1 /*
2 * Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
399 // a GC is induced and the value is increased. Size is in bytes.
400 static volatile intptr_t _capacity_until_GC;
401
402 // For a CMS collection, signal that a concurrent collection should
403 // be started.
404 static bool _should_concurrent_collect;
405
406 static uint _shrink_factor;
407
408 static size_t shrink_factor() { return _shrink_factor; }
409 void set_shrink_factor(uint v) { _shrink_factor = v; }
410
411 public:
412
413 static void initialize();
414 static void post_initialize();
415
416 static size_t capacity_until_GC();
417 static bool inc_capacity_until_GC(size_t v,
418 size_t* new_cap_until_GC = NULL,
419 size_t* old_cap_until_GC = NULL);
420 static size_t dec_capacity_until_GC(size_t v);
421
422 static bool should_concurrent_collect() { return _should_concurrent_collect; }
423 static void set_should_concurrent_collect(bool v) {
424 _should_concurrent_collect = v;
425 }
426
427 // The amount to increase the high-water-mark (_capacity_until_GC)
428 static size_t delta_capacity_until_GC(size_t bytes);
429
430 // Tells if we have can expand metaspace without hitting set limits.
431 static bool can_expand(size_t words, bool is_class);
432
433 // Returns amount that we can expand without hitting a GC,
434 // measured in words.
435 static size_t allowed_expansion();
436
437 // Calculate the new high-water mark at which to induce
438 // a GC.
439 static void compute_new_size();
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1 /*
2 * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
399 // a GC is induced and the value is increased. Size is in bytes.
400 static volatile intptr_t _capacity_until_GC;
401
402 // For a CMS collection, signal that a concurrent collection should
403 // be started.
404 static bool _should_concurrent_collect;
405
406 static uint _shrink_factor;
407
408 static size_t shrink_factor() { return _shrink_factor; }
409 void set_shrink_factor(uint v) { _shrink_factor = v; }
410
411 public:
412
413 static void initialize();
414 static void post_initialize();
415
416 static size_t capacity_until_GC();
417 static bool inc_capacity_until_GC(size_t v,
418 size_t* new_cap_until_GC = NULL,
419 size_t* old_cap_until_GC = NULL,
420 bool* can_retry = NULL);
421 static size_t dec_capacity_until_GC(size_t v);
422
423 static bool should_concurrent_collect() { return _should_concurrent_collect; }
424 static void set_should_concurrent_collect(bool v) {
425 _should_concurrent_collect = v;
426 }
427
428 // The amount to increase the high-water-mark (_capacity_until_GC)
429 static size_t delta_capacity_until_GC(size_t bytes);
430
431 // Tells if we have can expand metaspace without hitting set limits.
432 static bool can_expand(size_t words, bool is_class);
433
434 // Returns amount that we can expand without hitting a GC,
435 // measured in words.
436 static size_t allowed_expansion();
437
438 // Calculate the new high-water mark at which to induce
439 // a GC.
440 static void compute_new_size();
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