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// -*- C++ -*-
//
// $Id$
ACE_INLINE
ACE_Dev_Poll_Event_Tuple::ACE_Dev_Poll_Event_Tuple (void)
: event_handler (0),
mask (ACE_Event_Handler::NULL_MASK),
suspended (0),
refcount (1)
{
}
// ---------------------------------------------------------------------
#if 0
ACE_INLINE
ACE_Dev_Poll_Ready_Set::ACE_Dev_Poll_Ready_Set (void)
: pfds (0),
nfds (0)
{
}
#endif /* 0 */
// ---------------------------------------------------------------------
ACE_INLINE void
ACE_Dev_Poll_Reactor_Handler_Repository::mask (ACE_HANDLE handle,
ACE_Reactor_Mask mask)
{
ACE_TRACE ("ACE_Dev_Poll_Reactor_Handler_Repository::mask");
// Only bother to search for the handle if it's in range.
if (this->handle_in_range (handle))
this->handlers_[handle].mask = mask;
}
ACE_INLINE ACE_Reactor_Mask
ACE_Dev_Poll_Reactor_Handler_Repository::mask (ACE_HANDLE handle)
{
ACE_TRACE ("ACE_Dev_Poll_Reactor_Handler_Repository::mask");
ACE_Reactor_Mask mask = ACE_Event_Handler::NULL_MASK;
// Only bother to search for the handle if it's in range.
if (this->handle_in_range (handle))
mask = this->handlers_[handle].mask;
if (mask == ACE_Event_Handler::NULL_MASK)
errno = ENOENT;
return mask;
}
ACE_INLINE void
ACE_Dev_Poll_Reactor_Handler_Repository::suspend (ACE_HANDLE handle)
{
ACE_TRACE ("ACE_Dev_Poll_Reactor_Handler_Repository::suspend");
// Only bother to search for the handle if it's in range.
if (this->handle_in_range (handle))
this->handlers_[handle].suspended = 1;
}
ACE_INLINE void
ACE_Dev_Poll_Reactor_Handler_Repository::resume (ACE_HANDLE handle)
{
ACE_TRACE ("ACE_Dev_Poll_Reactor_Handler_Repository::resume");
// Only bother to search for the handle if it's in range.
if (this->handle_in_range (handle))
this->handlers_[handle].suspended = 0;
}
ACE_INLINE int
ACE_Dev_Poll_Reactor_Handler_Repository::suspended (ACE_HANDLE handle) const
{
ACE_TRACE ("ACE_Dev_Poll_Reactor_Handler_Repository::suspended");
if (this->handle_in_range (handle))
return this->handlers_[handle].suspended;
return -1;
}
ACE_INLINE size_t
ACE_Dev_Poll_Reactor_Handler_Repository::size (void) const
{
ACE_TRACE ("ACE_Dev_Poll_Reactor_Handler_Repository::size");
return this->max_size_;
}
ACE_INLINE unsigned long
ACE_Dev_Poll_Reactor_Handler_Repository::add_ref (ACE_HANDLE handle)
{
// ACE_TRACE ("ACE_Dev_Poll_Reactor_Handler_Repository::add_ref");
// Caller provides synchronization
if (this->handle_in_range (handle))
return this->handlers_[handle].refcount++;
return 0;
}
ACE_INLINE unsigned long
ACE_Dev_Poll_Reactor_Handler_Repository::remove_ref (ACE_HANDLE handle)
{
// ACE_TRACE ("ACE_Dev_Poll_Reactor_Handler_Repository::remove_ref");
// Caller provides synchronization
if (this->handle_in_range (handle))
{
unsigned long & refcount = this->handlers_[handle].refcount;
ACE_ASSERT (refcount > 0);
refcount--;
if (refcount != 0)
return refcount;
// Reference count dropped to zero. Remove the event handler
// from the repository.
this->unbind (handle);
}
return 0;
}
// -----------------------------------------------------------------
ACE_INLINE
ACE_Dev_Poll_Handler_Guard::ACE_Dev_Poll_Handler_Guard (
ACE_Dev_Poll_Reactor_Handler_Repository &repository,
ACE_HANDLE handle)
: repository_ (repository),
handle_ (handle)
{
// Caller must provide synchronization.
(void) repository.add_ref (handle);
/**
* @todo Suspend the handler so that other threads will not cause
* an event that is already in an upcall from being dispatched
* again.
*
* @note The naive approach would be to simply call
* suspend_handler_i() on the reactor. However, that would
* cause a system call (write()) to occur. Obviously this
* can potentially have an adverse affect on performance.
* Ideally, the handler would only be marked as "suspended" in
* the handler repository. If an event arrives for a
* suspended handler that event can be "queued" in a
* "handle readiness queue." "Queued" is quoted since a real
* queue need not be used since duplicate events can be
* coalesced, thus avoiding unbounded queue growth. Event
* coalescing is already done by Linux's event poll driver
* (/dev/epoll) so Solaris' poll driver (/dev/poll) is the
* main concern here. The largest the queue can be is the
* same size as the number of handlers stored in the handler
* repository.
*/
}
ACE_INLINE
ACE_Dev_Poll_Handler_Guard::~ACE_Dev_Poll_Handler_Guard (void)
{
// Caller must provide synchronization.
(void) this->repository_.remove_ref (this->handle_);
/**
* @todo Resume the handler so that other threads will be allowed to
* dispatch the handler.
*/
}
// ---------------------------------------------------------------------
ACE_INLINE int
ACE_Dev_Poll_Reactor::upcall (ACE_Event_Handler *event_handler,
int (ACE_Event_Handler::*callback)(ACE_HANDLE),
ACE_HANDLE handle)
{
// If the handler returns positive value (requesting a reactor
// callback) just call back as many times as the handler requests
// it. Other threads are off handling other things.
int status = 0;
do
{
status = (event_handler->*callback) (handle);
}
while (status > 0);
return status;
}
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