AFEPack
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ĿΪܹȽϷAFEPackʹPOSIX߳ṩһӿڡ 更多...
#include <ThreadBase.h>
ĿΪܹȽϷAFEPackʹPOSIX߳ṩһӿڡ
ʵֱȽϸӣҪǽdeal.IIйڶֵ֧߳ķdz ˽еļȥοĵѧϰһ¿C++ˮƽ пյʱȥһۡдñȽѶ鲻Ҫҵ룬˷ʱ䡣 ˣ˵ˮƽҸߣ;-)⣬Ҳṩκι̰߳ȫԷ ı֤ȫԼĴȥʵˡ
deal.IIеĶ߳ACE ֱԼдһȽϼ̹߳Ҫ˵һʹõķڴ û˵Ѿ㹻ˡ̵֧֣߳㷽IJһ̣߳Эͬ һȽϴ̵߳ڳԱҲԲԱ ڳԱ÷
̵߳ںiChebyshevʽڵ0.64ֵ void fun(int i, const double& d) { d = cos(i*acos(0.64)); }; int main(int argc, char * argv[]) { double val[5]; ThreadManager th_man; ̹߳ for (int i = 0;i < 5;i ++) { Ǵ5߳ ̣߳ʵеܶһ th_man.start(encapsulate(&fun).collectArgs(i, val[i])); } th_man.join(encapsulate(&fun)); ȴ߳̽ һʵֵ÷dzѿʵûа취 ʲôУθ for (int i = 0;i < 5;i ++) { std::cout << "Chebyshev(" << i << ", 0.64) = " << val[i] << std::endl; } return 0; };
ԱںȻһһҪѶ ȥӣ
class Chebyshev { private: double x; public: ̵߳ںǹе Chebyshev(const double& _x) : x(_x) {}; void fun(int i, const double& d) { d = cos(i*acos(x)); }; }; int main(int argc, char * argv[]) { double val[5]; Chebyshev ch(0.64); Ķ ThreadManager th_man; ̹߳ for (int i = 0;i < 5;i ++) { Ǵ5߳ ̣߳ҪѶȥ th_man.start(encapsulate(&Chebyshev::fun).collectArgs(&ch, i, val[i])); } th_man.join(encapsulate(&Chebyshev::fun)); ȴ߳̽ for (int i = 0;i < 5;i ++) { std::cout << "Chebyshev(" << i << ", 0.64) = " << val[i] << std::endl; } return 0; };
ʵ֣ΨһĿΪʹ㡣
ڽԪʱʵֵһ
setThread(n); n>1
ôڽԪռĹʱһִʹö߳̽УԺ һὫIJֽж̻߳Ҫʱ䣬ĵȴŶ
ʹAFEPackдԪijĺ
void fun() { FEMSpace<double,DIM>::ElementIterator the_ele = fem_space.beginElement(); FEMSpace<double,DIM>::ElementIterator end_ele = fem_space.endElement(); for (;the_ele != end_ele;++ the_ele) { ... ... ǻԪϽһȽϸӵֵֵIJ } }; ĵطǵ fun();
һγǾͿʹķʽж̻߳ˣ
void fun(int rank, int n_thread) { int n_element = fem_space.n_elemen(); FEMSpace<double,DIM>::ElementIterator the_ele = fem_space.beginElement(); FEMSpace<double,DIM>::ElementIterator end_ele = fem_space.endElement(); int stride = n_element/n_thread; the_ele += stride*rank; if (rank + 1 < n_thread) end_ele = the_ele + stride; for (;the_ele != end_ele;++ the_ele) { ֻһֵԪ ... ... ԪϽһȽϸӵֵֵIJ } }; Ȼʱĵطһ int n_thread = getThread(); ThreadManager th_man; for (int rank = 1;rank < n_thread;rank ++) { һ߳ th_man.start(encapsulate(&fun).collectArgs(rank, n_thread)); } fun(0, n_thread); ԼҲҪ th_man.join(encapsulate(&fun)); Ź
Լʹ÷ʽDZȽϷģ;-)