semget(2) - value of newly created semaphores? - Thread - go-pugleaf

Thread View: comp.unix.programmer

1 messages

[T] Back to Threads [V] Tree View [G] Group Articles

1 total messages Started by Johannes Sjogren Wed, 17 Oct 1990 23:00

semget(2) - value of newly created semaphores?

#1048

Author: Johannes Sjogren
Date: Wed, 17 Oct 1990 23:00

19 lines
1124 bytes

I have a question about the behaviour of the semget(2) system call.

If I do

	semid = semget(SEMKEY, 1, 0777|IPC_CREAT);

and a new semaphore is created, is the value  of a newly created
semaphore guaranteed to be initialized to 0?

On DG/UX 4.30 the manual page for semget says this is the case.
On most other systems however the manual page says the value is undefined.
Is there any reason why the semaphore value shouldn't be reset to 0 
on creation? 
Maybe the (I suppose) system V derived "normal" manual pages are wrong?

-- 
  Johannes Sjogren				sgren@dynas.se
  DynaSoft, Dynamic Software AB			Phone: +46-8-726 85 60
  Liljeholmsv 10, S-117 43 STOCKHOLM, SWEDEN	Fax: +46-8-18 11 45

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads