Map a file section into read‐only memory.
Synopsis
Declared in <bdls_fdstreambuf.h>
void*
mmap(
std::streamoff offset,
std::streamoff length);Description
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.
Return Value
pointer to the mapped read‐only memory
Parameters
Name |
Description |
offset |
byte offset from the start of the file |
length |
length in bytes of the section to map |
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