2015年4月28日 · I want to use mmap() to create a file containing some integers. I want to write to this file by writing to memory. I know that the data in memory is binary format and hence the …

2019年5月1日 · man mmap will help you here. It creates a memory mapping in the virtual address space of the process. It's creating an anonymous mapping, which is rather like using malloc to …

2008年11月3日 · In B's case any unmodified mmap'd pages can be reused immediately because the OS knows how to restore them from the existing file they were mmap'd from. (The OS can …

2011年1月24日 · Both malloc and mmap are thread-safe. Neither is async-signal-safe per POSIX. In practice, mmap probably works fine from a signal handler, but the whole idea of allocating …

2012年8月23日 · mmap can also be used for an anonymous mapping. This mapping is not backed by a file, and is basically a request for a chunk of memory. If that sounds similar to …

2007年10月24日 · mmap tutorial (C/C++) I am trying to learn how to use mmap and am actively looking for a good tutorial, or a set of good examples that demonstrate mmap use. I have read …

2016年10月13日 · How you limit it to 100 bytes is based on the API you're using; C itself has no concept of the "length" of a pointer (there are APIs for NUL-terminated strings, but raw file …

2014年11月21日 · #include <sys/mman.h> void *mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off); format of call: pa=mmap(addr, len, prot, flags, fildes, off); The mmap() function …

The mmap code is faster because for your program, mmap has resulted in either less disk access, or more efficient disk access, than whatever reads and writes you compared against. For …

2013年12月9日 · Segfault while using mmap in C for reading binary files. 1. Reading and writing a file using string ...