大概的思路: 生成timer_list结构体并初始化,然后用add_timer注册刚才初始化的timer,等expire时间到后就调用callback回调函数!思路很简单,从这里能看到核心的函数时add_timer和mod_timer函数,而这两个函数最终都调用了__mod_timer函数;从函数的源码看,用的都是队列来组织timer的,传说中的红黑树了? 上面的这些定时...
atomic_t count; bool use_callback; union { void (*func)(unsigned long data); void (*callback)(struct tasklet_struct *t); }; unsigned long data; }; Tasklet的使用: (1)、声明一个新的tasklet struct tasklet_struct my_tasklet = { NULL, 0, ATOMIC_INIT(0), my_tasklet_handler, dev };...
atomic_t count; bool use_callback; union { void (*func)(unsigned long data); void (*callback)(struct tasklet_struct *t); }; unsigned long data; }; Tasklet的使用: (1)、声明一个新的tasklet struct tasklet_struct my_tasklet = { NULL, 0, ATOMIC_INIT(0), my_tasklet_handler, dev };...
drivers/rtc/rtc-dev.c 以及其调用的drivers/rtc/interface.c 等 RTC 核心层相当于把 file_operations 中的 open()、release()、读取和设置时间等,都间接 “转发” 给了底层的实例。如下摘取部分 RTC 核心层调用具体底层驱动 callback 的过程: 1)open: /* 文件 drivers/rtc/rtc-dev.c 中: */ static int...
Linux 消息队列 C封装 linux消息机制 1. 信号概述 Linux中的信号是一种消息处理机制, 它本质上是一个整数,不同的信号对应不同的值,由于信号的结构简单所以天生不能携带很大的信息量,但是信号在系统中的优先级是非常高的。 在Linux中的很多常规操作中都会有相关的信号产生,先从我们最熟悉的场景说起:...
rdma_resolve_addr -> RDMA_CM_EVENT_ADDRESS_RESOLVED -> rxm_open_conn -> fi_endpoint (vrb_open_ep) -> rdma_resolve_addr HG -> HG_Trigger -> hg_op_id->callback(&hg_cb_info) 查询地址设置的回调 lookup_callback -> HG_Forward -> NA_Msg_send_unexpected -> fi_senddata -> rxm_get...
/* Alert callback, for example for the SMBus alert protocol. * The format and meaning of the data value depends on the * protocol.For the SMBus alert protocol, there is a single bit * of data passed as the alert response's low bit ("event ...
rtc-asm9260.c rtc-aspeed.c rtc-at91rm9200.c rtc-at91sam9.c rtc-au1xxx.c rtc-bd70528.c rtc-bq32k.c rtc-bq4802.c rtc-brcmstb-waketimer.c rtc-cadence.c rtc-cmos.c rtc-core.h rtc-cpcap.c rtc-cros-ec.c rtc-da9052.c rtc-da9055.c rtc-da9063.c rtc-digicolor.c rtc-ds...
Back up the configurations off the switch. Download the Cumulus Linux image. Install the Cumulus Linux image with the onie-install -a -i <image-location> command, which boots the switch into ONIE. The following example command installs the image from a web server, then reboots the switch....
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