Parsing of file locks, mutex locks, and read/write locks in PHP programs ,. The use of file locks, mutex locks, and read/write locks in PHP programs is skillful in parsing. all file locks are called advisoryfilelock, which is mentioned in the book.
The full name of the file lock is advisoryfilelock, which is mentioned in the book. Such locks are common. For example, after mysql and php-fpm are started, a pid file records the process id, which is the file lock. This lock prevents repeated
This article mainly introduces the parsing of file locks, mutex locks, and read/write locks in PHP programs. it focuses on the examples used in the sync module and the pthreads module. For more information, see
File lockThe full name is advisory
This article mainly introduced the PHP program in the file lock, mutual exclusion lock, read-write lock using skills analysis, which focuses on the Sync module and pthreads module use examples, the need for friends can refer to. We hope to help you.
[ArticleAuthor: Sun Li link: http://www.cnblogs.com/sunli/ updated by: 2010-07-27]
Last Saturday, I attended the csdn Tup event. In the last session, Tim Yang talked about Weibo cache design. I personally think it is very good and well-spoken, two
PHP program in the file lock, mutex, read and write the use of skills analysis,
File lockFull name advisory file lock, which is mentioned in the book. This type of lock is more common, such as MySQL, after php-fpm boot, there will be a PID file
Recently, we need to add a lock mechanism to the cache layer. Some Google Documents found that APC was not implemented (as if eaccelerator was used and never used). Only one lock is available, it is also relatively simple to implement with APC
File lockThe name is advisory file lock, which is mentioned in the book. This type of lock is more common, such as MySQL, PHP-FPM Boot will have a PID file records the process ID, this file is a file lock.
This lock prevents a process from running
CLI crashes when Pthreads uses mutex locking (WIN7)
Code:
If you can tell me where the PHP system log can be (similar to Apache Error.log).
Add:
According to the official given pthreads is thread-safe, in theory, thread safety itself is
PHP Semaphore Basic Usage example detailed, PHP signal example detailed
The basic usage of PHP semaphore is described in this paper. Share to everyone for your reference, as follows:
Some theoretical foundations:
Semaphore: Also known as semaphore,
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