| /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
| * vim: set ts=8 sts=4 et sw=4 tw=99: |
| * This Source Code Form is subject to the terms of the Mozilla Public |
| * License, v. 2.0. If a copy of the MPL was not distributed with this |
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| |
| #ifndef gc_Memory_h |
| #define gc_Memory_h |
| |
| #include <stddef.h> |
| |
| namespace js { |
| namespace gc { |
| |
| // Sanity check that our compiled configuration matches the currently |
| // running instance and initialize any runtime data needed for allocation. |
| void InitMemorySubsystem(); |
| |
| size_t SystemPageSize(); |
| |
| // Allocate or deallocate pages from the system with the given alignment. |
| void* MapAlignedPages(size_t size, size_t alignment); |
| void UnmapPages(void* p, size_t size); |
| |
| // Tell the OS that the given pages are not in use, so they should not be |
| // written to a paging file. This may be a no-op on some platforms. |
| bool MarkPagesUnused(void* p, size_t size); |
| |
| // Undo |MarkPagesUnused|: tell the OS that the given pages are of interest |
| // and should be paged in and out normally. This may be a no-op on some |
| // platforms. |
| bool MarkPagesInUse(void* p, size_t size); |
| |
| // Returns #(hard faults) + #(soft faults) |
| size_t GetPageFaultCount(); |
| |
| // Allocate memory mapped content. |
| // The offset must be aligned according to alignment requirement. |
| void* AllocateMappedContent(int fd, size_t offset, size_t length, size_t alignment); |
| |
| // Deallocate memory mapped content. |
| void DeallocateMappedContent(void* p, size_t length); |
| |
| void* TestMapAlignedPagesLastDitch(size_t size, size_t alignment); |
| |
| void ProtectPages(void* p, size_t size); |
| void UnprotectPages(void* p, size_t size); |
| |
| } // namespace gc |
| } // namespace js |
| |
| #endif /* gc_Memory_h */ |
