/* -*- 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. void 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 MakePagesReadOnly(void* p, size_t size); void UnprotectPages(void* p, size_t size); } // namespace gc } // namespace js #endif /* gc_Memory_h */