Timer Implementation in Pth
Hi,
My requirement is to have a timer implementation using Pth library.
The call shown below causes the callback func to be called at the specified
timeout:
-
---
main_func()
{
pth_ev = pth_event(PTH_EVENT_FUNC, func, NULL, pth_timeout(0,
50));
pth_wait(pth_ev); /* Thread waits here . it is signalled from
callback - func*/
}
However, the execution of the main_func thread is blocked until it is
signalled which happens when the callback is called.
int func(void * arg)
{
/* In timer callback */
}
I need to have a timer implementation similar to timer_init, timer_add,
timer_settime etcwhere the caller does not get blocked.
Is there a way of doing the same using Pth.?
Kind Regards,
Bhanu Kurpad
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Development Site http://www.ossp.org/pkg/lib/pth/
Distribution Files ftp://ftp.gnu.org/gnu/pth/
Distribution Snapshots ftp://ftp.ossp.org/pkg/lib/pth/
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Re: Timer Implementation in Pth
On Tuesday 22 June 2004 14:22, Vinu V wrote:
Hi,
My requirement is to have a timer implementation using Pth library.
The call shown below causes the callback func to be called at the
specified timeout:
---
-- ---
main_func()
{
pth_ev = pth_event(PTH_EVENT_FUNC, func, NULL, pth_timeout(0,
50));
pth_wait(pth_ev); /* Thread waits here . it is signalled from
callback - func*/
}
However, the execution of the main_func thread is blocked until it is
signalled which happens when the callback is called.
int func(void * arg)
{
/* In timer callback */
}
I need to have a timer implementation similar to timer_init, timer_add,
timer_settime etcwhere the caller does not get blocked.
Is there a way of doing the same using Pth.?
Kind Regards,
Bhanu Kurpad
If I was you I'd spawn a special timer thread. This thread would sleep for a
while and when it wakes up it would call the callback function and exit or
sleep again, depending on what kind of behaviour is needed.
Regards
Marc
__
GNU Portable Threads (Pth)http://www.gnu.org/software/pth/
Development Site http://www.ossp.org/pkg/lib/pth/
Distribution Files ftp://ftp.gnu.org/gnu/pth/
Distribution Snapshots ftp://ftp.ossp.org/pkg/lib/pth/
User Support Mailing List[EMAIL PROTECTED]
Automated List Manager (Majordomo) [EMAIL PROTECTED]
RE: Timer Implementation in Pth
Wouldn't it be a waste of resource of you were to create same number of
Threads as the Timers required. Instead if we had a functionality within pth
available that would be the best approach or use the underlying Target OS
Timer functionality to get the same functionality. Has there anyone used the
Target OS timer functionality with pth??
Regards,
Naveen
-Original Message-
From: Marc Laue [mailto:[EMAIL PROTECTED]
Sent: Tuesday, June 22, 2004 7:56 PM
To: [EMAIL PROTECTED]
Subject: Re: Timer Implementation in Pth
On Tuesday 22 June 2004 14:22, Vinu V wrote:
Hi,
My requirement is to have a timer implementation using Pth library.
The call shown below causes the callback func to be called at the
specified timeout:
---
-- ---
main_func()
{
pth_ev = pth_event(PTH_EVENT_FUNC, func, NULL, pth_timeout(0,
50));
pth_wait(pth_ev); /* Thread waits here . it is signalled from
callback - func*/
}
However, the execution of the main_func thread is blocked until it is
signalled which happens when the callback is called.
int func(void * arg)
{
/* In timer callback */
}
I need to have a timer implementation similar to timer_init, timer_add,
timer_settime etcwhere the caller does not get blocked.
Is there a way of doing the same using Pth.?
Kind Regards,
Bhanu Kurpad
If I was you I'd spawn a special timer thread. This thread would sleep for
a
while and when it wakes up it would call the callback function and exit or
sleep again, depending on what kind of behaviour is needed.
Regards
Marc
__
GNU Portable Threads (Pth)http://www.gnu.org/software/pth/
Development Site http://www.ossp.org/pkg/lib/pth/
Distribution Files ftp://ftp.gnu.org/gnu/pth/
Distribution Snapshots ftp://ftp.ossp.org/pkg/lib/pth/
User Support Mailing List[EMAIL PROTECTED]
Automated List Manager (Majordomo) [EMAIL PROTECTED]
DISCLAIMER:
This message (including attachment if any) is confidential and may be privileged.
Before opening attachments please check them for viruses and defects. MindTree
Consulting Private Limited (MindTree) will not be responsible for any viruses or
defects or any forwarded attachments emanating either from within MindTree or outside.
If you have received this message by mistake please notify the sender by return
e-mail and delete this message from your system. Any unauthorized use or dissemination
of this message in whole or in part is strictly prohibited. Please note that e-mails
are susceptible to change and MindTree shall not be liable for any improper, untimely
or incomplete transmission.
__
GNU Portable Threads (Pth)http://www.gnu.org/software/pth/
Development Site http://www.ossp.org/pkg/lib/pth/
Distribution Files ftp://ftp.gnu.org/gnu/pth/
Distribution Snapshots ftp://ftp.ossp.org/pkg/lib/pth/
User Support Mailing List[EMAIL PROTECTED]
Automated List Manager (Majordomo) [EMAIL PROTECTED]
RE: Timer Implementation in Pth
Wouldn't it be a waste of resource of you were to create same number of Threads as the Timers required. Yes, it would. Instead if we had a functionality within pth available that would be the best approach or use the underlying Target OS Timer functionality to get the same functionality. Has there anyone used the Target OS timer functionality with pth?? Just create one thread to handle all the timers. It computes the time until the next timer fires and does a pthread_cond_timedwait for that amount of time. Just make sure to signal the condition variable if you add a new timer that expires before all existing timers. I recommend storing the timers as a linked list in firing order. DS __ GNU Portable Threads (Pth)http://www.gnu.org/software/pth/ Development Site http://www.ossp.org/pkg/lib/pth/ Distribution Files ftp://ftp.gnu.org/gnu/pth/ Distribution Snapshots ftp://ftp.ossp.org/pkg/lib/pth/ User Support Mailing List[EMAIL PROTECTED] Automated List Manager (Majordomo) [EMAIL PROTECTED]
