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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#ifndef SHARE_VM_MEMORY_GENERATIONSPEC_HPP
#define SHARE_VM_MEMORY_GENERATIONSPEC_HPP
#include "memory/generation.hpp"
#include "memory/permGen.hpp"
// The specification of a generation. This class also encapsulates
// some generation-specific behavior. This is done here rather than as a
// virtual function of Generation because these methods are needed in
// initialization of the Generations.
class GenerationSpec : public CHeapObj<mtGC> {
friend class VMStructs;
private:
Generation::Name _name;
size_t _init_size;
size_t _max_size;
public:
GenerationSpec(Generation::Name name, size_t init_size, size_t max_size) {
_name = name;
_init_size = init_size;
_max_size = max_size;
}
Generation* init(ReservedSpace rs, int level, GenRemSet* remset);
// Accessors
Generation::Name name() const { return _name; }
size_t init_size() const { return _init_size; }
void set_init_size(size_t size) { _init_size = size; }
size_t max_size() const { return _max_size; }
void set_max_size(size_t size) { _max_size = size; }
// Alignment
void align(size_t alignment) {
set_init_size(align_size_up(init_size(), alignment));
set_max_size(align_size_up(max_size(), alignment));
}
// Return the number of regions contained in the generation which
// might need to be independently covered by a remembered set.
virtual int n_covered_regions() const { return 1; }
};
typedef GenerationSpec* GenerationSpecPtr;
// The specification of a permanent generation. This class is very
// similar to GenerationSpec in use. Due to PermGen's not being a
// true Generation, we cannot combine the spec classes either.
class PermanentGenerationSpec : public CHeapObj<mtGC> {
friend class VMStructs;
private:
PermGen::Name _name;
size_t _init_size;
size_t _max_size;
size_t _read_only_size;
size_t _read_write_size;
size_t _misc_data_size;
size_t _misc_code_size;
bool _enable_shared_spaces;
enum {
_n_spaces = 2
};
public:
PermanentGenerationSpec(PermGen::Name name, size_t init_size,
size_t max_size, size_t read_only_size,
size_t read_write_size, size_t misc_data_size,
size_t misc_code_size);
PermGen* init(ReservedSpace rs, size_t init_size, GenRemSet* remset);
void disable_sharing() {
_enable_shared_spaces = false;
_read_only_size = 0;
_read_write_size = 0;
_misc_data_size = 0;
_misc_code_size = 0;
}
// Accessors
PermGen::Name name() const { return _name; }
size_t init_size() const { return _init_size; }
void set_init_size(size_t size) { _init_size = size; }
// Max size for user DOES NOT include shared spaces.
// Max size for space allocation DOES include shared spaces.
size_t max_size() const {
return _max_size + _read_only_size + _read_write_size;
}
// Need one covered region for the main space, and one for the shared
// spaces (together).
int n_covered_regions() const { return 2; }
void align(size_t alignment);
size_t read_only_size() const { return _read_only_size; }
size_t read_write_size() const { return _read_write_size; }
size_t misc_data_size() const { return _misc_data_size; }
size_t misc_code_size() const { return _misc_code_size; }
bool enable_shared_spaces() const { return _enable_shared_spaces; }
};
#endif // SHARE_VM_MEMORY_GENERATIONSPEC_HPP