📄 csdn技术中心 windows2000 进程-线程分析（一）.htm
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style="COLOR: blue; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">），实际上应该就是保存在磁盘或其他介质中的可执行文件。</SPAN><SPAN
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN
lang=EN-US>Windows</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">提供以下方法用于在不同进程之间共享数据：</SPAN></FONT></P>
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</SPAN></SPAN></SPAN><FONT size=3><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">动态数据交换（</SPAN><SPAN
lang=EN-US>DDE</SPAN><SPAN
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</SPAN></SPAN></SPAN><FONT size=3><SPAN lang=EN-US>OLE</SPAN><SPAN
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lang=EN-US>COM</SPAN></FONT></P>
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</SPAN></SPAN></SPAN><SPAN
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size=3>管道和邮箱</FONT></SPAN></P>
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</SPAN></SPAN></SPAN><SPAN
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size=3>内存映射文件</FONT></SPAN></P>
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style="mso-list: Ignore">二、<SPAN
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</SPAN></SPAN></SPAN></B><B><SPAN
style="FONT-SIZE: 14pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">进程</SPAN></B><B><SPAN
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B><SPAN lang=EN-US
style="FONT-SIZE: 12pt">2</SPAN></B><B><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">．</SPAN></B><B><SPAN
lang=EN-US style="FONT-SIZE: 12pt">1 </SPAN></B><B><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">概述</SPAN></B><SPAN
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size=3>进程通常被定义为一个正在运行的程序的对象的实例，它有两个部分组成：</FONT></SPAN></P>
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size=3>一个是操作系统用来管理进程的内核对象。内核对象也是系统用来存放关于进程的统计信息的地方。</FONT></SPAN></P>
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</SPAN></SPAN></SPAN><FONT size=3><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">另一个是地址空间，它包含所有可执行模块或</SPAN><SPAN
lang=EN-US>DLL</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的代码和数据。它还包含动态内存分配的空间。如线程堆栈和堆（</SPAN><SPAN
lang=EN-US>Heaps</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）分配空间。</SPAN></FONT></P>
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style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">进程是不活泼的。要是进程完成某项操作，它必须拥有一个在它的环境中运行的线程，该线程负责执行包含在进程的地址空间中的代码。实际上，单个进程可能包含若干个线程，所有这些线程都“同时”执行进程地址空间中的代码。为此，每个线程都有他自己的一组</SPAN><SPAN
lang=EN-US>CPU</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">寄存器（即，线程的上下文，定义在：</SPAN><SPAN
lang=EN-US>WinNT.h</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">头文件中）和它自己的堆栈。但是，由于</SPAN><SPAN
lang=EN-US>Windows</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中，是针对进程来分配系统资源的。所以，线程的堆栈实际上位于其所属进程的虚拟地址空间中。每个进程至少拥有一个线程，来执行进程地址空间中的代码。如果没有线程来执行进程的地址空间中的代码，那么进程就没有存在的理由了，系统将自动撤销该进程和它的地址空间。</SPAN></FONT></P>
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style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">若要使所有线程都能运行，操作系统就要为每个线程安排一定的</SPAN><SPAN
lang=EN-US>CPU</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时间片。它通过一种循环方式为线程提供时间片（称为：量程），造成一种假象，仿佛所有线程都是同时运行的一样。</SPAN></FONT></P>
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size=3>当创建一个进程时，系统会自动创建它的第一个线程，成为主线程。然后，该线程可以创建其他的线程或者进程。</FONT></SPAN></P>
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B><SPAN lang=EN-US
style="FONT-SIZE: 12pt">2</SPAN></B><B><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">．</SPAN></B><B><SPAN
lang=EN-US style="FONT-SIZE: 12pt">2 Windows</SPAN></B><B><SPAN
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">应用程序概述</SPAN></B></P>
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size=3><SPAN lang=EN-US>Windows</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">支持两类应用程序：</SPAN></FONT></P>
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</SPAN></SPAN></SPAN><FONT size=3><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">基于图形用户界面（</SPAN><SPAN
lang=EN-US>GUI</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）的应用程序</SPAN></FONT></P>
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</SPAN></SPAN></SPAN><FONT size=3><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">基于控制台用户界面（</SPAN><SPAN
lang=EN-US>CUI</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）的应用程序</SPAN></FONT></P>
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size=3><SPAN lang=EN-US>Windows</SPAN><SPAN
style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">应用程序必须有一个在程序启动时调用的<SPAN
style="BACKGROUND: #d9d9d9; mso-shading: white; mso-pattern: gray-15 auto">进入点函数</SPAN>。可使用的进入点如下图所示：</SPAN></FONT></P>
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src="CSDN技术中心 Windows2000 进程-线程分析（一）.files/CSDN_Dev_Image_2003-10-231455152.jpg"
o:title="application entry point"><FONT
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