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Spinlock versus Semaphore
...ck (or, the other way around, a lock is a special case of a semaphore). Usually, but not necessarily, spinlocks are only valid within one process whereas semaphores can be used to synchronize between different processes, too.
A lock works for mutual exclusion, that is one thread at a time can acqui...
Intro to GPU programming [closed]
Everyone has this huge massively parallelized supercomputer on their desktop in the form of a graphics card GPU.
9 Answers
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How do I fix the Visual Studio compile error, “mismatch between processor architecture”?
...T 4.5, although I suppose it might have been possible before.
First, it really is just a warning. It should not hurt anything if you are just dealing with x86 dependencies. Microsoft is just trying to warn you when you state that your project is compatible with "Any CPU" but you have a dependency o...
How to scale threads according to CPU cores?
...e it just like you would create any other object. So, let's say that you call the above method and find that it returns 2 processors. Awesome. Now, you can create a loop that generates a new Thread, and splits the work off for that thread, and fires off the thread. Here's some psuedocode to demo...
Why would you use an ivar?
I usually see this question asked the other way, such as Must every ivar be a property? (and I like bbum's answer to this Q).
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How to throw an exception in C?
...and caught in the program, but the C code portions will remain ignorant of all of this going on except that exception throwing and catching often rely on functions written in C which reside in the C++ libraries. C is used because you can't risk the function called to do throw needing to throw an exc...
基于PECL OAuth打造微博应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...rOAuth改的，一旦多平台集成，很容易出现命名冲突之类的问题。
既然官方SDK不给力，那我们只能发扬自力更生的革命精神了！好消息是PHP本身已经有了一个标准的OAuth实现：PECL OAuth！下面以此为例来讲解一下：
说明：首先需...
Retrieve CPU usage and memory usage of a single process on Linux?
I want to get the CPU and memory usage of a single process on Linux - I know the PID. Hopefully, I can get it every second and write it to a CSV using the 'watch' command. What command can I use to get this info from the Linux command-line?
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Which is faster : if (bool) or if(int)?
...s a bool as an 8-bit value, and your system ABI requires it to "promote" small (< 32-bit) integer arguments to 32-bit when pushing them onto the call stack. So to compare a bool, the compiler generates code to isolate the least significant byte of the 32-bit argument that g receives, and compares...
warning C4996 - c++1y / stl - 清泛IT社区，为创新赋能！
...可能会产生诸如内存泄露、缓冲区溢出、非法访问等安全问题。这些函数如：strcpy、strcat等。对于这些问题，VC2005建议使用这些函数的更高级的安全版本，即在这些函数名后面加了一个_s的函数。这些安全版本函数使用起来更有...