1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
#include "boost/fiber/waker.hpp"
#include "boost/fiber/context.hpp"
namespace boost {
namespace fibers {
bool
waker::wake() const noexcept {
BOOST_ASSERT(epoch_ > 0);
BOOST_ASSERT(ctx_ != nullptr);
return ctx_->wake(epoch_);
}
void
wait_queue::suspend_and_wait( detail::spinlock_lock & lk, context * active_ctx) {
waker_with_hook w{ active_ctx->create_waker() };
slist_.push_back(w);
// suspend this fiber
active_ctx->suspend( lk);
BOOST_ASSERT( ! w.is_linked() );
}
bool
wait_queue::suspend_and_wait_until( detail::spinlock_lock & lk,
context * active_ctx,
std::chrono::steady_clock::time_point const& timeout_time) {
waker_with_hook w{ active_ctx->create_waker() };
slist_.push_back(w);
// suspend this fiber
if ( ! active_ctx->wait_until( timeout_time, lk, waker(w)) ) {
// relock local lk
lk.lock();
// remove from waiting-queue
if ( w.is_linked()) {
slist_.remove( w);
}
lk.unlock();
return false;
}
return true;
}
void
wait_queue::notify_one() {
while ( ! slist_.empty() ) {
waker & w = slist_.front();
slist_.pop_front();
if ( w.wake()) {
break;
}
}
}
void
wait_queue::notify_all() {
while ( ! slist_.empty() ) {
waker & w = slist_.front();
slist_.pop_front();
w.wake();
}
}
bool
wait_queue::empty() const {
return slist_.empty();
}
}
}
|
