[haiku-bugs] Re: [Haiku] #4888: proposal for pthreads extensions for suspend/resume
- From: "andrewbachmann" <trac@xxxxxxxxxxxx>
- Date: Wed, 16 Dec 2009 07:12:06 -0000
#4888: proposal for pthreads extensions for suspend/resume
--------------------------------+-------------------------------------------
Reporter: andrewbachmann | Owner: axeld
Type: enhancement | Status: closed
Priority: normal | Milestone: R1
Component: System/libroot.so | Version:
Resolution: invalid | Keywords:
Blockedby: | Platform: All
Blocking: |
--------------------------------+-------------------------------------------
Comment(by andrewbachmann):
I didn't see the replies to this issue until just now, for some reason I
didn't get email notification.
In OpenJDK, in os_solaris.[hc]pp the methods thr_create and thr_continue
are used to create and start the pthreads corresponding to java threads.
thr_create is called with a flag to start suspended, which allows for
reliable and straightforward java thread initiation.
In POSIX, flags such as THREAD_SUSPENDED (solaris) are provided via
attributes. This was my rationale for proposing the
pthread_attr_(get/set)startsuspended.
With the addition of the get_pthread_thread_id(), I am fine with not
supplying pthread_suspend and pthread_continue. It does seem odd to
require a pthread-oriented program to go through the thread_id in order to
perform this functionality.
There are two barriers to creating the thread through spawn_thread. The
first is that spawn_thread doesn't provide a means to specify the stack
size. (functionality used by OpenJDK) The second is the lack of the
proposed convert_to_pthread() method, which would be required to maintain
the rest of the code using pthread methods.
I believe my proposal is the simplest and smallest change to provide the
functionality used by OpenJDK.
--
Ticket URL: <http://dev.haiku-os.org/ticket/4888#comment:9>
Haiku <http://dev.haiku-os.org>
Haiku - the operating system.
Other related posts:
