# IStreamWrapper

from pandac.PandaModules import IStreamWrapper

Class : IStreamWrapper
Description : This class provides a locking wrapper around an arbitrary istream pointer. A thread may use this class to perform an atomic seek/read/gcount operation.

## Inheritance:

IStreamWrapper: StreamWrapperBase
StreamWrapperBase:

## Methods of IStreamWrapper:

IStreamWrapper (Constructor)
getIstream

## Methods of StreamWrapperBase:

acquire
release

IStreamWrapper IStreamWrapper::IStreamWrapper(istream &stream); Description:

getIstream istream *IStreamWrapper::get_istream(void) const; Description: Returns the istream this object is wrapping.

acquire void StreamWrapperBase::acquire(void); Description: Acquires the internal lock. User code should call this to take temporary possession of the stream and perform direct I/O operations on it, for instance to make several sequential atomic reads. You may not call any of the StreamWrapper methods while the lock is held, other than release(). Use with extreme caution! This is a very low-level, non-recursive lock. You must call acquire() only once, and you must later call release() exactly once. Failing to do so may result in a hard deadlock with no available debugging features.

release void StreamWrapperBase::release(void); Description: Releases the internal lock. Must be called exactly once following a call to acquire(). See the cautions with acquire().