有多少种方法可以锁定C

Question

I am quite a newbie to c programming. Until now i only found pthread_mutex_lock can make the code region run only by one thread. Does there are any other ways to implement a lock? Or every other way to do a lock is still use pthread_mutex_lock function?

Answer 1

Threads were only introduced into the ISO C standard with C11, a rather recent edition to the standard so not necessarily widely supported yet.

You need to look into threads.h and the mtx_* functions for an understanding of that.

Before then, pthreads was probably your best bet with its wide implementation although, not being standard C ^(a) , its support wasn't mandated.

For example, Windows has its own way of doing threading, using functions like CreateThread .

However, there are various third-party products such as pthreads-win32 that aim to give pthreads support to Windows, to assist in porting of applications from POSIX-compliant operating systems.

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^(a) It is a POSIX standard (part of IEEE 1003.1) so that may be good enough for some people.

Answer 2

There is no way to lock in the c language. Operating systems might provide support for locking (without regard for the language), and libraries such as pthreads can take advantage of operating system services, however this is beside the language. (By contast, other languages have native locking built into them, such as through Java's synchronized keyword.)