/// <summary>
/// Creates a new instance of a Barista Runtime.
/// </summary>
public BaristaRuntime(IJavaScriptEngine engine, IBaristaContextFactory contextFactory, JavaScriptRuntimeSafeHandle runtimeHandle)
: base(engine, runtimeHandle)
{
m_contextFactory = contextFactory ?? throw new ArgumentNullException(nameof(contextFactory));
JavaScriptMemoryAllocationCallback runtimeMemoryAllocationChanging = (IntPtr callbackState, JavaScriptMemoryEventType allocationEvent, UIntPtr allocationSize) =>
{
try
{
return(OnRuntimeMemoryAllocationChanging(callbackState, allocationEvent, allocationSize));
}
catch
{
//Do Nothing.
return(true);
}
};
m_runtimeMemoryAllocationChangingDelegateHandle = GCHandle.Alloc(runtimeMemoryAllocationChanging);
Engine.JsSetRuntimeMemoryAllocationCallback(runtimeHandle, IntPtr.Zero, runtimeMemoryAllocationChanging);
JavaScriptBeforeCollectCallback beforeCollectCallback = (IntPtr callbackState) =>
{
try
{
OnBeforeCollect(IntPtr.Zero, callbackState);
}
catch
{
//Do Nothing.
}
};
m_beforeCollectCallbackDelegateHandle = GCHandle.Alloc(beforeCollectCallback);
Engine.JsSetRuntimeBeforeCollectCallback(runtimeHandle, IntPtr.Zero, beforeCollectCallback);
}
internal static extern JavaScriptErrorCode JsSetRuntimeMemoryAllocationCallback(JavaScriptRuntime runtime, IntPtr callbackState, JavaScriptMemoryAllocationCallback allocationCallback);
internal static extern JavaScriptErrorCode JsSetRuntimeMemoryAllocationCallback(JavaScriptRuntime runtime, IntPtr callbackState, JavaScriptMemoryAllocationCallback allocationCallback);
/// <summary>
/// Sets a memory allocation callback for specified runtime
/// </summary>
/// <remarks>
/// <para>
/// Registering a memory allocation callback will cause the runtime to call back to the host
/// whenever it acquires memory from, or releases memory to, the OS. The callback routine is
/// called before the runtime memory manager allocates a block of memory. The allocation will
/// be rejected if the callback returns false. The runtime memory manager will also invoke the
/// callback routine after freeing a block of memory, as well as after allocation failures.
/// </para>
/// <para>
/// The callback is invoked on the current runtime execution thread, therefore execution is
/// blocked until the callback completes.
/// </para>
/// <para>
/// The return value of the callback is not stored; previously rejected allocations will not
/// prevent the runtime from invoking the callback again later for new memory allocations.
/// </para>
/// </remarks>
/// <param name="callbackState">
/// User provided state that will be passed back to the callback.
/// </param>
/// <param name="allocationCallback">
/// Memory allocation callback to be called for memory allocation events.
/// </param>
public void SetMemoryAllocationCallback(IntPtr callbackState, JavaScriptMemoryAllocationCallback allocationCallback)
{
Native.ThrowIfError(Native.JsSetRuntimeMemoryAllocationCallback(this, callbackState, allocationCallback));
}
/// <summary>
/// Sets a memory allocation callback for specified runtime
/// </summary>
/// <remarks>
/// <para>
/// Registering a memory allocation callback will cause the runtime to call back to the host
/// whenever it acquires memory from, or releases memory to, the OS. The callback routine is
/// called before the runtime memory manager allocates a block of memory. The allocation will
/// be rejected if the callback returns false. The runtime memory manager will also invoke the
/// callback routine after freeing a block of memory, as well as after allocation failures.
/// </para>
/// <para>
/// The callback is invoked on the current runtime execution thread, therefore execution is
/// blocked until the callback completes.
/// </para>
/// <para>
/// The return value of the callback is not stored; previously rejected allocations will not
/// prevent the runtime from invoking the callback again later for new memory allocations.
/// </para>
/// </remarks>
/// <param name="callbackState">
/// User provided state that will be passed back to the callback.
/// </param>
/// <param name="allocationCallback">
/// Memory allocation callback to be called for memory allocation events.
/// </param>
public void SetMemoryAllocationCallback(IntPtr callbackState, JavaScriptMemoryAllocationCallback allocationCallback)
{
Native.ThrowIfError(Native.JsSetRuntimeMemoryAllocationCallback(this, callbackState, allocationCallback));
}