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https://github.com/Ryujinx/Ryujinx.git
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* Remove usage of Mono.Posix.NETStandard in Ryujinx project * Remove usage of Mono.Posix.NETStandard in ARMeilleure project * Remove usage of Mono.Posix.NETStandard in Ryujinx.Memory project * Address gdkchan's comments
128 lines
3.9 KiB
C#
128 lines
3.9 KiB
C#
using System;
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using System.Runtime.InteropServices;
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namespace Ryujinx.Memory
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{
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public static class MemoryManagerUnixHelper
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{
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[Flags]
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public enum MmapProts : uint
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{
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PROT_NONE = 0,
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PROT_READ = 1,
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PROT_WRITE = 2,
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PROT_EXEC = 4
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}
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[Flags]
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public enum MmapFlags : uint
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{
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MAP_SHARED = 1,
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MAP_PRIVATE = 2,
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MAP_ANONYMOUS = 4,
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MAP_NORESERVE = 8,
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MAP_UNLOCKED = 16
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}
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private const int MAP_ANONYMOUS_LINUX_GENERIC = 0x20;
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private const int MAP_NORESERVE_LINUX_GENERIC = 0x4000;
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private const int MAP_UNLOCKED_LINUX_GENERIC = 0x80000;
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private const int MAP_NORESERVE_DARWIN = 0x40;
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private const int MAP_JIT_DARWIN = 0x800;
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private const int MAP_ANONYMOUS_DARWIN = 0x1000;
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public const int MADV_DONTNEED = 4;
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public const int MADV_REMOVE = 9;
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[DllImport("libc", EntryPoint = "mmap", SetLastError = true)]
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private static extern IntPtr Internal_mmap(IntPtr address, ulong length, MmapProts prot, int flags, int fd, long offset);
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[DllImport("libc", SetLastError = true)]
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public static extern int mprotect(IntPtr address, ulong length, MmapProts prot);
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[DllImport("libc", SetLastError = true)]
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public static extern int munmap(IntPtr address, ulong length);
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[DllImport("libc", SetLastError = true)]
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public static extern IntPtr mremap(IntPtr old_address, ulong old_size, ulong new_size, int flags, IntPtr new_address);
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[DllImport("libc", SetLastError = true)]
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public static extern int madvise(IntPtr address, ulong size, int advice);
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private static int MmapFlagsToSystemFlags(MmapFlags flags)
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{
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int result = 0;
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if (flags.HasFlag(MmapFlags.MAP_SHARED))
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{
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result |= (int)MmapFlags.MAP_SHARED;
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}
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if (flags.HasFlag(MmapFlags.MAP_PRIVATE))
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{
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result |= (int)MmapFlags.MAP_PRIVATE;
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}
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if (flags.HasFlag(MmapFlags.MAP_ANONYMOUS))
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{
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if (OperatingSystem.IsLinux())
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{
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result |= MAP_ANONYMOUS_LINUX_GENERIC;
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}
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else if (OperatingSystem.IsMacOS())
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{
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result |= MAP_ANONYMOUS_DARWIN;
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}
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else
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{
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throw new NotImplementedException();
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}
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}
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if (flags.HasFlag(MmapFlags.MAP_NORESERVE))
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{
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if (OperatingSystem.IsLinux())
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{
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result |= MAP_NORESERVE_LINUX_GENERIC;
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}
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else if (OperatingSystem.IsMacOS())
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{
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result |= MAP_NORESERVE_DARWIN;
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}
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else
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{
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throw new NotImplementedException();
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}
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}
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if (flags.HasFlag(MmapFlags.MAP_UNLOCKED))
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{
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if (OperatingSystem.IsLinux())
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{
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result |= MAP_UNLOCKED_LINUX_GENERIC;
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}
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else if (OperatingSystem.IsMacOS())
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{
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// FIXME: Doesn't exist on Darwin
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}
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else
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{
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throw new NotImplementedException();
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}
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}
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if (OperatingSystem.IsMacOSVersionAtLeast(10, 14))
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{
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result |= MAP_JIT_DARWIN;
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}
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return result;
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}
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public static IntPtr mmap(IntPtr address, ulong length, MmapProts prot, MmapFlags flags, int fd, long offset)
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{
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return Internal_mmap(address, length, prot, MmapFlagsToSystemFlags(flags), fd, offset);
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}
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}
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} |