SharedMemory 1.3.1

SharedMemory

SharedMemory

Python shared memory library based an posix-ipc.

Features

• Shared type:
  • Basic type (int, float, bool, str)
  • list, tuple, dict and nparray
• Management of the availability of shared memory space
• Overloaded methods for list and dict
• Semaphore

Future improvement

• Timeout for Semaphore
• Adding more tests

Example

Example of execution in two instances of ipython.

Client side

In [1]: from SharedMemory import SharedMemory

In [2]: # Creating client instance with a shared space named 'shared_space' with a size of 10
   ...: C = SharedMemory(name="shared_space", value="Hello", client=True)

In [4]: C.getAvailability()
Out[4]: True

In [5]: C.getValue()
Out[5]: 'Hello'

In [6]: # Waiting for Server to update shared data

In [7]: C.getValue()
Out[7]: 'World'

In [8]: C.setValue('HW')
Out[8]: True

In [9]: C.getValue()
Out[9]: 'HW'

In [10]: # Closing the client side
    ...: C.close()

In [11]: C.getAvailability()
Out[11]: False

Server side

In [1]: from SharedMemory import SharedMemory

In [2]: # Creating server instance access to the shared named 'shared_space'
   ...: S = SharedMemory(name="shared_space", client=False)

In [4]: S.getAvailability()
Out[4]: True

In [5]: S.getValue()
Out[5]: 'Hello'

In [6]: S.setValue("World")
Out[6]: True

In [7]: S.getValue()
Out[7]: 'Hello'

In [8]: # Waiting for Client to update shared data

In [9]: S.getValue()
Out[9]: 'HW'

In [10]: # Waiting Client to close the shared space

In [11]: S.getAvailability()
Out[11]: False


In [12]: # Closing the server side
    ...: S.close()
INFO: Client already stopped.

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