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comparison: js/src/gc/Memory.h
js/src/gc/Memory.h
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef gc_Memory_h | |
| 8 #define gc_Memory_h | |
| 9 | |
| 10 #include <stddef.h> | |
| 11 | |
| 12 struct JSRuntime; | |
| 13 | |
| 14 namespace js { | |
| 15 namespace gc { | |
| 16 | |
| 17 // Sanity check that our compiled configuration matches the currently running | |
| 18 // instance and initialize any runtime data needed for allocation. | |
| 19 void | |
| 20 InitMemorySubsystem(JSRuntime *rt); | |
| 21 | |
| 22 // Allocate or deallocate pages from the system with the given alignment. | |
| 23 void * | |
| 24 MapAlignedPages(JSRuntime *rt, size_t size, size_t alignment); | |
| 25 | |
| 26 void | |
| 27 UnmapPages(JSRuntime *rt, void *p, size_t size); | |
| 28 | |
| 29 // Tell the OS that the given pages are not in use, so they should not | |
| 30 // be written to a paging file. This may be a no-op on some platforms. | |
| 31 bool | |
| 32 MarkPagesUnused(JSRuntime *rt, void *p, size_t size); | |
| 33 | |
| 34 // Undo |MarkPagesUnused|: tell the OS that the given pages are of interest | |
| 35 // and should be paged in and out normally. This may be a no-op on some | |
| 36 // platforms. | |
| 37 bool | |
| 38 MarkPagesInUse(JSRuntime *rt, void *p, size_t size); | |
| 39 | |
| 40 // Returns #(hard faults) + #(soft faults) | |
| 41 size_t | |
| 42 GetPageFaultCount(); | |
| 43 | |
| 44 // Allocate memory mapped content. | |
| 45 // The offset must be aligned according to alignment requirement. | |
| 46 void * | |
| 47 AllocateMappedContent(int fd, size_t offset, size_t length, size_t alignment); | |
| 48 | |
| 49 // Deallocate memory mapped content. | |
| 50 void | |
| 51 DeallocateMappedContent(void *p, size_t length); | |
| 52 | |
| 53 } // namespace gc | |
| 54 } // namespace js | |
| 55 | |
| 56 #endif /* gc_Memory_h */ |
