clock_gettime(CLOCK_MONOTONIC, &before_draw); fillDFBSurface(primary, imgSfc[i], 0,0); clock_gettime(CLOCK_MONOTONIC, &after_draw); /* * 获取画图前后两次的时间差elapsed_msec * 如果elapsed_msec>interval,则不再休眠 * 否则休眠interval-elapsed_msec */ elapsed_msec = deltaMsecs(&after_draw...
从标准定义看,可以存在 clock drift (允许时钟漂移) 这里大致说一下 clock drift 的概念,它是源于 时钟同步 概念。时钟同步(Clock synchronization)是计算机科学与工程学中的一个概念,旨在协调多个独立的时钟。现实中的多个时钟,即使时间已调至一致,但在一段时间后依然会因为时钟漂移(即clock drift)而显示不同的时间...
clock_gettime(CLOCK_REALTIME, &ts); id = (ts.tv_nsec + ts.tv_nsec/65536UL) & 0xffff; q[0] = id/256; q[1] = id; memcpy(buf, q, n); return n; } static int is_valid_hostname(const char *host) { const unsigned char *s; ...
clearTimeout(ID); } function begin() { var startTime=getTime(); var ret=document.getElementById("clock"); ret.value=startTime; } var ID; function begin_click() { // end(); if (ID==undefined){ begin(); ID=setInterval(begin,1000); ...
If the replaced icon is animatable, return the animation start time based on system clock. IconView Get the view containing the Splash Screen icon and its background. Id Returns this view's identifier. -or- Sets the identifier for this view. (Inherited from View) ImportantForAccessibility ...
yes checking whether clock_gettime(CLOCK_MONOTONIC, ...) is compilable... yes checking whether mach_absolute_time() is compilable... no checking whether compiler supports -Werror... yes checking whether syscall(2) is compilable... yes checking for secure_getenv... yes checking for sched_...
> "dialog.html?"+ (new Date()).getTime (), > "Dialog", > ...[/color] In the presence of clock-correcting software, time can repeat. It might be safer to define globally var Rabbit = 0 ; and to use "dialog.htm l?" + Rabbit++ ; ...
clock_gettime_test clock_resolution .gitignore HighAccuracyCollection.zip License.txt README.md SECURITY.md Repository files navigation README Code of conduct License Security Windows-Time-Calibration-Tools Window Tools for Calibrating Windows Time Service ...
patch_clock_gettime.h Only inject a custom clock_gettime if we need to. Aug 3, 2016 pc.sh generate and install a pkgconfig file on make install (#229) Feb 13, 2021 platform.sh patch build system for compilation on CYGWIN (CYGWIN_NT-10.0-19042) -… ...
这样,tscns基本上可以代替标准系统时钟(clock_gettime/gettimeofday/std::chrono::XXX_clock)来使用。 这个功能需要用户周期性的在后台调用tscns.calibrate()函数,使tscns能够动态调整内部参数,与系统时间紧密同步。同时,tscns可以确保在校准过程中前台线程获取的时间戳是连续的,不会跳变也不会回退。下图展示了tscns...