通过DECLARE_WAITQUEUE宏将等待队列项初始化成对应的任务结构,并且用于连接的相关指针均设置为空。其中加入了调试相关代码。 进程通过执行下面步骤将自己加入到一个等待队列中: 1) 调用DECLARE_WAITQUEUE()创建一个等待队列的项; 2)调用add_wait_queue()把自己加入到等待队列中。该队列会在进程等待的条件满足时唤醒...
1. 功能:创建以个等待队列头 2. 函数原型 #define DECLARE_WAIT_QUEUE_HEAD (name) / wait_queue_head_t name = __WAIT_QUEUE_HEAD_INITIALIZER(name) #define __WAIT_QUEUE_HEAD_INITIALIZER (name) { / .lock = __SPIN_LOCK_UNLOCKED(name.lock), / .task_list = { &(name).task_list, &(nam...
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*/staticssize_tn_hdlc_tty_write(struct tty_struct *tty, struct file *file,constunsignedchar*data,size_tcount){structn_hdlc*n_hdlc=tty2n_hdlc(tty);interror =0;DECLARE_WAITQUEUE(wait, current);structn_hdlc_buf*tbuf;if(debuglevel >= DEBUG_LEVEL_INFO) printk("%s(%d)n_hdlc_tty_write()...
010_Linux驱动之_DECLARE_WAIT_QUEUE_HEAD函数 010_Linux驱动之_DECLARE_WAIT_QUEUE_HEAD函数1. 功能:创建以个等待队列头 2. 函数原型 #define DECLARE_WAIT_QUEUE_HEAD (name) / wait_queue_head_t name = __WAIT_QUEUE_HEAD_INITIALIZER(name) #define __WAIT_QUEUE_HEAD_INITIALIZER (name) { / .lock...
Subject: Re: DECLARE_WAIT_QUEUE_HEAD; structure badly initialized... I have had similar problems with static/global initialization in USB module code. A wait_queue_head was not properly initialized and we had to re-initialize it in module_init(). ...