Operation.h

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/*
 * Objectively: Ultra-lightweight object oriented framework for GNU C.
 * Copyright (C) 2014 Jay Dolan <jay@jaydolan.com>
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 */
 
#pragma once
 
#include <Objectively/Array.h>
#include <Objectively/Condition.h>
#include <Objectively/Object.h>
#include <Objectively/Thread.h>
 
typedef struct Operation Operation;
typedef struct OperationInterface OperationInterface;
 
typedef struct OperationQueue OperationQueue;
 
typedef void (*OperationFunction)(Operation *operation);
 
struct Operation {
 
  Object object;
 
  OperationInterface *interface;
 
  struct {
    Condition *condition;
 
    Array *dependencies;
 
    OperationQueue *queue;
  } locals;
 
  bool asynchronous;
 
  ident data;
 
  OperationFunction function;
 
  bool isCancelled;
  
  bool isDispatched;
 
  bool isExecuting;
 
  bool isFinished;
};
 
struct OperationInterface {
 
  ObjectInterface objectInterface;
 
  void (*addDependency)(Operation *self, Operation *dependency);
 
  void (*cancel)(Operation *self);
 
  Array *(*dependencies)(const Operation *self);
 
  Operation *(*init)(Operation *self);
 
  Operation *(*initWithFunction)(Operation *self, OperationFunction function, ident data);
 
  bool (*isReady)(const Operation *self);
 
  void (*removeDependency)(Operation *self, Operation *dependency);
 
  void (*start)(Operation *self);
 
  void (*waitUntilFinished)(const Operation *self);
};
 
OBJECTIVELY_EXPORT Class *_Operation(void);