Re: Semaphore
Re: Semaphore
- Subject: Re: Semaphore
- From: "Rakesh Singhal" <email@hidden>
- Date: Fri, 28 Nov 2008 09:54:19 +0530
Thanks. Now I am using following set of APIs:
ftok()
semget()
semop()
semctl()
It is working till now :)
Regards
rksinghal
On Thu, Nov 27, 2008 at 9:49 AM, Terry Lambert <email@hidden> wrote:
> On Nov 26, 2008, at 7:31 PM, Rakesh Singhal wrote:
>>
>> Hi all
>>
>> I tried to use sem_init() but I think it is not there to use. It is
>> declared in semaphore.h but when I do man sem_init() then it gives the
>> message "No manual entry for sem_init".
>>
>> Now, I am using sem_open(). I think it is right API to create unique
>> semaphore between multi-processes. But creating it in one process if I
>> try to create in another process, the value of semaphore is not same.
>> I am using same name in both process(1st argument of sem_open()).
>>
>> Please suggest to create semaphore (cross-processes).
>
> POSIX unnamed semaphores are not supported.
>
> Use either POSIX named semaphores, or use System V semaphores:
>
> man sem_open
> man semget
>
> -- Terry
>
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| References: | |
| | >Semaphore (From: "Rakesh Singhal" <email@hidden>) |
| | >Re: Semaphore (From: Terry Lambert <email@hidden>) |