/
shenandoahAllocRequest.hpp
159 lines (140 loc) · 4.22 KB
/
shenandoahAllocRequest.hpp
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/*
* Copyright (c) 2018, 2019, Red Hat, Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#ifndef SHARE_GC_SHENANDOAH_SHENANDOAHALLOCREQUEST_HPP
#define SHARE_GC_SHENANDOAH_SHENANDOAHALLOCREQUEST_HPP
#include "memory/allocation.hpp"
class ShenandoahAllocRequest : StackObj {
public:
enum Type {
_alloc_shared, // Allocate common, outside of TLAB
_alloc_shared_gc, // Allocate common, outside of GCLAB
_alloc_tlab, // Allocate TLAB
_alloc_gclab, // Allocate GCLAB
_ALLOC_LIMIT
};
static const char* alloc_type_to_string(Type type) {
switch (type) {
case _alloc_shared:
return "Shared";
case _alloc_shared_gc:
return "Shared GC";
case _alloc_tlab:
return "TLAB";
case _alloc_gclab:
return "GCLAB";
default:
ShouldNotReachHere();
return "";
}
}
private:
size_t _min_size;
size_t _requested_size;
size_t _actual_size;
Type _alloc_type;
#ifdef ASSERT
bool _actual_size_set;
#endif
ShenandoahAllocRequest(size_t _min_size, size_t _requested_size, Type _alloc_type) :
_min_size(_min_size), _requested_size(_requested_size),
_actual_size(0), _alloc_type(_alloc_type)
#ifdef ASSERT
, _actual_size_set(false)
#endif
{}
public:
static inline ShenandoahAllocRequest for_tlab(size_t min_size, size_t requested_size) {
return ShenandoahAllocRequest(min_size, requested_size, _alloc_tlab);
}
static inline ShenandoahAllocRequest for_gclab(size_t min_size, size_t requested_size) {
return ShenandoahAllocRequest(min_size, requested_size, _alloc_gclab);
}
static inline ShenandoahAllocRequest for_shared_gc(size_t requested_size) {
return ShenandoahAllocRequest(0, requested_size, _alloc_shared_gc);
}
static inline ShenandoahAllocRequest for_shared(size_t requested_size) {
return ShenandoahAllocRequest(0, requested_size, _alloc_shared);
}
inline size_t size() {
return _requested_size;
}
inline Type type() {
return _alloc_type;
}
inline size_t min_size() {
assert (is_lab_alloc(), "Only access for LAB allocs");
return _min_size;
}
inline size_t actual_size() {
assert (_actual_size_set, "Should be set");
return _actual_size;
}
inline void set_actual_size(size_t v) {
#ifdef ASSERT
assert (!_actual_size_set, "Should not be set");
_actual_size_set = true;
#endif
_actual_size = v;
}
inline bool is_mutator_alloc() {
switch (_alloc_type) {
case _alloc_tlab:
case _alloc_shared:
return true;
case _alloc_gclab:
case _alloc_shared_gc:
return false;
default:
ShouldNotReachHere();
return false;
}
}
inline bool is_gc_alloc() {
switch (_alloc_type) {
case _alloc_tlab:
case _alloc_shared:
return false;
case _alloc_gclab:
case _alloc_shared_gc:
return true;
default:
ShouldNotReachHere();
return false;
}
}
inline bool is_lab_alloc() {
switch (_alloc_type) {
case _alloc_tlab:
case _alloc_gclab:
return true;
case _alloc_shared:
case _alloc_shared_gc:
return false;
default:
ShouldNotReachHere();
return false;
}
}
};
#endif // SHARE_GC_SHENANDOAH_SHENANDOAHALLOCREQUEST_HPP