Method munmap

src/basicio.cpp:190–223

}

int FileIo::munmap() {
  int rc = 0;
  if (p_->pMappedArea_) {
#if defined _WIN32
    UnmapViewOfFile(p_->pMappedArea_);
    CloseHandle(p_->hMap_);
    p_->hMap_ = nullptr;
    CloseHandle(p_->hFile_);
    p_->hFile_ = nullptr;
#elif __has_include(<sys/mman.h>)
    if (::munmap(p_->pMappedArea_, p_->mappedLength_) != 0) {
      rc = 1;
    }
#else
#error Platforms without mmap are not supported. See https://github.com/Exiv2/exiv2/issues/2380
    if (p_->isWriteable_) {
      seek(0, BasicIo::beg);
      write(p_->pMappedArea_, p_->mappedLength_);
    }
    if (p_->isMalloced_) {
      delete[] p_->pMappedArea_;
      p_->isMalloced_ = false;
    }
#endif
  }
  if (p_->isWriteable_) {
    if (p_->fp_)
      p_->switchMode(Impl::opRead);
    p_->isWriteable_ = false;
  }
  p_->pMappedArea_ = nullptr;
  p_->mappedLength_ = 0;
  return rc;
}

byte* FileIo::mmap(bool isWriteable) {
  if (munmap() != 0) {