WindowsAPI函数存储管理.rar_内存管理_内存管理函数

////////////////////////////////////////////////////////////////////////////////////////////// //本程序是内存管理操作的实习程序。 //本程序使用Windows 2000/XP的API函数，实现一个包含两个线程的进程，Stimulator线程用于模拟内存分配 //活动，Mornitor线程用于跟踪Stimulator的内存模拟行为，两个进程之间通过信号量stimulator和mornitor //实现同步，并且Stimulator所执行的操作由函数GenerateOperation()即时生成 ////////////////////////////////////////////////////////////////////////////////////////////// #include<stdio.h> #include<stdlib.h> #include<windows.h> #include<winbase.h> #include<iostream.h> HANDLE stimulator,mornitor; //内存分配模拟线程、及其监测线程实现同步操作所用的信号量句柄 struct Operation { int lastTime; //操作的持续时间 int blockSize; //内存页数 int operation; //操作类型 int protection; //权限权限 }; ////////////////////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////////////////////// void GenerateOperation(Operation& op) {//本函数生成要求进行的内存操作，通过引用返回操作类型 //操作类型顺序由:保留－提交－加锁－解锁－回收－释放,并按此循环 //操作权限由函数rand()随机生成 static int oper=0; //注:oper代表当次要进行的内存操作的类型 //用数字操作意义:0－保留；1－提交；2－加锁；3－解锁；4－回收；5－释放 op.lastTime=rand()%1000; //生成操作的持续时间 op.blockSize=rand()%7+1; //生成分配的内存块大小 op.operation=oper++; //指定操作的类型 //用数字代表操作权限: //0－PAGE_READONLY //1－PAGE_READWRITE //2－PAGE_EXECUTE //3－PAGE_EXECUTE_READ //4－PAGE_EXECUTE_READWRITE op.protection=rand()%5; //指定操作的权限 if(oper==6)//当oper达到6,一个"保留－提交－加锁－解锁－回收－释放"的操作循环结束，进入下一次循环 oper = 0; } /////////////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////////// DWORD Mornitor(LPDWORD lpdwparm) {//监测线程，跟踪stimulator线程的内存分配行为，输出当前的系统和内存的信息 while(1) { WaitForSingleObject(mornitor,INFINITE); //等待内存分配线程Stimulator的内存分配活动结束 cout<<"-------------------------------------------------------------------"<<endl; cout<<"进入监测线程.........\n"<<endl; Sleep(2000); //以下程序显示系统信息 SYSTEM_INFO SysInfo; //系统信息 cout<<"\n通过GetSystemInfo()访问得到的系统信息:\n"<<endl; Sleep(2000); GetSystemInfo(&SysInfo); cout<<"ActiveProcessorMask: "<<SysInfo.dwActiveProcessorMask<<endl; cout<<"AllocationGranularity: "<<SysInfo.dwAllocationGranularity<<endl; cout<<"NumberOfProcessors: "<<SysInfo.dwNumberOfProcessors<<endl; cout<<"OemId: "<<SysInfo.dwOemId<<endl; cout<<"PageSize: "<<SysInfo.dwPageSize<<endl; cout<<"ProcessorType: "<<SysInfo.dwProcessorType<<endl; cout<<"MaximumApplicationAddress: "<<SysInfo.lpMaximumApplicationAddress<<endl; cout<<"MinimumApplicationAderess: "<<SysInfo.lpMinimumApplicationAddress<<endl; cout<<"ProcessorArchitecture: "<<SysInfo.wProcessorArchitecture<<endl; cout<<"ProcessorLevel: "<<SysInfo.wProcessorLevel<<endl; cout<<"ProcessorRevision: "<<SysInfo.wProcessorRevision<<endl; cout<<"Reserved: "<<SysInfo.wReserved<<endl; Sleep(2000); //以下程序显示内存状态 MEMORYSTATUS MemStat; //内存状态 cout<<"\n通过GlobalMemoryMemStat()访问得到内存状态:\n"<<endl; Sleep(2000); GlobalMemoryStatus(&MemStat); cout<<"AvailPageFile: "<<MemStat.dwAvailPageFile<<endl; cout<<"AvailPhys: "<<MemStat.dwAvailPhys<<endl; cout<<"AvailVirtural: "<<MemStat.dwAvailVirtual<<endl; cout<<"Length: "<<MemStat.dwLength<<endl; cout<<"MemoryLoad: "<<MemStat.dwMemoryLoad<<endl; cout<<"TotalPageFile: "<<MemStat.dwTotalPageFile<<endl; cout<<"TotalPhy: "<<MemStat.dwTotalPhys<<endl; cout<<"TotalVirtual: "<<MemStat.dwTotalVirtual<<endl; Sleep(2000); //以下程序显示内存基本信息 MEMORY_BASIC_INFORMATION MemInfo; //内存基本信息 cout<<"\n通过VirtualQuery()访问得到内存基本信息:\n"<<endl; Sleep(2000); VirtualQuery(SysInfo.lpMinimumApplicationAddress,&MemInfo,sizeof(MEMORY_BASIC_INFORMATION)); cout<<"AllocationBase: "<<MemInfo.AllocationBase<<endl; cout<<"AllocationProtect: "<<MemInfo.AllocationProtect<<endl; cout<<"BaseAddress: "<<MemInfo.BaseAddress<<endl; cout<<"Protect: "<<MemInfo.Protect<<endl; cout<<"RegionSize: "<<MemInfo.RegionSize<<endl; cout<<"State: "<<MemInfo.State<<endl; cout<<"Type: "<<MemInfo.Type<<endl; Sleep(2000); cout<<"\n退出监测线程........\n"<<endl; Sleep(2000); cout<<"-------------------------------------------------------------------"<<endl; //释放stimulator信号量，告诉Stimulator可以执行下一次模拟的内存分配活动 ReleaseSemaphore(stimulator,1,NULL); } return 0; } ////////////////////////////////////////////////////////////////////////////////////////////// void Stimulator() {//模拟内存分配活动的线程，通过GenerateOperation()生成当次要执行的模拟操作 Operation op; SYSTEM_INFO SysInfo; DWORD privillage; //操作权限 LPVOID start; //模拟分配操作的内存起始地址 long size; //模拟分配操作所分配的内存块大小 //GetSystemInfo(&SysInfo); //获得系统信息 while(1) { WaitForSingleObject(stimulator,INFINITE); //等待Mornitor的监测操作结束 cout<<"进入模拟分配内存线程........\n"<<endl; Sleep(1000); GenerateOperation(op); //生成当次要执行的模拟操作,通过引用反悔给op Sleep(op.lastTime); //内存分配操作的执行时间 GetSystemInfo(&SysInfo); //获得系统信息 switch(op.protection) //根据文件内容确定权限 { case 0: privillage=PAGE_READONLY; break; case 1: privillage=PAGE_READWRITE; break; case 2: privillage=PAGE_EXECUTE; break; case 3: privillage=PAGE_EXECUTE_READ; break; case 4: privillage=PAGE_EXECUTE_READWRITE; break; default: privillage=PAGE_READONLY; } switch(op.operation) //根据所要求的操作类型执行相应操作 { case 0: { cout<<"现在作保留一个内存区域的操作........"<<endl; Sleep(1000); start=VirtualAlloc(NULL,op.blockSize*SysInfo.dwPageSize,MEM_RESERVE,PAGE_NOACCESS); size=op.blockSize*SysInfo.dwPageSize; cout<<"起始地址: "<<start<<"\t被保留的内存块的大小: "<<size<<endl; Sleep(1000); cout<<"保留内存区域的操作完毕!"<<endl; Sleep(1000); break; } case 1: { cout<<"现在作提交一个内存区域的操作........"<<endl; Sleep(1000); start=VirtualAlloc(start,size,MEM_COMMIT,privillage); cout<<"起始地址: "<<start<<"\t被提交的内存块的大小: "<<size<<endl; Sleep(1000); cout<<"提交内存区域的操作完毕!"<<endl; Sleep(1000); break; } case 2: { cout<<"现在作对一个内存区域加锁的操作........"<<endl; Sleep(1000); cout<<"起始地址: "<<start<<"\t被加锁的内存块的大小:"<<size<<endl; if(!VirtualLock(start,size)) cout<<"系统发生一个错误，该错误的信息码为: "<<GetLastError()<<endl; Sleep(1000); cout<<"加锁内存区域的操作完毕!"<<endl; Sleep(1000); break; } case 3: { cout<<"现在作对一个内存区域解锁的操作........"<<endl; Sleep(1000); cout<<"起始地址: "<<start<<"\t被解锁内存块的大小: "<<size<<endl; if(!VirtualUnlock(start,size)) cout<<"系统发生一个错误，该错误的信息码为: "<<GetLastError()<<endl; Sleep(1000); cout<<"解锁内存区域的操作完毕!"<<endl; Sleep(1000); break; } case 4: { cout<<"现在作回收一个内存区域的操作........"<<endl; Sleep(1000); cout<<"起始地址: "<<start<<"\t被回收内存块的大小: "<<size<<endl; if(!VirtualFree(start,size,MEM_DECOMMIT)) cout<<"系统发生一个错误，该错误的信息码为: "<<GetLastError()<<endl; Sleep(1000); cout<<"回收内存区域的操