#includestruct MyObject { int value; // implementation details }; using Handle = boost::handle ; int main() { boost::handle_resource_pool pool(10); { Handle handle1(pool); handle1->value = 42; } { Handle handle2 = pool.get_handle(); assert(handle2->value == 0); handle2->value = 24; } // both handles are automatically destroyed when they go out of scope }
#includeIn both examples, the handles are created using a library or framework, and are used to manage access to underlying resources. The Boost example uses a custom handle implementation to manage object lifetimes, while the Windows API example uses system-provided handles to manage file access.int main() { HANDLE fileHandle = CreateFile( "file.txt", GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL ); if (fileHandle != INVALID_HANDLE_VALUE) { // use the file handle to read from the file CloseHandle(fileHandle); } }