Quelle  genMemoryPools.cpp

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#include "precompiled.hpp"
#include "gc/shared/generation.hpp"
#include "gc/shared/genMemoryPools.hpp"
#include "gc/shared/space.hpp"
#if INCLUDE_SERIALGC
#include "gc/serial/defNewGeneration.hpp"
#endif

ContiguousSpacePool::ContiguousSpacePool(ContiguousSpace* space,
                                         const char* name,
                                         size_t max_size,
                                         bool support_usage_threshold) :
  CollectedMemoryPool(name, space->capacity(), max_size,
                      support_usage_threshold), _space(space) {
}

size_t ContiguousSpacePool::used_in_bytes() {
  return space()->used();
}

MemoryUsage ContiguousSpacePool::get_memory_usage() {
  size_t maxSize   = (available_for_allocation() ? max_size() : 0);
  size_t used      = used_in_bytes();
  size_t committed = _space->capacity();

  return MemoryUsage(initial_size(), used, committed, maxSize);
}

#if INCLUDE_SERIALGC

SurvivorContiguousSpacePool::SurvivorContiguousSpacePool(DefNewGeneration* young_gen,
                                                         const char* name,
                                                         size_t max_size,
                                                         bool support_usage_threshold) :
  CollectedMemoryPool(name, young_gen->from()->capacity(), max_size,
                      support_usage_threshold), _young_gen(young_gen) {
}

size_t SurvivorContiguousSpacePool::used_in_bytes() {
  return _young_gen->from()->used();
}

size_t SurvivorContiguousSpacePool::committed_in_bytes() {
  return _young_gen->from()->capacity();
}

MemoryUsage SurvivorContiguousSpacePool::get_memory_usage() {
  size_t maxSize = (available_for_allocation() ? max_size() : 0);
  size_t used    = used_in_bytes();
  size_t committed = committed_in_bytes();

  return MemoryUsage(initial_size(), used, committed, maxSize);
}

#endif // INCLUDE_SERIALGC

GenerationPool::GenerationPool(Generation* gen,
                               const char* name,
                               bool support_usage_threshold) :
  CollectedMemoryPool(name, gen->capacity(), gen->max_capacity(),
                      support_usage_threshold), _gen(gen) {
}

size_t GenerationPool::used_in_bytes() {
  return _gen->used();
}

MemoryUsage GenerationPool::get_memory_usage() {
  size_t used      = used_in_bytes();
  size_t committed = _gen->capacity();
  size_t maxSize   = (available_for_allocation() ? max_size() : 0);

  return MemoryUsage(initial_size(), used, committed, maxSize);
}