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Does session state have a locking mechanism that serialize the access to state?

Platform: ASP.NET| Category: Session

Session state implements a reader/writer locking mechanism:

  • A page (or frame) that has session state write access (e.g. <%@ Page EnableSessionState=’True’ %>) will hold a writer lock on the session until the request finishes.
  • A page (or frame) that has session state read access (e.g. <%@ Page EnableSessionState=’ReadOnly’ %>) will hold a reader lock on the session until the request finishes.
  • Reader lock will block a writer lock; Reader lock will NOT block reader lock; Writer lock will block all reader and writer lock.
  • That’s why if two frames both have session state write access, one frame has to wait for the other to finish first

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