-/* Copyright (c) 2014-2017. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2014-2021. The SimGrid Team. All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#ifndef SIMGRID_MC_MMU_HPP
#define SIMGRID_MC_MMU_HPP
-#include "xbt/misc.h" // xbt_pagesize...
+#include <cstdint>
+#include <utility>
+
+#ifndef XBT_ALWAYS_INLINE
+#define XBT_ALWAYS_INLINE inline __attribute__((always_inline))
+#endif
+
+/** Size of a memory page for the current system. */
+extern "C" int xbt_pagesize;
+/** Number of bits of addresses inside a given page, log2(xbt_pagesize). */
+extern "C" int xbt_pagebits;
namespace simgrid {
namespace mc {
// TODO, do not depend on xbt_pagesize/xbt_pagebits but our own chunk size
namespace mmu {
-static int chunkSize()
+static int chunk_size()
{
return xbt_pagesize;
}
* @param size Byte size
* @return Number of memory pages
*/
-static XBT_ALWAYS_INLINE std::size_t chunkCount(std::size_t size)
+static XBT_ALWAYS_INLINE std::size_t chunk_count(std::size_t size)
{
- size_t page_count = size >> xbt_pagebits;
- if (size & (xbt_pagesize-1))
- page_count ++;
+ std::size_t page_count = size >> xbt_pagebits;
+ if (size & (xbt_pagesize - 1))
+ page_count++;
return page_count;
}
/** @brief Split into chunk number and remaining offset */
static XBT_ALWAYS_INLINE std::pair<std::size_t, std::uintptr_t> split(std::uintptr_t offset)
{
- return {
- offset >> xbt_pagebits,
- offset & (xbt_pagesize-1)
- };
+ return {offset >> xbt_pagebits, offset & (xbt_pagesize - 1)};
}
-/** Merge chunk number and remaining offset info a global offset */
+/** Merge chunk number and remaining offset into a global offset */
static XBT_ALWAYS_INLINE std::uintptr_t join(std::size_t page, std::uintptr_t offset)
{
- return ((std::uintptr_t) page << xbt_pagebits) + offset;
+ return ((std::uintptr_t)page << xbt_pagebits) + offset;
}
static XBT_ALWAYS_INLINE std::uintptr_t join(std::pair<std::size_t, std::uintptr_t> value)
return join(value.first, value.second);
}
-static XBT_ALWAYS_INLINE bool sameChunk(std::uintptr_t a, std::uintptr_t b)
+static XBT_ALWAYS_INLINE bool same_chunk(std::uintptr_t a, std::uintptr_t b)
{
return (a >> xbt_pagebits) == (b >> xbt_pagebits);
}
-
}
}
}