Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0c7e7c88 authored by Treehugger Robot's avatar Treehugger Robot Committed by Automerger Merge Worker
Browse files

Merge "Add SharedMemory.fromFileDescriptor" am: d0792368 am: b2cb2c79 am:... 

Merge "Add SharedMemory.fromFileDescriptor" am: d0792368 am: b2cb2c79 am: 3950828a am: f8029596

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1775625

Change-Id: I8717effee98ca093eac698bf146a426910d69ce0
parents b5f57d99 f8029596

core/api/current.txt

+1 −0
Original line number Diff line number Diff line
@@ -31833,6 +31833,7 @@ package android.os { 
    method public void close();

    method @NonNull public static android.os.SharedMemory create(@Nullable String, int) throws android.system.ErrnoException;

    method public int describeContents();

    method @NonNull public static android.os.SharedMemory fromFileDescriptor(@NonNull android.os.ParcelFileDescriptor);

    method public int getSize();

    method @NonNull public java.nio.ByteBuffer map(int, int, int) throws android.system.ErrnoException;

    method @NonNull public java.nio.ByteBuffer mapReadOnly() throws android.system.ErrnoException;

core/java/android/os/SharedMemory.java

+20 −0
Original line number Diff line number Diff line
@@ -93,6 +93,26 @@ public final class SharedMemory implements Parcelable, Closeable { 
        }

    }



    /**

     * Creates an instance from existing shared memory passed as {@link ParcelFileDescriptor}.

     *

     * <p> The {@code fd} should be a shared memory created from

       {@code SharedMemory or ASharedMemory}. This can be useful when shared memory is passed as

       file descriptor through JNI or binder service implemented in cpp.

     * <p> Note that newly created {@code SharedMemory} takes ownership of passed {@code fd} and

     * the original {@code fd} becomes detached (Check {@link ParcelFileDescriptor#detachFd()}).

     * If the caller wants to use the file descriptor after the call, the caller should duplicate

     * the file descriptor (Check {@link ParcelFileDescriptor#dup()}) and pass the duped version

     * instead.

     *

     * @param fd File descriptor of shared memory passed as {@link ParcelFileDescriptor}.

     */

    public static @NonNull SharedMemory fromFileDescriptor(@NonNull ParcelFileDescriptor fd) {

        FileDescriptor f = new FileDescriptor();

        f.setInt$(fd.detachFd());

        return new SharedMemory(f);

    }



    private static final int PROT_MASK = OsConstants.PROT_READ | OsConstants.PROT_WRITE

            | OsConstants.PROT_EXEC | OsConstants.PROT_NONE;