/// <summary>
/// This function allocates a new block of memory as a block of shared memory within the scope of the
/// specified context, in accordance with the parameters.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <param name="size">The size of shared memory.</param>
/// <param name="flags">The flags describing access modes (Input and/or Output).</param>
/// <returns>Returns the Shared Memory handler.</returns>
/// <privilege>http://tizen.org/privilege/tee.client</privilege>
/// <privlevel>partner</privlevel>
/// <feature>http://tizen.org/feature/security.tee</feature>
/// <exception cref="UnauthorizedAccessException">Thrown when an application does not have the privilege to access this method.</exception>
/// <exception cref="NotSupportedException">The required feature is not supported.</exception>
/// <exception cref="InvalidOperationException">The operation is invalid.</exception>
public SharedMemory AllocateSharedMemory(UInt32 size, SharedMemoryFlags flags)
{
SharedMemory sharedmem = new SharedMemory(this);
Interop.TEEC_SharedMemory shm = new Interop.TEEC_SharedMemory();
shm.size = (UIntPtr)size;
shm.flags = (UInt32)flags;
int ret = Interop.Libteec.AllocateSharedMemory(context_imp, ref shm);
Interop.CheckNThrowException(ret, "AllocateSharedMemory");
sharedmem.setShm(ref shm);
return(sharedmem);
}
/// <summary>
/// This function registers a block of the existing client application memory as a block of shared memory within
/// the scope of the specified context, in accordance with the parameters.
/// The input <paramref name="memaddr"/> must point to the shared memory region to register.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <param name="memaddr">The address of the shared memory.</param>
/// <param name="size">The size of the shared memory.</param>
/// <param name="flags">The flags describing the access modes (Input and/or Output).</param>
/// <returns>Returns the SharedMemory handler.</returns>
/// <privilege>http://tizen.org/privilege/tee.client</privilege>
/// <privlevel>partner</privlevel>
/// <feature>http://tizen.org/feature/security.tee</feature>
/// <exception cref="UnauthorizedAccessException">Thrown when an application does not have the privilege to access this method.</exception>
/// <exception cref="NotSupportedException">The required feature is not supported.</exception>
/// <exception cref="InvalidOperationException">The operation is invalid.</exception>
/// <exception cref="ArgumentException">The argument <paramref name="memaddr"/> is wrong.</exception>
public SharedMemory RegisterSharedMemory(IntPtr memaddr, UInt32 size, SharedMemoryFlags flags)
{
SharedMemory sharedmem = new SharedMemory(this);
Interop.TEEC_SharedMemory shm = new Interop.TEEC_SharedMemory();
shm.buffer = memaddr;
shm.size = (UIntPtr)size;
shm.flags = (UInt32)flags;
int ret = Interop.Libteec.RegisterSharedMemory(context_imp, ref shm);
Interop.CheckNThrowException(ret, "RegisterSharedMemory");
sharedmem.setShm(ref shm);
return(sharedmem);
}
/// <summary>
/// Constructs a parameter object which holds information about the registered memory shared with TA.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>http://tizen.org/privilege/tee.client</privilege>
/// <privlevel>partner</privlevel>
/// <param name="parent">The shared memory - registered or allocated.</param>
/// <param name="size">The size of the buffer part.</param>
/// <param name="offset">The offset of the buffer in the shared memory.</param>
/// <param name="type">The kind of access allowed for TA <see cref="TEFRegisteredMemoryType"/>.</param>
public RegisteredMemoryReference(SharedMemory parent, uint size, uint offset, TEFRegisteredMemoryType type) :
base(type)
{
this.Parent = parent;
if (type == TEFRegisteredMemoryType.Whole)
{
this.Size = parent.Size;
this.Offset = 0;
}
else
{
this.Size = size;
this.Offset = offset;
}
}
/// <summary>
/// This function deregisters or deallocates a previously initialized block of the shared memory.
/// </summary>
/// <remarks>
/// For a memory buffer allocated using AllocateSharedMemory, the implementation must free the
/// underlying memory and the client application must not access this region after this function has been
/// called. In this case, the implementation must clear the buffer and size fields of the shared memory
/// structure before returning.
/// For memory registered using RegisterSharedMemory, the implementation must deregister the
/// underlying memory from the TEE, but the memory region will stay available to the client application for
/// other purposes as the memory is owned by it.
/// </remarks>
/// <since_tizen> 3 </since_tizen>
/// <param name="shm">The shared memory object returned by RegisterSharedMemory or AllocateSharedMemory.</param>
/// <privilege>http://tizen.org/privilege/tee.client</privilege>
/// <privlevel>partner</privlevel>
/// <feature>http://tizen.org/feature/security.tee</feature>
/// <exception cref="UnauthorizedAccessException">Thrown when an application does not have the privilege to access this method.</exception>
/// <exception cref="NotSupportedException">The required feature is not supported.</exception>
/// <exception cref="InvalidOperationException">The operation is invalid.</exception>
/// <exception cref="ArgumentException">The argument is wrong.</exception>
public void ReleaseSharedMemory(SharedMemory shm)
{
Interop.Libteec.ReleaseSharedMemory(ref shm.shm);
}
/// <summary>
/// This function deregisters or deallocates a previously initialized block of the shared memory.
/// </summary>
/// <remarks>
/// For a memory buffer allocated using AllocateSharedMemory, the implementation must free the
/// underlying memory and the client application must not access this region after this function has been
/// called. In this case, the implementation must clear the buffer and size fields of the shared memory
/// structure before returning.
/// For memory registered using RegisterSharedMemory, the implementation must deregister the
/// underlying memory from the TEE, but the memory region will stay available to the client application for
/// other purposes as the memory is owned by it.
/// </remarks>
/// <since_tizen> 3 </since_tizen>
/// <param name="shm">The shared memory object returned by RegisterSharedMemory or AllocateSharedMemory.</param>
/// <privilege>http://tizen.org/privilege/tee.client</privilege>
/// <privlevel>partner</privlevel>
/// <feature>http://tizen.org/feature/security.tee</feature>
/// <exception cref="UnauthorizedAccessException">Thrown when an application does not have the privilege to access this method.</exception>
/// <exception cref="NotSupportedException">The required feature is not supported.</exception>
/// <exception cref="InvalidOperationException">The operation is invalid.</exception>
/// <exception cref="ArgumentException">The argument is wrong.</exception>
public void ReleaseSharedMemory(SharedMemory shm)
{
shm.Dispose();
}