void*
MapAlignedPages(size_t size, size_t alignment)
{
MOZ_ASSERT(size >= alignment);
MOZ_ASSERT(size % alignment == 0);
MOZ_ASSERT(size % pageSize == 0);
MOZ_ASSERT(alignment % allocGranularity == 0);
void* p = MapMemory(size);
/* Special case: If we want page alignment, no further work is needed. */
if (alignment == allocGranularity)
return p;
if (OffsetFromAligned(p, alignment) == 0)
return p;
void* retainedAddr;
GetNewChunk(&p, &retainedAddr, size, alignment);
if (retainedAddr)
UnmapPages(retainedAddr, size);
if (p) {
if (OffsetFromAligned(p, alignment) == 0)
return p;
UnmapPages(p, size);
}
p = MapAlignedPagesSlow(size, alignment);
if (!p)
return MapAlignedPagesLastDitch(size, alignment);
MOZ_ASSERT(OffsetFromAligned(p, alignment) == 0);
return p;
}
void*
TestMapAlignedPagesLastDitch(size_t size, size_t alignment)
{
return MapAlignedPagesLastDitch(size, alignment);
}