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-rw-r--r--libs/binder/ndk/include_cpp/android/binder_parcelable_utils.h91
-rw-r--r--libs/binder/ndk/include_ndk/android/binder_parcel.h47
-rw-r--r--libs/binder/ndk/libbinder_ndk.map.txt5
-rw-r--r--libs/binder/ndk/parcel.cpp18
4 files changed, 161 insertions, 0 deletions
diff --git a/libs/binder/ndk/include_cpp/android/binder_parcelable_utils.h b/libs/binder/ndk/include_cpp/android/binder_parcelable_utils.h
index 670151882f..5f2f3820a4 100644
--- a/libs/binder/ndk/include_cpp/android/binder_parcelable_utils.h
+++ b/libs/binder/ndk/include_cpp/android/binder_parcelable_utils.h
@@ -25,6 +25,8 @@
*/
#pragma once
+#include <android/binder_parcel_utils.h>
+#include <optional>
namespace ndk {
// Also see Parcelable.h in libbinder.
@@ -33,6 +35,95 @@ enum {
STABILITY_LOCAL,
STABILITY_VINTF, // corresponds to @VintfStability
};
+#define RETURN_ON_FAILURE(expr) \
+ do { \
+ binder_status_t _status = (expr); \
+ if (_status != STATUS_OK) return _status; \
+ } while (false)
+
+class AParcelableHolder {
+ public:
+ AParcelableHolder() = delete;
+ explicit AParcelableHolder(parcelable_stability_t stability)
+ : mParcel(AParcel_create()), mStability(stability) {}
+
+ virtual ~AParcelableHolder() = default;
+
+ binder_status_t writeToParcel(AParcel* parcel) const {
+ std::lock_guard<std::mutex> l(mMutex);
+ RETURN_ON_FAILURE(AParcel_writeInt32(parcel, static_cast<int32_t>(this->mStability)));
+ RETURN_ON_FAILURE(AParcel_writeInt32(parcel, AParcel_getDataSize(this->mParcel.get())));
+ RETURN_ON_FAILURE(AParcel_appendFrom(this->mParcel.get(), parcel, 0,
+ AParcel_getDataSize(this->mParcel.get())));
+ return STATUS_OK;
+ }
+
+ binder_status_t readFromParcel(const AParcel* parcel) {
+ std::lock_guard<std::mutex> l(mMutex);
+
+ AParcel_reset(mParcel.get());
+
+ RETURN_ON_FAILURE(AParcel_readInt32(parcel, &this->mStability));
+ int32_t dataSize;
+ binder_status_t status = AParcel_readInt32(parcel, &dataSize);
+
+ if (status != STATUS_OK || dataSize < 0) {
+ return status != STATUS_OK ? status : STATUS_BAD_VALUE;
+ }
+
+ int32_t dataStartPos = AParcel_getDataPosition(parcel);
+
+ if (dataStartPos > INT32_MAX - dataSize) {
+ return STATUS_BAD_VALUE;
+ }
+
+ status = AParcel_appendFrom(parcel, mParcel.get(), dataStartPos, dataSize);
+ if (status != STATUS_OK) {
+ return status;
+ }
+ return AParcel_setDataPosition(parcel, dataStartPos + dataSize);
+ }
+
+ template <typename T>
+ bool setParcelable(T* p) {
+ std::lock_guard<std::mutex> l(mMutex);
+ if (p && this->mStability > T::_aidl_stability) {
+ return false;
+ }
+ AParcel_reset(mParcel.get());
+ AParcel_writeString(mParcel.get(), T::descriptor, strlen(T::descriptor));
+ p->writeToParcel(mParcel.get());
+ return true;
+ }
+
+ template <typename T>
+ std::unique_ptr<T> getParcelable() const {
+ std::lock_guard<std::mutex> l(mMutex);
+ const std::string parcelableDesc(T::descriptor);
+ AParcel_setDataPosition(mParcel.get(), 0);
+ if (AParcel_getDataSize(mParcel.get()) == 0) {
+ return nullptr;
+ }
+ std::string parcelableDescInParcel;
+ binder_status_t status = AParcel_readString(mParcel.get(), &parcelableDescInParcel);
+ if (status != STATUS_OK || parcelableDesc != parcelableDescInParcel) {
+ return nullptr;
+ }
+ std::unique_ptr<T> ret = std::make_unique<T>();
+ status = ret->readFromParcel(this->mParcel.get());
+ if (status != STATUS_OK) {
+ return nullptr;
+ }
+ return std::move(ret);
+ }
+
+ private:
+ mutable ndk::ScopedAParcel mParcel;
+ mutable std::mutex mMutex;
+ parcelable_stability_t mStability;
+};
+
+#undef RETURN_ON_FAILURE
} // namespace ndk
/** @} */
diff --git a/libs/binder/ndk/include_ndk/android/binder_parcel.h b/libs/binder/ndk/include_ndk/android/binder_parcel.h
index a031e2973d..93c3f32100 100644
--- a/libs/binder/ndk/include_ndk/android/binder_parcel.h
+++ b/libs/binder/ndk/include_ndk/android/binder_parcel.h
@@ -1120,6 +1120,53 @@ binder_status_t AParcel_readByteArray(const AParcel* parcel, void* arrayData,
// @END-PRIMITIVE-READ-WRITE
#endif //__ANDROID_API__ >= 29
+#if __ANDROID_API__ >= 31
+/**
+ * Reset the parcel to the initial status.
+ *
+ * Available since API level 31.
+ *
+ * \param parcel The parcel of which to be reset.
+ *
+ * \return STATUS_OK on success.
+ */
+binder_status_t AParcel_reset(AParcel* parcel) __INTRODUCED_IN(31);
+
+/**
+ * Gets the size of the parcel.
+ *
+ * Available since API level 31.
+ *
+ * \param parcel The parcel of which to get the size.
+ *
+ * \return The size of the parcel.
+ */
+int32_t AParcel_getDataSize(const AParcel* parcel) __INTRODUCED_IN(31);
+
+/**
+ * Copy the data of a parcel to other parcel.
+ *
+ * Available since API level 31.
+ *
+ * \param from The source
+ * \param to The detination
+ * \param start The position where the copied data starts.
+ * \param size The amount of data which will be copied.
+ *
+ * \return STATUS_OK on success.
+ */
+binder_status_t AParcel_appendFrom(const AParcel* from, AParcel* to, int32_t start, int32_t size)
+ __INTRODUCED_IN(31);
+
+/**
+ * Creates a parcel.
+ *
+ * Available since API level 31.
+ *
+ * \return A parcel which is not related to any IBinder objects.
+ */
+AParcel* AParcel_create() __INTRODUCED_IN(31);
+#endif //__ANDROID_API__ >= 31
__END_DECLS
/** @} */
diff --git a/libs/binder/ndk/libbinder_ndk.map.txt b/libs/binder/ndk/libbinder_ndk.map.txt
index 1701fb5705..947cc98d55 100644
--- a/libs/binder/ndk/libbinder_ndk.map.txt
+++ b/libs/binder/ndk/libbinder_ndk.map.txt
@@ -120,6 +120,11 @@ LIBBINDER_NDK31 { # introduced=31
AServiceManager_isDeclared; # apex llndk
AServiceManager_registerLazyService; # llndk
AServiceManager_waitForService; # apex llndk
+
+ AParcel_reset;
+ AParcel_getDataSize;
+ AParcel_appendFrom;
+ AParcel_create;
};
LIBBINDER_NDK_PLATFORM {
diff --git a/libs/binder/ndk/parcel.cpp b/libs/binder/ndk/parcel.cpp
index 722ae232ed..2f95318874 100644
--- a/libs/binder/ndk/parcel.cpp
+++ b/libs/binder/ndk/parcel.cpp
@@ -647,4 +647,22 @@ bool AParcel_getAllowFds(const AParcel* parcel) {
return parcel->get()->allowFds();
}
+binder_status_t AParcel_reset(AParcel* parcel) {
+ parcel->get()->freeData();
+ return STATUS_OK;
+}
+
+int32_t AParcel_getDataSize(const AParcel* parcel) {
+ return parcel->get()->dataSize();
+}
+
+binder_status_t AParcel_appendFrom(const AParcel* from, AParcel* to, int32_t start, int32_t size) {
+ status_t status = to->get()->appendFrom(from->get(), start, size);
+ return PruneStatusT(status);
+}
+
+AParcel* AParcel_create() {
+ return new AParcel(nullptr);
+}
+
// @END
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-12-04 06:51:49 +0000