a parcelable object of type P inside a std::vector<P> at index 'index' from 'parcel'.
+ */
+template <typename P>
+binder_status_t AParcel_readStdVectorParcelableElement(const AParcel* parcel, void* vectorData,
+ size_t index) {
+ std::vector<P>* vector = static_cast<std::vector<P>*>(vectorData);
+ return vector->at(index).readFromParcel(parcel);
+}
+
+/**
+ * Convenience API for writing a std::vector<P>
+ */
+template <typename P>
+static inline binder_status_t AParcel_writeVector(AParcel* parcel, const std::vector<P>& vec) {
+ const void* vectorData = static_cast<const void*>(&vec);
+ return AParcel_writeParcelableArray(parcel, vectorData, vec.size(),
+ AParcel_writeStdVectorParcelableElement<P>);
+}
+
+/**
+ * Convenience API for reading a std::vector<P>
+ */
+template <typename P>
+static inline binder_status_t AParcel_readVector(const AParcel* parcel, std::vector<P>* vec) {
+ void* vectorData = static_cast<void*>(vec);
+ return AParcel_readParcelableArray(parcel, vectorData, AParcel_stdVectorExternalAllocator<P>,
+ AParcel_readStdVectorParcelableElement<P>);
+}
+
// @START
/**
* Writes a vector of int32_t to the next location in a non-null parcel.
diff --git a/libs/binder/ndk/libbinder_ndk.map.txt b/libs/binder/ndk/libbinder_ndk.map.txt
index 4328b6ea6d..ee7132f87f 100644
--- a/libs/binder/ndk/libbinder_ndk.map.txt
+++ b/libs/binder/ndk/libbinder_ndk.map.txt
@@ -40,6 +40,7 @@ LIBBINDER_NDK { # introduced=29
AParcel_readInt32Array;
AParcel_readInt64;
AParcel_readInt64Array;
+ AParcel_readParcelableArray;
AParcel_readParcelFileDescriptor;
AParcel_readStatusHeader;
AParcel_readString;
@@ -64,6 +65,7 @@ LIBBINDER_NDK { # introduced=29
AParcel_writeInt32Array;
AParcel_writeInt64;
AParcel_writeInt64Array;
+ AParcel_writeParcelableArray;
AParcel_writeParcelFileDescriptor;
AParcel_writeStatusHeader;
AParcel_writeString;
diff --git a/libs/binder/ndk/parcel.cpp b/libs/binder/ndk/parcel.cpp
index 2d68559395..39768557d4 100644
--- a/libs/binder/ndk/parcel.cpp
+++ b/libs/binder/ndk/parcel.cpp
@@ -377,11 +377,11 @@ binder_status_t AParcel_writeStringArray(AParcel* parcel, const void* arrayData,
if (length <= 0) return STATUS_OK;
for (size_t i = 0; i < length; i++) {
- size_t length = 0;
- const char* str = getter(arrayData, i, &length);
- if (str == nullptr && length != -1) return STATUS_BAD_VALUE;
+ size_t elementLength = 0;
+ const char* str = getter(arrayData, i, &elementLength);
+ if (str == nullptr && elementLength != -1) return STATUS_BAD_VALUE;
- binder_status_t status = AParcel_writeString(parcel, str, length);
+ binder_status_t status = AParcel_writeString(parcel, str, elementLength);
if (status != STATUS_OK) return status;
}
@@ -433,6 +433,45 @@ binder_status_t AParcel_readStringArray(const AParcel* parcel, void* arrayData,
return STATUS_OK;
}
+binder_status_t AParcel_writeParcelableArray(AParcel* parcel, const void* arrayData, int32_t length,
+ AParcel_writeParcelableElement elementWriter) {
+ // we have no clue if arrayData represents a null object or not, we can only infer from length
+ bool arrayIsNull = length < 0;
+ binder_status_t status = WriteAndValidateArraySize(parcel, arrayIsNull, length);
+ if (status != STATUS_OK) return status;
+ if (length <= 0) return STATUS_OK;
+
+ for (size_t i = 0; i < length; i++) {
+ binder_status_t status = elementWriter(parcel, arrayData, i);
+ if (status != STATUS_OK) return status;
+ }
+
+ return STATUS_OK;
+}
+
+binder_status_t AParcel_readParcelableArray(const AParcel* parcel, void* arrayData,
+ AParcel_parcelableArrayAllocator allocator,
+ AParcel_readParcelableElement elementReader) {
+ const Parcel* rawParcel = parcel->get();
+
+ int32_t length;
+ status_t status = rawParcel->readInt32(&length);
+
+ if (status != STATUS_OK) return PruneStatusT(status);
+ if (length < -1) return STATUS_BAD_VALUE;
+
+ if (!allocator(arrayData, length)) return STATUS_NO_MEMORY;
+
+ if (length == -1) return STATUS_OK; // null array
+
+ for (size_t i = 0; i < length; i++) {
+ binder_status_t status = elementReader(parcel, arrayData, i);
+ if (status != STATUS_OK) return status;
+ }
+
+ return STATUS_OK;
+}
+
// See gen_parcel_helper.py. These auto-generated read/write methods use the same types for
// libbinder and this library.
// @START
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-12-15 21:51:37 +0000