Shared memory blocking method and system

A shared memory blocking system wherein the system blocks shared memory by a method comprising:

• providing a call to reserve a memory page for a requesting process;
• filtering the reserve call according to whether the page can be shared;
• providing a call to commit the memory page for the requesting process or for a subsequent requesting process;
• filtering the commit call according to whether the page can be shared and whether the process can be secured;
• wherein filtering the commit call comprises:
• determining, by accessing a shared memory list, if the page is shared by another process;
• if the page is shared, determining whether either of the sharing processes are secured by accessing a secured process list;
• and
• if either process is secured, disallowing page sharing;
• or
• if both processes are not secured, creating a new shared memory record, updating the share count for processes sharing the page and updating the shared memory list with information contained in the new record;
• or
• if the page is not shared, completing the commit request.

A secured data transmission system having a receiver to access secured file content provided by a sender, wherein the receiver includes a shared memory blocking system wherein the system blocks shared memory by a method comprising:

• providing a call to reserve a memory page for a requesting process;
• filtering the reserve call according to whether the page can be shared;
• providing a call to commit the memory page for the requesting process or for a subsequent requesting process;
• filtering the commit call according to whether the page can be shared and whether the process can be secured;
• providing a call to free the memory page of all address spaces;
• determining whether the process is secured by checking a secured process list;
• and
• if the process is secured, overwriting the page to delete secured data, and deleting all records in the shared memory list with a page number the same as the overwritten page;
• or
• if the process is not secured deleting all records from a shared memory list with a page number corresponding to the unsecured process page.

A computer configured to block shared memory by a method comprising:

• providing a call to reserve a memory page for a requesting process;
• filtering the reserve call according to whether the page can be shared;
• providing a call to commit the memory page for the requesting process or for a subsequent requesting process;
• filtering the commit call according to whether the page can be shared and whether the process can be secured;
• wherein filtering the reserve call comprises:
• determining whether the page can be shared based on request parameters;
• and
• the page cannot be shared, allowing the request to be completed;
• or
• if the page can be shared, tracking the reserve call by creating a record and entering the record into a shared memory list.

A computer-readable medium programmed to block shared memory by a method comprising:

• providing a call to reserve a memory page for a requesting process;
• filtering the reserve call according to whether the page can be shared;
• providing a call to commit the memory page for the requesting process or for a subsequent requesting process;
• filtering the commit call according to whether the page can be shared and whether the process can be secured;
• wherein filtering the commit call comprises:
• determining, by accessing a shared memory list, if the page is shared by another process;
• if the page is shared, determining whether either of the sharing processes are secured by accessing a secured process list;
• and
• if either process is secured, disallowing page sharing;
• or
• if both processes are not secured, creating a new shared memory record, updating the share count for processes sharing the page and updating the shared memory list with information contained in the new record;
• or
• if the page is not shared, completing the commit request.