![]() | |||||||||||
Messages in this thread |
sylvanino b wrote: >Hello, > >I have a question about ways of accessing a file. > >I know it is possible to use: fseek + fwrite/fread to access a file. >and It is also possible to map file in memory with "mmap" function, >and access it by adressing memory. > >Currently I use the frame buffer of mobile phones with mmap function. >For my understanding, I would like to know what is the difference >between using fseek+fwrite compared to mmap style. >Dont hesitate to be precise or to use technical terms. > >Thanks you, > > There may be subtle performance differences, but I'd say the most important here is to use the API that best suits the problem at hand. fwrite/fread is sequential in nature, useful when you want to read/write large contigous chunks of data, and when the notion of a "current position" in the file is useful. mmap is nice when you find it useful to access the file as a random-access array of bytes. mmap style access seems to be the best fit for a framebuffer. Helge Hafting Helge Hafting - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
| Last update: 2005-05-20 11:34 [from the cache] ©2003-2008 | |||||||||||