* cygerrno.h (geterrno_from_nt_status): Declare.

* errno.cc (geterrno_from_nt_status): Define.
	* flock.cc: Fix copyright dates.
	* ntdll.h (enum _TIMER_TYPE): Define.
	(PTIMER_APC_ROUTINE): Define.
	(NtCancelTimer): Declare.
	(NtCreateTimer): Declare.
	(NtSetTimer): Declare.
	* posix_ipc.cc (ipc_cond_timedwait): Rewrite to make interruptible and
	restartable.  Call pthread_testcancel in case of timeout to enable
	pthread_cancel on waiting thread.  Replace WFMO timeout with waiting
	for a waitable timer.  Explain why.  Replace single call to WFMO with
	two calls, one for the event, one for the mutex.  Don't lock mutex in
	case of error.
	(ipc_cond_signal): Make void function.
	(ipc_cond_close): Ditto.
	(_mq_send): Immediately return -1 in case of error from
	ipc_cond_timedwait.
	(_mq_receive): Ditto.

winsup/cygwin/ntdll.h

@@ -948,6 +948,14 @@ typedef struct _KEY_VALUE_PARTIAL_INFORMATION
   UCHAR Data[1];
 } KEY_VALUE_PARTIAL_INFORMATION, *PKEY_VALUE_PARTIAL_INFORMATION;
 
+typedef enum _TIMER_TYPE
+{
+  NotificationTimer,
+  SynchronisationTimer
+} TIMER_TYPE, *PTIMER_TYPE;
+
+typedef VOID (APIENTRY *PTIMER_APC_ROUTINE)(PVOID, ULONG, ULONG);
+
 /* Function declarations for ntdll.dll.  These don't appear in any
    standard Win32 header.  */
 
@@ -970,6 +978,7 @@ extern "C"
 					  ULONG, PTOKEN_PRIVILEGES, PULONG);
   NTSTATUS NTAPI NtAllocateLocallyUniqueId (PLUID);
   NTSTATUS NTAPI NtAllocateUuids (PLARGE_INTEGER, PULONG, PULONG, PUCHAR);
+  NTSTATUS NTAPI NtCancelTimer (HANDLE, PBOOLEAN);
   NTSTATUS NTAPI NtClose (HANDLE);
   NTSTATUS NTAPI NtCommitTransaction (HANDLE, BOOLEAN);
   NTSTATUS NTAPI NtCreateDirectoryObject (PHANDLE, ACCESS_MASK,
@@ -990,6 +999,8 @@ extern "C"
 				  PLARGE_INTEGER, ULONG, ULONG, HANDLE);
   NTSTATUS NTAPI NtCreateSemaphore (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
 				    LONG, LONG);
+  NTSTATUS NTAPI NtCreateTimer (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
+				TIMER_TYPE);
   NTSTATUS NTAPI NtCreateToken (PHANDLE, ACCESS_MASK, POBJECT_ATTRIBUTES,
 				TOKEN_TYPE, PLUID, PLARGE_INTEGER, PTOKEN_USER,
 				PTOKEN_GROUPS, PTOKEN_PRIVILEGES, PTOKEN_OWNER,
@@ -1081,6 +1092,8 @@ extern "C"
 					ULONG);
   NTSTATUS NTAPI NtSetSecurityObject (HANDLE, SECURITY_INFORMATION,
 				      PSECURITY_DESCRIPTOR);
+  NTSTATUS NTAPI NtSetTimer (HANDLE, PLARGE_INTEGER, PTIMER_APC_ROUTINE, PVOID,
+			     BOOLEAN, LONG, PBOOLEAN);
   NTSTATUS NTAPI NtSetTimerResolution (ULONG, BOOLEAN, PULONG);
   NTSTATUS NTAPI NtSetValueKey (HANDLE, PUNICODE_STRING, ULONG, ULONG, PVOID,
 				ULONG);