32 lines
924 B
C++
32 lines
924 B
C++
#include <mrw/auto.hpp>
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#include <unistd.h> // close
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#include <sys/stat.h> // fstat
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#include <sys/mman.h> // mmap
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namespace mrw {
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//----------------------------------------------------------------------------
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AutoFile& AutoFile::reset(int fd) throw() {
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if (_fd!=-1) close(_fd);
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_fd = fd;
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return *this;
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}
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//----------------------------------------------------------------------------
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AutoMapper::AutoMapper(int fd, size_t sz, void* addr,
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int prot, int flags, off_t off) throw() {
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if (!(_sz=sz)) {
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struct stat st;
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if (fd==-1 || fstat(fd, &st)==-1) {release(); return;}
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_sz = st.st_size;
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}
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if ((_cont=mmap(addr, _sz, prot, flags, fd, off))==MAP_FAILED) release();
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}
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//----------------------------------------------------------------------------
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AutoMapper::~AutoMapper() throw() {
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if (_cont && _sz) munmap(_cont, _sz);
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}
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}
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