From 67618c80483e01793351b20cbbbc5a56a6a8f016 Mon Sep 17 00:00:00 2001 From: jsdelfino Date: Mon, 14 Sep 2009 05:55:14 +0000 Subject: Utility functions and headers used by the sample store app, function objects, lists and strawman pointer utils. Started to implement a generic value holder object that can help exchange data with scripting components. git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@814481 13f79535-47bb-0310-9956-ffa450edef68 --- cpp/sca/runtime/core/src/tuscany/function.hpp | 235 ++++++++++++++++++++++++++ 1 file changed, 235 insertions(+) create mode 100644 cpp/sca/runtime/core/src/tuscany/function.hpp (limited to 'cpp/sca/runtime/core/src/tuscany/function.hpp') diff --git a/cpp/sca/runtime/core/src/tuscany/function.hpp b/cpp/sca/runtime/core/src/tuscany/function.hpp new file mode 100644 index 0000000000..e0e8889dad --- /dev/null +++ b/cpp/sca/runtime/core/src/tuscany/function.hpp @@ -0,0 +1,235 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +/* $Rev$ $Date$ */ + +#ifndef tuscany_function_hpp +#define tuscany_function_hpp + +/** + * Lambda function type, used to represent service operations. + */ + +#include +#include "gc.hpp" + +using std::ostream; + +namespace tuscany { + +/** + * Debug counters. + */ +long int countProxies; +long int countFProxies = 0; +long int countCProxies = 0; +long int countLambdas = 0; +long int countELambdas = 0; +long int countCLambdas = 0; +long int countFLambdas = 0; + +bool resetLambdaCounters() { + countLambdas = countELambdas = countCLambdas = countFLambdas = countProxies = countFProxies = countCProxies = 0; + return true; +} + +bool printLambdaCounters() { + using std::cout; + using std::endl; + cout << "countLambdas " << countLambdas << endl; + cout << "countELambdas " << countELambdas << endl; + cout << "countFLambdas " << countFLambdas << endl; + cout << "countCLambdas " << countCLambdas << endl; + cout << "countProxies " << countProxies << endl; + cout << "countFProxies " << countFProxies << endl; + cout << "countCProxies " << countCProxies << endl; + return true; +} + +/** + * Lambda function type. + */ + +template class Callable { +public: + unsigned int refCount; + + Callable() : refCount(0) { + } + + virtual const int size() const = 0; + + virtual const R operator()(P... p) const = 0; + + virtual ~Callable() { + } + + unsigned int acquire() { + return ++refCount; + } + + unsigned int release() { + return --refCount; + } + + template class Proxy: public Callable { + public: + explicit Proxy(const F& f) : function(f) { + countProxies++; + countFProxies ++; + } + + Proxy(const Proxy& p) : function(p.function) { + countProxies++; + countCProxies ++; + } + + ~Proxy() { + countProxies--; + } + + virtual const R operator() (P... p) const { + return function(std::forward

(p)...); + } + + virtual const int size() const { + return sizeof(function); + } + + private: + const F function; + }; + +}; + +template class lambda; + +template class lambda { +public: + lambda() : callable(0) { + countLambdas++; + countELambdas++; + } + + template explicit lambda(const F f) : callable(0) { + typedef typename CallableType::template Proxy ProxyType; + + countLambdas++; + countFLambdas++; + callable = gc_counting_ptr(new ProxyType(f)); + } + + lambda(const lambda& l) { + countLambdas++; + countCLambdas++; + callable = l.callable; + } + + const lambda& operator=(const lambda& l) { + if (this == &l) + return *this; + callable = l.callable; + return *this; + } + + ~lambda() { + countLambdas--; + } + + const bool operator==(const lambda& l) const { + if (this == &l) + return true; + return callable == l.callable; + } + + const bool operator!=(const lambda& l) const { + return !this->operator==(l); + } + + const R operator()(P... p) const { + return (*callable)(std::forward

(p)...); + } + + template friend ostream& operator<<(ostream&, const lambda&); + +private: + typedef Callable CallableType; + gc_counting_ptr callable; +}; + +template ostream& operator<<(ostream& out, const lambda& l) { + return out << "lambda::" << l.callable; +} + +/** + * Creates a lambda function from a pointer to a function. + */ +template lambda makeLambda(const R (* const f)(P...)) { + return lambda(f); +} + +/** + * Curry a lambda function. + */ +template class Curried { +private: + const T v; + const lambdaf; + +public: + Curried(const lambda& f, const T& v): v(v), f(f) { + } + + const R operator()(P... p) const { + return f(v, std::forward

(p)...); + } + +}; + +template const lambda curry(const lambda& f, const T& t) { + return (lambda)Curried(f, t); +} + +template const lambda curry(const lambda& f, const T& t, const U& u) { + return curry(curry(f, t), u); +} + +template const lambda curry(const lambda& f, const T& t, const U& u, const V& v) { + return curry(curry(curry(f, t), u), v); +} + +/** + * A lambda function that returns the given value. + */ +template struct unitReturn { + const T v; + unitReturn(const T& v) : + v(v) { + } + const T operator()() const { + return v; + } +}; + +template const lambda unit(const T& v) { + return lambda (unitReturn (v)); +} + +} +#endif /* tuscany_function_hpp */ -- cgit v1.2.3