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pythonnet/src/runtime/StateSerialization/RuntimeData.cs at master · askdaddy/pythonnet · GitHub
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runtime
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StateSerialization
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RuntimeData.cs
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using
System
;
using
System
.
Collections
;
using
System
.
Collections
.
Generic
;
using
System
.
Collections
.
ObjectModel
;
using
System
.
Diagnostics
;
using
System
.
IO
;
using
System
.
Linq
;
using
System
.
Runtime
.
InteropServices
;
using
System
.
Runtime
.
Serialization
;
using
System
.
Runtime
.
Serialization
.
Formatters
.
Binary
;
using
Python
.
Runtime
.
StateSerialization
;
using
static
Python
.
Runtime
.
Runtime
;
namespace
Python
.
Runtime
{
public
static
class
RuntimeData
{
private
static
Type
?
_formatterType
;
public
static
Type
?
FormatterType
{
get
=>
_formatterType
;
set
{
if
(
!
typeof
(
IFormatter
)
.
IsAssignableFrom
(
value
)
)
{
throw
new
ArgumentException
(
"Not a type implemented IFormatter"
)
;
}
_formatterType
=
value
;
}
}
public
static
ICLRObjectStorer
?
WrappersStorer
{
get
;
set
;
}
/// <summary>
/// Clears the old "clr_data" entry if a previous one is present.
/// </summary>
static
void
ClearCLRData
(
)
{
BorrowedReference
capsule
=
PySys_GetObject
(
"clr_data"
)
;
if
(
!
capsule
.
IsNull
)
{
IntPtr
oldData
=
PyCapsule_GetPointer
(
capsule
,
IntPtr
.
Zero
)
;
PyMem_Free
(
oldData
)
;
PyCapsule_SetPointer
(
capsule
,
IntPtr
.
Zero
)
;
}
}
internal
static
void
Stash
(
)
{
var
runtimeStorage
=
new
PythonNetState
{
Metatype
=
MetaType
.
SaveRuntimeData
(
)
,
ImportHookState
=
ImportHook
.
SaveRuntimeData
(
)
,
Types
=
TypeManager
.
SaveRuntimeData
(
)
,
Classes
=
ClassManager
.
SaveRuntimeData
(
)
,
SharedObjects
=
SaveRuntimeDataObjects
(
)
,
}
;
IFormatter
formatter
=
CreateFormatter
(
)
;
var
ms
=
new
MemoryStream
(
)
;
formatter
.
Serialize
(
ms
,
runtimeStorage
)
;
Debug
.
Assert
(
ms
.
Length
<=
int
.
MaxValue
)
;
byte
[
]
data
=
ms
.
GetBuffer
(
)
;
// TODO: use buffer api instead
IntPtr
mem
=
PyMem_Malloc
(
ms
.
Length
+
IntPtr
.
Size
)
;
Marshal
.
WriteIntPtr
(
mem
,
(
IntPtr
)
ms
.
Length
)
;
Marshal
.
Copy
(
data
,
0
,
mem
+
IntPtr
.
Size
,
(
int
)
ms
.
Length
)
;
ClearCLRData
(
)
;
using
NewReference
capsule
=
PyCapsule_New
(
mem
,
IntPtr
.
Zero
,
IntPtr
.
Zero
)
;
int
res
=
PySys_SetObject
(
"clr_data"
,
capsule
.
BorrowOrThrow
(
)
)
;
PythonException
.
ThrowIfIsNotZero
(
res
)
;
}
internal
static
void
RestoreRuntimeData
(
)
{
try
{
RestoreRuntimeDataImpl
(
)
;
}
finally
{
ClearStash
(
)
;
}
}
private
static
void
RestoreRuntimeDataImpl
(
)
{
BorrowedReference
capsule
=
PySys_GetObject
(
"clr_data"
)
;
if
(
capsule
.
IsNull
)
{
return
;
}
IntPtr
mem
=
PyCapsule_GetPointer
(
capsule
,
IntPtr
.
Zero
)
;
int
length
=
(
int
)
Marshal
.
ReadIntPtr
(
mem
)
;
byte
[
]
data
=
new
byte
[
length
]
;
Marshal
.
Copy
(
mem
+
IntPtr
.
Size
,
data
,
0
,
length
)
;
var
ms
=
new
MemoryStream
(
data
)
;
var
formatter
=
CreateFormatter
(
)
;
var
storage
=
(
PythonNetState
)
formatter
.
Deserialize
(
ms
)
;
PyCLRMetaType
=
MetaType
.
RestoreRuntimeData
(
storage
.
Metatype
)
;
TypeManager
.
RestoreRuntimeData
(
storage
.
Types
)
;
ClassManager
.
RestoreRuntimeData
(
storage
.
Classes
)
;
RestoreRuntimeDataObjects
(
storage
.
SharedObjects
)
;
ImportHook
.
RestoreRuntimeData
(
storage
.
ImportHookState
)
;
}
public
static
bool
HasStashData
(
)
{
return
!
PySys_GetObject
(
"clr_data"
)
.
IsNull
;
}
public
static
void
ClearStash
(
)
{
PySys_SetObject
(
"clr_data"
,
default
)
;
}
static
bool
CheckSerializable
(
object
o
)
{
Type
type
=
o
.
GetType
(
)
;
do
{
if
(
!
type
.
IsSerializable
)
{
return
false
;
}
}
while
(
(
type
=
type
.
BaseType
)
!=
null
)
;
return
true
;
}
private
static
SharedObjectsState
SaveRuntimeDataObjects
(
)
{
var
contexts
=
new
Dictionary
<
PyObject
,
Dictionary
<
string
,
object
?
>
>
(
PythonReferenceComparer
.
Instance
)
;
var
extensionObjs
=
new
Dictionary
<
PyObject
,
ExtensionType
>
(
PythonReferenceComparer
.
Instance
)
;
// make a copy with strongly typed references to avoid concurrent modification
var
extensions
=
ExtensionType
.
loadedExtensions
.
Select
(
addr
=>
new
PyObject
(
new
BorrowedReference
(
addr
)
,
// if we don't skip collect, finalizer might modify loadedExtensions
skipCollect
:
true
)
)
.
ToArray
(
)
;
foreach
(
var
pyObj
in
extensions
)
{
var
extension
=
(
ExtensionType
)
ManagedType
.
GetManagedObject
(
pyObj
)
!
;
Debug
.
Assert
(
CheckSerializable
(
extension
)
)
;
var
context
=
extension
.
Save
(
pyObj
)
;
if
(
context
is
not
null
)
{
contexts
[
pyObj
]
=
context
;
}
extensionObjs
.
Add
(
pyObj
,
extension
)
;
}
var
wrappers
=
new
Dictionary
<
object
,
List
<
CLRObject
>
>
(
)
;
var
userObjects
=
new
CLRWrapperCollection
(
)
;
// make a copy with strongly typed references to avoid concurrent modification
var
reflectedObjects
=
CLRObject
.
reflectedObjects
.
Select
(
addr
=>
new
PyObject
(
new
BorrowedReference
(
addr
)
,
// if we don't skip collect, finalizer might modify reflectedObjects
skipCollect
:
true
)
)
.
ToList
(
)
;
foreach
(
var
pyObj
in
reflectedObjects
)
{
// Wrapper must be the CLRObject
var
clrObj
=
(
CLRObject
)
ManagedType
.
GetManagedObject
(
pyObj
)
!
;
object
inst
=
clrObj
.
inst
;
List
<
CLRObject
>
mappedObjs
;
if
(
!
userObjects
.
TryGetValue
(
inst
,
out
var
item
)
)
{
item
=
new
CLRMappedItem
(
inst
)
;
userObjects
.
Add
(
item
)
;
Debug
.
Assert
(
!
wrappers
.
ContainsKey
(
inst
)
)
;
mappedObjs
=
new
List
<
CLRObject
>
(
)
;
wrappers
.
Add
(
inst
,
mappedObjs
)
;
}
else
{
mappedObjs
=
wrappers
[
inst
]
;
}
item
.
AddRef
(
pyObj
)
;
mappedObjs
.
Add
(
clrObj
)
;
}
var
wrapperStorage
=
new
Dictionary
<
string
,
object
?
>
(
)
;
WrappersStorer
?
.
Store
(
userObjects
,
wrapperStorage
)
;
var
internalStores
=
new
Dictionary
<
PyObject
,
CLRObject
>
(
PythonReferenceComparer
.
Instance
)
;
foreach
(
var
item
in
userObjects
)
{
if
(
!
item
.
Stored
)
{
if
(
!
CheckSerializable
(
item
.
Instance
)
)
{
continue
;
}
var
clrO
=
wrappers
[
item
.
Instance
]
.
First
(
)
;
foreach
(
var
@ref
in
item
.
PyRefs
)
{
internalStores
.
Add
(
@ref
,
clrO
)
;
}
}
}
return
new
(
)
{
InternalStores
=
internalStores
,
Extensions
=
extensionObjs
,
Wrappers
=
wrapperStorage
,
Contexts
=
contexts
,
}
;
}
private
static
void
RestoreRuntimeDataObjects
(
SharedObjectsState
storage
)
{
var
extensions
=
storage
.
Extensions
;
var
internalStores
=
storage
.
InternalStores
;
var
contexts
=
storage
.
Contexts
;
foreach
(
var
extension
in
extensions
)
{
contexts
.
TryGetValue
(
extension
.
Key
,
out
var
context
)
;
extension
.
Value
.
Load
(
extension
.
Key
,
context
)
;
}
foreach
(
var
clrObj
in
internalStores
)
{
clrObj
.
Value
.
Load
(
clrObj
.
Key
,
null
)
;
}
if
(
WrappersStorer
!=
null
)
{
var
wrapperStorage
=
storage
.
Wrappers
;
var
handle2Obj
=
WrappersStorer
.
Restore
(
wrapperStorage
)
;
foreach
(
var
item
in
handle2Obj
)
{
object
obj
=
item
.
Instance
;
foreach
(
var
pyRef
in
item
.
PyRefs
??
new
List
<
PyObject
>
(
)
)
{
var
context
=
contexts
[
pyRef
]
;
CLRObject
.
Restore
(
obj
,
pyRef
,
context
)
;
}
}
}
}
internal
static
IFormatter
CreateFormatter
(
)
{
return
FormatterType
!=
null
?
(
IFormatter
)
Activator
.
CreateInstance
(
FormatterType
)
:
new
BinaryFormatter
(
)
;
}
}
}
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