public static void Free4KbAlignedMemory(byte *ptr, long size, Sparrow.Utils.NativeMemory.ThreadStats stats)
{
Debug.Assert(ptr != null);
if (stats != null)
{
Sparrow.Utils.NativeMemory.UpdateMemoryStatsForThread(stats, size);
}
Interlocked.Add(ref Sparrow.Utils.NativeMemory._totalAllocatedMemory, -size);
if (PlatformDetails.RunningOnPosix)
{
var result = Syscall.munmap((IntPtr)ptr, (UIntPtr)(uint)size);
if (result == -1)
{
var err = Marshal.GetLastWin32Error();
Syscall.ThrowLastError(err, "Failed to munmap ");
}
return;
}
if (Win32MemoryProtectMethods.VirtualFree(ptr, UIntPtr.Zero, Win32MemoryProtectMethods.FreeType.MEM_RELEASE) == false)
{
ThrowFailedToFree();
}
}
public static byte *Allocate4KbAlignedMemory(long size, out Sparrow.Utils.NativeMemory.ThreadStats thread)
{
Debug.Assert(size >= 0);
thread = Sparrow.Utils.NativeMemory.ThreadAllocations.Value;
thread.Allocations += size;
Interlocked.Add(ref Sparrow.Utils.NativeMemory._totalAllocatedMemory, size);
if (PlatformDetails.RunningOnPosix)
{
byte *ptr;
var rc = Syscall.posix_memalign(&ptr, (IntPtr)4096, (IntPtr)size);
if (rc != 0)
{
Syscall.ThrowLastError(rc, "Could not allocate memory");
}
return(ptr);
}
var allocate4KbAllignedMemory = Win32MemoryProtectMethods.VirtualAlloc(null, (UIntPtr)size, Win32MemoryProtectMethods.AllocationType.COMMIT,
Win32MemoryProtectMethods.MemoryProtection.READWRITE);
if (allocate4KbAllignedMemory == null)
{
ThrowFailedToAllocate();
}
return(allocate4KbAllignedMemory);
}
public static void Free4KbAlignedMemory(byte *ptr, int size, Sparrow.Utils.NativeMemory.ThreadStats stats)
{
Debug.Assert(ptr != null);
var currentThreadValue = Sparrow.Utils.NativeMemory.ThreadAllocations.Value;
if (currentThreadValue == stats)
{
currentThreadValue.Allocations -= size;
Sparrow.Utils.NativeMemory.FixupReleasesFromOtherThreads(currentThreadValue);
}
else
{
Interlocked.Add(ref stats.ReleasesFromOtherThreads, size);
}
Interlocked.Add(ref Sparrow.Utils.NativeMemory._totalAllocatedMemory, -size);
var p = new IntPtr(ptr);
if (PlatformDetails.RunningOnPosix)
{
Syscall.free(p);
return;
}
if (Win32MemoryProtectMethods.VirtualFree(ptr, UIntPtr.Zero, Win32MemoryProtectMethods.FreeType.MEM_RELEASE) == false)
{
ThrowFailedToFree();
}
}
public static byte *Allocate4KbAlignedMemory(long size, out Sparrow.Utils.NativeMemory.ThreadStats thread)
{
Debug.Assert(size >= 0);
thread = Sparrow.Utils.NativeMemory.ThreadAllocations.Value;
thread.Allocations += size;
Interlocked.Add(ref Sparrow.Utils.NativeMemory._totalAllocatedMemory, size);
if (PlatformDetails.RunningOnPosix)
{
// we pass NULL (IntPtr.Zero) as the first parameter (address / start) so the kernel chooses the(page-aligned) address at which to create the mapping
var pageAlignedMemory = Syscall.mmap64(IntPtr.Zero, (UIntPtr)size, MmapProts.PROT_READ | MmapProts.PROT_WRITE,
MmapFlags.MAP_PRIVATE | MmapFlags.MAP_ANONYMOUS, -1, 0L);
if (pageAlignedMemory.ToInt64() == -1)
{
var err = Marshal.GetLastWin32Error();
Syscall.ThrowLastError(err,
$"Could not allocate memory (allocation size: {size / Constants.Size.Kilobyte:#,#0} kb)");
}
return((byte *)pageAlignedMemory);
}
var allocate4KbAlignedMemory = Win32MemoryProtectMethods.VirtualAlloc(null, (UIntPtr)size, Win32MemoryProtectMethods.AllocationType.COMMIT,
Win32MemoryProtectMethods.MemoryProtection.READWRITE);
if (allocate4KbAlignedMemory == null)
{
ThrowFailedToAllocate();
}
return(allocate4KbAlignedMemory);
}
public static void Free4KbAlignedMemory(byte *ptr, long size, Sparrow.Utils.NativeMemory.ThreadStats stats)
{
Debug.Assert(ptr != null);
if (stats != null)
{
Sparrow.Utils.NativeMemory.UpdateMemoryStatsForThread(stats, size);
}
Interlocked.Add(ref Sparrow.Utils.NativeMemory._totalAllocatedMemory, -size);
var p = new IntPtr(ptr);
if (PlatformDetails.RunningOnPosix)
{
Syscall.free(p);
return;
}
if (Win32MemoryProtectMethods.VirtualFree(ptr, UIntPtr.Zero, Win32MemoryProtectMethods.FreeType.MEM_RELEASE) == false)
{
ThrowFailedToFree();
}
}
