1 files changed, 53 insertions, 0 deletions
diff --git a/js/src/gc/Memory.h b/js/src/gc/Memory.h
new file mode 100644
index 000000000..4ff7bff4c
--- /dev/null
+++ b/js/src/gc/Memory.h
@@ -0,0 +1,53 @@
+/* -*- 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 */