XFree86 XServer的入口函数的具体注释

XFree86 XServer的入口函数的具体注释

// dix/Main.c

intmain(argc, argv)int argc;char *argv[];{ int i, j, k; HWEventQueueType alwaysCheckForInput[2]; /* Notice if we're restart. Probably this is because we jumped through * uninitialized pointer */ if (restart) FatalError("server restarted. Jumped through uninitialized pointer?\n"); else restart = 1; #if 0 ExpandCommandLine(&argc, &argv); #endif /* These are needed by some routines which are called from interrupt * handlers, thus have no direct calling path back to main and thus * can't be passed argc, argv as parameters */ argcGlobal = argc; argvGlobal = argv; display = "0"; /* 分析命令行参数。

ProcessCommandLine(...)是在os层实现的，在其外部它 * 会调用ddx层的ddxProcessArgument(argc, argv, i)，所以在Port时，可以 * 在此函数中扩充自己的命令行参数 */ ProcessCommandLine(argc, argv); // 初始化alwaysCheckForInput的值 alwaysCheckForInput[0] = 0; alwaysCheckForInput[1] = 1;while(1) { // 服务器重新生成的记数 serverGeneration++;// 屏保的缺省参数 ScreenSaverTime = defaultScreenSaverTime; ScreenSaverInterval = defaultScreenSaverInterval; ScreenSaverBlanking = defaultScreenSaverBlanking; ScreenSaverAllowExposures = defaultScreenSaverAllowExposures;#ifdef DPMSExtension DPMSStandbyTime = defaultDPMSStandbyTime; DPMSSuspendTime = defaultDPMSSuspendTime; DPMSOffTime = defaultDPMSOffTime; DPMSEnabled = defaultDPMSEnabled; DPMSPowerLevel = 0; #endif// 把BlockHandler和WakeupHandler置空 InitBlockAndWakeupHandlers();/* os层的初始化接口读取 * 主要操作是close(stdin) and close(stdout)vc60 注释 快捷键，redirect stderr */ /* Perform any operating system dependent initializations you'd like */ OsInit();if(serverGeneration == 1) { // XServer第一次创建，所以应该create listen's socketvc60 注释 快捷键，一般为6000 CreateWellKnownSockets();// 初始化一些处理X请求示例的向量表。

全局变量ProcVector，一个指向变量的指针赋值 InitProcVectors();// 分配MAXCLIENTS个ClientPtr指针变量。给clients赋值 clients = (ClientPtr *)xalloc(MAXCLIENTS * sizeof(ClientPtr)); if (!clients)FatalError("couldn't create client array");// 初始化，每一个clients[i]置NULLfor (i=1; i

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