//! C definitions used by libnative that don't belong in liblibc

#![allow(nonstandard_style)]
#![cfg_attr(test, allow(dead_code))]
#![unstable(issue = "0", feature = "windows_c")]

use crate::os::raw::{c_int, c_uint, c_ulong, c_long, c_longlong, c_ushort, c_char};
#[cfg(target_arch = "x86_64")]
use crate::os::raw::c_ulonglong;
use crate::ptr;

use libc::{wchar_t, size_t, c_void};

pub use self::FILE_INFO_BY_HANDLE_CLASS::*;
pub use self::EXCEPTION_DISPOSITION::*;

pub type DWORD = c_ulong;
pub type HANDLE = LPVOID;
pub type HINSTANCE = HANDLE;
pub type HMODULE = HINSTANCE;
pub type HRESULT = LONG;
pub type BOOL = c_int;
pub type BYTE = u8;
pub type BOOLEAN = BYTE;
pub type GROUP = c_uint;
pub type LARGE_INTEGER = c_longlong;
pub type LONG = c_long;
pub type UINT = c_uint;
pub type WCHAR = u16;
pub type USHORT = c_ushort;
pub type SIZE_T = usize;
pub type WORD = u16;
pub type CHAR = c_char;
pub type ULONG_PTR = usize;
pub type ULONG = c_ulong;
#[cfg(target_arch = "x86_64")]
pub type ULONGLONG = u64;
#[cfg(target_arch = "x86_64")]
pub type DWORDLONG = ULONGLONG;

pub type LPBOOL = *mut BOOL;
pub type LPBYTE = *mut BYTE;
pub type LPBY_HANDLE_FILE_INFORMATION = *mut BY_HANDLE_FILE_INFORMATION;
pub type LPCSTR = *const CHAR;
pub type LPCVOID = *const c_void;
pub type LPCWSTR = *const WCHAR;
pub type LPDWORD = *mut DWORD;
pub type LPHANDLE = *mut HANDLE;
pub type LPOVERLAPPED = *mut OVERLAPPED;
pub type LPPROCESS_INFORMATION = *mut PROCESS_INFORMATION;
pub type LPSECURITY_ATTRIBUTES = *mut SECURITY_ATTRIBUTES;
pub type LPSTARTUPINFO = *mut STARTUPINFO;
pub type LPVOID = *mut c_void;
pub type LPWCH = *mut WCHAR;
pub type LPWIN32_FIND_DATAW = *mut WIN32_FIND_DATAW;
pub type LPWSADATA = *mut WSADATA;
pub type LPWSAPROTOCOL_INFO = *mut WSAPROTOCOL_INFO;
pub type LPSTR = *mut CHAR;
pub type LPWSTR = *mut WCHAR;
pub type LPFILETIME = *mut FILETIME;
pub type LPWSABUF = *mut WSABUF;
pub type LPWSAOVERLAPPED = *mut c_void;
pub type LPWSAOVERLAPPED_COMPLETION_ROUTINE = *mut c_void;

pub type PCONDITION_VARIABLE = *mut CONDITION_VARIABLE;
pub type PLARGE_INTEGER = *mut c_longlong;
pub type PSRWLOCK = *mut SRWLOCK;

pub type SOCKET = crate::os::windows::raw::SOCKET;
pub type socklen_t = c_int;
pub type ADDRESS_FAMILY = USHORT;

pub const TRUE: BOOL = 1;
pub const FALSE: BOOL = 0;

pub const FILE_ATTRIBUTE_READONLY: DWORD = 0x1;
pub const FILE_ATTRIBUTE_DIRECTORY: DWORD = 0x10;
pub const FILE_ATTRIBUTE_REPARSE_POINT: DWORD = 0x400;

pub const FILE_SHARE_DELETE: DWORD = 0x4;
pub const FILE_SHARE_READ: DWORD = 0x1;
pub const FILE_SHARE_WRITE: DWORD = 0x2;

pub const CREATE_ALWAYS: DWORD = 2;
pub const CREATE_NEW: DWORD = 1;
pub const OPEN_ALWAYS: DWORD = 4;
pub const OPEN_EXISTING: DWORD = 3;
pub const TRUNCATE_EXISTING: DWORD = 5;

pub const FILE_WRITE_DATA: DWORD = 0x00000002;
pub const FILE_APPEND_DATA: DWORD = 0x00000004;
pub const FILE_WRITE_EA: DWORD = 0x00000010;
pub const FILE_WRITE_ATTRIBUTES: DWORD = 0x00000100;
pub const READ_CONTROL: DWORD = 0x00020000;
pub const SYNCHRONIZE: DWORD = 0x00100000;
pub const GENERIC_READ: DWORD = 0x80000000;
pub const GENERIC_WRITE: DWORD = 0x40000000;
pub const STANDARD_RIGHTS_WRITE: DWORD = READ_CONTROL;
pub const FILE_GENERIC_WRITE: DWORD = STANDARD_RIGHTS_WRITE | FILE_WRITE_DATA |
                                      FILE_WRITE_ATTRIBUTES |
                                      FILE_WRITE_EA |
                                      FILE_APPEND_DATA |
                                      SYNCHRONIZE;

pub const FILE_FLAG_OPEN_REPARSE_POINT: DWORD = 0x00200000;
pub const FILE_FLAG_BACKUP_SEMANTICS: DWORD = 0x02000000;
pub const SECURITY_SQOS_PRESENT: DWORD = 0x00100000;

pub const FIONBIO: c_ulong = 0x8004667e;

#[cfg(target_arch = "arm")]
const ARM_MAX_BREAKPOINTS: usize = 8;
#[cfg(target_arch = "arm")]
const ARM_MAX_WATCHPOINTS: usize = 1;

#[repr(C)]
#[derive(Copy)]
pub struct WIN32_FIND_DATAW {
    pub dwFileAttributes: DWORD,
    pub ftCreationTime: FILETIME,
    pub ftLastAccessTime: FILETIME,
    pub ftLastWriteTime: FILETIME,
    pub nFileSizeHigh: DWORD,
    pub nFileSizeLow: DWORD,
    pub dwReserved0: DWORD,
    pub dwReserved1: DWORD,
    pub cFileName: [wchar_t; 260], // #define MAX_PATH 260
    pub cAlternateFileName: [wchar_t; 14],
}
impl Clone for WIN32_FIND_DATAW {
    fn clone(&self) -> Self { *self }
}

pub const WSA_FLAG_OVERLAPPED: DWORD = 0x01;

pub const WSADESCRIPTION_LEN: usize = 256;
pub const WSASYS_STATUS_LEN: usize = 128;
pub const WSAPROTOCOL_LEN: DWORD = 255;
pub const INVALID_SOCKET: SOCKET = !0;

pub const WSAEACCES: c_int = 10013;
pub const WSAEINVAL: c_int = 10022;
pub const WSAEWOULDBLOCK: c_int = 10035;
pub const WSAEADDRINUSE: c_int = 10048;
pub const WSAEADDRNOTAVAIL: c_int = 10049;
pub const WSAECONNABORTED: c_int = 10053;
pub const WSAECONNRESET: c_int = 10054;
pub const WSAENOTCONN: c_int = 10057;
pub const WSAESHUTDOWN: c_int = 10058;
pub const WSAETIMEDOUT: c_int = 10060;
pub const WSAECONNREFUSED: c_int = 10061;

pub const MAX_PROTOCOL_CHAIN: DWORD = 7;

pub const TOKEN_READ: DWORD = 0x20008;
pub const MAXIMUM_REPARSE_DATA_BUFFER_SIZE: usize = 16 * 1024;
pub const FSCTL_GET_REPARSE_POINT: DWORD = 0x900a8;
pub const IO_REPARSE_TAG_SYMLINK: DWORD = 0xa000000c;
pub const IO_REPARSE_TAG_MOUNT_POINT: DWORD = 0xa0000003;
pub const SYMLINK_FLAG_RELATIVE: DWORD = 0x00000001;
pub const FSCTL_SET_REPARSE_POINT: DWORD = 0x900a4;

pub const SYMBOLIC_LINK_FLAG_DIRECTORY: DWORD = 0x1;
pub const SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE: DWORD = 0x2;

// Note that these are not actually HANDLEs, just values to pass to GetStdHandle
pub const STD_INPUT_HANDLE: DWORD = -10i32 as DWORD;
pub const STD_OUTPUT_HANDLE: DWORD = -11i32 as DWORD;
pub const STD_ERROR_HANDLE: DWORD = -12i32 as DWORD;

pub const HANDLE_FLAG_INHERIT: DWORD = 0x00000001;

pub const PROGRESS_CONTINUE: DWORD = 0;

pub const ERROR_FILE_NOT_FOUND: DWORD = 2;
pub const ERROR_PATH_NOT_FOUND: DWORD = 3;
pub const ERROR_ACCESS_DENIED: DWORD = 5;
pub const ERROR_INVALID_HANDLE: DWORD = 6;
pub const ERROR_NO_MORE_FILES: DWORD = 18;
pub const ERROR_HANDLE_EOF: DWORD = 38;
pub const ERROR_FILE_EXISTS: DWORD = 80;
pub const ERROR_INVALID_PARAMETER: DWORD = 87;
pub const ERROR_BROKEN_PIPE: DWORD = 109;
pub const ERROR_CALL_NOT_IMPLEMENTED: DWORD = 120;
pub const ERROR_INSUFFICIENT_BUFFER: DWORD = 122;
pub const ERROR_ALREADY_EXISTS: DWORD = 183;
pub const ERROR_NO_DATA: DWORD = 232;
pub const ERROR_ENVVAR_NOT_FOUND: DWORD = 203;
pub const ERROR_OPERATION_ABORTED: DWORD = 995;
pub const ERROR_IO_PENDING: DWORD = 997;
pub const ERROR_TIMEOUT: DWORD = 0x5B4;

pub const E_NOTIMPL: HRESULT = 0x80004001u32 as HRESULT;

pub const INVALID_HANDLE_VALUE: HANDLE = !0 as HANDLE;

pub const FACILITY_NT_BIT: DWORD = 0x1000_0000;

pub const FORMAT_MESSAGE_FROM_SYSTEM: DWORD = 0x00001000;
pub const FORMAT_MESSAGE_FROM_HMODULE: DWORD = 0x00000800;
pub const FORMAT_MESSAGE_IGNORE_INSERTS: DWORD = 0x00000200;

pub const TLS_OUT_OF_INDEXES: DWORD = 0xFFFFFFFF;

pub const DLL_THREAD_DETACH: DWORD = 3;
pub const DLL_PROCESS_DETACH: DWORD = 0;

pub const INFINITE: DWORD = !0;

pub const DUPLICATE_SAME_ACCESS: DWORD = 0x00000002;

pub const CONDITION_VARIABLE_INIT: CONDITION_VARIABLE = CONDITION_VARIABLE {
    ptr: ptr::null_mut(),
};
pub const SRWLOCK_INIT: SRWLOCK = SRWLOCK { ptr: ptr::null_mut() };

pub const DETACHED_PROCESS: DWORD = 0x00000008;
pub const CREATE_NEW_PROCESS_GROUP: DWORD = 0x00000200;
pub const CREATE_UNICODE_ENVIRONMENT: DWORD = 0x00000400;
pub const STARTF_USESTDHANDLES: DWORD = 0x00000100;

pub const AF_INET: c_int = 2;
pub const AF_INET6: c_int = 23;
pub const SD_BOTH: c_int = 2;
pub const SD_RECEIVE: c_int = 0;
pub const SD_SEND: c_int = 1;
pub const SOCK_DGRAM: c_int = 2;
pub const SOCK_STREAM: c_int = 1;
pub const SOL_SOCKET: c_int = 0xffff;
pub const SO_RCVTIMEO: c_int = 0x1006;
pub const SO_SNDTIMEO: c_int = 0x1005;
pub const SO_REUSEADDR: c_int = 0x0004;
pub const IPPROTO_IP: c_int = 0;
pub const IPPROTO_TCP: c_int = 6;
pub const IPPROTO_IPV6: c_int = 41;
pub const TCP_NODELAY: c_int = 0x0001;
pub const IP_TTL: c_int = 4;
pub const IPV6_V6ONLY: c_int = 27;
pub const SO_ERROR: c_int = 0x1007;
pub const SO_BROADCAST: c_int = 0x0020;
pub const IP_MULTICAST_LOOP: c_int = 11;
pub const IPV6_MULTICAST_LOOP: c_int = 11;
pub const IP_MULTICAST_TTL: c_int = 10;
pub const IP_ADD_MEMBERSHIP: c_int = 12;
pub const IP_DROP_MEMBERSHIP: c_int = 13;
pub const IPV6_ADD_MEMBERSHIP: c_int = 12;
pub const IPV6_DROP_MEMBERSHIP: c_int = 13;
pub const MSG_PEEK: c_int = 0x2;

#[repr(C)]
pub struct ip_mreq {
    pub imr_multiaddr: in_addr,
    pub imr_interface: in_addr,
}

#[repr(C)]
pub struct ipv6_mreq {
    pub ipv6mr_multiaddr: in6_addr,
    pub ipv6mr_interface: c_uint,
}

pub const VOLUME_NAME_DOS: DWORD = 0x0;
pub const MOVEFILE_REPLACE_EXISTING: DWORD = 1;

pub const FILE_BEGIN: DWORD = 0;
pub const FILE_CURRENT: DWORD = 1;
pub const FILE_END: DWORD = 2;

pub const WAIT_OBJECT_0: DWORD = 0x00000000;
pub const WAIT_TIMEOUT: DWORD = 258;
pub const WAIT_FAILED: DWORD = 0xFFFFFFFF;

#[cfg(target_env = "msvc")]
#[cfg(feature = "backtrace")]
pub const MAX_SYM_NAME: usize = 2000;
#[cfg(target_arch = "x86")]
#[cfg(feature = "backtrace")]
pub const IMAGE_FILE_MACHINE_I386: DWORD = 0x014c;
#[cfg(target_arch = "x86_64")]
#[cfg(feature = "backtrace")]
pub const IMAGE_FILE_MACHINE_AMD64: DWORD = 0x8664;
#[cfg(target_arch = "aarch64")]
#[cfg(feature = "backtrace")]
pub const IMAGE_FILE_MACHINE_ARM64: DWORD = 0xAA64;
#[cfg(target_arch = "arm")]
#[cfg(feature = "backtrace")]
pub const IMAGE_FILE_MACHINE_ARMNT: DWORD = 0x01c4;

pub const EXCEPTION_CONTINUE_SEARCH: LONG = 0;
pub const EXCEPTION_STACK_OVERFLOW: DWORD = 0xc00000fd;
pub const EXCEPTION_MAXIMUM_PARAMETERS: usize = 15;

pub const PIPE_ACCESS_INBOUND: DWORD = 0x00000001;
pub const PIPE_ACCESS_OUTBOUND: DWORD = 0x00000002;
pub const FILE_FLAG_FIRST_PIPE_INSTANCE: DWORD = 0x00080000;
pub const FILE_FLAG_OVERLAPPED: DWORD = 0x40000000;
pub const PIPE_WAIT: DWORD = 0x00000000;
pub const PIPE_TYPE_BYTE: DWORD = 0x00000000;
pub const PIPE_REJECT_REMOTE_CLIENTS: DWORD = 0x00000008;
pub const PIPE_READMODE_BYTE: DWORD = 0x00000000;

pub const FD_SETSIZE: usize = 64;

pub const STACK_SIZE_PARAM_IS_A_RESERVATION: DWORD = 0x00010000;

pub const HEAP_ZERO_MEMORY: DWORD = 0x00000008;

#[repr(C)]
#[cfg(not(target_pointer_width = "64"))]
pub struct WSADATA {
    pub wVersion: WORD,
    pub wHighVersion: WORD,
    pub szDescription: [u8; WSADESCRIPTION_LEN + 1],
    pub szSystemStatus: [u8; WSASYS_STATUS_LEN + 1],
    pub iMaxSockets: u16,
    pub iMaxUdpDg: u16,
    pub lpVendorInfo: *mut u8,
}
#[repr(C)]
#[cfg(target_pointer_width = "64")]
pub struct WSADATA {
    pub wVersion: WORD,
    pub wHighVersion: WORD,
    pub iMaxSockets: u16,
    pub iMaxUdpDg: u16,
    pub lpVendorInfo: *mut u8,
    pub szDescription: [u8; WSADESCRIPTION_LEN + 1],
    pub szSystemStatus: [u8; WSASYS_STATUS_LEN + 1],
}

#[repr(C)]
pub struct WSABUF {
    pub len: ULONG,
    pub buf: *mut CHAR,
}

#[repr(C)]
pub struct WSAPROTOCOL_INFO {
    pub dwServiceFlags1: DWORD,
    pub dwServiceFlags2: DWORD,
    pub dwServiceFlags3: DWORD,
    pub dwServiceFlags4: DWORD,
    pub dwProviderFlags: DWORD,
    pub ProviderId: GUID,
    pub dwCatalogEntryId: DWORD,
    pub ProtocolChain: WSAPROTOCOLCHAIN,
    pub iVersion: c_int,
    pub iAddressFamily: c_int,
    pub iMaxSockAddr: c_int,
    pub iMinSockAddr: c_int,
    pub iSocketType: c_int,
    pub iProtocol: c_int,
    pub iProtocolMaxOffset: c_int,
    pub iNetworkByteOrder: c_int,
    pub iSecurityScheme: c_int,
    pub dwMessageSize: DWORD,
    pub dwProviderReserved: DWORD,
    pub szProtocol: [u16; (WSAPROTOCOL_LEN as usize) + 1],
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct WIN32_FILE_ATTRIBUTE_DATA {
    pub dwFileAttributes: DWORD,
    pub ftCreationTime: FILETIME,
    pub ftLastAccessTime: FILETIME,
    pub ftLastWriteTime: FILETIME,
    pub nFileSizeHigh: DWORD,
    pub nFileSizeLow: DWORD,
}

#[repr(C)]
pub struct BY_HANDLE_FILE_INFORMATION {
    pub dwFileAttributes: DWORD,
    pub ftCreationTime: FILETIME,
    pub ftLastAccessTime: FILETIME,
    pub ftLastWriteTime: FILETIME,
    pub dwVolumeSerialNumber: DWORD,
    pub nFileSizeHigh: DWORD,
    pub nFileSizeLow: DWORD,
    pub nNumberOfLinks: DWORD,
    pub nFileIndexHigh: DWORD,
    pub nFileIndexLow: DWORD,
}

#[repr(C)]
#[allow(dead_code)] // we only use some variants
pub enum FILE_INFO_BY_HANDLE_CLASS {
    FileBasicInfo                   = 0,
    FileStandardInfo                = 1,
    FileNameInfo                    = 2,
    FileRenameInfo                  = 3,
    FileDispositionInfo             = 4,
    FileAllocationInfo              = 5,
    FileEndOfFileInfo               = 6,
    FileStreamInfo                  = 7,
    FileCompressionInfo             = 8,
    FileAttributeTagInfo            = 9,
    FileIdBothDirectoryInfo         = 10, // 0xA
    FileIdBothDirectoryRestartInfo  = 11, // 0xB
    FileIoPriorityHintInfo          = 12, // 0xC
    FileRemoteProtocolInfo          = 13, // 0xD
    FileFullDirectoryInfo           = 14, // 0xE
    FileFullDirectoryRestartInfo    = 15, // 0xF
    FileStorageInfo                 = 16, // 0x10
    FileAlignmentInfo               = 17, // 0x11
    FileIdInfo                      = 18, // 0x12
    FileIdExtdDirectoryInfo         = 19, // 0x13
    FileIdExtdDirectoryRestartInfo  = 20, // 0x14
    MaximumFileInfoByHandlesClass
}

#[repr(C)]
pub struct FILE_BASIC_INFO {
    pub CreationTime: LARGE_INTEGER,
    pub LastAccessTime: LARGE_INTEGER,
    pub LastWriteTime: LARGE_INTEGER,
    pub ChangeTime: LARGE_INTEGER,
    pub FileAttributes: DWORD,
}

#[repr(C)]
pub struct FILE_END_OF_FILE_INFO {
    pub EndOfFile: LARGE_INTEGER,
}

#[repr(C)]
pub struct REPARSE_DATA_BUFFER {
    pub ReparseTag: c_uint,
    pub ReparseDataLength: c_ushort,
    pub Reserved: c_ushort,
    pub rest: (),
}

#[repr(C)]
pub struct SYMBOLIC_LINK_REPARSE_BUFFER {
    pub SubstituteNameOffset: c_ushort,
    pub SubstituteNameLength: c_ushort,
    pub PrintNameOffset: c_ushort,
    pub PrintNameLength: c_ushort,
    pub Flags: c_ulong,
    pub PathBuffer: WCHAR,
}

#[repr(C)]
pub struct MOUNT_POINT_REPARSE_BUFFER {
    pub SubstituteNameOffset: c_ushort,
    pub SubstituteNameLength: c_ushort,
    pub PrintNameOffset: c_ushort,
    pub PrintNameLength: c_ushort,
    pub PathBuffer: WCHAR,
}

pub type LPPROGRESS_ROUTINE = crate::option::Option<unsafe extern "system" fn(
    TotalFileSize: LARGE_INTEGER,
    TotalBytesTransferred: LARGE_INTEGER,
    StreamSize: LARGE_INTEGER,
    StreamBytesTransferred: LARGE_INTEGER,
    dwStreamNumber: DWORD,
    dwCallbackReason: DWORD,
    hSourceFile: HANDLE,
    hDestinationFile: HANDLE,
    lpData: LPVOID,
) -> DWORD>;

#[repr(C)]
pub struct CONDITION_VARIABLE { pub ptr: LPVOID }
#[repr(C)]
pub struct SRWLOCK { pub ptr: LPVOID }
#[repr(C)]
pub struct CRITICAL_SECTION {
    CriticalSectionDebug: LPVOID,
    LockCount: LONG,
    RecursionCount: LONG,
    OwningThread: HANDLE,
    LockSemaphore: HANDLE,
    SpinCount: ULONG_PTR
}

#[repr(C)]
pub struct REPARSE_MOUNTPOINT_DATA_BUFFER {
    pub ReparseTag: DWORD,
    pub ReparseDataLength: DWORD,
    pub Reserved: WORD,
    pub ReparseTargetLength: WORD,
    pub ReparseTargetMaximumLength: WORD,
    pub Reserved1: WORD,
    pub ReparseTarget: WCHAR,
}

#[repr(C)]
pub struct EXCEPTION_RECORD {
    pub ExceptionCode: DWORD,
    pub ExceptionFlags: DWORD,
    pub ExceptionRecord: *mut EXCEPTION_RECORD,
    pub ExceptionAddress: LPVOID,
    pub NumberParameters: DWORD,
    pub ExceptionInformation: [LPVOID; EXCEPTION_MAXIMUM_PARAMETERS]
}

#[repr(C)]
pub struct EXCEPTION_POINTERS {
    pub ExceptionRecord: *mut EXCEPTION_RECORD,
    pub ContextRecord: *mut CONTEXT,
}

pub type PVECTORED_EXCEPTION_HANDLER = extern "system"
        fn(ExceptionInfo: *mut EXCEPTION_POINTERS) -> LONG;

#[repr(C)]
pub struct GUID {
    pub Data1: DWORD,
    pub Data2: WORD,
    pub Data3: WORD,
    pub Data4: [BYTE; 8],
}

#[repr(C)]
pub struct WSAPROTOCOLCHAIN {
    pub ChainLen: c_int,
    pub ChainEntries: [DWORD; MAX_PROTOCOL_CHAIN as usize],
}

#[repr(C)]
pub struct SECURITY_ATTRIBUTES {
    pub nLength: DWORD,
    pub lpSecurityDescriptor: LPVOID,
    pub bInheritHandle: BOOL,
}

#[repr(C)]
pub struct PROCESS_INFORMATION {
    pub hProcess: HANDLE,
    pub hThread: HANDLE,
    pub dwProcessId: DWORD,
    pub dwThreadId: DWORD,
}

#[repr(C)]
pub struct STARTUPINFO {
    pub cb: DWORD,
    pub lpReserved: LPWSTR,
    pub lpDesktop: LPWSTR,
    pub lpTitle: LPWSTR,
    pub dwX: DWORD,
    pub dwY: DWORD,
    pub dwXSize: DWORD,
    pub dwYSize: DWORD,
    pub dwXCountChars: DWORD,
    pub dwYCountCharts: DWORD,
    pub dwFillAttribute: DWORD,
    pub dwFlags: DWORD,
    pub wShowWindow: WORD,
    pub cbReserved2: WORD,
    pub lpReserved2: LPBYTE,
    pub hStdInput: HANDLE,
    pub hStdOutput: HANDLE,
    pub hStdError: HANDLE,
}

#[repr(C)]
pub struct SOCKADDR {
    pub sa_family: ADDRESS_FAMILY,
    pub sa_data: [CHAR; 14],
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct FILETIME {
    pub dwLowDateTime: DWORD,
    pub dwHighDateTime: DWORD,
}

#[repr(C)]
pub struct OVERLAPPED {
    pub Internal: *mut c_ulong,
    pub InternalHigh: *mut c_ulong,
    pub Offset: DWORD,
    pub OffsetHigh: DWORD,
    pub hEvent: HANDLE,
}

#[repr(C)]
#[cfg(target_env = "msvc")]
#[cfg(feature = "backtrace")]
pub struct SYMBOL_INFO {
    pub SizeOfStruct: c_ulong,
    pub TypeIndex: c_ulong,
    pub Reserved: [u64; 2],
    pub Index: c_ulong,
    pub Size: c_ulong,
    pub ModBase: u64,
    pub Flags: c_ulong,
    pub Value: u64,
    pub Address: u64,
    pub Register: c_ulong,
    pub Scope: c_ulong,
    pub Tag: c_ulong,
    pub NameLen: c_ulong,
    pub MaxNameLen: c_ulong,
    // note that windows has this as 1, but it basically just means that
    // the name is inline at the end of the struct. For us, we just bump
    // the struct size up to MAX_SYM_NAME.
    pub Name: [c_char; MAX_SYM_NAME],
}

#[repr(C)]
#[cfg(target_env = "msvc")]
#[cfg(feature = "backtrace")]
pub struct IMAGEHLP_LINE64 {
    pub SizeOfStruct: u32,
    pub Key: *const c_void,
    pub LineNumber: u32,
    pub Filename: *const c_char,
    pub Address: u64,
}

#[repr(C)]
#[allow(dead_code)] // we only use some variants
pub enum ADDRESS_MODE {
    AddrMode1616,
    AddrMode1632,
    AddrModeReal,
    AddrModeFlat,
}

#[repr(C)]
#[cfg(feature = "backtrace")]
pub struct ADDRESS64 {
    pub Offset: u64,
    pub Segment: u16,
    pub Mode: ADDRESS_MODE,
}

#[repr(C)]
#[cfg(feature = "backtrace")]
pub struct STACKFRAME_EX {
    pub AddrPC: ADDRESS64,
    pub AddrReturn: ADDRESS64,
    pub AddrFrame: ADDRESS64,
    pub AddrStack: ADDRESS64,
    pub AddrBStore: ADDRESS64,
    pub FuncTableEntry: *mut c_void,
    pub Params: [u64; 4],
    pub Far: BOOL,
    pub Virtual: BOOL,
    pub Reserved: [u64; 3],
    pub KdHelp: KDHELP64,
    pub StackFrameSize: DWORD,
    pub InlineFrameContext: DWORD,
}

#[repr(C)]
#[cfg(feature = "backtrace")]
pub struct STACKFRAME64 {
    pub AddrPC: ADDRESS64,
    pub AddrReturn: ADDRESS64,
    pub AddrFrame: ADDRESS64,
    pub AddrStack: ADDRESS64,
    pub AddrBStore: ADDRESS64,
    pub FuncTableEntry: *mut c_void,
    pub Params: [u64; 4],
    pub Far: BOOL,
    pub Virtual: BOOL,
    pub Reserved: [u64; 3],
    pub KdHelp: KDHELP64,
}

#[repr(C)]
#[cfg(feature = "backtrace")]
pub struct KDHELP64 {
    pub Thread: u64,
    pub ThCallbackStack: DWORD,
    pub ThCallbackBStore: DWORD,
    pub NextCallback: DWORD,
    pub FramePointer: DWORD,
    pub KiCallUserMode: u64,
    pub KeUserCallbackDispatcher: u64,
    pub SystemRangeStart: u64,
    pub KiUserExceptionDispatcher: u64,
    pub StackBase: u64,
    pub StackLimit: u64,
    pub Reserved: [u64; 5],
}

#[cfg(target_arch = "x86")]
#[repr(C)]
pub struct CONTEXT {
    pub ContextFlags: DWORD,
    pub Dr0: DWORD,
    pub Dr1: DWORD,
    pub Dr2: DWORD,
    pub Dr3: DWORD,
    pub Dr6: DWORD,
    pub Dr7: DWORD,
    pub FloatSave: FLOATING_SAVE_AREA,
    pub SegGs: DWORD,
    pub SegFs: DWORD,
    pub SegEs: DWORD,
    pub SegDs: DWORD,
    pub Edi: DWORD,
    pub Esi: DWORD,
    pub Ebx: DWORD,
    pub Edx: DWORD,
    pub Ecx: DWORD,
    pub Eax: DWORD,
    pub Ebp: DWORD,
    pub Eip: DWORD,
    pub SegCs: DWORD,
    pub EFlags: DWORD,
    pub Esp: DWORD,
    pub SegSs: DWORD,
    pub ExtendedRegisters: [u8; 512],
}

#[cfg(target_arch = "x86")]
#[repr(C)]
pub struct FLOATING_SAVE_AREA {
    pub ControlWord: DWORD,
    pub StatusWord: DWORD,
    pub TagWord: DWORD,
    pub ErrorOffset: DWORD,
    pub ErrorSelector: DWORD,
    pub DataOffset: DWORD,
    pub DataSelector: DWORD,
    pub RegisterArea: [u8; 80],
    pub Cr0NpxState: DWORD,
}

#[cfg(target_arch = "x86_64")]
#[repr(C, align(16))]
pub struct CONTEXT {
    pub P1Home: DWORDLONG,
    pub P2Home: DWORDLONG,
    pub P3Home: DWORDLONG,
    pub P4Home: DWORDLONG,
    pub P5Home: DWORDLONG,
    pub P6Home: DWORDLONG,

    pub ContextFlags: DWORD,
    pub MxCsr: DWORD,

    pub SegCs: WORD,
    pub SegDs: WORD,
    pub SegEs: WORD,
    pub SegFs: WORD,
    pub SegGs: WORD,
    pub SegSs: WORD,
    pub EFlags: DWORD,

    pub Dr0: DWORDLONG,
    pub Dr1: DWORDLONG,
    pub Dr2: DWORDLONG,
    pub Dr3: DWORDLONG,
    pub Dr6: DWORDLONG,
    pub Dr7: DWORDLONG,

    pub Rax: DWORDLONG,
    pub Rcx: DWORDLONG,
    pub Rdx: DWORDLONG,
    pub Rbx: DWORDLONG,
    pub Rsp: DWORDLONG,
    pub Rbp: DWORDLONG,
    pub Rsi: DWORDLONG,
    pub Rdi: DWORDLONG,
    pub R8:  DWORDLONG,
    pub R9:  DWORDLONG,
    pub R10: DWORDLONG,
    pub R11: DWORDLONG,
    pub R12: DWORDLONG,
    pub R13: DWORDLONG,
    pub R14: DWORDLONG,
    pub R15: DWORDLONG,

    pub Rip: DWORDLONG,

    pub FltSave: FLOATING_SAVE_AREA,

    pub VectorRegister: [M128A; 26],
    pub VectorControl: DWORDLONG,

    pub DebugControl: DWORDLONG,
    pub LastBranchToRip: DWORDLONG,
    pub LastBranchFromRip: DWORDLONG,
    pub LastExceptionToRip: DWORDLONG,
    pub LastExceptionFromRip: DWORDLONG,
}

#[cfg(target_arch = "x86_64")]
#[repr(C, align(16))]
pub struct M128A {
    pub Low:  c_ulonglong,
    pub High: c_longlong
}

#[cfg(target_arch = "x86_64")]
#[repr(C, align(16))]
pub struct FLOATING_SAVE_AREA {
    _Dummy: [u8; 512] // FIXME: Fill this out
}

#[cfg(target_arch = "arm")]
#[repr(C)]
pub struct CONTEXT {
    pub ContextFlags: ULONG,
    pub R0: ULONG,
    pub R1: ULONG,
    pub R2: ULONG,
    pub R3: ULONG,
    pub R4: ULONG,
    pub R5: ULONG,
    pub R6: ULONG,
    pub R7: ULONG,
    pub R8: ULONG,
    pub R9: ULONG,
    pub R10: ULONG,
    pub R11: ULONG,
    pub R12: ULONG,
    pub Sp: ULONG,
    pub Lr: ULONG,
    pub Pc: ULONG,
    pub Cpsr: ULONG,
    pub Fpscr: ULONG,
    pub Padding: ULONG,
    pub D: [u64; 32],
    pub Bvr: [ULONG; ARM_MAX_BREAKPOINTS],
    pub Bcr: [ULONG; ARM_MAX_BREAKPOINTS],
    pub Wvr: [ULONG; ARM_MAX_WATCHPOINTS],
    pub Wcr: [ULONG; ARM_MAX_WATCHPOINTS],
    pub Padding2: [ULONG; 2]
}

// FIXME(#43348): This structure is used for backtrace only, and a fake
// definition is provided here only to allow rustdoc to pass type-check. This
// will not appear in the final documentation. This should be also defined for
// other architectures supported by Windows such as ARM, and for historical
// interest, maybe MIPS and PowerPC as well.
#[cfg(all(rustdoc, not(any(target_arch = "x86_64", target_arch = "x86",
      target_arch = "aarch64", target_arch = "arm"))))]
pub enum CONTEXT {}

#[cfg(target_arch = "aarch64")]
pub const ARM64_MAX_BREAKPOINTS: usize = 8;

#[cfg(target_arch = "aarch64")]
pub const ARM64_MAX_WATCHPOINTS: usize = 2;

#[cfg(target_arch = "aarch64")]
#[repr(C)]
pub struct ARM64_NT_NEON128 {
    pub D: [f64; 2],
}

#[cfg(target_arch = "aarch64")]
#[repr(C, align(16))]
pub struct CONTEXT {
    pub ContextFlags: DWORD,
    pub Cpsr: DWORD,
    pub X0: u64,
    pub X1: u64,
    pub X2: u64,
    pub X3: u64,
    pub X4: u64,
    pub X5: u64,
    pub X6: u64,
    pub X7: u64,
    pub X8: u64,
    pub X9: u64,
    pub X10: u64,
    pub X11: u64,
    pub X12: u64,
    pub X13: u64,
    pub X14: u64,
    pub X15: u64,
    pub X16: u64,
    pub X17: u64,
    pub X18: u64,
    pub X19: u64,
    pub X20: u64,
    pub X21: u64,
    pub X22: u64,
    pub X23: u64,
    pub X24: u64,
    pub X25: u64,
    pub X26: u64,
    pub X27: u64,
    pub X28: u64,
    pub Fp: u64,
    pub Lr: u64,
    pub Sp: u64,
    pub Pc: u64,
    pub V: [ARM64_NT_NEON128; 32],
    pub Fpcr: DWORD,
    pub Fpsr: DWORD,
    pub Bcr: [DWORD; ARM64_MAX_BREAKPOINTS],
    pub Bvr: [DWORD; ARM64_MAX_BREAKPOINTS],
    pub Wcr: [DWORD; ARM64_MAX_WATCHPOINTS],
    pub Wvr: [DWORD; ARM64_MAX_WATCHPOINTS],
}

#[repr(C)]
pub struct SOCKADDR_STORAGE_LH {
    pub ss_family: ADDRESS_FAMILY,
    pub __ss_pad1: [CHAR; 6],
    pub __ss_align: i64,
    pub __ss_pad2: [CHAR; 112],
}

#[repr(C)]
pub struct ADDRINFOA {
    pub ai_flags: c_int,
    pub ai_family: c_int,
    pub ai_socktype: c_int,
    pub ai_protocol: c_int,
    pub ai_addrlen: size_t,
    pub ai_canonname: *mut c_char,
    pub ai_addr: *mut SOCKADDR,
    pub ai_next: *mut ADDRINFOA,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct sockaddr_in {
    pub sin_family: ADDRESS_FAMILY,
    pub sin_port: USHORT,
    pub sin_addr: in_addr,
    pub sin_zero: [CHAR; 8],
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct sockaddr_in6 {
    pub sin6_family: ADDRESS_FAMILY,
    pub sin6_port: USHORT,
    pub sin6_flowinfo: c_ulong,
    pub sin6_addr: in6_addr,
    pub sin6_scope_id: c_ulong,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct in_addr {
    pub s_addr: u32,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct in6_addr {
    pub s6_addr: [u8; 16],
}

#[repr(C)]
#[derive(Copy, Clone)]
#[allow(dead_code)] // we only use some variants
pub enum EXCEPTION_DISPOSITION {
    ExceptionContinueExecution,
    ExceptionContinueSearch,
    ExceptionNestedException,
    ExceptionCollidedUnwind
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct CONSOLE_READCONSOLE_CONTROL {
    pub nLength: ULONG,
    pub nInitialChars: ULONG,
    pub dwCtrlWakeupMask: ULONG,
    pub dwControlKeyState: ULONG,
}
pub type PCONSOLE_READCONSOLE_CONTROL = *mut CONSOLE_READCONSOLE_CONTROL;

#[repr(C)]
#[derive(Copy)]
pub struct fd_set {
    pub fd_count: c_uint,
    pub fd_array: [SOCKET; FD_SETSIZE],
}

impl Clone for fd_set {
    fn clone(&self) -> fd_set {
        *self
    }
}

#[repr(C)]
#[derive(Copy, Clone)]
pub struct timeval {
    pub tv_sec: c_long,
    pub tv_usec: c_long,
}

extern "system" {
    pub fn WSAStartup(wVersionRequested: WORD,
                      lpWSAData: LPWSADATA) -> c_int;
    pub fn WSACleanup() -> c_int;
    pub fn WSAGetLastError() -> c_int;
    pub fn WSADuplicateSocketW(s: SOCKET,
                               dwProcessId: DWORD,
                               lpProtocolInfo: LPWSAPROTOCOL_INFO)
                               -> c_int;
    pub fn WSASend(s: SOCKET,
                   lpBuffers: LPWSABUF,
                   dwBufferCount: DWORD,
                   lpNumberOfBytesSent: LPDWORD,
                   dwFlags: DWORD,
                   lpOverlapped: LPWSAOVERLAPPED,
                   lpCompletionRoutine: LPWSAOVERLAPPED_COMPLETION_ROUTINE)
                   -> c_int;
    pub fn WSARecv(s: SOCKET,
                   lpBuffers: LPWSABUF,
                   dwBufferCount: DWORD,
                   lpNumberOfBytesRecvd: LPDWORD,
                   lpFlags: LPDWORD,
                   lpOverlapped: LPWSAOVERLAPPED,
                   lpCompletionRoutine: LPWSAOVERLAPPED_COMPLETION_ROUTINE)
                   -> c_int;
    pub fn GetCurrentProcessId() -> DWORD;
    pub fn WSASocketW(af: c_int,
                      kind: c_int,
                      protocol: c_int,
                      lpProtocolInfo: LPWSAPROTOCOL_INFO,
                      g: GROUP,
                      dwFlags: DWORD) -> SOCKET;
    pub fn ioctlsocket(s: SOCKET, cmd: c_long, argp: *mut c_ulong) -> c_int;
    pub fn InitializeCriticalSection(CriticalSection: *mut CRITICAL_SECTION);
    pub fn EnterCriticalSection(CriticalSection: *mut CRITICAL_SECTION);
    pub fn TryEnterCriticalSection(CriticalSection: *mut CRITICAL_SECTION) -> BOOLEAN;
    pub fn LeaveCriticalSection(CriticalSection: *mut CRITICAL_SECTION);
    pub fn DeleteCriticalSection(CriticalSection: *mut CRITICAL_SECTION);

    pub fn ReadConsoleW(hConsoleInput: HANDLE,
                        lpBuffer: LPVOID,
                        nNumberOfCharsToRead: DWORD,
                        lpNumberOfCharsRead: LPDWORD,
                        pInputControl: PCONSOLE_READCONSOLE_CONTROL) -> BOOL;

    pub fn WriteConsoleW(hConsoleOutput: HANDLE,
                         lpBuffer: LPCVOID,
                         nNumberOfCharsToWrite: DWORD,
                         lpNumberOfCharsWritten: LPDWORD,
                         lpReserved: LPVOID) -> BOOL;

    pub fn GetConsoleMode(hConsoleHandle: HANDLE,
                          lpMode: LPDWORD) -> BOOL;
    pub fn RemoveDirectoryW(lpPathName: LPCWSTR) -> BOOL;
    pub fn SetFileAttributesW(lpFileName: LPCWSTR,
                              dwFileAttributes: DWORD) -> BOOL;
    pub fn GetFileInformationByHandle(hFile: HANDLE,
                            lpFileInformation: LPBY_HANDLE_FILE_INFORMATION)
                            -> BOOL;

    pub fn SetLastError(dwErrCode: DWORD);
    pub fn GetCommandLineW() -> *mut LPCWSTR;
    pub fn GetTempPathW(nBufferLength: DWORD,
                        lpBuffer: LPCWSTR) -> DWORD;
    pub fn OpenProcessToken(ProcessHandle: HANDLE,
                            DesiredAccess: DWORD,
                            TokenHandle: *mut HANDLE) -> BOOL;
    pub fn GetCurrentProcess() -> HANDLE;
    pub fn GetCurrentThread() -> HANDLE;
    pub fn GetStdHandle(which: DWORD) -> HANDLE;
    pub fn ExitProcess(uExitCode: c_uint) -> !;
    pub fn DeviceIoControl(hDevice: HANDLE,
                           dwIoControlCode: DWORD,
                           lpInBuffer: LPVOID,
                           nInBufferSize: DWORD,
                           lpOutBuffer: LPVOID,
                           nOutBufferSize: DWORD,
                           lpBytesReturned: LPDWORD,
                           lpOverlapped: LPOVERLAPPED) -> BOOL;
    pub fn CreateThread(lpThreadAttributes: LPSECURITY_ATTRIBUTES,
                        dwStackSize: SIZE_T,
                        lpStartAddress: extern "system" fn(*mut c_void)
                                                           -> DWORD,
                        lpParameter: LPVOID,
                        dwCreationFlags: DWORD,
                        lpThreadId: LPDWORD) -> HANDLE;
    pub fn WaitForSingleObject(hHandle: HANDLE,
                               dwMilliseconds: DWORD) -> DWORD;
    pub fn SwitchToThread() -> BOOL;
    pub fn Sleep(dwMilliseconds: DWORD);
    pub fn GetProcessId(handle: HANDLE) -> DWORD;
    pub fn GetUserProfileDirectoryW(hToken: HANDLE,
                                    lpProfileDir: LPWSTR,
                                    lpcchSize: *mut DWORD) -> BOOL;
    pub fn SetHandleInformation(hObject: HANDLE,
                                dwMask: DWORD,
                                dwFlags: DWORD) -> BOOL;
    pub fn CopyFileExW(lpExistingFileName: LPCWSTR,
                       lpNewFileName: LPCWSTR,
                       lpProgressRoutine: LPPROGRESS_ROUTINE,
                       lpData: LPVOID,
                       pbCancel: LPBOOL,
                       dwCopyFlags: DWORD) -> BOOL;
    pub fn AddVectoredExceptionHandler(FirstHandler: ULONG,
                                       VectoredHandler: PVECTORED_EXCEPTION_HANDLER)
                                       -> LPVOID;
    pub fn FormatMessageW(flags: DWORD,
                          lpSrc: LPVOID,
                          msgId: DWORD,
                          langId: DWORD,
                          buf: LPWSTR,
                          nsize: DWORD,
                          args: *const c_void)
                          -> DWORD;
    pub fn TlsAlloc() -> DWORD;
    pub fn TlsGetValue(dwTlsIndex: DWORD) -> LPVOID;
    pub fn TlsSetValue(dwTlsIndex: DWORD, lpTlsvalue: LPVOID) -> BOOL;
    pub fn GetLastError() -> DWORD;
    pub fn QueryPerformanceFrequency(lpFrequency: *mut LARGE_INTEGER) -> BOOL;
    pub fn QueryPerformanceCounter(lpPerformanceCount: *mut LARGE_INTEGER)
                                   -> BOOL;
    pub fn GetExitCodeProcess(hProcess: HANDLE, lpExitCode: LPDWORD) -> BOOL;
    pub fn TerminateProcess(hProcess: HANDLE, uExitCode: UINT) -> BOOL;
    pub fn CreateProcessW(lpApplicationName: LPCWSTR,
                          lpCommandLine: LPWSTR,
                          lpProcessAttributes: LPSECURITY_ATTRIBUTES,
                          lpThreadAttributes: LPSECURITY_ATTRIBUTES,
                          bInheritHandles: BOOL,
                          dwCreationFlags: DWORD,
                          lpEnvironment: LPVOID,
                          lpCurrentDirectory: LPCWSTR,
                          lpStartupInfo: LPSTARTUPINFO,
                          lpProcessInformation: LPPROCESS_INFORMATION)
                          -> BOOL;
    pub fn GetEnvironmentVariableW(n: LPCWSTR, v: LPWSTR, nsize: DWORD) -> DWORD;
    pub fn SetEnvironmentVariableW(n: LPCWSTR, v: LPCWSTR) -> BOOL;
    pub fn GetEnvironmentStringsW() -> LPWCH;
    pub fn FreeEnvironmentStringsW(env_ptr: LPWCH) -> BOOL;
    pub fn GetModuleFileNameW(hModule: HMODULE,
                              lpFilename: LPWSTR,
                              nSize: DWORD)
                              -> DWORD;
    pub fn CreateDirectoryW(lpPathName: LPCWSTR,
                            lpSecurityAttributes: LPSECURITY_ATTRIBUTES)
                            -> BOOL;
    pub fn DeleteFileW(lpPathName: LPCWSTR) -> BOOL;
    pub fn GetCurrentDirectoryW(nBufferLength: DWORD, lpBuffer: LPWSTR) -> DWORD;
    pub fn SetCurrentDirectoryW(lpPathName: LPCWSTR) -> BOOL;
    pub fn WideCharToMultiByte(CodePage: UINT,
                               dwFlags: DWORD,
                               lpWideCharStr: LPCWSTR,
                               cchWideChar: c_int,
                               lpMultiByteStr: LPSTR,
                               cbMultiByte: c_int,
                               lpDefaultChar: LPCSTR,
                               lpUsedDefaultChar: LPBOOL) -> c_int;

    pub fn closesocket(socket: SOCKET) -> c_int;
    pub fn recv(socket: SOCKET, buf: *mut c_void, len: c_int,
                flags: c_int) -> c_int;
    pub fn send(socket: SOCKET, buf: *const c_void, len: c_int,
                flags: c_int) -> c_int;
    pub fn recvfrom(socket: SOCKET,
                    buf: *mut c_void,
                    len: c_int,
                    flags: c_int,
                    addr: *mut SOCKADDR,
                    addrlen: *mut c_int)
                    -> c_int;
    pub fn sendto(socket: SOCKET,
                  buf: *const c_void,
                  len: c_int,
                  flags: c_int,
                  addr: *const SOCKADDR,
                  addrlen: c_int)
                  -> c_int;
    pub fn shutdown(socket: SOCKET, how: c_int) -> c_int;
    pub fn accept(socket: SOCKET,
                  address: *mut SOCKADDR,
                  address_len: *mut c_int)
                  -> SOCKET;
    pub fn DuplicateHandle(hSourceProcessHandle: HANDLE,
                           hSourceHandle: HANDLE,
                           hTargetProcessHandle: HANDLE,
                           lpTargetHandle: LPHANDLE,
                           dwDesiredAccess: DWORD,
                           bInheritHandle: BOOL,
                           dwOptions: DWORD)
                           -> BOOL;
    pub fn ReadFile(hFile: HANDLE,
                    lpBuffer: LPVOID,
                    nNumberOfBytesToRead: DWORD,
                    lpNumberOfBytesRead: LPDWORD,
                    lpOverlapped: LPOVERLAPPED)
                    -> BOOL;
    pub fn WriteFile(hFile: HANDLE,
                     lpBuffer: LPVOID,
                     nNumberOfBytesToWrite: DWORD,
                     lpNumberOfBytesWritten: LPDWORD,
                     lpOverlapped: LPOVERLAPPED)
                     -> BOOL;
    pub fn CloseHandle(hObject: HANDLE) -> BOOL;
    pub fn CreateHardLinkW(lpSymlinkFileName: LPCWSTR,
                           lpTargetFileName: LPCWSTR,
                           lpSecurityAttributes: LPSECURITY_ATTRIBUTES)
                           -> BOOL;
    pub fn MoveFileExW(lpExistingFileName: LPCWSTR,
                       lpNewFileName: LPCWSTR,
                       dwFlags: DWORD)
                       -> BOOL;
    pub fn SetFilePointerEx(hFile: HANDLE,
                            liDistanceToMove: LARGE_INTEGER,
                            lpNewFilePointer: PLARGE_INTEGER,
                            dwMoveMethod: DWORD)
                            -> BOOL;
    pub fn FlushFileBuffers(hFile: HANDLE) -> BOOL;
    pub fn CreateFileW(lpFileName: LPCWSTR,
                       dwDesiredAccess: DWORD,
                       dwShareMode: DWORD,
                       lpSecurityAttributes: LPSECURITY_ATTRIBUTES,
                       dwCreationDisposition: DWORD,
                       dwFlagsAndAttributes: DWORD,
                       hTemplateFile: HANDLE)
                       -> HANDLE;

    pub fn FindFirstFileW(fileName: LPCWSTR,
                          findFileData: LPWIN32_FIND_DATAW)
                          -> HANDLE;
    pub fn FindNextFileW(findFile: HANDLE, findFileData: LPWIN32_FIND_DATAW)
                         -> BOOL;
    pub fn FindClose(findFile: HANDLE) -> BOOL;
    #[cfg(feature = "backtrace")]
    pub fn RtlCaptureContext(ctx: *mut CONTEXT);
    pub fn getsockopt(s: SOCKET,
                      level: c_int,
                      optname: c_int,
                      optval: *mut c_char,
                      optlen: *mut c_int)
                      -> c_int;
    pub fn setsockopt(s: SOCKET,
                      level: c_int,
                      optname: c_int,
                      optval: *const c_void,
                      optlen: c_int)
                      -> c_int;
    pub fn getsockname(socket: SOCKET,
                       address: *mut SOCKADDR,
                       address_len: *mut c_int)
                       -> c_int;
    pub fn getpeername(socket: SOCKET,
                       address: *mut SOCKADDR,
                       address_len: *mut c_int)
                       -> c_int;
    pub fn bind(socket: SOCKET, address: *const SOCKADDR,
                address_len: socklen_t) -> c_int;
    pub fn listen(socket: SOCKET, backlog: c_int) -> c_int;
    pub fn connect(socket: SOCKET, address: *const SOCKADDR, len: c_int)
                   -> c_int;
    pub fn getaddrinfo(node: *const c_char, service: *const c_char,
                       hints: *const ADDRINFOA,
                       res: *mut *mut ADDRINFOA) -> c_int;
    pub fn freeaddrinfo(res: *mut ADDRINFOA);

    #[cfg(feature = "backtrace")]
    pub fn LoadLibraryW(name: LPCWSTR) -> HMODULE;
    #[cfg(feature = "backtrace")]
    pub fn FreeLibrary(handle: HMODULE) -> BOOL;
    pub fn GetProcAddress(handle: HMODULE,
                          name: LPCSTR) -> *mut c_void;
    pub fn GetModuleHandleW(lpModuleName: LPCWSTR) -> HMODULE;

    pub fn GetSystemTimeAsFileTime(lpSystemTimeAsFileTime: LPFILETIME);

    pub fn CreateEventW(lpEventAttributes: LPSECURITY_ATTRIBUTES,
                        bManualReset: BOOL,
                        bInitialState: BOOL,
                        lpName: LPCWSTR) -> HANDLE;
    pub fn WaitForMultipleObjects(nCount: DWORD,
                                  lpHandles: *const HANDLE,
                                  bWaitAll: BOOL,
                                  dwMilliseconds: DWORD) -> DWORD;
    pub fn CreateNamedPipeW(lpName: LPCWSTR,
                            dwOpenMode: DWORD,
                            dwPipeMode: DWORD,
                            nMaxInstances: DWORD,
                            nOutBufferSize: DWORD,
                            nInBufferSize: DWORD,
                            nDefaultTimeOut: DWORD,
                            lpSecurityAttributes: LPSECURITY_ATTRIBUTES)
                            -> HANDLE;
    pub fn CancelIo(handle: HANDLE) -> BOOL;
    pub fn GetOverlappedResult(hFile: HANDLE,
                               lpOverlapped: LPOVERLAPPED,
                               lpNumberOfBytesTransferred: LPDWORD,
                               bWait: BOOL) -> BOOL;
    pub fn select(nfds: c_int,
                  readfds: *mut fd_set,
                  writefds: *mut fd_set,
                  exceptfds: *mut fd_set,
                  timeout: *const timeval) -> c_int;

    #[link_name = "SystemFunction036"]
    pub fn RtlGenRandom(RandomBuffer: *mut u8, RandomBufferLength: ULONG) -> BOOLEAN;

    pub fn GetProcessHeap() -> HANDLE;
    pub fn HeapAlloc(hHeap: HANDLE, dwFlags: DWORD, dwBytes: SIZE_T) -> LPVOID;
    pub fn HeapReAlloc(hHeap: HANDLE, dwFlags: DWORD, lpMem: LPVOID, dwBytes: SIZE_T) -> LPVOID;
    pub fn HeapFree(hHeap: HANDLE, dwFlags: DWORD, lpMem: LPVOID) -> BOOL;
}

// Functions that aren't available on every version of Windows that we support,
// but we still use them and just provide some form of a fallback implementation.
compat_fn! {
    kernel32:

    pub fn CreateSymbolicLinkW(_lpSymlinkFileName: LPCWSTR,
                               _lpTargetFileName: LPCWSTR,
                               _dwFlags: DWORD) -> BOOLEAN {
        SetLastError(ERROR_CALL_NOT_IMPLEMENTED as DWORD); 0
    }
    pub fn GetFinalPathNameByHandleW(_hFile: HANDLE,
                                     _lpszFilePath: LPCWSTR,
                                     _cchFilePath: DWORD,
                                     _dwFlags: DWORD) -> DWORD {
        SetLastError(ERROR_CALL_NOT_IMPLEMENTED as DWORD); 0
    }
    pub fn SetThreadStackGuarantee(_size: *mut c_ulong) -> BOOL {
        SetLastError(ERROR_CALL_NOT_IMPLEMENTED as DWORD); 0
    }
    pub fn SetThreadDescription(hThread: HANDLE,
                                lpThreadDescription: LPCWSTR) -> HRESULT {
        SetLastError(ERROR_CALL_NOT_IMPLEMENTED as DWORD); E_NOTIMPL
    }
    pub fn SetFileInformationByHandle(_hFile: HANDLE,
                    _FileInformationClass: FILE_INFO_BY_HANDLE_CLASS,
                    _lpFileInformation: LPVOID,
                    _dwBufferSize: DWORD) -> BOOL {
        SetLastError(ERROR_CALL_NOT_IMPLEMENTED as DWORD); 0
    }
    pub fn SleepConditionVariableSRW(ConditionVariable: PCONDITION_VARIABLE,
                                     SRWLock: PSRWLOCK,
                                     dwMilliseconds: DWORD,
                                     Flags: ULONG) -> BOOL {
        panic!("condition variables not available")
    }
    pub fn WakeConditionVariable(ConditionVariable: PCONDITION_VARIABLE)
                                 -> () {
        panic!("condition variables not available")
    }
    pub fn WakeAllConditionVariable(ConditionVariable: PCONDITION_VARIABLE)
                                    -> () {
        panic!("condition variables not available")
    }
    pub fn AcquireSRWLockExclusive(SRWLock: PSRWLOCK) -> () {
        panic!("rwlocks not available")
    }
    pub fn AcquireSRWLockShared(SRWLock: PSRWLOCK) -> () {
        panic!("rwlocks not available")
    }
    pub fn ReleaseSRWLockExclusive(SRWLock: PSRWLOCK) -> () {
        panic!("rwlocks not available")
    }
    pub fn ReleaseSRWLockShared(SRWLock: PSRWLOCK) -> () {
        panic!("rwlocks not available")
    }
    pub fn TryAcquireSRWLockExclusive(SRWLock: PSRWLOCK) -> BOOLEAN {
        panic!("rwlocks not available")
    }
    pub fn TryAcquireSRWLockShared(SRWLock: PSRWLOCK) -> BOOLEAN {
        panic!("rwlocks not available")
    }
}

#[cfg(all(target_env = "gnu", feature = "backtrace"))]
mod gnu {
    use super::*;

    pub const PROCESS_QUERY_INFORMATION: DWORD = 0x0400;

    pub const CP_ACP: UINT = 0;

    pub const WC_NO_BEST_FIT_CHARS: DWORD = 0x00000400;

    extern "system" {
        pub fn OpenProcess(dwDesiredAccess: DWORD,
                           bInheritHandle: BOOL,
                           dwProcessId: DWORD) -> HANDLE;
    }

    compat_fn! {
        kernel32:

        pub fn QueryFullProcessImageNameW(_hProcess: HANDLE,
                                          _dwFlags: DWORD,
                                          _lpExeName: LPWSTR,
                                          _lpdwSize: LPDWORD) -> BOOL {
            SetLastError(ERROR_CALL_NOT_IMPLEMENTED as DWORD); 0
        }
    }
}

#[cfg(all(target_env = "gnu", feature = "backtrace"))]
pub use self::gnu::*;