signal()函数理解
在<signal.h> 这个头文件中。
signal(参数1,参数2);
参数1:我们要进行处理的信号。系统的信号我们可以再终端键入 kill -l查看(共64个)。其实这些信号时系统定义的宏。
参数2:我们处理的方式(是系统默认还是忽略还是捕获)。
yanhaiqun@ubuntu-server:~/001-GL40A63$ kill -l 1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL 5) SIGTRAP 6) SIGABRT 7) SIGBUS 8) SIGFPE 9) SIGKILL 10) SIGUSR1 11) SIGSEGV 12) SIGUSR2 13) SIGPIPE 14) SIGALRM 15) SIGTERM 16) SIGSTKFLT 17) SIGCHLD 18) SIGCONT 19) SIGSTOP 20) SIGTSTP 21) SIGTTIN 22) SIGTTOU 23) SIGURG 24) SIGXCPU 25) SIGXFSZ 26) SIGVTALRM 27) SIGPROF 28) SIGWINCH 29) SIGIO 30) SIGPWR 31) SIGSYS 34) SIGRTMIN 35) SIGRTMIN+1 36) SIGRTMIN+2 37) SIGRTMIN+3 38) SIGRTMIN+4 39) SIGRTMIN+5 40) SIGRTMIN+6 41) SIGRTMIN+7 42) SIGRTMIN+8 43) SIGRTMIN+9 44) SIGRTMIN+10 45) SIGRTMIN+11 46) SIGRTMIN+12 47) SIGRTMIN+13 48) SIGRTMIN+14 49) SIGRTMIN+15 50) SIGRTMAX-14 51) SIGRTMAX-13 52) SIGRTMAX-12 53) SIGRTMAX-11 54) SIGRTMAX-10 55) SIGRTMAX-9 56) SIGRTMAX-8 57) SIGRTMAX-7 58) SIGRTMAX-6 59) SIGRTMAX-5 60) SIGRTMAX-4 61) SIGRTMAX-3 62) SIGRTMAX-2 63) SIGRTMAX-1 64) SIGRTMAX
一些常用的Signal 如下:
注:下面是从百度文库中找的(*^__^*) 嘻嘻……
SignalDescriptionSIGABRT由调用abort函数产生,进程非正常退出SIGALRM用alarm函数设置的timer超时或setitimer函数设置的interval timer超时SIGBUS某种特定的硬件异常,通常由内存访问引起SIGCANCEL由Solaris Thread Library内部使用,通常不会使用SIGCHLD进程Terminate或Stop的时候,SIGCHLD会发送给它的父进程。缺省情况下该Signal会被忽略SIGCONT当被stop的进程恢复运行的时候,自动发送SIGEMT和实现相关的硬件异常SIGFPE数学相关的异常,如被0除,浮点溢出,等等SIGFREEZESolaris专用,Hiberate或者Suspended时候发送SIGHUP发送给具有Terminal的Controlling Process,当terminal被disconnect时候发送SIGILL非法指令异常SIGINFOBSD signal。由Status Key产生,通常是CTRL+T。发送给所有Foreground Group的进程SIGINT由Interrupt Key产生,通常是CTRL+C或者DELETE。发送给所有ForeGround Group的进程SIGIO异步IO事件SIGIOT实现相关的硬件异常,一般对应SIGABRTSIGKILL无法处理和忽略。中止某个进程SIGLWP由Solaris Thread Libray内部使用SIGPIPE在reader中止之后写Pipe的时候发送SIGPOLL当某个事件发送给Pollable Device的时候发送SIGPROFSetitimer指定的Profiling Interval Timer所产生SIGPWR和系统相关。和UPS相关。SIGQUIT输入Quit Key的时候(CTRL+\)发送给所有Foreground Group的进程SIGSEGV非法内存访问SIGSTKFLTLinux专用,数学协处理器的栈异常SIGSTOP中止进程。无法处理和忽略。SIGSYS非法系统调用SIGTERM请求中止进程,kill命令缺省发送SIGTHAWSolaris专用,从Suspend恢复时候发送SIGTRAP实现相关的硬件异常。一般是调试异常SIGTSTPSuspend Key,一般是Ctrl+Z。发送给所有Foreground Group的进程SIGTTIN当Background Group的进程尝试读取Terminal的时候发送SIGTTOU当Background Group的进程尝试写Terminal的时候发送SIGURG当out-of-band data接收的时候可能发送SIGUSR1用户自定义signal 1SIGUSR2用户自定义signal 2SIGVTALRMsetitimer函数设置的Virtual Interval Timer超时的时候SIGWAITINGSolaris Thread Library内部实现专用SIGWINCH当Terminal的窗口大小改变的时候,发送给Foreground Group的所有进程SIGXCPU当CPU时间限制超时的时候SIGXFSZ进程超过文件大小限制SIGXRESSolaris专用,进程超过资源限制的时候发送
static全局变量与普通的全局变量有什么区别:static全局变量只初使化一次,防止在其他文件单元中被引用; static局部变量和普通局部变量有什么区别:static局部变量只被初始化一次,下一次依据上一次结果值; static函数与普通函数有什么区别:static函数在内存中只有一份,普通函数在每个被调用中维持一份拷贝。
mmi.xml
<module name="MSENSOR" lib_name="mmi_sensor.so" enable="0" automation="1" display_name="msensor" layout="layout_msensor.xml" parameter="type:magnetic;delay:20;" limit="x_min_limit:-1000;x_max_limit:1000;y_min_limit:-1000;y_max_limit:1000;z_min_limit:-1000;z_max_limit:1000;"/>
mmi.cpp
main(){
pre_config;//path_config_android.xml-->strings_map ;func_list---> func_map
init_config;
build_main_ui;
}
Layout_audio.xml (res\layout): <include layout="footer.xml"/> Layout_camera_back.xml (res\layout): <include layout="footer.xml"/> Layout_camera_front.xml (res\layout): <include layout="footer.xml"/> Layout_cb.xml (res\layout): <include layout="footer.xml"/> Layout_common.xml (res\layout): <include layout="footer.xml"/> Layout_feedback.xml (res\layout): <include layout="footer.xml"/> Layout_gsensor.xml (res\layout): <include layout="footer.xml"/> Layout_gyroscope.xml (res\layout): <include layout="footer.xml"/> Layout_handset.xml (res\layout): <include layout="footer.xml"/> Layout_headset.xml (res\layout): <include layout="footer.xml"/> Layout_headset_key.xml (res\layout): <include layout="footer.xml"/> Layout_key.xml (res\layout): <include layout="footer.xml"/> Layout_lcd.xml (res\layout): <include layout="footer.xml"/> Layout_loudearpiece.xml (res\layout): <include layout="footer.xml"/> Layout_loudspeaker.xml (res\layout): <include layout="footer.xml"/> Layout_lsensor.xml (res\layout): <include layout="footer.xml"/> Layout_msensor.xml (res\layout): <include layout="footer.xml"/> Layout_primary_mic.xml (res\layout): <include layout="footer.xml"/> Layout_psensor.xml (res\layout): <include layout="footer.xml"/> Layout_secondary_mic.xml (res\layout): <include layout="footer.xml"/>
Draw.cpp
init_draw;
listview.cpp
set_items()
fastmmi/res/values/Android.mk
patch_config_android.xml --> /etc/mmi/patch_config.xml (资源配置文件)
fastmmi/res/config/Android.mk
mmi.xml --> /etc/mmi/mmi.xml
Log : /cache/FTM_AP/mmi.log
switch_module : (切换子界面)switch_cur_layout_locked module_exec_ui launch_module launch_module_sensor
build_main_ui : 显示主界面 main.xml
draw_thread: sem_wait(&g_draw.sem); //绘制界面
update_main_status : 更新主界面的测试结果
start_threads: input_waiting_thread input_handle_thread
draw_thread server_accepting_thread
msg_waiting_thread msg_handle_thread
key 测试:
key.cpp
run_test( if(!ev_wait(-1)) ev_dispatch();)
events.cpp
ev_init(){opendir("/dev/input"); "/dev/input/event"} ev_fdinfo[ev_count].cb = input_cb; epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev)
ev_wait(epoll_wait(epollfd, polledevents, ev_count, timeout);)
ev_dispatch(){ev_callback(fdi->fd, polledevents[n].events, fdi->data); }
input.cpp
input_callback()-->adjust_ev()--->invoke_listener(g_input_listener->dispatch_event)-->key_callback
input_listener_key.cpp
dispatch_event() --->set_color()
key_down_cb
key_callback
01-01 15:20:27.714 392 1461 I mmi : mmi, hook_vkey(): Got virtual keycode:158 01-01 15:20:27.714 392 1461 E mmi : ==============---btn_name = back 01-01 15:20:27.714 392 1461 E mmi : ==============---mod= KEY 01-01 15:20:27.714 392 1461 I mmi : mmi, dispatch_event(): button(back) press down, code=158 01-01 15:20:27.714 392 1461 I mmi : mmi, key_down_cb(): input key code=158 01-01 15:20:27.714 392 1461 I mmi : mmi, key_down_cb(): key(key_name=back) test pass
01-01 15:20:25.891 392 1461 I mmi : mmi, dispatch_event(): button(power) press down, code=116 01-01 15:20:25.891 392 1461 I mmi : mmi, key_down_cb(): input key code=116 01-01 15:20:25.891 392 1461 I mmi : mmi, key_down_cb(): key(key_name=power) test pass 01-01 15:20:25.891 392 1461 I mmi : mmi, key_callback(): key:116 press down
01-01 15:20:26.061 392 1461 E mmi : ==============---btn_name = power 01-01 15:20:26.061 392 1461 E mmi : ==============---mod= KEY 01-01 15:20:26.061 392 1461 I mmi : [dispatch_event]key:116 release 01-01 15:20:26.061 392 1461 I mmi : mmi, key_callback(): key:116 release
parse_vkey_map()
/sys/board_properties/virtualkeys.**
/sys/board_properties/virtualkeys.ft5x06_ts
cat virtualkeys.ft5x06_ts 0x01:139:120:1315:240:56 0x01:172:360:1315:240:56 0x01:158:600:1315:240:56
kernel/include/uapi/linux/input.h
#define KEY_HOME 102
#define KEY_HOMEPAGE 172 /* AC Home */
55/kernel/arch/arm/boot/dts/qcom/msm8909-qrd-skua.dtsi
&soc { i2c@78b9000 { /* BLSP1 QUP5 */ focaltech@38 { compatible = "focaltech,fts"; reg = <0x38>; interrupt-parent = <&msm_gpio>; interrupts = <13 0x08>; vdd-supply = <&pm8909_l17>; vcc_i2c-supply = <&pm8909_l6>; focaltech,name = "fts"; focaltech,family-id = <0x54>; focaltech,reset-gpio = <&msm_gpio 12 0x00>; focaltech,irq-gpio = <&msm_gpio 13 0x08>; focaltech,display-coords = <0 0 720 1280>; focaltech,panel-coords = <0 0 720 1400>; focaltech,button-map= <158 172 139>; focaltech,no-force-update; focaltech,i2c-pull-up; focaltech,group-id = <1>;
50/kernel/arch/arm/boot/dts/qcom/msm8909-qrd-skua.dtsi
&soc { i2c@78b9000 { /* BLSP1 QUP5 */ focaltech@38{ compatible = "focaltech,fts"; reg = <0x38>; interrupt-parent = <&msm_gpio>; interrupts = <13 0x2008>; vdd-supply = <&pm8909_l17>; vcc_i2c-supply = <&pm8909_l6>; focaltech,name = "ft6x06"; focaltech,family-id = <0x54>; focaltech,reset-gpio = <&msm_gpio 12 0x00>; focaltech,irq-gpio = <&msm_gpio 13 0x00>; focaltech,display-coords = <0 0 720 1280>; focaltech,panel-coords = <0 0 720 1280>; focaltech,button-map= <139 102 158>; focaltech,no-force-update; focaltech,i2c-pull-up; focaltech,group-id = <1>;
