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| virtual | ~Data_descriptor () |
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| virtual void | default_type (Datatype_template_ptr type)=0 |
| | Set the datatype template used to type raw pointers shared through this descriptor.
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| virtual Datatype_template_ptr | default_type ()=0 |
| | Access the datatype template used to type raw pointers shared through this descriptor.
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| virtual bool | metadata () const =0 |
| | Return true if the data is a metadata.
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| |
| virtual void | metadata (bool metadata)=0 |
| | Sets whether this describes a metadata or not.
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| virtual const std::string & | name () const =0 |
| | Access the name of the descriptor.
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| virtual Ref | ref ()=0 |
| | Return a reference to the value of the data behind this descriptor.
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| virtual bool | empty ()=0 |
| | Checks whether this descriptor is empty (contains no reference)
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| virtual void | share (void *data, bool read, bool write)=0 |
| | Shares some data with PDI.
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| virtual void * | share (Ref ref, bool read, bool write)=0 |
| | Shares some data with PDI.
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| virtual void | release ()=0 |
| | Releases ownership of a data shared with PDI.
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| virtual void * | reclaim ()=0 |
| | Reclaims ownership of a data buffer shared with PDI.
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◆ ~Data_descriptor()
| virtual PDI::Data_descriptor::~Data_descriptor |
( |
| ) |
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virtual |
◆ default_type() [1/2]
Set the datatype template used to type raw pointers shared through this descriptor.
- Parameters
-
| type | the datatype template attached to the descriptor |
◆ default_type() [2/2]
Access the datatype template used to type raw pointers shared through this descriptor.
- Returns
- the datatype template attached to the descriptor
◆ metadata() [1/2]
| virtual bool PDI::Data_descriptor::metadata |
( |
| ) |
const |
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pure virtual |
Return true if the data is a metadata.
◆ metadata() [2/2]
| virtual void PDI::Data_descriptor::metadata |
( |
bool |
metadata | ) |
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|
pure virtual |
Sets whether this describes a metadata or not.
- Parameters
-
| metadata | whether data shared through this descriptor should behave as a metadata |
◆ name()
| virtual const std::string & PDI::Data_descriptor::name |
( |
| ) |
const |
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pure virtual |
Access the name of the descriptor.
◆ ref()
| virtual Ref PDI::Data_descriptor::ref |
( |
| ) |
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pure virtual |
Return a reference to the value of the data behind this descriptor.
◆ empty()
| virtual bool PDI::Data_descriptor::empty |
( |
| ) |
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|
pure virtual |
Checks whether this descriptor is empty (contains no reference)
- Returns
- true if empty.
◆ share() [1/2]
| virtual void PDI::Data_descriptor::share |
( |
void * |
data, |
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|
bool |
read, |
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|
bool |
write |
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) |
| |
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pure virtual |
Shares some data with PDI.
- Parameters
-
| [in,out] | data | the shared data |
| read | whether read access is granted to other references |
| write | whether write access is granted to other references |
◆ share() [2/2]
| virtual void * PDI::Data_descriptor::share |
( |
Ref |
ref, |
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|
bool |
read, |
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|
bool |
write |
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) |
| |
|
pure virtual |
Shares some data with PDI.
- Parameters
-
| [in,out] | ref | a reference to the shared data |
| read | whether the stored reference should have read access |
| write | whether the stored reference should have write access |
- Returns
- the just shared buffer
◆ release()
| virtual void PDI::Data_descriptor::release |
( |
| ) |
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|
pure virtual |
Releases ownership of a data shared with PDI.
PDI is then responsible to free the associated memory whenever necessary.
◆ reclaim()
| virtual void * PDI::Data_descriptor::reclaim |
( |
| ) |
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pure virtual |
Reclaims ownership of a data buffer shared with PDI.
PDI does not manage the buffer memory anymore.
- Returns
- the address of the buffer
The documentation for this class was generated from the following file:
