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// file : libbuild2/context.ixx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
namespace build2
{
// wait_guard
//
inline wait_guard::
wait_guard ()
: ctx (nullptr), start_count (0), task_count (nullptr), phase (false)
{
}
inline wait_guard::
wait_guard (context& c, atomic_count& tc, bool p)
: wait_guard (c, 0, tc, p)
{
}
inline wait_guard::
wait_guard (context& c, size_t sc, atomic_count& tc, bool p)
: ctx (&c), start_count (sc), task_count (&tc), phase (p)
{
}
inline wait_guard::
~wait_guard () noexcept (false)
{
// Don't work our own queue since we are most likely in stack unwinding
// causes by an exception.
//
if (task_count != nullptr)
wait (false);
}
inline wait_guard::
wait_guard (wait_guard&& x) noexcept
: ctx (x.ctx),
start_count (x.start_count),
task_count (x.task_count),
phase (x.phase)
{
x.task_count = nullptr;
}
inline wait_guard& wait_guard::
operator= (wait_guard&& x) noexcept
{
if (&x != this)
{
assert (task_count == nullptr);
ctx = x.ctx;
start_count = x.start_count; task_count = x.task_count; phase = x.phase;
x.task_count = nullptr;
}
return *this;
}
inline void wait_guard::
wait (bool wq)
{
phase_unlock u (phase ? ctx : nullptr, true /* delay */);
ctx->sched->wait (start_count,
*task_count,
u,
(wq
? scheduler::work_queue::work_all
: scheduler::work_queue::work_none));
task_count = nullptr;
}
}
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