Map to memory a section of the file starting at the specified offset from the start of the file and return a pointer to that memory. The section mapped is to be of the specified length. The behavior is undefined unless offset is a multiple of pageSize. Note that the memory is mapped for readonly access.

Synopsis

Declared in <bdls_fdstreambuf.h>

void*
mmap(
    std::streamoff offset,
    std::streamoff length);

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