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A fast method to round a double to a 32-bit int explained

... this: and it can be seen as two 32-bit integers; now, the int taken in all the versions of your code (supposing it's a 32-bit int) is the one on the right in the figure, so what you are doing in the end is just taking the lowest 32 bits of mantissa. Now, to the magic number; as you correctly ...
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“register” keyword in C?

... a processor register if possible. Most modern compilers do that automatically, and are better at picking them than us humans. share | improve this answer | follow ...
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c++ volatile关键字简析 - C/C++ - 清泛网 - 专注C/C++及内核技术

c++ volatile关键字简析volatile防范冲突,提高效率。降低CPU Cache Line锁冲突的几率。不同于普通变量在于:CPU缓存中有值的话,也得从内存中重新加载到缓存(普通变量不会);即认为寄存器值不可靠, volatile 防范冲突,提高效...
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尝试加载 Oracle 客户端库时引发 BadImageFormatException。如果在安装 32 ...

...位 Oracle 客户端组件的情况下以 64 位模式运行,将出现此问题。尝试加载 Oracle 客户端库时引发 BadImageFormatException。如果在安装 32 位 Oracle 客户端组件的情况下以 64 位模式运行,将出...“尝试加载 Oracle 客户端库时引发 BadImageForm...
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IE无法设置短域名下Cookie - 更多技术 - 清泛网 - 专注C/C++及内核技术

...e最近客户在使用我们的流量监测系统以及GA时发现了一个问题,我们统计到的数据比GA的要多很多倍,而且我们统计到的数据中,跳出率非常高,高...最近客户在使用我们的流量监测系统以及GA时发现了一个问题,我们统计到的...
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移动端弱网络测试问题总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术

移动端弱网络测试问题总结 因项目需要,在这两个版本开始引入弱网络测试。本文对测试过程中真实遇到的一些有代表性的问题做一下记录和总结。 先介绍一下使用的弱...因项目需要,在这两个版本开始引入弱网络测试。本...
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Facebook代码审核工具Phabricator使用指南——Audit用户指南 - 更多技术 - ...

...一次提交。当你认可这次提交时,审核请求会被关闭。 问题提交(Problem Commits)。是指有人在审核过程中对你提交的代码表示担忧。当你消除了他们的疑虑并且所有审核人均对代码表示认可时,问题提交将会消失。 举例 ...
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廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...同时读写可能会有IO异常,导致drbd设备失效 为了解决这个问题则使用 gfs + cman 实现分布式文件锁方案 3.3安装cman yum –y cman 3.4 gfs集群文件系统 在 /usr/local/drbd-utils-8.9.4/etc/drbd.conf 在配置文件的 net 选项中 all...
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Spark java.lang.OutOfMemoryError: Java heap space

... longer need to play with these values, spark will determine them automatically. Similar to above but shuffle memory fraction. If your job doesn't need much shuffle memory then set it to a lower value (this might cause your shuffles to spill to disk which can have catastrophic impact on speed). So...
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Run an untrusted C program in a sandbox in Linux that prevents it from opening files, forking, etc.?

...interactively and in automatic mode. It has a ptrace()-based backend which allows its use on a Linux system without special privileges, as well as a far faster and more poweful backend which requires patching the kernel. It is also possible to create a sandbox on Unix-like systems using chroot(1), ...