| [Overview][Constants][Types][Procedures and functions] | Reference for unit 'ipc' (#rtl) |
Create token from filename
Source position: ipc.pp line 104
function ftok( |
Path: pchar; |
ID: cint |
):TKey; |
ftok returns a key that can be used in a semgetshmget or msgget call to access a new or existing IPC resource.
Path is the name of a file in the file system, ID is a character of your choice. The ftok call does the same as it's C couterpart, so a pascal program and a C program will access the same resource if they use the same Path and ID
For an example, see msgctl, semctl or shmctl.
ftok returns -1 if the file in Path doesn't exist.
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Return the ID of a semaphore set, possibly creating the set |
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Return the ID of a shared memory block, possibly creating it |
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Return message queue ID, possibly creating the queue |
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