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condition uses notify interface for notifications

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This commit is contained in:
Oliver Kowalke
2013-02-03 15:55:10 +01:00
parent 9c4bbb2ba4
commit 37f2ad6f48
2 changed files with 52 additions and 296 deletions
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66
src/condition.cpp
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@@ -22,9 +22,6 @@ namespace boost {
namespace fibers {
condition::condition() :
cmd_( SLEEPING),
waiters_( 0),
enter_mtx_(),
waiting_mtx_(),
waiting_()
{}
@@ -35,68 +32,31 @@ condition::~condition()
void
condition::notify_one()
{
// This mutex guarantees that no other thread can enter to the
// wait method logic, so that thread count will be
// constant until the function writes a NOTIFY_ONE command.
// It also guarantees that no other notification can be signaled
// on this condition before this one ends
enter_mtx_.lock();
detail::notify::ptr_t n;
// Return if there are no waiters
if ( waiting_.empty() )
{
BOOST_ASSERT( 0 == waiters_);
enter_mtx_.unlock();
return;
}
else
{
if ( waiting_.front() )
waiting_.front()->wake_up();
unique_lock< detail::spinlock > lk( waiting_mtx_);
if ( ! waiting_.empty() ) {
n.swap( waiting_.front() );
waiting_.pop_front();
}
lk.unlock();
// Notify that all fibers should execute wait logic
command expected = SLEEPING;
while ( ! cmd_.compare_exchange_strong( expected, NOTIFY_ONE) )
{
// if ( this_fiber::is_fiberized() )
// this_fiber::yield();
expected = SLEEPING;
}
if ( n)
n->wake_up();
}
void
condition::notify_all()
{
// This mutex guarantees that no other thread can enter to the
// wait method logic, so that thread count will be
// constant until the function writes a NOTIFY_ALL command.
// It also guarantees that no other notification can be signaled
// on this condition before this one ends
enter_mtx_.lock();
std::deque< detail::notify::ptr_t > waiting;
// Return if there are no waiters
if ( waiting_.empty() )
{
BOOST_ASSERT( 0 == waiters_);
enter_mtx_.unlock();
return;
}
else
{
BOOST_FOREACH( detail::fiber_base::ptr_t const& f, waiting_)
{ if ( f) f->wake_up(); }
waiting_.clear();
}
unique_lock< detail::spinlock > lk( waiting_mtx_);
waiting.swap( waiting_);
lk.unlock();
// Notify that all fibers should execute wait logic
command expected = SLEEPING;
while ( SLEEPING != cmd_.compare_exchange_strong( expected, NOTIFY_ALL) )
BOOST_FOREACH( detail::notify::ptr_t const& n, waiting)
{
// if ( this_fiber::is_fiberized() )
// this_fiber::yield();
expected = SLEEPING;
n->wake_up();
}
}