大约有 37,000 项符合查询结果（耗时：0.0515秒） [XML]
When should one use a spinlock instead of mutex?
...e lock won't be unlocked either. IOW, a spinlock wastes only CPU time on those systems for no real benefit. If the thread was put to sleep instead, another thread could have ran at once, possibly unlocking the lock and then allowing the first thread to continue processing, once it woke up again.
On...
Does PHP have threading?
...
That's what I thought. I saw a bunch of older postings saying no, and nothing on php.net, so this was my thought. Thanks for confirming it.
– Thomas Owens
Oct 16 '08 at 19:00
...
PHP parse/syntax errors; and how to solve them
Everyone runs into syntax errors. Even experienced programmers make typos. For newcomers, it's just part of the learning process. However, it's often easy to interpret error messages such as:
...
How does the compilation/linking process work?
...r handles the preprocessor directives, like #include and #define. It is agnostic of the syntax of C++, which is why it must be used with care.
It works on one C++ source file at a time by replacing #include directives with the content of the respective files (which is usually just declarations), do...
How does a hash table work?
...et another spot in the table (double hashing), or simply to find a space close to the one you were given (i.e. right next to the previous book assuming the slot was available also known as linear probing). This would mean that you have some digging to do when you try to find the book later, but it's...
Should CSS always preceed Javascript?
... that you have scripts located in the <head> of your document (as opposed to the end of the <body>). There are various arguments regarding why you might link to your scripts in the <head> versus the end of the document, but that's outside the scope of this answer. This is strictl...
How does SSL really work?
...t and made it more precise.
TLS Capabilities
"SSL" is the name that is most often used to refer to this protocol, but SSL specifically refers to the proprietary protocol designed by Netscape in the mid 90's. "TLS" is an IETF standard that is based on SSL, so I will use TLS in my answer. These day...
内存管理内幕：动态分配的选择、折衷和实现 - C/C++ - 清泛网 - 专注C/C++及内核技术
...unistd.h>
void malloc_init()
{
/* grab the last valid address from the OS */
last_valid_address = sbrk(0);
/* we don't have any memory to manage yet, so
*just set the beginning to be last_valid_address
*/
managed_memory_start = last_valid_address;
/* Okay, we're initialized and rea...
WebView and HTML5
...topic just in case someone read it and is interested on the result.
It is possible to view a video element (video html5 tag) within a WebView, but I must say I had to deal with it for few days. These are the steps I had to follow so far:
-Find a properly encoded video
-When initializing the WebVie...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...easy_list_for_each_entry_safe：
#define easy_list_for_each_entry_safe(pos, n, head, member) \
for (pos = easy_list_entry((head)->next, typeof(*pos), member), \
n = easy_list_e...