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ctThrdSemapInit
Initialize a semaphore.
Short Name
ctThrdSemapInit()
Type
Threading function
Declaration
NINT ctThrdSemapInit(pctSEMAP semap, NINT count)
Description
A semaphore is a synchronization object that may be acquired by more than one thread at a time, and may be released by a thread that has not acquired it. The count parameter specifies the maximum number of threads that may acquire it simultaneously. The semap parameter is the address of an object of type ctSEMAP.
Return
Value |
Symbolic Constant |
Explanation |
|---|---|---|
0 |
NO_ERROR |
Successful function. |
10 |
SPAC_ERR |
Too much space required. |
639 |
TZRO_ERR |
count < 1. |
640 |
TINT_ERR |
Semaphore already initialized. |
See FairCom DB Error Codes for a complete listing of valid FairCom DB error values.
Limitations
Can only be used with a ctThrd library.
See also
ctThrdSemapCls, ctThrdSemapGet, ctThrdSemapRel, ctThrdSemapTry
