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Xavier Thompson
typon-concurrency
Commits
c8f49ef0
Commit
c8f49ef0
authored
Aug 06, 2022
by
Xavier Thompson
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Refactor fork reclamation strategies into policies
parent
f79f9af7
Changes
3
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3 changed files
with
113 additions
and
78 deletions
+113
-78
rt/include/typon/fork.hpp
rt/include/typon/fork.hpp
+77
-55
rt/include/typon/forked.hpp
rt/include/typon/forked.hpp
+26
-23
rt/include/typon/typon.hpp
rt/include/typon/typon.hpp
+10
-0
No files found.
rt/include/typon/fork.hpp
View file @
c8f49ef0
...
...
@@ -5,6 +5,7 @@
#include <coroutine>
#include <cstdint>
#include <typon/defer.hpp>
#include <typon/forked.hpp>
#include <typon/result.hpp>
#include <typon/scheduler.hpp>
...
...
@@ -14,7 +15,73 @@
namespace
typon
{
template
<
typename
T
=
void
>
namespace
policy
{
struct
Bundle
{
void
on_final_suspend
(
std
::
coroutine_handle
<>
coroutine
)
noexcept
{
(
void
)
coroutine
;
}
struct
OnAwaitable
{
template
<
typename
Promise
>
void
on_await_suspend
(
std
::
coroutine_handle
<
Promise
>
coroutine
)
noexcept
{
(
void
)
coroutine
;
}
template
<
typename
Promise
>
auto
on_await_resume
(
std
::
coroutine_handle
<
Promise
>
coroutine
)
{
using
T
=
typename
Promise
::
value_type
;
auto
thefts
=
coroutine
.
promise
().
_span
->
_thefts
;
auto
rank
=
coroutine
.
promise
().
_rank
;
bool
ready
=
(
thefts
==
rank
);
if
(
!
ready
)
{
coroutine
.
promise
().
_span
->
_children
.
push_back
(
coroutine
);
}
return
Forked
<
T
>
(
coroutine
,
ready
,
nullptr
);
}
};
};
struct
Refcnt
{
ForkNode
_node
;
void
on_final_suspend
(
std
::
coroutine_handle
<>
coroutine
)
noexcept
{
(
void
)
coroutine
;
_node
.
decref
();
}
struct
OnAwaitable
{
template
<
typename
Promise
>
void
on_await_suspend
(
std
::
coroutine_handle
<
Promise
>
coroutine
)
noexcept
{
coroutine
.
promise
().
_policy
.
_node
.
_coroutine
=
coroutine
;
}
template
<
typename
Promise
>
auto
on_await_resume
(
std
::
coroutine_handle
<
Promise
>
coroutine
)
{
using
T
=
typename
Promise
::
value_type
;
auto
thefts
=
coroutine
.
promise
().
_span
->
_thefts
;
auto
rank
=
coroutine
.
promise
().
_rank
;
bool
ready
=
(
thefts
==
rank
);
auto
node
=
&
(
coroutine
.
promise
().
_policy
.
_node
);
return
Forked
<
T
>
(
coroutine
,
ready
,
node
);
}
};
};
}
template
<
typename
T
=
void
,
typename
Policy
=
policy
::
Refcnt
>
struct
[[
nodiscard
]]
Fork
{
struct
promise_type
;
...
...
@@ -36,11 +103,7 @@ namespace typon
{
Span
*
_span
;
u64
_rank
;
ForkNode
_node
;
promise_type
()
noexcept
:
_node
{
std
::
coroutine_handle
<
promise_type
>::
from_promise
(
*
this
)
}
{}
[[
no_unique_address
]]
Policy
_policy
;
Fork
get_return_object
()
noexcept
{
...
...
@@ -63,19 +126,11 @@ namespace typon
{
return
span
->
_coroutine
;
}
auto
rank
=
coroutine
.
promise
().
_rank
;
if
(
auto
&
exception
=
coroutine
.
promise
().
_exception
)
{
span
->
set_exception
(
exception
,
rank
);
}
if
(
!
(
rank
&
1
))
{
auto
&
ref
=
coroutine
.
promise
().
_node
.
_ref
;
if
(
!
ref
.
exchange
(
false
,
std
::
memory_order_acq_rel
))
{
coroutine
.
destroy
();
}
span
->
set_exception
(
exception
,
coroutine
.
promise
().
_rank
);
}
coroutine
.
promise
().
_policy
.
on_final_suspend
(
coroutine
);
u64
n
=
span
->
_n
.
fetch_sub
(
1
,
std
::
memory_order_acq_rel
);
if
(
n
==
1
)
{
...
...
@@ -92,42 +147,16 @@ namespace typon
struct
awaitable
:
std
::
suspend_always
{
std
::
coroutine_handle
<
promise_type
>
_coroutine
;
[[
no_unique_address
]]
Policy
::
OnAwaitable
_policy
;
template
<
typename
Promise
>
auto
await_suspend
(
std
::
coroutine_handle
<
Promise
>
continuation
)
noexcept
{
Span
*
span
=
&
(
continuation
.
promise
().
_span
);
_coroutine
.
promise
().
_span
=
span
;
_coroutine
.
promise
().
_rank
=
(
span
->
_thefts
<<
1
)
;
_coroutine
.
promise
().
_rank
=
span
->
_thefts
;
std
::
coroutine_handle
<>
on_stack_handle
=
_coroutine
;
Scheduler
::
push
(
span
);
return
on_stack_handle
;
}
auto
await_resume
()
{
auto
thefts
=
_coroutine
.
promise
().
_span
->
_thefts
;
auto
rank
=
_coroutine
.
promise
().
_rank
;
return
Forked
<
T
>
(
_coroutine
,
(
thefts
==
(
rank
>>
1
)),
true
);
}
};
auto
operator
co_await
()
&&
{
return
awaitable
{
{},
_coroutine
};
}
struct
noloop_awaitable
:
std
::
suspend_always
{
std
::
coroutine_handle
<
promise_type
>
_coroutine
;
template
<
typename
Promise
>
auto
await_suspend
(
std
::
coroutine_handle
<
Promise
>
continuation
)
noexcept
{
Span
*
span
=
&
(
continuation
.
promise
().
_span
);
_coroutine
.
promise
().
_span
=
span
;
_coroutine
.
promise
().
_rank
=
(
span
->
_thefts
<<
1
)
+
1
;
_policy
.
on_await_suspend
(
_coroutine
);
std
::
coroutine_handle
<>
on_stack_handle
=
_coroutine
;
Scheduler
::
push
(
span
);
...
...
@@ -136,20 +165,13 @@ namespace typon
auto
await_resume
()
{
auto
thefts
=
_coroutine
.
promise
().
_span
->
_thefts
;
auto
rank
=
_coroutine
.
promise
().
_rank
;
bool
ready
=
thefts
==
(
rank
>>
1
);
if
(
!
ready
)
{
_coroutine
.
promise
().
_span
->
_children
.
push_back
(
_coroutine
);
}
return
Forked
<
T
>
(
_coroutine
,
ready
,
false
);
return
_policy
.
on_await_resume
(
_coroutine
);
}
};
auto
noloop
()
&&
auto
operator
co_await
()
&&
{
return
noloop_awaitable
{
{},
_coroutine
};
return
awaitable
{
{},
_coroutine
,
{}
};
}
};
...
...
rt/include/typon/forked.hpp
View file @
c8f49ef0
...
...
@@ -17,6 +17,14 @@ namespace typon
{
std
::
coroutine_handle
<>
_coroutine
;
std
::
atomic
<
bool
>
_ref
{
true
};
void
decref
()
noexcept
{
if
(
!
_ref
.
exchange
(
false
,
std
::
memory_order_acq_rel
))
{
_coroutine
.
destroy
();
}
}
};
...
...
@@ -110,8 +118,8 @@ namespace typon
Result
<
T
>
*
_result
=
nullptr
;
template
<
typename
Promis
e
>
Forked
(
std
::
coroutine_handle
<
Promise
>
coroutine
,
bool
ready
,
bool
owning
)
template
<
typename
Coroutin
e
>
Forked
(
Coroutine
coroutine
,
bool
ready
,
ForkNode
*
node
)
{
if
(
ready
)
{
...
...
@@ -120,7 +128,7 @@ namespace typon
}
else
{
this
->
_node
=
owning
?
&
(
coroutine
.
promise
().
_node
)
:
nullptr
;
this
->
_node
=
node
;
_result
=
&
(
coroutine
.
promise
());
}
}
...
...
@@ -163,10 +171,7 @@ namespace typon
{
if
(
auto
node
=
this
->
_node
)
{
if
(
!
node
->
_ref
.
exchange
(
false
,
std
::
memory_order_acq_rel
))
{
node
->
_coroutine
.
destroy
();
}
node
->
decref
();
}
}
else
...
...
@@ -194,20 +199,21 @@ namespace typon
bool
_ready
;
Result
<
T
>
*
_result
;
ForkNode
*
_nod
e
;
void
*
_coroutin
e
;
template
<
typename
Promis
e
>
Forked
(
std
::
coroutine_handle
<
Promise
>
coroutine
,
bool
ready
,
bool
owning
)
template
<
typename
Coroutin
e
>
Forked
(
Coroutine
coroutine
,
bool
ready
,
ForkNode
*
node
)
{
_ready
=
ready
;
_result
=
&
(
coroutine
.
promise
());
_node
=
(
owning
|
ready
)
?
&
(
coroutine
.
promise
().
_node
)
:
nullptr
;
if
(
ready
)
{
if
(
auto
&
exception
=
coroutine
.
promise
().
_exception
)
{
std
::
rethrow_exception
(
exception
);
}
_coroutine
=
coroutine
.
address
();
coroutine
.
promise
().
get
();
}
else
{
_coroutine
=
node
;
}
}
...
...
@@ -217,31 +223,28 @@ namespace typon
Forked
(
Forked
&&
other
)
noexcept
:
_ready
(
other
.
_ready
)
,
_result
(
other
.
_result
)
,
_
node
(
std
::
exchange
(
other
.
_nod
e
,
nullptr
))
,
_
coroutine
(
std
::
exchange
(
other
.
_coroutin
e
,
nullptr
))
{}
Forked
&
operator
=
(
Forked
&&
other
)
noexcept
{
std
::
swap
(
_ready
,
other
.
_ready
);
std
::
swap
(
_node
,
other
.
_node
);
std
::
swap
(
_result
,
other
.
_result
);
std
::
swap
(
_coroutine
,
other
.
_coroutine
);
return
*
this
;
}
~
Forked
()
{
if
(
_
nod
e
)
if
(
_
coroutin
e
)
{
if
(
_ready
)
{
_node
->
_coroutine
.
destroy
();
std
::
coroutine_handle
<
void
>::
from_address
(
_coroutine
)
.
destroy
();
}
else
{
if
(
!
_node
->
_ref
.
exchange
(
false
,
std
::
memory_order_acq_rel
))
{
_node
->
_coroutine
.
destroy
();
}
reinterpret_cast
<
ForkNode
*>
(
_coroutine
)
->
decref
();
}
}
}
...
...
rt/include/typon/typon.hpp
View file @
c8f49ef0
...
...
@@ -26,6 +26,16 @@ namespace typon
}
template
<
typename
Policy
,
typename
Task
>
Fork
<
typename
Task
::
promise_type
::
value_type
,
Policy
>
fork
(
Task
task
)
{
// Put the task in a local variable to ensure its destructor will
// be called on co_return instead of only on coroutine destruction.
Task
local_task
=
std
::
move
(
task
);
co_return
co_await
std
::
move
(
local_task
);
}
template
<
typename
Task
>
Future
<
typename
Task
::
promise_type
::
value_type
>
future
(
Task
task
)
{
...
...
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