[Overview][Constants][Types][Procedures and functions][Index] |
Perform semaphore operation.
Source position: ipc.pp line 511
function semop( |
semid: cint; |
sops: PSEMbuf; |
nsops: cuint |
):cint; |
semop performs a set of operations on a message queue. sops points to an array of type TSEMbuf. The array should contain nsops elements.
The fields of the TSEMbuf structure
TSEMbuf = record sem_num : word; sem_op : integer; sem_flg : integer;
should be filled as follows:
The function returns True if the operations were successful, False otherwise.
In case of error, False is returned, and IPCerror is set.
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Return the ID of a semaphore set, possibly creating the set |
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Perform various control operations on a semaphore set |
lazarus-ccr.sourceforge.net |