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typedef unsigned char FlagByte;
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typedef unsigned char FlagByte;
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const FlagByte REMOVE_WHEN_UNUSED = 0x01;
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const FlagByte REMOVE_WHEN_UNUSED = 0x01;
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const FlagByte STATIC_RESOURCE = 0x02;
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const FlagByte STATIC_RESOURCE = 0x02;
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/** This class template represents a resource record. There is a pointer to
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/** \brief This class template represents a resource record.
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There is a pointer to
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the actual resource (of type RES) and a usage counter which should never
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the actual resource (of type RES) and a usage counter which should never
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be less than 0. */
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be less than 0. */
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template<class RES>
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template<class RES>
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class ResourceRecord
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class ResourceRecord
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{
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{
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112 |
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template<class RES> class ResourceManager;
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template<class RES> class ResourceManager;
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115 |
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/** \brief Template for a pointer to a reference counted resource.
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117 |
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/** The ResourcePtr class template is a template for a reference
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The ResourcePtr class template is a template for a reference
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counted resource pointer. It is a smart pointer that actually points
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counted resource pointer. It is a smart pointer that actually points
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to a ResourceRecord and not to the actual resource. Since the record
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to a ResourceRecord and not to the actual resource. Since the record
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contains a reference count, we can increase the reference count when
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121 |
contains a reference count, we can increase the reference count when
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the pointer is copied and decrease it in the destructor. Only the
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the pointer is copied and decrease it in the destructor. Only the
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ResourceManager can create ResourcePtr's directly from a raw
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ResourceManager can create ResourcePtr's directly from a raw
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| 218 |
flag is set, the resource record is removed from the manager */
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flag is set, the resource record is removed from the manager */
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void remove_when_unused() { rr->remove_when_unused(); }
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223 |
void remove_when_unused() { rr->remove_when_unused(); }
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};
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};
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/** \brief Resource manager class.
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/** The ResourceManager is a singleton, and it uses Scott Meyers construct
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The ResourceManager is a singleton, and it uses Scott Meyers construct
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on first use idiom, i.e. the static function get_instance() will
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230 |
on first use idiom, i.e. the static function get_instance() will
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| 225 |
construct it when first called. There may be a problem with this
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231 |
construct it when first called. There may be a problem with this
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idion if resources depend on each other. However, that is only
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232 |
idion if resources depend on each other. However, that is only
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when the program shuts down. See modern C++ design by
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233 |
when the program shuts down. See modern C++ design by
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| 228 |
Alexandrescu for more information.
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234 |
Alexandrescu for more information.
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