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libphobos: Merge upstream druntime 175bf5fc 

Backports extern(C) bindings committed to upstream druntime since the
last sync.

Reviewed-on: https://github.com/dlang/druntime/pull/2552

From-SVN: r270295
This commit is contained in:
Iain Buclaw 2019-04-11 21:11:03 +00:00
parent 258ad81197
commit 9607e404a5
16 changed files with 304 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libphobos/libdruntime/MERGE
View File

@ -1,4 +1,4 @@
d57fa1ffaecc858229ed7a730e8486b59197dee5
175bf5fc69d26fec60d533ff77f7e915fd5bb468
The first line of this file holds the git revision number of the last
merge done from the dlang/druntime repository.

3
libphobos/libdruntime/core/stdc/stdio.d
View File

@ -1643,9 +1643,6 @@ else version (CRuntime_Bionic)
}
else version (CRuntime_Musl)
{
import core.sys.posix.sys.types : off_t;
///
int fseeko(FILE *, off_t, int);
@trusted
{
///

21
libphobos/libdruntime/core/stdc/time.d
View File

@ -148,21 +148,22 @@ else
}
///
double difftime(time_t time1, time_t time0);
pure double difftime(time_t time1, time_t time0); // MT-Safe
///
time_t mktime(tm* timeptr);
@system time_t mktime(scope tm* timeptr); // @system: MT-Safe env locale
///
time_t time(time_t* timer);
time_t time(scope time_t* timer);
///
char* asctime(in tm* timeptr);
@system char* asctime(const scope tm* timeptr); // @system: MT-Unsafe race:asctime locale
///
char* ctime(in time_t* timer);
@system char* ctime(const scope time_t* timer); // @system: MT-Unsafe race:tmbuf race:asctime env locale
///
tm* gmtime(in time_t* timer);
@system tm* gmtime(const scope time_t* timer); // @system: MT-Unsafe race:tmbuf env locale
///
tm* localtime(in time_t* timer);
@system tm* localtime(const scope time_t* timer); // @system: MT-Unsafe race:tmbuf env locale
///
@system size_t strftime(char* s, size_t maxsize, in char* format, in tm* timeptr);
@system size_t strftime(scope char* s, size_t maxsize, const scope char* format, const scope tm* timeptr); // @system: MT-Safe env locale
version (Windows)
{
@ -171,9 +172,9 @@ version (Windows)
///
void _tzset(); // non-standard
///
@system char* _strdate(char* s); // non-standard
@system char* _strdate(return scope char* s); // non-standard
///
@system char* _strtime(char* s); // non-standard
@system char* _strtime(return scope char* s); // non-standard
///
extern __gshared const(char)*[2] tzname; // non-standard

7
libphobos/libdruntime/core/sync/condition.d
View File

@ -23,7 +23,12 @@ public import core.time;
version (Windows)
{
private import core.sync.semaphore;
private import core.sys.windows.windows;
private import core.sys.windows.basetsd /+: HANDLE+/;
private import core.sys.windows.winbase /+: CloseHandle, CreateSemaphoreA, CRITICAL_SECTION,
DeleteCriticalSection, EnterCriticalSection, INFINITE, InitializeCriticalSection,
LeaveCriticalSection, ReleaseSemaphore, WAIT_OBJECT_0, WaitForSingleObject+/;
private import core.sys.windows.windef /+: BOOL, DWORD+/;
private import core.sys.windows.winerror /+: WAIT_TIMEOUT+/;
}
else version (Posix)
{

19
libphobos/libdruntime/core/sync/mutex.d
View File

@ -20,7 +20,9 @@ public import core.sync.exception;
version (Windows)
{
private import core.sys.windows.windows;
private import core.sys.windows.winbase /+: CRITICAL_SECTION, DeleteCriticalSection,
EnterCriticalSection, InitializeCriticalSection, LeaveCriticalSection,
TryEnterCriticalSection+/;
}
else version (Posix)
{
@ -144,7 +146,7 @@ class Mutex :
{
import core.internal.abort : abort;
!pthread_mutex_destroy(&m_hndl) ||
abort("Error: pthread_mutex_init failed.");
abort("Error: pthread_mutex_destroy failed.");
}
this.__monitor = null;
}
@ -318,7 +320,7 @@ unittest
void useResource() shared @safe nothrow @nogc
{
mtx.lock_nothrow();
cargo++;
(cast() cargo) += 1;
mtx.unlock_nothrow();
}
}
@ -370,14 +372,15 @@ unittest
// should happen only from a single thread.
(cast(Mutex) mtx).__dtor();
// Verify that the underlying implementation has been destroyed
// by checking that locking is not possible. This assumes
// that the underlying implementation is well behaved
// and makes the object non-lockable upon destruction.
// The Bionic and Musl C runtimes and DragonFly don't appear to do so, so skip this test.
// Verify that the underlying implementation has been destroyed by checking
// that locking is not possible. This assumes that the underlying
// implementation is well behaved and makes the object non-lockable upon
// destruction. The Bionic, DragonFly, Musl, and Solaris C runtimes don't
// appear to do so, so skip this test.
version (CRuntime_Bionic) {} else
version (CRuntime_Musl) {} else
version (DragonFlyBSD) {} else
version (Solaris) {} else
assert(!mtx.tryLock_nothrow());
free(cast(void*) mtx);

30
libphobos/libdruntime/core/sync/semaphore.d
View File

@ -29,7 +29,11 @@ else version (WatchOS)
version (Windows)
{
private import core.sys.windows.windows;
private import core.sys.windows.basetsd /+: HANDLE+/;
private import core.sys.windows.winbase /+: CloseHandle, CreateSemaphoreA, INFINITE,
ReleaseSemaphore, WAIT_OBJECT_0, WaitForSingleObject+/;
private import core.sys.windows.windef /+: BOOL, DWORD+/;
private import core.sys.windows.winerror /+: WAIT_TIMEOUT+/;
}
else version (Darwin)
{
@ -337,19 +341,17 @@ class Semaphore
}
private:
version (Windows)
{
HANDLE m_hndl;
}
else version (Darwin)
{
semaphore_t m_hndl;
}
else version (Posix)
{
sem_t m_hndl;
}
protected:
/// Aliases the operating-system-specific semaphore type.
version (Windows) alias Handle = HANDLE;
/// ditto
else version (Darwin) alias Handle = semaphore_t;
/// ditto
else version (Posix) alias Handle = sem_t;
/// Handle to the system-specific semaphore.
Handle m_hndl;
}

134
libphobos/libdruntime/core/sys/posix/aio.d
View File

@ -93,6 +93,60 @@ else version (CRuntime_Musl)
ubyte[32-2*(void*).sizeof] __dummy4;
}
}
else version (CRuntime_UClibc)
{
import core.sys.posix.config;
import core.sys.posix.sys.types;
struct aiocb
{
int aio_fildes;
int aio_lio_opcode;
int aio_reqprio;
void* aio_buf; //volatile
size_t aio_nbytes;
sigevent aio_sigevent;
aiocb* __next_prio;
int __abs_prio;
int __policy;
int __error_code;
ssize_t __return_value;
static if (__USE_LARGEFILE64)
{
off_t aio_offset;
ubyte[off64_t.sizeof - off_t.sizeof] __pad;
}
else
{
off64_t aio_offset;
}
ubyte[32] __unused;
}
static if (__USE_LARGEFILE64)
{
struct aiocb64
{
int aio_fildes;
int aio_lio_opcode;
int aio_reqprio;
void* aio_buf; //volatile
size_t aio_nbytes;
sigevent aio_sigevent;
aiocb* __next_prio;
int __abs_prio;
int __policy;
int __error_code;
ssize_t __return_value;
off64_t aio_offset;
ubyte[32] __unused;
}
}
}
else version (Darwin)
{
struct aiocb
@ -210,6 +264,15 @@ else version (CRuntime_Musl)
AIO_ALLDONE
}
}
else version (CRuntime_UClibc)
{
enum
{
AIO_CANCELED,
AIO_NOTCANCELED,
AIO_ALLDONE
}
}
else version (Darwin)
{
enum
@ -257,6 +320,15 @@ else version (CRuntime_Musl)
LIO_NOP
}
}
else version (CRuntime_UClibc)
{
enum
{
LIO_READ,
LIO_WRITE,
LIO_NOP
}
}
else version (Darwin)
{
enum
@ -302,6 +374,14 @@ else version (CRuntime_Musl)
LIO_NOWAIT
}
}
else version (CRuntime_UClibc)
{
enum
{
LIO_WAIT,
LIO_NOWAIT
}
}
else version (Darwin)
{
enum
@ -362,6 +442,40 @@ version (CRuntime_Glibc)
int lio_listio(int mode, const(aiocb*)* aiocb_list, int nitems, sigevent* sevp);
}
}
version (CRuntime_UClibc)
{
static if (__USE_LARGEFILE64)
{
int aio_read64(aiocb64* aiocbp);
int aio_write64(aiocb64* aiocbp);
int aio_fsync64(int op, aiocb64* aiocbp);
int aio_error64(const(aiocb64)* aiocbp);
ssize_t aio_return64(aiocb64* aiocbp);
int aio_suspend64(const(aiocb64*)* aiocb_list, int nitems, const(timespec)* timeout);
int aio_cancel64(int fd, aiocb64* aiocbp);
int lio_listio64(int mode, const(aiocb64*)* aiocb_list, int nitems, sigevent* sevp);
alias aio_read = aio_read64;
alias aio_write = aio_write64;
alias aio_fsync = aio_fsync64;
alias aio_error = aio_error64;
alias aio_return = aio_return64;
alias aio_suspend = aio_suspend64;
alias aio_cancel = aio_cancel64;
alias lio_listio = lio_listio64;
}
else
{
int aio_read(aiocb* aiocbp);
int aio_write(aiocb* aiocbp);
int aio_fsync(int op, aiocb* aiocbp);
int aio_error(const(aiocb)* aiocbp);
ssize_t aio_return(aiocb* aiocbp);
int aio_suspend(const(aiocb*)* aiocb_list, int nitems, const(timespec)* timeout);
int aio_cancel(int fd, aiocb* aiocbp);
int lio_listio(int mode, const(aiocb*)* aiocb_list, int nitems, sigevent* sevp);
}
}
else
{
int aio_read(aiocb* aiocbp);
@ -395,6 +509,26 @@ version (CRuntime_Glibc)
void aio_init(const(aioinit)* init);
}
}
version (CRuntime_UClibc)
{
static if (__USE_GNU)
{
/* To customize the implementation one can use the following struct. */
struct aioinit
{
int aio_threads;
int aio_num;
int aio_locks;
int aio_usedba;
int aio_debug;
int aio_numusers;
int aio_idle_time;
int aio_reserved;
}
void aio_init(const(aioinit)* init);
}
}
else version (FreeBSD)
{
int aio_waitcomplete(aiocb** aiocb_list, const(timespec)* timeout);

9
libphobos/libdruntime/core/sys/posix/fcntl.d
View File

@ -868,7 +868,7 @@ else version (CRuntime_UClibc)
enum F_UNLCK = 2;
enum F_WRLCK = 1;
version (X86_64)
version (X86_Any)
{
enum O_CREAT = 0x40; // octal 0100
enum O_EXCL = 0x80; // octal 0200
@ -877,12 +877,13 @@ else version (CRuntime_UClibc)
enum O_APPEND = 0x400; // octal 02000
enum O_NONBLOCK = 0x800; // octal 04000
enum O_CLOEXEC = 0x80000; // octal 02000000
enum O_SYNC = 0x1000; // octal 010000
enum O_NDELAY = O_NONBLOCK;
enum O_FSYNC = O_SYNC;
enum O_ASYNC = 0x2000; // octal 020000
}
else version (MIPS32)
else version (MIPS_Any)
{
enum O_CREAT = 0x0100;
enum O_EXCL = 0x0400;
@ -892,11 +893,12 @@ else version (CRuntime_UClibc)
enum O_APPEND = 0x0008;
enum O_SYNC = 0x0010;
enum O_NONBLOCK = 0x0080;
enum O_CLOEXEC = 0x80000; // octal 02000000
enum O_NDELAY = O_NONBLOCK;
enum O_FSYNC = O_SYNC;
enum O_ASYNC = 0x1000;
}
else version (ARM)
else version (ARM_Any)
{
enum O_CREAT = 0x40; // octal 0100
enum O_EXCL = 0x80; // octal 0200
@ -905,6 +907,7 @@ else version (CRuntime_UClibc)
enum O_APPEND = 0x400; // octal 02000
enum O_NONBLOCK = 0x800; // octal 04000
enum O_CLOEXEC = 0x80000; // octal 02000000
enum O_SYNC = 0x1000; // octal 010000
enum O_NDELAY = O_NONBLOCK;
enum O_FSYNC = O_SYNC;

56
libphobos/libdruntime/core/sys/posix/stdio.d
View File

@ -180,6 +180,37 @@ else version (CRuntime_UClibc)
FILE* tmpfile();
}
}
else version (Solaris)
{
static if (__USE_FILE_OFFSET64 && __WORDSIZE != 64)
{
int fgetpos64(FILE*, fpos_t *);
alias fgetpos = fgetpos64;
FILE* fopen64(in char*, in char*);
alias fopen = fopen64;
FILE* freopen64(in char*, in char*, FILE*);
alias freopen = freopen64;
int fseek(FILE*, c_long, int);
int fsetpos64(FILE*, in fpos_t*);
alias fsetpos = fsetpos64;
FILE* tmpfile64();
alias tmpfile = tmpfile64;
}
else
{
int fgetpos(FILE*, fpos_t *);
FILE* fopen(in char*, in char*);
FILE* freopen(in char*, in char*, FILE*);
int fseek(FILE*, c_long, int);
int fsetpos(FILE*, in fpos_t*);
FILE* tmpfile();
}
}
//
// C Extension (CX)
@ -246,6 +277,31 @@ else version (CRuntime_UClibc)
off_t ftello(FILE*);
}
}
else version (Solaris)
{
enum L_ctermid = 9;
enum L_cuserid = 9;
static if (__USE_FILE_OFFSET64 && __WORDSIZE != 64)
{
int fseeko64(FILE*, off_t, int);
alias fseeko = fseeko64;
}
else
{
int fseeko(FILE*, off_t, int);
}
static if (__USE_FILE_OFFSET64 && __WORDSIZE != 64)
{
off_t ftello64(FILE*);
alias ftello = ftello64;
}
else
{
off_t ftello(FILE*);
}
}
else version (Posix)
{
int fseeko(FILE*, off_t, int);

17
libphobos/libdruntime/core/sys/posix/sys/socket.d
View File

@ -1941,31 +1941,37 @@ else version (CRuntime_UClibc)
int l_linger;
}
version (X86_64)
version (X86_Any)
{
enum
{
SOCK_DGRAM = 2,
SOCK_SEQPACKET = 5,
SOCK_STREAM = 1
SOCK_STREAM = 1,
SOCK_CLOEXEC = 0x80000, // octal 02000000
SOCK_NONBLOCK = 0x800 // octal 00004000
}
}
else version (MIPS32)
else version (MIPS_Any)
{
enum
{
SOCK_DGRAM = 1,
SOCK_SEQPACKET = 5,
SOCK_STREAM = 2,
SOCK_CLOEXEC = 0x80000, // octal 02000000
SOCK_NONBLOCK = 0x80 // octal 00000200
}
}
else version (ARM)
else version (ARM_Any)
{
enum
{
SOCK_DGRAM = 2,
SOCK_SEQPACKET = 5,
SOCK_STREAM = 1
SOCK_STREAM = 1,
SOCK_CLOEXEC = 0x80000, // octal 02000000
SOCK_NONBLOCK = 0x800 // octal 00004000
}
}
else
@ -1991,6 +1997,7 @@ else version (CRuntime_UClibc)
SO_TYPE = 3,
SOL_SOCKET = 1,
SOL_TCP = 6,
SOMAXCONN = 128
}

1
libphobos/libdruntime/core/sys/solaris/dlfcn.d
View File

@ -9,6 +9,7 @@ module core.sys.solaris.dlfcn;
version (Solaris):
extern (C):
nothrow:
@nogc:
public import core.sys.posix.dlfcn;
import core.stdc.config;

8
libphobos/libdruntime/core/sys/solaris/sys/link.d
View File

@ -15,22 +15,22 @@ import core.stdc.config;
struct Elf32_Dyn
{
Elf32_Sword d_tag;
union d_un
union _d_un
{
Elf32_Word d_val;
Elf32_Addr d_ptr;
Elf32_Off d_off;
}
} _d_un d_un;
}
struct Elf64_Dyn
{
Elf64_Xword d_tag;
union d_un
union _d_un
{
Elf64_Xword d_val;
Elf64_Addr d_ptr;
}
} _d_un d_un;
}
enum DT_NULL = 0;

2
libphobos/libdruntime/core/sys/windows/shlobj.d
View File

@ -708,7 +708,7 @@ static if (_WIN32_IE >= 0x500) {
ULONG dwFlags;
DWORD dwFileAttributes;
ULONG dwReserved;
WCHAR *pwszExt = 0;
WCHAR *pwszExt = null;
WCHAR[MAX_PATH] wszFile = 0;
}
alias SHCOLUMNDATA* LPSHCOLUMNDATA;

18
libphobos/libdruntime/core/sys/windows/threadaux.d
View File

@ -24,7 +24,7 @@ import core.stdc.stdlib;
public import core.thread;
extern(Windows)
HANDLE OpenThread(DWORD dwDesiredAccess, BOOL bInheritHandle, DWORD dwThreadId) nothrow;
HANDLE OpenThread(DWORD dwDesiredAccess, BOOL bInheritHandle, DWORD dwThreadId) nothrow @nogc;
extern (C) extern __gshared int _tls_index;
@ -113,7 +113,7 @@ struct thread_aux
}
alias fnNtQuerySystemInformation = extern(Windows)
HRESULT function( uint SystemInformationClass, void* info, uint infoLength, uint* ReturnLength ) nothrow;
HRESULT function( uint SystemInformationClass, void* info, uint infoLength, uint* ReturnLength ) nothrow @nogc;
enum ThreadBasicInformation = 0;
@ -129,7 +129,7 @@ struct thread_aux
}
alias fnNtQueryInformationThread = extern(Windows)
int function( HANDLE ThreadHandle, uint ThreadInformationClass, void* buf, uint size, uint* ReturnLength ) nothrow;
int function( HANDLE ThreadHandle, uint ThreadInformationClass, void* buf, uint size, uint* ReturnLength ) nothrow @nogc;
enum SYNCHRONIZE = 0x00100000;
enum THREAD_GET_CONTEXT = 8;
@ -138,7 +138,7 @@ struct thread_aux
///////////////////////////////////////////////////////////////////
// get the thread environment block (TEB) of the thread with the given handle
static void** getTEB( HANDLE hnd ) nothrow
static void** getTEB( HANDLE hnd ) nothrow @nogc
{
HANDLE nthnd = GetModuleHandleA( "NTDLL" );
assert( nthnd, "cannot get module handle for ntdll" );
@ -153,7 +153,7 @@ struct thread_aux
}
// get the thread environment block (TEB) of the thread with the given identifier
static void** getTEB( uint id ) nothrow
static void** getTEB( uint id ) nothrow @nogc
{
HANDLE hnd = OpenThread( THREAD_QUERY_INFORMATION, FALSE, id );
assert( hnd, "OpenThread failed" );
@ -164,7 +164,7 @@ struct thread_aux
}
// get linear address of TEB of current thread
static void** getTEB() nothrow
static void** getTEB() nothrow @nogc
{
version (Win32)
{
@ -210,21 +210,21 @@ struct thread_aux
}
// get the stack bottom (the top address) of the thread with the given handle
static void* getThreadStackBottom( HANDLE hnd ) nothrow
static void* getThreadStackBottom( HANDLE hnd ) nothrow @nogc
{
void** teb = getTEB( hnd );
return teb[1];
}
// get the stack bottom (the top address) of the thread with the given identifier
static void* getThreadStackBottom( uint id ) nothrow
static void* getThreadStackBottom( uint id ) nothrow @nogc
{
void** teb = getTEB( id );
return teb[1];
}
// create a thread handle with full access to the thread with the given identifier
static HANDLE OpenThreadHandle( uint id ) nothrow
static HANDLE OpenThreadHandle( uint id ) nothrow @nogc
{
return OpenThread( SYNCHRONIZE|THREAD_GET_CONTEXT|THREAD_QUERY_INFORMATION|THREAD_SUSPEND_RESUME, FALSE, id );
}

34
libphobos/libdruntime/core/time.d
View File

@ -85,7 +85,7 @@ import core.internal.string;
version (Windows)
{
import core.sys.windows.windows;
import core.sys.windows.winbase /+: QueryPerformanceCounter, QueryPerformanceFrequency+/;
}
else version (Posix)
{
@ -195,7 +195,7 @@ version (CoreDdoc) enum ClockType
extremely frequently (e.g. hundreds of thousands of times a second) but
don't care about high precision, the coarse clock might be appropriate.
Currently, only Linux and FreeBSD support a coarser clock, and on other
Currently, only Linux and FreeBSD/DragonFlyBSD support a coarser clock, and on other
platforms, it's treated as $(D ClockType.normal).
+/
coarse = 2,
@ -207,7 +207,7 @@ version (CoreDdoc) enum ClockType
more precise clock than the normal one, it's treated as equivalent to
$(D ClockType.normal).
Currently, only FreeBSD supports a more precise clock, where it uses
Currently, only FreeBSD/DragonFlyBSD supports a more precise clock, where it uses
$(D CLOCK_MONOTONIC_PRECISE) for the monotonic time and
$(D CLOCK_REALTIME_PRECISE) for the wall clock time.
+/
@ -231,7 +231,7 @@ version (CoreDdoc) enum ClockType
Uses a clock that has a precision of one second (contrast to the coarse
clock, which has sub-second precision like the normal clock does).
FreeBSD is the only system which specifically has a clock set up for
FreeBSD/DragonFlyBSD are the only systems which specifically have a clock set up for
this (it has $(D CLOCK_SECOND) to use with $(D clock_gettime) which
takes advantage of an in-kernel cached value), but on other systems, the
fastest function available will be used, and the resulting $(D SysTime)
@ -320,6 +320,16 @@ else version (NetBSD) enum ClockType
precise = 3,
second = 6,
}
else version (DragonFlyBSD) enum ClockType
{
normal = 0,
coarse = 2,
precise = 3,
second = 6,
uptime = 8,
uptimeCoarse = 9,
uptimePrecise = 10,
}
else version (Solaris) enum ClockType
{
normal = 0,
@ -386,6 +396,20 @@ version (Posix)
case second: assert(0);
}
}
else version (DragonFlyBSD)
{
import core.sys.dragonflybsd.time;
with(ClockType) final switch (clockType)
{
case coarse: return CLOCK_MONOTONIC_FAST;
case normal: return CLOCK_MONOTONIC;
case precise: return CLOCK_MONOTONIC_PRECISE;
case uptime: return CLOCK_UPTIME;
case uptimeCoarse: return CLOCK_UPTIME_FAST;
case uptimePrecise: return CLOCK_UPTIME_PRECISE;
case second: assert(0);
}
}
else version (Solaris)
{
import core.sys.solaris.time;
@ -451,6 +475,8 @@ unittest
Examples:
--------------------
import std.datetime;
assert(dur!"days"(12) == dur!"hnsecs"(10_368_000_000_000L));
assert(dur!"hnsecs"(27) == dur!"hnsecs"(27));
assert(std.datetime.Date(2010, 9, 7) + dur!"days"(5) ==

7
libphobos/libdruntime/gc/os.d
View File

@ -16,7 +16,8 @@ module gc.os;
version (Windows)
{
import core.sys.windows.windows;
import core.sys.windows.winbase : GetCurrentThreadId, VirtualAlloc, VirtualFree;
import core.sys.windows.winnt : MEM_COMMIT, MEM_RELEASE, MEM_RESERVE, PAGE_READWRITE;
alias int pthread_t;
@ -40,9 +41,11 @@ else version (Posix)
import core.sys.posix.sys.mman;
version (FreeBSD) import core.sys.freebsd.sys.mman : MAP_ANON;
version (DragonFlyBSD) import core.sys.dragonflybsd.sys.mman : MAP_ANON;
version (NetBSD) import core.sys.netbsd.sys.mman : MAP_ANON;
version (CRuntime_Glibc) import core.sys.linux.sys.mman : MAP_ANON;
version (Darwin) import core.sys.darwin.sys.mman : MAP_ANON;
version (CRuntime_UClibc) import core.sys.linux.sys.mman : MAP_ANON;
import core.stdc.stdlib;
//version = GC_Use_Alloc_MMap;
@ -170,7 +173,7 @@ version (Windows)
return false;
else
{
import core.sys.windows.windows;
import core.sys.windows.winbase : GlobalMemoryStatus, MEMORYSTATUS;
MEMORYSTATUS stat;
GlobalMemoryStatus(&stat);
// Less than 5 % of virtual address space available